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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QWidget Class Reference</h1>
<p>The QWidget class is the base class of all user interface objects.
<a href="#details">More...</a>
<p><tt>#include <<a href="qwidget-h.html">qwidget.h</a>></tt>
<p>Inherits <a href="qobject.html">QObject</a> and <a href="qpaintdevice.html">QPaintDevice</a>.
<p>Inherited by <a href="qbutton.html">QButton</a>, <a href="qframe.html">QFrame</a>, <a href="qdialog.html">QDialog</a>, <a href="qcombobox.html">QComboBox</a>, <a href="qdatabrowser.html">QDataBrowser</a>, <a href="qdataview.html">QDataView</a>, <a href="qdatetimeedit.html">QDateTimeEdit</a>, <a href="qdesktopwidget.html">QDesktopWidget</a>, <a href="qdial.html">QDial</a>, <a href="qdockarea.html">QDockArea</a>, <a href="qglwidget.html">QGLWidget</a>, <a href="qheader.html">QHeader</a>, <a href="qmainwindow.html">QMainWindow</a>, <a href="qnpwidget.html">QNPWidget</a>, <a href="qscrollbar.html">QScrollBar</a>, <a href="qsizegrip.html">QSizeGrip</a>, <a href="qslider.html">QSlider</a>, <a href="qspinbox.html">QSpinBox</a>, <a href="qstatusbar.html">QStatusBar</a>, <a href="qtabbar.html">QTabBar</a>, <a href="qtabwidget.html">QTabWidget</a>, <a href="qworkspace.html">QWorkspace</a> and <a href="qxtwidget.html">QXtWidget</a>.
<p><a href="qwidget-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><div class=fn><a href="#QWidget"><b>QWidget</b></a> ( QWidget * parent = 0, const char * name = 0, WFlags f = 0 )</div></li>
<li><div class=fn><a href="#~QWidget"><b>~QWidget</b></a> ()</div></li>
<li><div class=fn>WId <a href="#winId"><b>winId</b></a> () const</div></li>
<li><div class=fn>QStyle & <a href="#style"><b>style</b></a> () const</div></li>
<li><div class=fn>void <a href="#setStyle"><b>setStyle</b></a> ( QStyle * style )</div></li>
<li><div class=fn>QStyle * <a href="#setStyle-2"><b>setStyle</b></a> ( const QString & style )</div></li>
<li><div class=fn>bool <a href="#isTopLevel"><b>isTopLevel</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isDialog"><b>isDialog</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isPopup"><b>isPopup</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isDesktop"><b>isDesktop</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isModal"><b>isModal</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isEnabled"><b>isEnabled</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isEnabledTo"><b>isEnabledTo</b></a> ( QWidget * ancestor ) const</div></li>
<li><div class=fn>bool isEnabledToTLW () const <em>(obsolete)</em></div></li>
<li><div class=fn>QRect <a href="#frameGeometry"><b>frameGeometry</b></a> () const</div></li>
<li><div class=fn>const QRect & <a href="#geometry"><b>geometry</b></a> () const</div></li>
<li><div class=fn>int <a href="#x"><b>x</b></a> () const</div></li>
<li><div class=fn>int <a href="#y"><b>y</b></a> () const</div></li>
<li><div class=fn>QPoint <a href="#pos"><b>pos</b></a> () const</div></li>
<li><div class=fn>QSize <a href="#frameSize"><b>frameSize</b></a> () const</div></li>
<li><div class=fn>QSize <a href="#size"><b>size</b></a> () const</div></li>
<li><div class=fn>int <a href="#width"><b>width</b></a> () const</div></li>
<li><div class=fn>int <a href="#height"><b>height</b></a> () const</div></li>
<li><div class=fn>QRect <a href="#rect"><b>rect</b></a> () const</div></li>
<li><div class=fn>QRect <a href="#childrenRect"><b>childrenRect</b></a> () const</div></li>
<li><div class=fn>QRegion <a href="#childrenRegion"><b>childrenRegion</b></a> () const</div></li>
<li><div class=fn>QSize <a href="#minimumSize"><b>minimumSize</b></a> () const</div></li>
<li><div class=fn>QSize <a href="#maximumSize"><b>maximumSize</b></a> () const</div></li>
<li><div class=fn>int <a href="#minimumWidth"><b>minimumWidth</b></a> () const</div></li>
<li><div class=fn>int <a href="#minimumHeight"><b>minimumHeight</b></a> () const</div></li>
<li><div class=fn>int <a href="#maximumWidth"><b>maximumWidth</b></a> () const</div></li>
<li><div class=fn>int <a href="#maximumHeight"><b>maximumHeight</b></a> () const</div></li>
<li><div class=fn>void <a href="#setMinimumSize"><b>setMinimumSize</b></a> ( const QSize & )</div></li>
<li><div class=fn>virtual void <a href="#setMinimumSize-2"><b>setMinimumSize</b></a> ( int minw, int minh )</div></li>
<li><div class=fn>void <a href="#setMaximumSize"><b>setMaximumSize</b></a> ( const QSize & )</div></li>
<li><div class=fn>virtual void <a href="#setMaximumSize-2"><b>setMaximumSize</b></a> ( int maxw, int maxh )</div></li>
<li><div class=fn>void <a href="#setMinimumWidth"><b>setMinimumWidth</b></a> ( int minw )</div></li>
<li><div class=fn>void <a href="#setMinimumHeight"><b>setMinimumHeight</b></a> ( int minh )</div></li>
<li><div class=fn>void <a href="#setMaximumWidth"><b>setMaximumWidth</b></a> ( int maxw )</div></li>
<li><div class=fn>void <a href="#setMaximumHeight"><b>setMaximumHeight</b></a> ( int maxh )</div></li>
<li><div class=fn>QSize <a href="#sizeIncrement"><b>sizeIncrement</b></a> () const</div></li>
<li><div class=fn>void <a href="#setSizeIncrement"><b>setSizeIncrement</b></a> ( const QSize & )</div></li>
<li><div class=fn>virtual void <a href="#setSizeIncrement-2"><b>setSizeIncrement</b></a> ( int w, int h )</div></li>
<li><div class=fn>QSize <a href="#baseSize"><b>baseSize</b></a> () const</div></li>
<li><div class=fn>void <a href="#setBaseSize"><b>setBaseSize</b></a> ( const QSize & )</div></li>
<li><div class=fn>void <a href="#setBaseSize-2"><b>setBaseSize</b></a> ( int basew, int baseh )</div></li>
<li><div class=fn>void <a href="#setFixedSize"><b>setFixedSize</b></a> ( const QSize & s )</div></li>
<li><div class=fn>void <a href="#setFixedSize-2"><b>setFixedSize</b></a> ( int w, int h )</div></li>
<li><div class=fn>void <a href="#setFixedWidth"><b>setFixedWidth</b></a> ( int w )</div></li>
<li><div class=fn>void <a href="#setFixedHeight"><b>setFixedHeight</b></a> ( int h )</div></li>
<li><div class=fn>QPoint <a href="#mapToGlobal"><b>mapToGlobal</b></a> ( const QPoint & pos ) const</div></li>
<li><div class=fn>QPoint <a href="#mapFromGlobal"><b>mapFromGlobal</b></a> ( const QPoint & pos ) const</div></li>
<li><div class=fn>QPoint <a href="#mapToParent"><b>mapToParent</b></a> ( const QPoint & pos ) const</div></li>
<li><div class=fn>QPoint <a href="#mapFromParent"><b>mapFromParent</b></a> ( const QPoint & pos ) const</div></li>
<li><div class=fn>QPoint <a href="#mapTo"><b>mapTo</b></a> ( QWidget * parent, const QPoint & pos ) const</div></li>
<li><div class=fn>QPoint <a href="#mapFrom"><b>mapFrom</b></a> ( QWidget * parent, const QPoint & pos ) const</div></li>
<li><div class=fn>QWidget * <a href="#topLevelWidget"><b>topLevelWidget</b></a> () const</div></li>
<li><div class=fn>BackgroundMode <a href="#backgroundMode"><b>backgroundMode</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setBackgroundMode"><b>setBackgroundMode</b></a> ( BackgroundMode )</div></li>
<li><div class=fn>void <a href="#setBackgroundMode-2"><b>setBackgroundMode</b></a> ( BackgroundMode m, BackgroundMode visual )</div></li>
<li><div class=fn>const QColor & <a href="#foregroundColor"><b>foregroundColor</b></a> () const</div></li>
<li><div class=fn>const QColor & <a href="#eraseColor"><b>eraseColor</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setEraseColor"><b>setEraseColor</b></a> ( const QColor & color )</div></li>
<li><div class=fn>const QPixmap * <a href="#erasePixmap"><b>erasePixmap</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setErasePixmap"><b>setErasePixmap</b></a> ( const QPixmap & pixmap )</div></li>
<li><div class=fn>const QColorGroup & <a href="#colorGroup"><b>colorGroup</b></a> () const</div></li>
<li><div class=fn>const QPalette & <a href="#palette"><b>palette</b></a> () const</div></li>
<li><div class=fn>bool <a href="#ownPalette"><b>ownPalette</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setPalette"><b>setPalette</b></a> ( const QPalette & )</div></li>
<li><div class=fn>void <a href="#unsetPalette"><b>unsetPalette</b></a> ()</div></li>
<li><div class=fn>const QColor & <a href="#paletteForegroundColor"><b>paletteForegroundColor</b></a> () const</div></li>
<li><div class=fn>void <a href="#setPaletteForegroundColor"><b>setPaletteForegroundColor</b></a> ( const QColor & )</div></li>
<li><div class=fn>const QColor & <a href="#paletteBackgroundColor"><b>paletteBackgroundColor</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setPaletteBackgroundColor"><b>setPaletteBackgroundColor</b></a> ( const QColor & )</div></li>
<li><div class=fn>const QPixmap * <a href="#paletteBackgroundPixmap"><b>paletteBackgroundPixmap</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setPaletteBackgroundPixmap"><b>setPaletteBackgroundPixmap</b></a> ( const QPixmap & )</div></li>
<li><div class=fn>const QBrush & <a href="#backgroundBrush"><b>backgroundBrush</b></a> () const</div></li>
<li><div class=fn>QFont <a href="#font"><b>font</b></a> () const</div></li>
<li><div class=fn>bool <a href="#ownFont"><b>ownFont</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setFont"><b>setFont</b></a> ( const QFont & )</div></li>
<li><div class=fn>void <a href="#unsetFont"><b>unsetFont</b></a> ()</div></li>
<li><div class=fn>QFontMetrics <a href="#fontMetrics"><b>fontMetrics</b></a> () const</div></li>
<li><div class=fn>QFontInfo <a href="#fontInfo"><b>fontInfo</b></a> () const</div></li>
<li><div class=fn>const QCursor & <a href="#cursor"><b>cursor</b></a> () const</div></li>
<li><div class=fn>bool <a href="#ownCursor"><b>ownCursor</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setCursor"><b>setCursor</b></a> ( const QCursor & )</div></li>
<li><div class=fn>virtual void <a href="#unsetCursor"><b>unsetCursor</b></a> ()</div></li>
<li><div class=fn>QString <a href="#caption"><b>caption</b></a> () const</div></li>
<li><div class=fn>const QPixmap * <a href="#icon"><b>icon</b></a> () const</div></li>
<li><div class=fn>QString <a href="#iconText"><b>iconText</b></a> () const</div></li>
<li><div class=fn>bool <a href="#hasMouseTracking"><b>hasMouseTracking</b></a> () const</div></li>
<li><div class=fn>bool <a href="#hasMouse"><b>hasMouse</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setMask"><b>setMask</b></a> ( const QBitmap & bitmap )</div></li>
<li><div class=fn>virtual void <a href="#setMask-2"><b>setMask</b></a> ( const QRegion & region )</div></li>
<li><div class=fn>void <a href="#clearMask"><b>clearMask</b></a> ()</div></li>
<li><div class=fn>const QColor & backgroundColor () const <em>(obsolete)</em></div></li>
<li><div class=fn>virtual void setBackgroundColor ( const QColor & c ) <em>(obsolete)</em></div></li>
<li><div class=fn>const QPixmap * backgroundPixmap () const <em>(obsolete)</em></div></li>
<li><div class=fn>virtual void setBackgroundPixmap ( const QPixmap & pm ) <em>(obsolete)</em></div></li>
<li><div class=fn>enum <a href="#FocusPolicy-enum"><b>FocusPolicy</b></a> { NoFocus = 0, TabFocus = 0x1, ClickFocus = 0x2, StrongFocus = 0x3, WheelFocus = 0x7 }</div></li>
<li><div class=fn>bool <a href="#isActiveWindow"><b>isActiveWindow</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setActiveWindow"><b>setActiveWindow</b></a> ()</div></li>
<li><div class=fn>bool <a href="#isFocusEnabled"><b>isFocusEnabled</b></a> () const</div></li>
<li><div class=fn>FocusPolicy <a href="#focusPolicy"><b>focusPolicy</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setFocusPolicy"><b>setFocusPolicy</b></a> ( FocusPolicy )</div></li>
<li><div class=fn>bool <a href="#hasFocus"><b>hasFocus</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setFocusProxy"><b>setFocusProxy</b></a> ( QWidget * w )</div></li>
<li><div class=fn>QWidget * <a href="#focusProxy"><b>focusProxy</b></a> () const</div></li>
<li><div class=fn>void <a href="#grabMouse"><b>grabMouse</b></a> ()</div></li>
<li><div class=fn>void <a href="#grabMouse-2"><b>grabMouse</b></a> ( const QCursor & cursor )</div></li>
<li><div class=fn>void <a href="#releaseMouse"><b>releaseMouse</b></a> ()</div></li>
<li><div class=fn>void <a href="#grabKeyboard"><b>grabKeyboard</b></a> ()</div></li>
<li><div class=fn>void <a href="#releaseKeyboard"><b>releaseKeyboard</b></a> ()</div></li>
<li><div class=fn>bool <a href="#isUpdatesEnabled"><b>isUpdatesEnabled</b></a> () const</div></li>
<li><div class=fn>virtual bool <a href="#close-2"><b>close</b></a> ( bool alsoDelete )</div></li>
<li><div class=fn>bool <a href="#isVisible"><b>isVisible</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isVisibleTo"><b>isVisibleTo</b></a> ( QWidget * ancestor ) const</div></li>
<li><div class=fn>bool isVisibleToTLW () const <em>(obsolete)</em></div></li>
<li><div class=fn>QRect <a href="#visibleRect"><b>visibleRect</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isHidden"><b>isHidden</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isMinimized"><b>isMinimized</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isMaximized"><b>isMaximized</b></a> () const</div></li>
<li><div class=fn>virtual QSize <a href="#sizeHint"><b>sizeHint</b></a> () const</div></li>
<li><div class=fn>virtual QSize <a href="#minimumSizeHint"><b>minimumSizeHint</b></a> () const</div></li>
<li><div class=fn>virtual QSizePolicy <a href="#sizePolicy"><b>sizePolicy</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setSizePolicy"><b>setSizePolicy</b></a> ( QSizePolicy )</div></li>
<li><div class=fn>virtual int <a href="#heightForWidth"><b>heightForWidth</b></a> ( int w ) const</div></li>
<li><div class=fn>virtual void <a href="#adjustSize"><b>adjustSize</b></a> ()</div></li>
<li><div class=fn>QLayout * <a href="#layout"><b>layout</b></a> () const</div></li>
<li><div class=fn>void <a href="#updateGeometry"><b>updateGeometry</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#reparent"><b>reparent</b></a> ( QWidget * parent, WFlags f, const QPoint & p, bool showIt = FALSE )</div></li>
<li><div class=fn>void <a href="#reparent-2"><b>reparent</b></a> ( QWidget * parent, const QPoint & p, bool showIt = FALSE )</div></li>
<li><div class=fn>void recreate ( QWidget * parent, WFlags f, const QPoint & p, bool showIt = FALSE ) <em>(obsolete)</em></div></li>
<li><div class=fn>void <a href="#erase-2"><b>erase</b></a> ()</div></li>
<li><div class=fn>void <a href="#erase"><b>erase</b></a> ( int x, int y, int w, int h )</div></li>
<li><div class=fn>void <a href="#erase-3"><b>erase</b></a> ( const QRect & r )</div></li>
<li><div class=fn>void <a href="#erase-4"><b>erase</b></a> ( const QRegion & reg )</div></li>
<li><div class=fn>void <a href="#scroll"><b>scroll</b></a> ( int dx, int dy )</div></li>
<li><div class=fn>void <a href="#scroll-2"><b>scroll</b></a> ( int dx, int dy, const QRect & r )</div></li>
<li><div class=fn>void <a href="#drawText"><b>drawText</b></a> ( int x, int y, const QString & str )</div></li>
<li><div class=fn>void <a href="#drawText-2"><b>drawText</b></a> ( const QPoint & pos, const QString & str )</div></li>
<li><div class=fn>QWidget * <a href="#focusWidget"><b>focusWidget</b></a> () const</div></li>
<li><div class=fn>QRect <a href="#microFocusHint"><b>microFocusHint</b></a> () const</div></li>
<li><div class=fn>bool <a href="#acceptDrops"><b>acceptDrops</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setAcceptDrops"><b>setAcceptDrops</b></a> ( bool on )</div></li>
<li><div class=fn>virtual void <a href="#setAutoMask"><b>setAutoMask</b></a> ( bool )</div></li>
<li><div class=fn>bool <a href="#autoMask"><b>autoMask</b></a> () const</div></li>
<li><div class=fn>enum <a href="#BackgroundOrigin-enum"><b>BackgroundOrigin</b></a> { WidgetOrigin, ParentOrigin, WindowOrigin }</div></li>
<li><div class=fn>virtual void <a href="#setBackgroundOrigin"><b>setBackgroundOrigin</b></a> ( BackgroundOrigin )</div></li>
<li><div class=fn>BackgroundOrigin <a href="#backgroundOrigin"><b>backgroundOrigin</b></a> () const</div></li>
<li><div class=fn>virtual bool <a href="#customWhatsThis"><b>customWhatsThis</b></a> () const</div></li>
<li><div class=fn>QWidget * <a href="#parentWidget"><b>parentWidget</b></a> ( bool sameWindow = FALSE ) const</div></li>
<li><div class=fn>WFlags <a href="#testWFlags"><b>testWFlags</b></a> ( WFlags f ) const</div></li>
<li><div class=fn>QWidget * <a href="#childAt"><b>childAt</b></a> ( int x, int y, bool includeThis = FALSE ) const</div></li>
<li><div class=fn>QWidget * <a href="#childAt-2"><b>childAt</b></a> ( const QPoint & p, bool includeThis = FALSE ) const</div></li>
<li><div class=fn>virtual QGfx * <b>graphicsContext</b> ( bool clip_children = TRUE ) const</div></li>
<li><div class=fn>QRegion <b>clippedRegion</b> ( bool do_children = TRUE )</div></li>
<li><div class=fn>uint <b>clippedSerial</b> ( bool do_children = TRUE )</div></li>
<li><div class=fn>virtual CGContextRef <b>macCGContext</b> ( bool clipped = TRUE ) const</div></li>
<li><div class=fn>void setPalette ( const QPalette & p, bool ) <em>(obsolete)</em></div></li>
<li><div class=fn>void setFont ( const QFont & f, bool ) <em>(obsolete)</em></div></li>
</ul>
<h2>Public Slots</h2>
<ul>
<li><div class=fn>virtual void <a href="#setEnabled"><b>setEnabled</b></a> ( bool )</div></li>
<li><div class=fn>void <a href="#setDisabled"><b>setDisabled</b></a> ( bool disable )</div></li>
<li><div class=fn>virtual void <a href="#setCaption"><b>setCaption</b></a> ( const QString & )</div></li>
<li><div class=fn>virtual void <a href="#setIcon"><b>setIcon</b></a> ( const QPixmap & )</div></li>
<li><div class=fn>virtual void <a href="#setIconText"><b>setIconText</b></a> ( const QString & )</div></li>
<li><div class=fn>virtual void <a href="#setMouseTracking"><b>setMouseTracking</b></a> ( bool enable )</div></li>
<li><div class=fn>virtual void <a href="#setFocus"><b>setFocus</b></a> ()</div></li>
<li><div class=fn>void <a href="#clearFocus"><b>clearFocus</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#setUpdatesEnabled"><b>setUpdatesEnabled</b></a> ( bool enable )</div></li>
<li><div class=fn>void <a href="#update"><b>update</b></a> ()</div></li>
<li><div class=fn>void <a href="#update-2"><b>update</b></a> ( int x, int y, int w, int h )</div></li>
<li><div class=fn>void <a href="#update-3"><b>update</b></a> ( const QRect & r )</div></li>
<li><div class=fn>void <a href="#repaint-2"><b>repaint</b></a> ()</div></li>
<li><div class=fn>void <a href="#repaint-3"><b>repaint</b></a> ( bool erase )</div></li>
<li><div class=fn>void <a href="#repaint"><b>repaint</b></a> ( int x, int y, int w, int h, bool erase = TRUE )</div></li>
<li><div class=fn>void <a href="#repaint-4"><b>repaint</b></a> ( const QRect & r, bool erase = TRUE )</div></li>
<li><div class=fn>void <a href="#repaint-5"><b>repaint</b></a> ( const QRegion & reg, bool erase = TRUE )</div></li>
<li><div class=fn>virtual void <a href="#show"><b>show</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#hide"><b>hide</b></a> ()</div></li>
<li><div class=fn>void iconify () <em>(obsolete)</em></div></li>
<li><div class=fn>virtual void <a href="#showMinimized"><b>showMinimized</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#showMaximized"><b>showMaximized</b></a> ()</div></li>
<li><div class=fn>void <a href="#showFullScreen"><b>showFullScreen</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#showNormal"><b>showNormal</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#polish"><b>polish</b></a> ()</div></li>
<li><div class=fn>void <a href="#constPolish"><b>constPolish</b></a> () const</div></li>
<li><div class=fn>bool <a href="#close"><b>close</b></a> ()</div></li>
<li><div class=fn>void <a href="#raise"><b>raise</b></a> ()</div></li>
<li><div class=fn>void <a href="#lower"><b>lower</b></a> ()</div></li>
<li><div class=fn>void <a href="#stackUnder"><b>stackUnder</b></a> ( QWidget * w )</div></li>
<li><div class=fn>virtual void <a href="#move-2"><b>move</b></a> ( int x, int y )</div></li>
<li><div class=fn>void <a href="#move"><b>move</b></a> ( const QPoint & )</div></li>
<li><div class=fn>virtual void <a href="#resize-2"><b>resize</b></a> ( int w, int h )</div></li>
<li><div class=fn>void <a href="#resize"><b>resize</b></a> ( const QSize & )</div></li>
<li><div class=fn>virtual void <a href="#setGeometry-2"><b>setGeometry</b></a> ( int x, int y, int w, int h )</div></li>
<li><div class=fn>virtual void <a href="#setGeometry"><b>setGeometry</b></a> ( const QRect & )</div></li>
</ul>
<h2>Static Public Members</h2>
<ul>
<li><div class=fn>void <a href="#setTabOrder"><b>setTabOrder</b></a> ( QWidget * first, QWidget * second )</div></li>
<li><div class=fn>QWidget * <a href="#mouseGrabber"><b>mouseGrabber</b></a> ()</div></li>
<li><div class=fn>QWidget * <a href="#keyboardGrabber"><b>keyboardGrabber</b></a> ()</div></li>
<li><div class=fn>QWidget * <a href="#find"><b>find</b></a> ( WId id )</div></li>
</ul>
<h2>Properties</h2>
<ul>
<li><div class=fn>bool <a href="#acceptDrops-prop"><b>acceptDrops</b></a> - whether drop events are enabled for this widget</div></li>
<li><div class=fn>bool <a href="#autoMask-prop"><b>autoMask</b></a> - whether the auto mask feature is enabled for the widget</div></li>
<li><div class=fn>QBrush <a href="#backgroundBrush-prop"><b>backgroundBrush</b></a> - the widget's background brush <em>(read only)</em></div></li>
<li><div class=fn>BackgroundMode <a href="#backgroundMode-prop"><b>backgroundMode</b></a> - the color role used for painting the background of the widget</div></li>
<li><div class=fn>BackgroundOrigin <a href="#backgroundOrigin-prop"><b>backgroundOrigin</b></a> - the origin of the widget's background</div></li>
<li><div class=fn>QSize <a href="#baseSize-prop"><b>baseSize</b></a> - the base size of the widget</div></li>
<li><div class=fn>QString <a href="#caption-prop"><b>caption</b></a> - the window caption (title)</div></li>
<li><div class=fn>QRect <a href="#childrenRect-prop"><b>childrenRect</b></a> - the bounding rectangle of the widget's children <em>(read only)</em></div></li>
<li><div class=fn>QRegion <a href="#childrenRegion-prop"><b>childrenRegion</b></a> - the combined region occupied by the widget's children <em>(read only)</em></div></li>
<li><div class=fn>QColorGroup <a href="#colorGroup-prop"><b>colorGroup</b></a> - the current color group of the widget palette <em>(read only)</em></div></li>
<li><div class=fn>QCursor <a href="#cursor-prop"><b>cursor</b></a> - the cursor shape for this widget</div></li>
<li><div class=fn>bool <a href="#customWhatsThis-prop"><b>customWhatsThis</b></a> - whether the widget wants to handle What's This help manually <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#enabled-prop"><b>enabled</b></a> - whether the widget is enabled</div></li>
<li><div class=fn>bool <a href="#focus-prop"><b>focus</b></a> - whether this widget (or its focus proxy) has the keyboard input focus <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#focusEnabled-prop"><b>focusEnabled</b></a> - whether the widget accepts keyboard focus <em>(read only)</em></div></li>
<li><div class=fn>FocusPolicy <a href="#focusPolicy-prop"><b>focusPolicy</b></a> - the way the widget accepts keyboard focus</div></li>
<li><div class=fn>QFont <a href="#font-prop"><b>font</b></a> - the font currently set for the widget</div></li>
<li><div class=fn>QRect <a href="#frameGeometry-prop"><b>frameGeometry</b></a> - geometry of the widget relative to its parent including any window frame <em>(read only)</em></div></li>
<li><div class=fn>QSize <a href="#frameSize-prop"><b>frameSize</b></a> - the size of the widget including any window frame <em>(read only)</em></div></li>
<li><div class=fn>QRect <a href="#geometry-prop"><b>geometry</b></a> - the geometry of the widget relative to its parent and excluding the window frame</div></li>
<li><div class=fn>int <a href="#height-prop"><b>height</b></a> - the height of the widget excluding any window frame <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#hidden-prop"><b>hidden</b></a> - whether the widget is explicitly hidden <em>(read only)</em></div></li>
<li><div class=fn>QPixmap <a href="#icon-prop"><b>icon</b></a> - the widget icon pixmap</div></li>
<li><div class=fn>QString <a href="#iconText-prop"><b>iconText</b></a> - the widget icon text</div></li>
<li><div class=fn>bool <a href="#isActiveWindow-prop"><b>isActiveWindow</b></a> - whether this widget is the active window or a child of it <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#isDesktop-prop"><b>isDesktop</b></a> - whether the widget is a desktop widget <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#isDialog-prop"><b>isDialog</b></a> - whether the widget is a dialog widget <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#isModal-prop"><b>isModal</b></a> - whether the widget is a modal widget <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#isPopup-prop"><b>isPopup</b></a> - whether the widget is a popup widget <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#isTopLevel-prop"><b>isTopLevel</b></a> - whether the widget is a top-level widget <em>(read only)</em></div></li>
<li><div class=fn>int <a href="#maximumHeight-prop"><b>maximumHeight</b></a> - the widget's maximum height</div></li>
<li><div class=fn>QSize <a href="#maximumSize-prop"><b>maximumSize</b></a> - the widget's maximum size</div></li>
<li><div class=fn>int <a href="#maximumWidth-prop"><b>maximumWidth</b></a> - the widget's maximum width</div></li>
<li><div class=fn>QRect <a href="#microFocusHint-prop"><b>microFocusHint</b></a> - the currently set micro focus hint for this widget <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#minimized-prop"><b>minimized</b></a> - whether this widget is minimized (iconified) <em>(read only)</em></div></li>
<li><div class=fn>int <a href="#minimumHeight-prop"><b>minimumHeight</b></a> - the widget's minimum height</div></li>
<li><div class=fn>QSize <a href="#minimumSize-prop"><b>minimumSize</b></a> - the widget's minimum size</div></li>
<li><div class=fn>QSize <a href="#minimumSizeHint-prop"><b>minimumSizeHint</b></a> - the recommended minimum size for the widget <em>(read only)</em></div></li>
<li><div class=fn>int <a href="#minimumWidth-prop"><b>minimumWidth</b></a> - the widget's minimum width</div></li>
<li><div class=fn>bool <a href="#mouseTracking-prop"><b>mouseTracking</b></a> - whether mouse tracking is enabled for this widget</div></li>
<li><div class=fn>bool <a href="#ownCursor-prop"><b>ownCursor</b></a> - whether the widget uses its own cursor <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#ownFont-prop"><b>ownFont</b></a> - whether the widget uses its own font <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#ownPalette-prop"><b>ownPalette</b></a> - whether the widget uses its own palette <em>(read only)</em></div></li>
<li><div class=fn>QPalette <a href="#palette-prop"><b>palette</b></a> - the widget's palette</div></li>
<li><div class=fn>QColor <a href="#paletteBackgroundColor-prop"><b>paletteBackgroundColor</b></a> - the background color of the widget</div></li>
<li><div class=fn>QPixmap <a href="#paletteBackgroundPixmap-prop"><b>paletteBackgroundPixmap</b></a> - the background pixmap of the widget</div></li>
<li><div class=fn>QColor <a href="#paletteForegroundColor-prop"><b>paletteForegroundColor</b></a> - the foreground color of the widget</div></li>
<li><div class=fn>QPoint <a href="#pos-prop"><b>pos</b></a> - the position of the widget in its parent widget</div></li>
<li><div class=fn>QRect <a href="#rect-prop"><b>rect</b></a> - the internal geometry of the widget excluding any window frame <em>(read only)</em></div></li>
<li><div class=fn>QSize <a href="#size-prop"><b>size</b></a> - the size of the widget excluding any window frame</div></li>
<li><div class=fn>QSize <a href="#sizeHint-prop"><b>sizeHint</b></a> - the recommended size for the widget <em>(read only)</em></div></li>
<li><div class=fn>QSize <a href="#sizeIncrement-prop"><b>sizeIncrement</b></a> - the size increment of the widget</div></li>
<li><div class=fn>QSizePolicy <a href="#sizePolicy-prop"><b>sizePolicy</b></a> - the default layout behavior of the widget</div></li>
<li><div class=fn>bool <a href="#underMouse-prop"><b>underMouse</b></a> - whether the widget is under the mouse cursor <em>(read only)</em></div></li>
<li><div class=fn>bool <a href="#updatesEnabled-prop"><b>updatesEnabled</b></a> - whether updates are enabled</div></li>
<li><div class=fn>bool <a href="#visible-prop"><b>visible</b></a> - whether the widget is visible <em>(read only)</em></div></li>
<li><div class=fn>QRect <a href="#visibleRect-prop"><b>visibleRect</b></a> - the currently visible rectangle of the widget <em>(read only)</em></div></li>
<li><div class=fn>int <a href="#width-prop"><b>width</b></a> - the width of the widget excluding any window frame <em>(read only)</em></div></li>
<li><div class=fn>int <a href="#x-prop"><b>x</b></a> - the x coordinate of the widget relative to its parent including any window frame <em>(read only)</em></div></li>
<li><div class=fn>int <a href="#y-prop"><b>y</b></a> - the y coordinate of the widget relative to its parent and including any window frame <em>(read only)</em></div></li>
</ul>
<h2>Protected Members</h2>
<ul>
<li><div class=fn>virtual bool <a href="#event"><b>event</b></a> ( QEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#mousePressEvent"><b>mousePressEvent</b></a> ( QMouseEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#mouseReleaseEvent"><b>mouseReleaseEvent</b></a> ( QMouseEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#mouseDoubleClickEvent"><b>mouseDoubleClickEvent</b></a> ( QMouseEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#mouseMoveEvent"><b>mouseMoveEvent</b></a> ( QMouseEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#wheelEvent"><b>wheelEvent</b></a> ( QWheelEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#keyPressEvent"><b>keyPressEvent</b></a> ( QKeyEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#keyReleaseEvent"><b>keyReleaseEvent</b></a> ( QKeyEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#focusInEvent"><b>focusInEvent</b></a> ( QFocusEvent * )</div></li>
<li><div class=fn>virtual void <a href="#focusOutEvent"><b>focusOutEvent</b></a> ( QFocusEvent * )</div></li>
<li><div class=fn>virtual void <a href="#enterEvent"><b>enterEvent</b></a> ( QEvent * )</div></li>
<li><div class=fn>virtual void <a href="#leaveEvent"><b>leaveEvent</b></a> ( QEvent * )</div></li>
<li><div class=fn>virtual void <a href="#paintEvent"><b>paintEvent</b></a> ( QPaintEvent * )</div></li>
<li><div class=fn>virtual void <a href="#moveEvent"><b>moveEvent</b></a> ( QMoveEvent * )</div></li>
<li><div class=fn>virtual void <a href="#resizeEvent"><b>resizeEvent</b></a> ( QResizeEvent * )</div></li>
<li><div class=fn>virtual void <a href="#closeEvent"><b>closeEvent</b></a> ( QCloseEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#contextMenuEvent"><b>contextMenuEvent</b></a> ( QContextMenuEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#imStartEvent"><b>imStartEvent</b></a> ( QIMEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#imComposeEvent"><b>imComposeEvent</b></a> ( QIMEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#imEndEvent"><b>imEndEvent</b></a> ( QIMEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#tabletEvent"><b>tabletEvent</b></a> ( QTabletEvent * e )</div></li>
<li><div class=fn>virtual void <a href="#dragEnterEvent"><b>dragEnterEvent</b></a> ( QDragEnterEvent * )</div></li>
<li><div class=fn>virtual void <a href="#dragMoveEvent"><b>dragMoveEvent</b></a> ( QDragMoveEvent * )</div></li>
<li><div class=fn>virtual void <a href="#dragLeaveEvent"><b>dragLeaveEvent</b></a> ( QDragLeaveEvent * )</div></li>
<li><div class=fn>virtual void <a href="#dropEvent"><b>dropEvent</b></a> ( QDropEvent * )</div></li>
<li><div class=fn>virtual void <a href="#showEvent"><b>showEvent</b></a> ( QShowEvent * )</div></li>
<li><div class=fn>virtual void <a href="#hideEvent"><b>hideEvent</b></a> ( QHideEvent * )</div></li>
<li><div class=fn>virtual bool <a href="#macEvent"><b>macEvent</b></a> ( MSG * )</div></li>
<li><div class=fn>virtual bool <b>winEvent</b> ( MSG * )</div></li>
<li><div class=fn>virtual bool <b>x11Event</b> ( XEvent * )</div></li>
<li><div class=fn>virtual bool <b>qwsEvent</b> ( QWSEvent * )</div></li>
<li><div class=fn>virtual unsigned char * <b>scanLine</b> ( int ) const</div></li>
<li><div class=fn>virtual int <b>bytesPerLine</b> () const</div></li>
<li><div class=fn>virtual void <a href="#updateMask"><b>updateMask</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#styleChange"><b>styleChange</b></a> ( QStyle & oldStyle )</div></li>
<li><div class=fn>virtual void <a href="#enabledChange"><b>enabledChange</b></a> ( bool oldEnabled )</div></li>
<li><div class=fn>virtual void <a href="#paletteChange"><b>paletteChange</b></a> ( const QPalette & oldPalette )</div></li>
<li><div class=fn>virtual void <a href="#fontChange"><b>fontChange</b></a> ( const QFont & oldFont )</div></li>
<li><div class=fn>virtual void <a href="#windowActivationChange"><b>windowActivationChange</b></a> ( bool oldActive )</div></li>
<li><div class=fn>virtual int <a href="#metric"><b>metric</b></a> ( int m ) const</div></li>
<li><div class=fn>void <a href="#resetInputContext"><b>resetInputContext</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#create"><b>create</b></a> ( WId window = 0, bool initializeWindow = TRUE, bool destroyOldWindow = TRUE )</div></li>
<li><div class=fn>virtual void <a href="#destroy"><b>destroy</b></a> ( bool destroyWindow = TRUE, bool destroySubWindows = TRUE )</div></li>
<li><div class=fn>WFlags <a href="#getWFlags"><b>getWFlags</b></a> () const</div></li>
<li><div class=fn>virtual void <a href="#setWFlags"><b>setWFlags</b></a> ( WFlags f )</div></li>
<li><div class=fn>void <a href="#clearWFlags"><b>clearWFlags</b></a> ( WFlags f )</div></li>
<li><div class=fn>virtual bool <a href="#focusNextPrevChild"><b>focusNextPrevChild</b></a> ( bool next )</div></li>
<li><div class=fn>QFocusData * <a href="#focusData"><b>focusData</b></a> ()</div></li>
<li><div class=fn>virtual void <a href="#setKeyCompression"><b>setKeyCompression</b></a> ( bool compress )</div></li>
<li><div class=fn>virtual void <a href="#setMicroFocusHint"><b>setMicroFocusHint</b></a> ( int x, int y, int width, int height, bool text = TRUE, QFont * f = 0 )</div></li>
<li><div class=fn>void <b>dirtyClippedRegion</b> ( bool )</div></li>
<li><div class=fn>bool <b>isClippedRegionDirty</b> ()</div></li>
</ul>
<hr><a name="details"></a><h2>Detailed Description</h2>
The QWidget class is the base class of all user interface objects.
<p>
<p> The widget is the atom of the user interface: it receives mouse,
keyboard and other events from the window system, and paints a
representation of itself on the screen. Every widget is
rectangular, and they are sorted in a Z-order. A widget is clipped
by its parent and by the widgets in front of it.
<p> A widget that isn't embedded in a parent widget is called a
top-level widget. Usually, top-level widgets are windows with a
frame and a title bar (though it is also possible to create top
level widgets without such decoration by the use of <a href="qt.html#WidgetFlags-enum">widget flags</a>). In Qt, <a href="qmainwindow.html">QMainWindow</a> and
the various subclasses of <a href="qdialog.html">QDialog</a> are the most common top-level
windows.
<p> A widget without a parent widget is always a top-level widget.
<p> Non-top-level widgets are child widgets. These are child
windows in their parent widgets. You usually cannot distinguish a
child widget from its parent visually. Most other widgets in Qt are
useful only as child widgets. (You can make a e.g. button into a
top-level widget, but most people prefer to put their buttons in
e.g. dialogs.)
<p> QWidget has many member functions, but some of them have little
direct functionality: for example, QWidget it has a font property,
but never uses this itself. There are many subclasses which provide
real functionality, as diverse as <a href="qpushbutton.html">QPushButton</a>, <a href="qlistbox.html">QListBox</a> and
<a href="qtabdialog.html">QTabDialog</a>.
<p> <h3> Groups of functions:
<ul>
</h3>
<a name="1"></a><p> <li> Window functions:
<a href="#show">show</a>(),
<a href="#hide">hide</a>(),
<a href="#raise">raise</a>(),
<a href="#lower">lower</a>(),
<a href="#close">close</a>().
<p> <li> Top level windows:
<a href="#caption">caption</a>(),
<a href="#setCaption">setCaption</a>(),
<a href="#icon">icon</a>(),
<a href="#setIcon">setIcon</a>(),
<a href="#iconText">iconText</a>(),
<a href="#setIconText">setIconText</a>(),
<a href="#isActiveWindow">isActiveWindow</a>(),
<a href="#setActiveWindow">setActiveWindow</a>(),
<a href="#showMinimized">showMinimized</a>().
<a href="#showMaximized">showMaximized</a>(),
<a href="#showFullScreen">showFullScreen</a>(),
<a href="#showNormal">showNormal</a>().
<p> <li> Window contents:
<a href="#update">update</a>(),
<a href="#repaint">repaint</a>(),
<a href="#erase">erase</a>(),
<a href="#scroll">scroll</a>(),
<a href="#updateMask">updateMask</a>().
<p> <li> Geometry:
<a href="#pos">pos</a>(),
<a href="#size">size</a>(),
<a href="#rect">rect</a>(),
<a href="#x">x</a>(),
<a href="#y">y</a>(),
<a href="#width">width</a>(),
<a href="#height">height</a>(),
<a href="#sizePolicy">sizePolicy</a>(),
<a href="#setSizePolicy">setSizePolicy</a>(),
<a href="#sizeHint">sizeHint</a>(),
<a href="#updateGeometry">updateGeometry</a>(),
<a href="#layout">layout</a>(),
<a href="#move">move</a>(),
<a href="#resize">resize</a>(),
<a href="#setGeometry">setGeometry</a>(),
<a href="#frameGeometry">frameGeometry</a>(),
<a href="#geometry">geometry</a>(),
<a href="#childrenRect">childrenRect</a>(),
<a href="#adjustSize">adjustSize</a>(),
<a href="#mapFromGlobal">mapFromGlobal</a>(),
<a href="#mapFromParent">mapFromParent</a>()
<a href="#mapToGlobal">mapToGlobal</a>(),
<a href="#mapToParent">mapToParent</a>(),
<a href="#maximumSize">maximumSize</a>(),
<a href="#minimumSize">minimumSize</a>(),
<a href="#sizeIncrement">sizeIncrement</a>(),
<a href="#setMaximumSize">setMaximumSize</a>(),
<a href="#setMinimumSize">setMinimumSize</a>(),
<a href="#setSizeIncrement">setSizeIncrement</a>(),
<a href="#setBaseSize">setBaseSize</a>(),
<a href="#setFixedSize">setFixedSize</a>()
<p> <li> Mode:
<a href="#isVisible">isVisible</a>(),
<a href="#isVisibleTo">isVisibleTo</a>(),
<a href="#visibleRect">visibleRect</a>(),
<a href="#isMinimized">isMinimized</a>(),
<a href="#isDesktop">isDesktop</a>(),
<a href="#isEnabled">isEnabled</a>(),
<a href="#isEnabledTo">isEnabledTo</a>(),
<a href="#isModal">isModal</a>(),
<a href="#isPopup">isPopup</a>(),
<a href="#isTopLevel">isTopLevel</a>(),
<a href="#setEnabled">setEnabled</a>(),
<a href="#hasMouseTracking">hasMouseTracking</a>(),
<a href="#setMouseTracking">setMouseTracking</a>(),
<a href="#isUpdatesEnabled">isUpdatesEnabled</a>(),
<a href="#setUpdatesEnabled">setUpdatesEnabled</a>(),
<p> <li> Look and feel:
<a href="#style">style</a>(),
<a href="#setStyle">setStyle</a>(),
<a href="#cursor">cursor</a>(),
<a href="#setCursor">setCursor</a>()
<a href="#font">font</a>(),
<a href="#setFont">setFont</a>(),
<a href="#palette">palette</a>(),
<a href="#setPalette">setPalette</a>(),
<a href="#backgroundMode">backgroundMode</a>(),
<a href="#setBackgroundMode">setBackgroundMode</a>(),
<a href="#colorGroup">colorGroup</a>(),
<a href="#fontMetrics">fontMetrics</a>(),
<a href="#fontInfo">fontInfo</a>().
<p> <li> <a href="focus.html#keyboard-focus">Keyboard focus</a> functions:
<a href="#isFocusEnabled">isFocusEnabled</a>(),
<a href="#setFocusPolicy">setFocusPolicy</a>(),
<a href="#focusPolicy">focusPolicy</a>(),
<a href="#hasFocus">hasFocus</a>(),
<a href="#setFocus">setFocus</a>(),
<a href="#clearFocus">clearFocus</a>(),
<a href="#setTabOrder">setTabOrder</a>(),
<a href="#setFocusProxy">setFocusProxy</a>().
<p> <li> Mouse and keyboard grabbing:
<a href="#grabMouse">grabMouse</a>(),
<a href="#releaseMouse">releaseMouse</a>(),
<a href="#grabKeyboard">grabKeyboard</a>(),
<a href="#releaseKeyboard">releaseKeyboard</a>(),
<a href="#mouseGrabber">mouseGrabber</a>(),
<a href="#keyboardGrabber">keyboardGrabber</a>().
<p> <li> Event handlers:
<a href="#event">event</a>(),
<a href="#mousePressEvent">mousePressEvent</a>(),
<a href="#mouseReleaseEvent">mouseReleaseEvent</a>(),
<a href="#mouseDoubleClickEvent">mouseDoubleClickEvent</a>(),
<a href="#mouseMoveEvent">mouseMoveEvent</a>(),
<a href="#keyPressEvent">keyPressEvent</a>(),
<a href="#keyReleaseEvent">keyReleaseEvent</a>(),
<a href="#focusInEvent">focusInEvent</a>(),
<a href="#focusOutEvent">focusOutEvent</a>(),
<a href="#wheelEvent">wheelEvent</a>(),
<a href="#enterEvent">enterEvent</a>(),
<a href="#leaveEvent">leaveEvent</a>(),
<a href="#paintEvent">paintEvent</a>(),
<a href="#moveEvent">moveEvent</a>(),
<a href="#resizeEvent">resizeEvent</a>(),
<a href="#closeEvent">closeEvent</a>(),
<a href="#dragEnterEvent">dragEnterEvent</a>(),
<a href="#dragMoveEvent">dragMoveEvent</a>(),
<a href="#dragLeaveEvent">dragLeaveEvent</a>(),
<a href="#dropEvent">dropEvent</a>(),
<a href="qobject.html#childEvent">childEvent</a>(),
<a href="#showEvent">showEvent</a>(),
<a href="#hideEvent">hideEvent</a>(),
<a href="qobject.html#customEvent">customEvent</a>().
<p> <li> Change handlers:
<a href="#enabledChange">enabledChange</a>(),
<a href="#fontChange">fontChange</a>(),
<a href="#paletteChange">paletteChange</a>(),
<a href="#styleChange">styleChange</a>(),
<a href="#windowActivationChange">windowActivationChange</a>().
<p> <li> System functions:
<a href="#parentWidget">parentWidget</a>(),
<a href="#topLevelWidget">topLevelWidget</a>(),
<a href="#reparent">reparent</a>(),
<a href="#polish">polish</a>(),
<a href="#winId">winId</a>(),
<a href="#find">find</a>(),
<a href="#metric">metric</a>().
<p> <li> Internal kernel functions:
<a href="#focusNextPrevChild">focusNextPrevChild</a>(),
wmapper(),
<a href="#clearWFlags">clearWFlags</a>(),
<a href="#getWFlags">getWFlags</a>(),
<a href="#setWFlags">setWFlags</a>(),
<a href="#testWFlags">testWFlags</a>().
<p> <li> What's this help:
<a href="#customWhatsThis">customWhatsThis</a>()
</ul>
<p> Every widget's constructor accepts two or three standard arguments:
<ul>
<li> <tt>QWidget *parent = 0</tt> is the parent of the new widget.
If it is 0 (the default), the new widget will be a top-level window.
If not, it will be a child of <em>parent</em>, and be constrained by <em>parent</em>'s geometry (Unless you specify <a href="qt.html#WidgetFlags-enum">WType_TopLevel</a> as
widget flag).
<li> <tt>const char *name = 0</tt> is the widget name of the new
widget. You can access it using <a href="qobject.html#name">name</a>(). The widget name is little
used by programmers but is quite useful with GUI builders such as
<em>Qt Designer</em> (you can name a widget in the builder, and <a href="qobject.html#connect">connect</a>() to
it using the name in your code). The <a href="qobject.html#dumpObjectTree">dumpObjectTree</a>() debugging
function also uses it.
<li> <tt>WFlags f = 0</tt> (where available) sets the
<a href="qt.html#WidgetFlags">widget flags</a>; the default is good
for almost all widgets, but to get e.g. top-level widgets without a
window system frame, you must use special flags.
</ul>
<p> The tictac/tictac.cpp example program is good example of a simple
widget. It contains a few event handlers (as all widgets must), a
few custom routines that are peculiar to it (as all useful widgets
do), and has a few children and connections. Everything it does
is done in response to an event: this is by far the most common way
to design GUI applications.
<p> You will need to supply the content for your widgets yourself, but
here is a brief run-down of the events, starting with the most common
ones:
<p> <ul>
<p> <li> <a href="#paintEvent">paintEvent</a>() - called whenever the widget needs to be
repainted. Every widget which displays output must implement it,
and it is wise <em>not</em> to paint on the screen outside
paintEvent().
<p> <li> <a href="#resizeEvent">resizeEvent</a>() - called when the widget has been resized.
<p> <li> <a href="#mousePressEvent">mousePressEvent</a>() - called when a mouse button is pressed.
There are six mouse-related events, but mouse press and mouse release
events are by far the most important. A widget receives mouse press
events when the widget is inside it, or when it has grabbed the
mouse using <a href="#grabMouse">grabMouse</a>().
<p> <li> <a href="#mouseReleaseEvent">mouseReleaseEvent</a>() - called when a mouse button is released.
A widget receives mouse release events when it has received the
corresponding mouse press event. This means that if the user
presses the mouse inside <em>your</em> widget, then drags the mouse to
somewhere else, then releases, <em>your</em> widget receives the release
event. There is one exception, however: if a popup menu appears
while the mouse button is held down, that popup steals the mouse
events at once.
<p> <li> <a href="#mouseDoubleClickEvent">mouseDoubleClickEvent</a>() - not quite as obvious as it might seem.
If the user double-clicks, the widget receives a mouse press event
(perhaps a mouse move event or two if they don't hold the mouse
quite steady), a mouse release event and finally this event. It is
<em>not possible</em> to distinguish a click from a double click until you've
seen whether the second click arrives. (This is one reason why most GUI
books recommend that double clicks be an extension of single clicks,
rather than trigger a different action.)
</ul>
<p> If your widget only contains child widgets, you probably do not need to
implement any event handlers.
<p> Widgets that accept keyboard input need to reimplement a few more
event handlers:
<p> <ul>
<p> <li> <a href="#keyPressEvent">keyPressEvent</a>() - called whenever a key is pressed, and again
when a key has been held down long enough for it to auto-repeat.
Note that the Tab and Shift+Tab keys are only passed to the widget
if they are not used by the focus-change mechanisms. To force those
keys to be processed by your widget, you must reimplement
<a href="#event">QWidget::event</a>().
<p> <li> <a href="#focusInEvent">focusInEvent</a>() - called when the widget gains keyboard focus
(assuming you have called <a href="#setFocusPolicy">setFocusPolicy</a>(), of course). Well
written widgets indicate that they own the keyboard focus in a clear
but discreet way.
<p> <li> <a href="#focusOutEvent">focusOutEvent</a>() - called when the widget loses keyboard
focus.
</ul>
<p> Some widgets will need to reimplement some more obscure event
handlers, too:
<p> <ul>
<p> <li> <a href="#mouseMoveEvent">mouseMoveEvent</a>() - called whenever the mouse moves while a
button is held down. This is useful for e.g. dragging. If you call
<a href="#setMouseTracking">setMouseTracking</a>(TRUE), you get mouse move events even when no
buttons are held down. (Note that applications which make use of
mouse tracking are often not very useful on low-bandwidth X
connections.) (See also the <a href="dnd.html">drag and drop</a>
information.)
<p> <li> <a href="#keyReleaseEvent">keyReleaseEvent</a>() - called whenever a key is released, and also
while it is held down if the key is auto-repeating. In that case
the widget receives a key release event and immediately a key press
event for every repeat. Note that the Tab and Shift+Tab keys are
only passed to the widget if they are not used by the focus-change
mechanisms. To force those keys to be processed by your widget, you
must reimplement <a href="#event">QWidget::event</a>().
<p> <li> <a href="#wheelEvent">wheelEvent</a>() -- called whenever the user turns the mouse wheel
while the widget has the focus.
<p> <li> <a href="#enterEvent">enterEvent</a>() - called when the mouse enters the widget's screen
space. (This excludes screen space owned by any children of the
widget.)
<p> <li> <a href="#leaveEvent">leaveEvent</a>() - called when the mouse leaves the widget's screen
space.
<p> <li> <a href="#moveEvent">moveEvent</a>() - called when the widget has been moved relative to its
parent.
<p> <li> <a href="#closeEvent">closeEvent</a>() - called when the user closes the widget (or when
<a href="#close">close</a>() is called).
</ul>
<p> There are also some <em>really</em> obscure events. They are listed in
qevent.h and you need to reimplement <a href="#event">event</a>() to handle them. The
default implementation of event() handles Tab and Shift+Tab (to move
the keyboard focus), and passes on most other events to one of the
more specialized handlers above.
<p> When implementing a widget, there are a few more things to look out
for.
<p> <ul>
<p> <li> In the constructor, be sure to set up your member variables
early on, before there's any chance that you might receive an event.
<p> <li> It is almost always useful to reimplement <a href="#sizeHint">sizeHint</a>() and to set
the correct size policy with <a href="#setSizePolicy">setSizePolicy</a>(), so users of your class
can set up layout management more easily. A size policy lets you
supply good defaults for the layout management handling, so that
other widgets can contain and manage yours easily. sizeHint()
indicates a "good" size for the widget.
<p> <li> If your widget is a top-level window, <a href="#setCaption">setCaption</a>() and <a href="#setIcon">setIcon</a>() set
the title bar and icon respectively.
<p> </ul>
<p> <p>See also <a href="qevent.html">QEvent</a>, <a href="qpainter.html">QPainter</a>, <a href="qgridlayout.html">QGridLayout</a>, <a href="qboxlayout.html">QBoxLayout</a> and <a href="abstractwidgets.html">Abstract Widget Classes</a>.
<hr><h2>Member Type Documentation</h2>
<h3 class=fn><a name="BackgroundOrigin-enum"></a>QWidget::BackgroundOrigin</h3>
<p> This enum defines the origin used to draw a widget's background
pixmap.
<p> The pixmap is drawn using the:
<ul>
<li><tt>QWidget::WidgetOrigin</tt> - widget's coordinate system.
<li><tt>QWidget::ParentOrigin</tt> - parent's coordinate system.
<li><tt>QWidget::WindowOrigin</tt> - toplevel window's coordinate system.
</ul>
<h3 class=fn><a name="FocusPolicy-enum"></a>QWidget::FocusPolicy</h3>
<p> This enum type defines the various policies a widget can have with
respect to acquiring <a href="focus.html#keyboard-focus">keyboard focus</a>.
<p> The <em>policy</em> can be:
<ul>
<li><tt>QWidget::TabFocus</tt> - the widget accepts focus by tabbing.
<li><tt>QWidget::ClickFocus</tt> - the widget accepts focus by clicking.
<li><tt>QWidget::StrongFocus</tt> - the widget accepts focus by both tabbing
and clicking.
<li><tt>QWidget::WheelFocus</tt> - like StrongFocus plus the widget accepts
focus by using the mouse wheel.
<li><tt>QWidget::NoFocus</tt> - the widget does not accept focus.
</ul><p>
<hr><h2>Member Function Documentation</h2>
<h3 class=fn><a name="QWidget"></a>QWidget::QWidget ( <a href="qwidget.html">QWidget</a> * parent = 0, const char * name = 0, WFlags f = 0 )
</h3>
Constructs a widget which is a child of <em>parent</em>, with the name <em>name</em> and
<a href="qt.html#WidgetFlags">widget flags</a> set to <em>f</em>.
<p> If <em>parent</em> is 0, the new widget becomes a top-level window. If <em>parent</em> is another widget, this widget becomes a child window inside
<em>parent</em>. The new widget is deleted when its <em>parent</em> is deleted.
<p> The <em>name</em> is sent to the <a href="qobject.html">QObject</a> constructor.
<p> The widget flags argument, <em>f</em>, is normally 0, but it can be set to
customize the window frame of a top-level widget (i.e. <em>parent</em> must be
0). To customize the frame, set the <a href="qt.html#WidgetFlags-enum">WStyle_Customize</a> flag OR'ed with
any of the Qt::WidgetFlags.
<p> If you add a child widget to an already visible widget you must
explicitly show the child to make it visible.
<p> Note that the X11 version of Qt may not be able to deliver all
combinations of style flags on all systems. This is because on X11,
Qt can only ask the window manager, and the window manager can
override the application's settings. On Windows, Qt can set
whatever flags you want.
<p> Example:
<pre>
<a href="qlabel.html">QLabel</a> *splashScreen = new <a href="qlabel.html">QLabel</a>( 0, "mySplashScreen",
WStyle_Customize | WStyle_NoBorder |
<a href="qt.html#WidgetFlags-enum">WStyle_Tool</a> );
</pre>
<h3 class=fn><a name="~QWidget"></a>QWidget::~QWidget ()
</h3>
Destroys the widget.
<p> All this widget's children are deleted first.
The application exits if this widget is the main widget.
<h3 class=fn>bool <a name="acceptDrops"></a>QWidget::acceptDrops () const
</h3><p>Returns TRUE if drop events are enabled for this widget; otherwise returns FALSE.
See the <a href="qwidget.html#acceptDrops-prop">"acceptDrops"</a> property for details.
<h3 class=fn>void <a name="adjustSize"></a>QWidget::adjustSize ()<tt> [virtual]</tt>
</h3>
Adjusts the size of the widget to fit the contents.
<p> Uses <a href="#sizeHint">sizeHint</a>() if valid (i.e if the size hint's width and height are
equal to or greater than 0), otherwise sets the size to the children
rectangle (the union of all child widget geometries).
<p> <p>See also <a href="#sizeHint-prop">sizeHint</a> and <a href="#childrenRect-prop">childrenRect</a>.
<p>Example: <a href="xform-example.html#x122">xform/xform.cpp</a>.
<p>Reimplemented in <a href="qmessagebox.html#adjustSize">QMessageBox</a>.
<h3 class=fn>bool <a name="autoMask"></a>QWidget::autoMask () const
</h3><p>Returns TRUE if the auto mask feature is enabled for the widget; otherwise returns FALSE.
See the <a href="qwidget.html#autoMask-prop">"autoMask"</a> property for details.
<h3 class=fn>const <a href="qbrush.html">QBrush</a> & <a name="backgroundBrush"></a>QWidget::backgroundBrush () const
</h3><p>Returns the widget's background brush.
See the <a href="qwidget.html#backgroundBrush-prop">"backgroundBrush"</a> property for details.
<h3 class=fn>const <a href="qcolor.html">QColor</a> & <a name="backgroundColor"></a>QWidget::backgroundColor () const
</h3><b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
Use <a href="#paletteBackgroundColor">paletteBackgroundColor</a>() or <a href="#eraseColor">eraseColor</a>() instead.
<h3 class=fn><a href="qt.html#BackgroundMode-enum">BackgroundMode</a> <a name="backgroundMode"></a>QWidget::backgroundMode () const
</h3><p>Returns the color role used for painting the background of the widget.
See the <a href="qwidget.html#backgroundMode-prop">"backgroundMode"</a> property for details.
<h3 class=fn><a href="qwidget.html#BackgroundOrigin-enum">BackgroundOrigin</a> <a name="backgroundOrigin"></a>QWidget::backgroundOrigin () const
</h3><p>Returns the origin of the widget's background.
See the <a href="qwidget.html#backgroundOrigin-prop">"backgroundOrigin"</a> property for details.
<h3 class=fn>const <a href="qpixmap.html">QPixmap</a> * <a name="backgroundPixmap"></a>QWidget::backgroundPixmap () const
</h3><b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
Use <a href="#paletteBackgroundPixmap">paletteBackgroundPixmap</a>() or <a href="#erasePixmap">erasePixmap</a>() instead.
<p>Examples: <a href="themes-example.html#x328">themes/metal.cpp</a> and <a href="themes-example.html#x273">themes/wood.cpp</a>.
<h3 class=fn><a href="qsize.html">QSize</a> <a name="baseSize"></a>QWidget::baseSize () const
</h3><p>Returns the base size of the widget.
See the <a href="qwidget.html#baseSize-prop">"baseSize"</a> property for details.
<h3 class=fn><a href="qstring.html">QString</a> <a name="caption"></a>QWidget::caption () const
</h3><p>Returns the window caption (title).
See the <a href="qwidget.html#caption-prop">"caption"</a> property for details.
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="childAt"></a>QWidget::childAt ( int x, int y, bool includeThis = FALSE ) const
</h3> Returns the visible child widget at pixel position <em>(x, y)</em> in
the widget's own coordinate system.
<p> If <em>includeThis</em> is TRUE, and there is no child visible at <em>(x, y)</em>, the widget itself is returned.
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="childAt-2"></a>QWidget::childAt ( const <a href="qpoint.html">QPoint</a> & p, bool includeThis = FALSE ) const
</h3>This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Returns the visible child widget at point <em>p</em> in
the widget's own coordinate system.
<p> If <em>includeThis</em> is TRUE, and there is no child visible at <em>p</em>, the widget itself is returned.
<p>
<h3 class=fn><a href="qrect.html">QRect</a> <a name="childrenRect"></a>QWidget::childrenRect () const
</h3><p>Returns the bounding rectangle of the widget's children.
See the <a href="qwidget.html#childrenRect-prop">"childrenRect"</a> property for details.
<h3 class=fn><a href="qregion.html">QRegion</a> <a name="childrenRegion"></a>QWidget::childrenRegion () const
</h3><p>Returns the combined region occupied by the widget's children.
See the <a href="qwidget.html#childrenRegion-prop">"childrenRegion"</a> property for details.
<h3 class=fn>void <a name="clearFocus"></a>QWidget::clearFocus ()<tt> [slot]</tt>
</h3>
Takes keyboard input focus from the widget.
<p> If the widget has active focus, a <a href="#focusOutEvent">focus out
event</a> is sent to this widget to tell it that it is about to
lose the focus.
<p> This widget must enable focus setting in order to get the keyboard input
focus, i.e. it must call <a href="#setFocusPolicy">setFocusPolicy</a>().
<p> <p>See also <a href="#focus-prop">focus</a>, <a href="#setFocus">setFocus</a>(), <a href="#focusInEvent">focusInEvent</a>(), <a href="#focusOutEvent">focusOutEvent</a>(), <a href="#focusPolicy-prop">focusPolicy</a> and <a href="qapplication.html#focusWidget">QApplication::focusWidget</a>().
<h3 class=fn>void <a name="clearMask"></a>QWidget::clearMask ()
</h3>
Removes any mask set by <a href="#setMask">setMask</a>().
<p> <p>See also <a href="#setMask">setMask</a>().
<h3 class=fn>void <a name="clearWFlags"></a>QWidget::clearWFlags ( WFlags f )<tt> [protected]</tt>
</h3>
<p> Clears the <a href="qt.html#WidgetFlags">widget flags</a> <em>f</em>.
<p> Widget flags are a combination of <a href="qt.html#WidgetFlags-enum">Qt::WidgetFlags</a>.
<p> <p>See also <a href="#testWFlags">testWFlags</a>(), <a href="#getWFlags">getWFlags</a>() and <a href="#setWFlags">setWFlags</a>().
<h3 class=fn>bool <a name="close"></a>QWidget::close ()<tt> [slot]</tt>
</h3>
<p> Closes this widget. Returns TRUE if the widget was closed; otherwise
returns FALSE.
<p> First it sends the widget a <a href="qcloseevent.html">QCloseEvent</a>. The widget is <a href="#hide">hidden</a> if it <a href="qcloseevent.html#accept">accepts</a> the
close event. The default implementation of <a href="#closeEvent">QWidget::closeEvent</a>()
accepts the close event.
<p> The <a href="qapplication.html#lastWindowClosed">QApplication::lastWindowClosed</a>() signal is emitted when the last
visible top level widget is closed.
<p>
<p>Examples: <a href="mdi-example.html#x1180">mdi/application.cpp</a> and <a href="popup-example.html#x888">popup/popup.cpp</a>.
<h3 class=fn>bool <a name="close-2"></a>QWidget::close ( bool alsoDelete )<tt> [virtual]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Closes this widget. Returns TRUE if the widget was closed; otherwise
returns FALSE.
<p> If <em>alsoDelete</em> is TRUE or the widget has the <a href="qt.html#WidgetFlags-enum">WDestructiveClose</a>
widget flag, the widget is also deleted. The widget can prevent
itself from being closed by rejecting the <a href="qcloseevent.html">QCloseEvent</a> it gets.
<p> The <a href="qapplication.html#lastWindowClosed">QApplication::lastWindowClosed</a>() signal is emitted when the last
visible top level widget is closed.
<p> Note that closing the <a href="qapplication.html#mainWidget">QApplication::mainWidget</a>() terminates the
application.
<p> <p>See also <a href="#closeEvent">closeEvent</a>(), <a href="qcloseevent.html">QCloseEvent</a>, <a href="#hide">hide</a>(), <a href="qapplication.html#quit">QApplication::quit</a>(), <a href="qapplication.html#setMainWidget">QApplication::setMainWidget</a>() and <a href="qapplication.html#lastWindowClosed">QApplication::lastWindowClosed</a>().
<h3 class=fn>void <a name="closeEvent"></a>QWidget::closeEvent ( <a href="qcloseevent.html">QCloseEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive widget close events.
<p> The default implementation calls e->accept(), which hides this widget.
See the <a href="qcloseevent.html">QCloseEvent</a> documentation for more details.
<p> <p>See also <a href="#event">event</a>(), <a href="#hide">hide</a>(), <a href="#close">close</a>() and <a href="qcloseevent.html">QCloseEvent</a>.
<p>Examples: <a href="qaction-application-example.html#x2048">action/application.cpp</a>, <a href="simple-application-example.html#x1947">application/application.cpp</a>, <a href="i18n-example.html#x1362">i18n/mywidget.cpp</a>, <a href="popup-example.html#x889">popup/popup.cpp</a> and <a href="qwerty-example.html#x665">qwerty/qwerty.cpp</a>.
<h3 class=fn>const <a href="qcolorgroup.html">QColorGroup</a> & <a name="colorGroup"></a>QWidget::colorGroup () const
</h3><p>Returns the current color group of the widget palette.
See the <a href="qwidget.html#colorGroup-prop">"colorGroup"</a> property for details.
<h3 class=fn>void <a name="constPolish"></a>QWidget::constPolish () const<tt> [slot]</tt>
</h3>
<p> Ensures that the widget is properly initialized by calling <a href="#polish">polish</a>().
<p> Call <a href="#constPolish">constPolish</a>() from functions like <a href="#sizeHint">sizeHint</a>() that depends on
the widget being initialized, and that may be called before <a href="#show">show</a>().
<p> <b>Warning:</b> Do not call constPolish() on a widget from inside that
widget's constructor.
<p> <p>See also <a href="#polish">polish</a>().
<h3 class=fn>void <a name="contextMenuEvent"></a>QWidget::contextMenuEvent ( <a href="qcontextmenuevent.html">QContextMenuEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive widget context menu events.
<p> The default implementation calls e->ignore(), which rejects the context
event.
See the <a href="qcontextmenuevent.html">QContextMenuEvent</a> documentation for more details.
<p> <p>See also <a href="#event">event</a>() and <a href="qcontextmenuevent.html">QContextMenuEvent</a>.
<h3 class=fn>void <a name="create"></a>QWidget::create ( WId window = 0, bool initializeWindow = TRUE, bool destroyOldWindow = TRUE )<tt> [virtual protected]</tt>
</h3>
Creates a new widget window if <em>window</em> is null, otherwise sets the
widget's window to <em>window</em>.
<p> Initializes the window (sets the geometry etc.) if <em>initializeWindow</em>
is TRUE. If <em>initializeWindow</em> is FALSE, no initialization is
performed. This parameter makes only sense if <em>window</em> is a valid
window.
<p> Destroys the old window if <em>destroyOldWindow</em> is TRUE. If <em>destroyOldWindow</em> is FALSE, you are responsible for destroying
the window yourself (using platform native code).
<p> The QWidget constructor calls <a href="#create">create</a>(0,TRUE,TRUE) to create a window for
this widget.
<h3 class=fn>const <a href="qcursor.html">QCursor</a> & <a name="cursor"></a>QWidget::cursor () const
</h3><p>Returns the cursor shape for this widget.
See the <a href="qwidget.html#cursor-prop">"cursor"</a> property for details.
<h3 class=fn>bool <a name="customWhatsThis"></a>QWidget::customWhatsThis () const<tt> [virtual]</tt>
</h3><p>Returns TRUE if the widget wants to handle What's This help manually; otherwise returns FALSE.
See the <a href="qwidget.html#customWhatsThis-prop">"customWhatsThis"</a> property for details.
<h3 class=fn>void <a name="destroy"></a>QWidget::destroy ( bool destroyWindow = TRUE, bool destroySubWindows = TRUE )<tt> [virtual protected]</tt>
</h3>
Frees up window system resources.
Destroys the widget window if <em>destroyWindow</em> is TRUE.
<p> <a href="#destroy">destroy</a>() calls itself recursively for all the child widgets,
passing <em>destroySubWindows</em> for the <em>destroyWindow</em> parameter.
To have more control over destruction of subwidgets,
destroy subwidgets selectively first.
<p> This function is usually called from the QWidget destructor.
<h3 class=fn>void <a name="dragEnterEvent"></a>QWidget::dragEnterEvent ( <a href="qdragenterevent.html">QDragEnterEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler is called when a drag is in
progress and the mouse enters this widget.
<p> See the <a href="dnd.html">Drag-and-drop documentation</a> for
an overview of how to provide drag-and-drop in your application.
<p> <p>See also <a href="qtextdrag.html">QTextDrag</a>, <a href="qimagedrag.html">QImageDrag</a> and <a href="qdragenterevent.html">QDragEnterEvent</a>.
<p>Example: <a href="simple_dd-example.html#x2500">iconview/simple_dd/main.cpp</a>.
<h3 class=fn>void <a name="dragLeaveEvent"></a>QWidget::dragLeaveEvent ( <a href="qdragleaveevent.html">QDragLeaveEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler is called when a drag is in
progress and the mouse leaves this widget.
<p> See the <a href="dnd.html">Drag-and-drop documentation</a> for
an overview of how to provide drag-and-drop in your application.
<p> <p>See also <a href="qtextdrag.html">QTextDrag</a>, <a href="qimagedrag.html">QImageDrag</a> and <a href="qdragleaveevent.html">QDragLeaveEvent</a>.
<h3 class=fn>void <a name="dragMoveEvent"></a>QWidget::dragMoveEvent ( <a href="qdragmoveevent.html">QDragMoveEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler is called when a drag is in
progress and the mouse enters this widget, and whenever it moves
within the widget.
<p> See the <a href="dnd.html">Drag-and-drop documentation</a> for
an overview of how to provide drag-and-drop in your application.
<p> <p>See also <a href="qtextdrag.html">QTextDrag</a>, <a href="qimagedrag.html">QImageDrag</a> and <a href="qdragmoveevent.html">QDragMoveEvent</a>.
<h3 class=fn>void <a name="drawText"></a>QWidget::drawText ( int x, int y, const <a href="qstring.html">QString</a> & str )
</h3>
Draws the string <em>str</em> at position <em>(x, y)</em>.
<p> The <em>y</em> position is the base line position of the text. The text is
drawn using the default font and the default foreground color.
<p> This function is provided for convenience. You will generally get
more flexible results and often higher speed by using a a <a href="qpainter.html">painter</a> instead.
<p> <p>See also <a href="#font-prop">font</a>, <a href="#foregroundColor">foregroundColor</a>() and <a href="qpainter.html#drawText">QPainter::drawText</a>().
<h3 class=fn>void <a name="drawText-2"></a>QWidget::drawText ( const <a href="qpoint.html">QPoint</a> & pos, const <a href="qstring.html">QString</a> & str )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Draws the string <em>str</em> at position <em>pos</em>.
<h3 class=fn>void <a name="dropEvent"></a>QWidget::dropEvent ( <a href="qdropevent.html">QDropEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler is called when the drag is
dropped on this widget.
<p> See the <a href="dnd.html">Drag-and-drop documentation</a> for
an overview of how to provide drag-and-drop in your application.
<p> <p>See also <a href="qtextdrag.html">QTextDrag</a>, <a href="qimagedrag.html">QImageDrag</a> and <a href="qdropevent.html">QDropEvent</a>.
<p>Example: <a href="simple_dd-example.html#x2501">iconview/simple_dd/main.cpp</a>.
<h3 class=fn>void <a name="enabledChange"></a>QWidget::enabledChange ( bool oldEnabled )<tt> [virtual protected]</tt>
</h3>
<p> This virtual function is called from <a href="#setEnabled">setEnabled</a>(). <em>oldEnabled</em> is the
previous setting; you can get the new setting from <a href="#isEnabled">isEnabled</a>().
<p> Reimplement this function if your widget needs to know when it becomes
enabled or disabled. You will almost certainly need to update the widget
using <a href="#update">update</a>().
<p> The default implementation repaints the visible part of the widget.
<p> <p>See also <a href="#enabled-prop">enabled</a>, <a href="#enabled-prop">enabled</a>, <a href="#repaint">repaint</a>(), <a href="#update">update</a>() and <a href="#visibleRect-prop">visibleRect</a>.
<h3 class=fn>void <a name="enterEvent"></a>QWidget::enterEvent ( <a href="qevent.html">QEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a
subclass to receive widget enter events.
<p> An event is sent to the widget when the mouse cursor enters the widget.
<p> <p>See also <a href="#leaveEvent">leaveEvent</a>(), <a href="#mouseMoveEvent">mouseMoveEvent</a>() and <a href="#event">event</a>().
<h3 class=fn>void <a name="erase"></a>QWidget::erase ( int x, int y, int w, int h )
</h3>
Erases the specified area <em>(x, y, w, h)</em> in the widget without generating
a <a href="#paintEvent">paint event</a>.
<p> If <em>w</em> is negative, it is replaced with <tt>width() - x</tt>.
If <em>h</em> is negative, it is replaced width <code>height() - y</code>.
<p> Child widgets are not affected.
<p> <p>See also <a href="#repaint">repaint</a>().
<h3 class=fn>void <a name="erase-2"></a>QWidget::erase ()
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This version erases the entire widget.
<h3 class=fn>void <a name="erase-3"></a>QWidget::erase ( const <a href="qrect.html">QRect</a> & r )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Erases the specified area <em>r</em> in the widget without generating
a <a href="#paintEvent">paint event</a>.
<h3 class=fn>void <a name="erase-4"></a>QWidget::erase ( const <a href="qregion.html">QRegion</a> & reg )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Erases the area defined by <em>reg</em>, without generating a
<a href="#paintEvent">paint event</a>.
<p> Child widgets are not affected.
<h3 class=fn>const <a href="qcolor.html">QColor</a> & <a name="eraseColor"></a>QWidget::eraseColor () const
</h3>
<p> Returns the erase color of the widget.
<p> <p>See also <a href="#setEraseColor">setEraseColor</a>(), <a href="#setErasePixmap">setErasePixmap</a>() and <a href="#backgroundColor">backgroundColor</a>().
<h3 class=fn>const <a href="qpixmap.html">QPixmap</a> * <a name="erasePixmap"></a>QWidget::erasePixmap () const
</h3>
Returns the widget's erase pixmap.
<p> <p>See also <a href="#setErasePixmap">setErasePixmap</a>() and <a href="#eraseColor">eraseColor</a>().
<h3 class=fn>bool <a name="event"></a>QWidget::event ( <a href="qevent.html">QEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This is the main event handler; it handles event <em>e</em>. You may
reimplement this function in a subclass, but we recommend using one
of the specialized event handlers instead.
<p> The main event handler first passes an event through all <a href="qobject.html#installEventFilter">event filters</a> that have been
installed. If none of the filters intercept the event, it calls one
of the specialized event handlers.
<p> Key press and release events are treated differently from other events.
<a href="#event">event</a>() checks for Tab and Shift+Tab and tries to move the focus
appropriately. If there is no widget to move the focus to (or the
key press is not Tab or Shift+Tab), event() calls <a href="#keyPressEvent">keyPressEvent</a>().
<p> This function returns TRUE if it is able to pass the event over to
someone, or FALSE if nobody wanted the event.
<p> <p>See also <a href="#closeEvent">closeEvent</a>(), <a href="#focusInEvent">focusInEvent</a>(), <a href="#focusOutEvent">focusOutEvent</a>(), <a href="#enterEvent">enterEvent</a>(), <a href="#keyPressEvent">keyPressEvent</a>(), <a href="#keyReleaseEvent">keyReleaseEvent</a>(), <a href="#leaveEvent">leaveEvent</a>(), <a href="#mouseDoubleClickEvent">mouseDoubleClickEvent</a>(), <a href="#mouseMoveEvent">mouseMoveEvent</a>(), <a href="#mousePressEvent">mousePressEvent</a>(), <a href="#mouseReleaseEvent">mouseReleaseEvent</a>(), <a href="#moveEvent">moveEvent</a>(), <a href="#paintEvent">paintEvent</a>(), <a href="#resizeEvent">resizeEvent</a>(), <a href="qobject.html#event">QObject::event</a>() and <a href="qobject.html#timerEvent">QObject::timerEvent</a>().
<p>Reimplemented from <a href="qobject.html#event">QObject</a>.
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="find"></a>QWidget::find ( WId id )<tt> [static]</tt>
</h3>
Returns a pointer to the widget with window identifer/handle <em>id</em>.
<p> The window identifier type depends on the underlying window system,
see qwindowdefs.h for the actual definition.
If there is no widget with this identifier, a null pointer is returned.
<h3 class=fn><a href="qfocusdata.html">QFocusData</a> * <a name="focusData"></a>QWidget::focusData ()<tt> [protected]</tt>
</h3>
Returns a pointer to the focus data for this widget's top-level
widget.
<p> Focus data always belongs to the top-level widget. The focus data
list contains all the widgets in this top-level widget that can
accept focus, in tab order. An iterator points to the current focus
widget (<a href="#focusWidget">focusWidget</a>() returns a pointer to this widget).
<p> This information is useful for implementing advanced versions
of <a href="#focusNextPrevChild">focusNextPrevChild</a>().
<h3 class=fn>void <a name="focusInEvent"></a>QWidget::focusInEvent ( <a href="qfocusevent.html">QFocusEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a
subclass to receive <a href="focus.html#keyboard-focus">keyboard focus</a> events (focus received) for the
widget.
<p> A widget normally must <a href="#setFocusPolicy">setFocusPolicy</a>() to something other than
NoFocus in order to receive focus events. (Note that the
application programmer can call <a href="#setFocus">setFocus</a>() on any widget, even those
that do not normally accept focus.)
<p> The default implementation updates the widget if it accepts
focus (see <a href="#focusPolicy">focusPolicy</a>()). It also calls <a href="#setMicroFocusHint">setMicroFocusHint</a>(), hinting any
system-specific input tools about the focus of the user's attention.
<p> <p>See also <a href="#focusOutEvent">focusOutEvent</a>(), <a href="#focusPolicy-prop">focusPolicy</a>, <a href="#keyPressEvent">keyPressEvent</a>(), <a href="#keyReleaseEvent">keyReleaseEvent</a>(), <a href="#event">event</a>() and <a href="qfocusevent.html">QFocusEvent</a>.
<p>Reimplemented in <a href="qtmultilineedit.html#focusInEvent">QtMultiLineEdit</a>.
<h3 class=fn>bool <a name="focusNextPrevChild"></a>QWidget::focusNextPrevChild ( bool next )<tt> [virtual protected]</tt>
</h3>
Finds a new widget to give the <a href="focus.html#keyboard-focus">keyboard focus</a> to, as appropriate for
Tab and Shift+Tab, and returns TRUE if is can find a new widget and
FALSE if it can't,
<p> If <em>next</em> is TRUE, this function searches "forwards", if <em>next</em> is
FALSE, it searches "backwards".
<p> Sometimes, you will want to reimplement this function. For example,
a web browser might reimplement it to move its "current active link"
forwards or backwards, and call <a href="#focusNextPrevChild">QWidget::focusNextPrevChild</a>() only
when it reaches the last or first link on the "page".
<p> Child widgets call <a href="#focusNextPrevChild">focusNextPrevChild</a>() on their parent widgets, but
only the top-level widget decides where to redirect focus. By
overriding this method for an object, you thus gain control of focus
traversal for all child widgets.
<p> <p>See also <a href="#focusData">focusData</a>().
<h3 class=fn>void <a name="focusOutEvent"></a>QWidget::focusOutEvent ( <a href="qfocusevent.html">QFocusEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a
subclass to receive <a href="focus.html#keyboard-focus">keyboard focus</a> events (focus lost) for the
widget.
<p> A widget normally must <a href="#setFocusPolicy">setFocusPolicy</a>() to something other than
NoFocus in order to receive focus events. (Note that the
application programmer can call <a href="#setFocus">setFocus</a>() on any widget, even those
that do not normally accept focus.)
<p> The default implementation calls <a href="#repaint">repaint</a>() since the widget's
<a href="#colorGroup">colorGroup</a>() changes from active to normal, so the widget probably
needs repainting. It also calls <a href="#setMicroFocusHint">setMicroFocusHint</a>(), hinting any
system-specific input tools about the focus of the user's attention.
<p> <p>See also <a href="#focusInEvent">focusInEvent</a>(), <a href="#focusPolicy-prop">focusPolicy</a>, <a href="#keyPressEvent">keyPressEvent</a>(), <a href="#keyReleaseEvent">keyReleaseEvent</a>(), <a href="#event">event</a>() and <a href="qfocusevent.html">QFocusEvent</a>.
<p>Example: <a href="qmag-example.html#x715">qmag/qmag.cpp</a>.
<h3 class=fn><a href="qwidget.html#FocusPolicy-enum">FocusPolicy</a> <a name="focusPolicy"></a>QWidget::focusPolicy () const
</h3><p>Returns the way the widget accepts keyboard focus.
See the <a href="qwidget.html#focusPolicy-prop">"focusPolicy"</a> property for details.
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="focusProxy"></a>QWidget::focusProxy () const
</h3> Returns a pointer to the focus proxy, or 0 if there is no focus
proxy.
<p> <p>See also <a href="#setFocusProxy">setFocusProxy</a>().
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="focusWidget"></a>QWidget::focusWidget () const
</h3>
Returns the focus widget in this widget's window. This
is not the same as <a href="qapplication.html#focusWidget">QApplication::focusWidget</a>(), which returns the
focus widget in the currently active window.
<h3 class=fn><a href="qfont.html">QFont</a> <a name="font"></a>QWidget::font () const
</h3><p>Returns the font currently set for the widget.
See the <a href="qwidget.html#font-prop">"font"</a> property for details.
<h3 class=fn>void <a name="fontChange"></a>QWidget::fontChange ( const <a href="qfont.html">QFont</a> & oldFont )<tt> [virtual protected]</tt>
</h3>
<p> This virtual function is called from <a href="#setFont">setFont</a>(). <em>oldFont</em> is the
previous font; you can get the new font from <a href="#font">font</a>().
<p> Reimplement this function if your widget needs to know when its font
changes. You will almost certainly need to update the widget using
<a href="#update">update</a>().
<p> The default implementation updates the widget including its
geometry.
<p> <p>See also <a href="#font-prop">font</a>, <a href="#font-prop">font</a>, <a href="#update">update</a>() and <a href="#updateGeometry">updateGeometry</a>().
<h3 class=fn><a href="qfontinfo.html">QFontInfo</a> <a name="fontInfo"></a>QWidget::fontInfo () const
</h3>
<p> Returns the font info for the widget's current font.
Equivalent to QFontInto(widget->font()).
<p> <p>See also <a href="#font-prop">font</a>, <a href="#fontMetrics">fontMetrics</a>() and <a href="#font-prop">font</a>.
<h3 class=fn><a href="qfontmetrics.html">QFontMetrics</a> <a name="fontMetrics"></a>QWidget::fontMetrics () const
</h3>
<p> Returns the font metrics for the widget's current font.
Equivalent to <a href="qfontmetrics.html">QFontMetrics</a>(widget->font()).
<p> <p>See also <a href="#font-prop">font</a>, <a href="#fontInfo">fontInfo</a>() and <a href="#font-prop">font</a>.
<p>Examples: <a href="drawdemo-example.html#x1649">drawdemo/drawdemo.cpp</a> and <a href="qmag-example.html#x716">qmag/qmag.cpp</a>.
<h3 class=fn>const <a href="qcolor.html">QColor</a> & <a name="foregroundColor"></a>QWidget::foregroundColor () const
</h3>
Same as <a href="#paletteForegroundColor">paletteForegroundColor</a>()
<h3 class=fn><a href="qrect.html">QRect</a> <a name="frameGeometry"></a>QWidget::frameGeometry () const
</h3><p>Returns geometry of the widget relative to its parent including any window frame.
See the <a href="qwidget.html#frameGeometry-prop">"frameGeometry"</a> property for details.
<h3 class=fn><a href="qsize.html">QSize</a> <a name="frameSize"></a>QWidget::frameSize () const
</h3><p>Returns the size of the widget including any window frame.
See the <a href="qwidget.html#frameSize-prop">"frameSize"</a> property for details.
<h3 class=fn>const <a href="qrect.html">QRect</a> & <a name="geometry"></a>QWidget::geometry () const
</h3><p>Returns the geometry of the widget relative to its parent and excluding the window frame.
See the <a href="qwidget.html#geometry-prop">"geometry"</a> property for details.
<h3 class=fn>WFlags <a name="getWFlags"></a>QWidget::getWFlags () const<tt> [protected]</tt>
</h3>
<p> Returns the <a href="qt.html#WidgetFlags">widget flags</a> for this this widget.
<p> Widget flags are a combination of <a href="qt.html#WidgetFlags-enum">Qt::WidgetFlags</a>.
<p> <p>See also <a href="#testWFlags">testWFlags</a>(), <a href="#setWFlags">setWFlags</a>() and <a href="#clearWFlags">clearWFlags</a>().
<h3 class=fn>void <a name="grabKeyboard"></a>QWidget::grabKeyboard ()
</h3> Grabs the keyboard input.
<p> This widget reveives all keyboard events and other widgets none
until <a href="#releaseKeyboard">releaseKeyboard</a>() is called. Mouse events are not
affected. Use <a href="#grabMouse">grabMouse</a>() if you want to grab that.
<p> The focus widget is not affected, except that it doesn't receive any
keyboard events. <a href="#setFocus">setFocus</a>() moves the focus as usual, but the new
focus widget receives keyboard events only after releaseKeyboard()
is called.
<p> If a different widget is currently grabbing keyboard input, that
widget's grab is released first.
<p> <p>See also <a href="#releaseKeyboard">releaseKeyboard</a>(), <a href="#grabMouse">grabMouse</a>(), <a href="#releaseMouse">releaseMouse</a>() and <a href="#focusWidget">focusWidget</a>().
<h3 class=fn>void <a name="grabMouse"></a>QWidget::grabMouse ()
</h3>
Grabs the mouse input.
<p> This widget receives all mouse events and other widgets none until
<a href="#releaseMouse">releaseMouse</a>() is called. Keyboard events are not affected. Use
<a href="#grabKeyboard">grabKeyboard</a>() if you want to grab that.
<p> <b>Warning:</b> Bugs in mouse-grabbing applications very often lock the
terminal. Use this function with extreme caution, and consider using
the -nograb command line option while debugging.
<p> It is almost never necessary to grab the mouse when using Qt, as Qt
grabs and releases it sensibly. In particular, Qt grabs the mouse
when a mouse button is pressed and keeps it until the last button is
released.
<p> Note that only visible widgets can grab mouse input. If <a href="#isVisible">isVisible</a>()
returns FALSE for a widget, that widget can not call <a href="#grabMouse">grabMouse</a>().
<p> <p>See also <a href="#releaseMouse">releaseMouse</a>(), <a href="#grabKeyboard">grabKeyboard</a>(), <a href="#releaseKeyboard">releaseKeyboard</a>(), <a href="#grabKeyboard">grabKeyboard</a>() and <a href="#focusWidget">focusWidget</a>().
<h3 class=fn>void <a name="grabMouse-2"></a>QWidget::grabMouse ( const <a href="qcursor.html">QCursor</a> & cursor )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Grabs the mouse input and changes the cursor shape.
<p> The cursor will assume shape <em>cursor</em> (for as long as the mouse focus is
grabbed) and this widget will be the only one to receive mouse events
until <a href="#releaseMouse">releaseMouse</a>() is called().
<p> <b>Warning:</b> Grabbing the mouse might lock the terminal.
<p> <p>See also <a href="#releaseMouse">releaseMouse</a>(), <a href="#grabKeyboard">grabKeyboard</a>(), <a href="#releaseKeyboard">releaseKeyboard</a>() and <a href="#cursor-prop">cursor</a>.
<h3 class=fn>bool <a name="hasFocus"></a>QWidget::hasFocus () const
</h3><p>Returns TRUE if this widget (or its focus proxy) has the keyboard input focus; otherwise returns FALSE.
See the <a href="qwidget.html#focus-prop">"focus"</a> property for details.
<h3 class=fn>bool <a name="hasMouse"></a>QWidget::hasMouse () const
</h3><p>Returns TRUE if the widget is under the mouse cursor; otherwise returns FALSE.
See the <a href="qwidget.html#underMouse-prop">"underMouse"</a> property for details.
<h3 class=fn>bool <a name="hasMouseTracking"></a>QWidget::hasMouseTracking () const
</h3><p>Returns TRUE if mouse tracking is enabled for this widget; otherwise returns FALSE.
See the <a href="qwidget.html#mouseTracking-prop">"mouseTracking"</a> property for details.
<h3 class=fn>int <a name="height"></a>QWidget::height () const
</h3><p>Returns the height of the widget excluding any window frame.
See the <a href="qwidget.html#height-prop">"height"</a> property for details.
<h3 class=fn>int <a name="heightForWidth"></a>QWidget::heightForWidth ( int w ) const<tt> [virtual]</tt>
</h3>
Returns the preferred height for this widget, given the width <em>w</em>.
The default implementation returns 0, indicating that the preferred
height does not depend on the width.
<p> <b>Warning:</b> Does not look at the widget's layout.
<p>Reimplemented in <a href="qmenubar.html#heightForWidth">QMenuBar</a> and <a href="qtextedit.html#heightForWidth">QTextEdit</a>.
<h3 class=fn>void <a name="hide"></a>QWidget::hide ()<tt> [virtual slot]</tt>
</h3>
Hides the widget.
<p> You almost never have to reimplement this function. If you need to
do something after a widget is hidden, use <a href="#hideEvent">hideEvent</a>() instead.
<p> <p>See also <a href="#hideEvent">hideEvent</a>(), <a href="#hidden-prop">hidden</a>, <a href="#show">show</a>(), <a href="#showMinimized">showMinimized</a>(), <a href="#visible-prop">visible</a> and <a href="#close">close</a>().
<p>Examples: <a href="mdi-example.html#x1181">mdi/application.cpp</a>, <a href="ftpclient-example.html#x1034">network/ftpclient/ftpmainwindow.cpp</a>, <a href="popup-example.html#x891">popup/popup.cpp</a>, <a href="progress-example.html#x859">progress/progress.cpp</a>, <a href="scrollview-example.html#x510">scrollview/scrollview.cpp</a> and <a href="xform-example.html#x123">xform/xform.cpp</a>.
<p>Reimplemented in <a href="qmenubar.html#hide">QMenuBar</a>.
<h3 class=fn>void <a name="hideEvent"></a>QWidget::hideEvent ( <a href="qhideevent.html">QHideEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a
subclass to receive widget hide events.
<p> Hide events are sent to widgets immediately after they have been hidden.
<p> <p>See also <a href="#event">event</a>() and <a href="qhideevent.html">QHideEvent</a>.
<h3 class=fn>const <a href="qpixmap.html">QPixmap</a> * <a name="icon"></a>QWidget::icon () const
</h3><p>Returns the widget icon pixmap.
See the <a href="qwidget.html#icon-prop">"icon"</a> property for details.
<h3 class=fn><a href="qstring.html">QString</a> <a name="iconText"></a>QWidget::iconText () const
</h3><p>Returns the widget icon text.
See the <a href="qwidget.html#iconText-prop">"iconText"</a> property for details.
<h3 class=fn>void <a name="iconify"></a>QWidget::iconify ()<tt> [slot]</tt>
</h3>
<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
<p>
<h3 class=fn>void <a name="imComposeEvent"></a>QWidget::imComposeEvent ( <a href="qimevent.html">QIMEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive Input Method composition events. This handler
is called when the user has entered some text via an Input Method.
<p> The default implementation calls e->ignore(), which rejects the
Input Method event.
See the <a href="qimevent.html">QIMEvent</a> documentation for more details.
<p> <p>See also <a href="#event">event</a>() and <a href="qimevent.html">QIMEvent</a>.
<h3 class=fn>void <a name="imEndEvent"></a>QWidget::imEndEvent ( <a href="qimevent.html">QIMEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive Input Method composition events. This handler
is called when the user has finished inputting text via an Input
Method.
<p> The default implementation calls e->ignore(), which rejects the
Input Method event.
See the <a href="qimevent.html">QIMEvent</a> documentation for more details.
<p> <p>See also <a href="#event">event</a>() and <a href="qimevent.html">QIMEvent</a>.
<h3 class=fn>void <a name="imStartEvent"></a>QWidget::imStartEvent ( <a href="qimevent.html">QIMEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive Input Method composition events. This handler
is called when the user begins inputting text via an Input Method.
<p> The default implementation calls e->ignore(), which rejects the
Input Method event.
See the <a href="qimevent.html">QIMEvent</a> documentation for more details.
<p> <p>See also <a href="#event">event</a>() and <a href="qimevent.html">QIMEvent</a>.
<h3 class=fn>bool <a name="isActiveWindow"></a>QWidget::isActiveWindow () const
</h3><p>Returns TRUE if this widget is the active window or a child of it; otherwise returns FALSE.
See the <a href="qwidget.html#isActiveWindow-prop">"isActiveWindow"</a> property for details.
<h3 class=fn>bool <a name="isDesktop"></a>QWidget::isDesktop () const
</h3><p>Returns TRUE if the widget is a desktop widget; otherwise returns FALSE.
See the <a href="qwidget.html#isDesktop-prop">"isDesktop"</a> property for details.
<h3 class=fn>bool <a name="isDialog"></a>QWidget::isDialog () const
</h3><p>Returns TRUE if the widget is a dialog widget; otherwise returns FALSE.
See the <a href="qwidget.html#isDialog-prop">"isDialog"</a> property for details.
<h3 class=fn>bool <a name="isEnabled"></a>QWidget::isEnabled () const
</h3><p>Returns TRUE if the widget is enabled; otherwise returns FALSE.
See the <a href="qwidget.html#enabled-prop">"enabled"</a> property for details.
<h3 class=fn>bool <a name="isEnabledTo"></a>QWidget::isEnabledTo ( <a href="qwidget.html">QWidget</a> * ancestor ) const
</h3>
Returns TRUE if this widget would become enabled if <em>ancestor</em> is
enabled; otherwise returns FALSE.
<p> This is the case if neither the widget itself nor every parent up to
but excluding <em>ancestor</em> has been explicitly disabled.
<p> <a href="#isEnabledTo">isEnabledTo</a>(0) is equivalent to <a href="#isEnabled">isEnabled</a>().
<p> <p>See also <a href="#enabled-prop">enabled</a> and <a href="#enabled-prop">enabled</a>.
<h3 class=fn>bool <a name="isEnabledToTLW"></a>QWidget::isEnabledToTLW () const
</h3>
<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
<p> This function is deprecated. It is equivalent to <a href="#isEnabled">isEnabled</a>()
<h3 class=fn>bool <a name="isFocusEnabled"></a>QWidget::isFocusEnabled () const
</h3><p>Returns TRUE if the widget accepts keyboard focus; otherwise returns FALSE.
See the <a href="qwidget.html#focusEnabled-prop">"focusEnabled"</a> property for details.
<h3 class=fn>bool <a name="isHidden"></a>QWidget::isHidden () const
</h3><p>Returns TRUE if the widget is explicitly hidden; otherwise returns FALSE.
See the <a href="qwidget.html#hidden-prop">"hidden"</a> property for details.
<h3 class=fn>bool <a name="isMaximized"></a>QWidget::isMaximized () const
</h3>
<p> Returns TRUE if this widget is a top-level widget that is
maximized; otherwise returns FALSE.
<p> Note that due to limitations in some window-systems, this does not
always report the expected results (e.g. if the user on X11
maximizes the window via the window manager, Qt has no way of
distinguishing this from any other resize). This is expected to
improve as window manager protocols advance.
<p> <p>See also <a href="#showMaximized">showMaximized</a>().
<h3 class=fn>bool <a name="isMinimized"></a>QWidget::isMinimized () const
</h3><p>Returns TRUE if this widget is minimized (iconified); otherwise returns FALSE.
See the <a href="qwidget.html#minimized-prop">"minimized"</a> property for details.
<h3 class=fn>bool <a name="isModal"></a>QWidget::isModal () const
</h3><p>Returns TRUE if the widget is a modal widget; otherwise returns FALSE.
See the <a href="qwidget.html#isModal-prop">"isModal"</a> property for details.
<h3 class=fn>bool <a name="isPopup"></a>QWidget::isPopup () const
</h3><p>Returns TRUE if the widget is a popup widget; otherwise returns FALSE.
See the <a href="qwidget.html#isPopup-prop">"isPopup"</a> property for details.
<h3 class=fn>bool <a name="isTopLevel"></a>QWidget::isTopLevel () const
</h3><p>Returns TRUE if the widget is a top-level widget; otherwise returns FALSE.
See the <a href="qwidget.html#isTopLevel-prop">"isTopLevel"</a> property for details.
<h3 class=fn>bool <a name="isUpdatesEnabled"></a>QWidget::isUpdatesEnabled () const
</h3><p>Returns TRUE if updates are enabled; otherwise returns FALSE.
See the <a href="qwidget.html#updatesEnabled-prop">"updatesEnabled"</a> property for details.
<h3 class=fn>bool <a name="isVisible"></a>QWidget::isVisible () const
</h3><p>Returns TRUE if the widget is visible; otherwise returns FALSE.
See the <a href="qwidget.html#visible-prop">"visible"</a> property for details.
<h3 class=fn>bool <a name="isVisibleTo"></a>QWidget::isVisibleTo ( <a href="qwidget.html">QWidget</a> * ancestor ) const
</h3>
Returns TRUE if this widget would become visible if <em>ancestor</em> is
shown; otherwise returns FALSE.
<p> The TRUE case occurs if neither the widget itself nor any parent
up to but excluding <em>ancestor</em> has been explicitly hidden.
<p> This function will still return TRUE if the widget it is obscured by
other windows on the screen, but could be physically visible if it
or they were to be moved.
<p> <a href="#isVisibleTo">isVisibleTo</a>(0) is very similar to <a href="#isVisible">isVisible</a>(), with the exception
that it does not cover the iconfied-case or the situation where the
window exists on another virtual desktop.
<p> <p>See also <a href="#show">show</a>(), <a href="#hide">hide</a>() and <a href="#visible-prop">visible</a>.
<h3 class=fn>bool <a name="isVisibleToTLW"></a>QWidget::isVisibleToTLW () const
</h3>
<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
<p> This function is deprecated. It is equivalent to <a href="#isVisible">isVisible</a>()
<h3 class=fn>void <a name="keyPressEvent"></a>QWidget::keyPressEvent ( <a href="qkeyevent.html">QKeyEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive key press events for the widget.
<p> A widget must call <a href="#setFocusPolicy">setFocusPolicy</a>() to accept focus initially and
have focus in order to receive a key press event.
<p> If you reimplement this handler, it is very important that you
<a href="qkeyevent.html">ignore()</a> the event if you do not
understand it, so that the widget's parent can interpret it.
<p> The default implementation closes popup widgets if the user presses
Esc. Otherwise the event is ignored.
<p> <p>See also <a href="#keyReleaseEvent">keyReleaseEvent</a>(), <a href="qkeyevent.html#ignore">QKeyEvent::ignore</a>(), <a href="#focusPolicy-prop">focusPolicy</a>, <a href="#focusInEvent">focusInEvent</a>(), <a href="#focusOutEvent">focusOutEvent</a>(), <a href="#event">event</a>() and <a href="qkeyevent.html">QKeyEvent</a>.
<p>Examples: <a href="fileiconview-example.html#x1587">fileiconview/qfileiconview.cpp</a> and <a href="picture-example.html#x924">picture/picture.cpp</a>.
<p>Reimplemented in <a href="qlineedit.html#keyPressEvent">QLineEdit</a>, <a href="qtextedit.html#keyPressEvent">QTextEdit</a> and <a href="qtmultilineedit.html#keyPressEvent">QtMultiLineEdit</a>.
<h3 class=fn>void <a name="keyReleaseEvent"></a>QWidget::keyReleaseEvent ( <a href="qkeyevent.html">QKeyEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive key release events for the widget.
<p> A widget must <a href="#setFocusPolicy">accept focus</a> initially
and <a href="#hasFocus">have focus</a> in order to receive a key
release event.
<p> If you reimplement this handler, it is very important that you <a href="qkeyevent.html">ignore()</a> the release if you do not understand it,
so that the widget's parent can interpret it.
<p> The default implementation ignores the event.
<p> <p>See also <a href="#keyPressEvent">keyPressEvent</a>(), <a href="qkeyevent.html#ignore">QKeyEvent::ignore</a>(), <a href="#focusPolicy-prop">focusPolicy</a>, <a href="#focusInEvent">focusInEvent</a>(), <a href="#focusOutEvent">focusOutEvent</a>(), <a href="#event">event</a>() and <a href="qkeyevent.html">QKeyEvent</a>.
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="keyboardGrabber"></a>QWidget::keyboardGrabber ()<tt> [static]</tt>
</h3>
Returns a pointer to the widget that is currently grabbing the
keyboard input.
<p> If no widget in this application is currently grabbing the keyboard, 0
is returned.
<p> <p>See also <a href="#grabMouse">grabMouse</a>() and <a href="#mouseGrabber">mouseGrabber</a>().
<h3 class=fn><a href="qlayout.html">QLayout</a> * <a name="layout"></a>QWidget::layout () const
</h3>
<p> Returns a pointer to the layout engine that manages the geometry of
this widget's children.
<p> If the widget does not have a layout, <a href="#layout">layout</a>() returns a null pointer.
<p> <p>See also <a href="#sizePolicy-prop">sizePolicy</a>.
<p>Example: <a href="simple-qfont-demo-walkthrough.html#x2408">fonts/simple-qfont-demo/viewer.cpp</a>.
<h3 class=fn>void <a name="leaveEvent"></a>QWidget::leaveEvent ( <a href="qevent.html">QEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a
subclass to receive widget leave events.
<p> A leave event is sent to the widget when the mouse cursor leaves
the widget.
<p> <p>See also <a href="#enterEvent">enterEvent</a>(), <a href="#mouseMoveEvent">mouseMoveEvent</a>() and <a href="#event">event</a>().
<h3 class=fn>void <a name="lower"></a>QWidget::lower ()<tt> [slot]</tt>
</h3>
Lowers the widget to the bottom of the parent widget's stack.
<p> If there are siblings of this widget that overlap it on the screen, this
widget will be obscured by its siblings afterwards.
<p> <p>See also <a href="#raise">raise</a>() and <a href="#stackUnder">stackUnder</a>().
<h3 class=fn>bool <a name="macEvent"></a>QWidget::macEvent ( MSG * )<tt> [virtual protected]</tt>
</h3>
This special event handler can be reimplemented in a subclass to receive
native Macintosh events.
<p> In your reimplementation of this function, if you want to stop the
event being handled by Qt, return TRUE. If you return FALSE, this
native event is passed back to Qt, which translates the event into
a Qt event and sends it to the widget.
<p> <b>Warning:</b> This function is not portable.
<p> <p>See also <a href="qapplication.html#macEventFilter">QApplication::macEventFilter</a>().
<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="mapFrom"></a>QWidget::mapFrom ( <a href="qwidget.html">QWidget</a> * parent, const <a href="qpoint.html">QPoint</a> & pos ) const
</h3> Translates the widget coordinate <em>pos</em> from the coordinate system
of <em>parent</em> to this widget's coordinate system, which must be non-null
and be a parent of this widget.
<p> <p>See also <a href="#mapTo">mapTo</a>(), <a href="#mapFromParent">mapFromParent</a>() and <a href="#mapFromGlobal">mapFromGlobal</a>().
<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="mapFromGlobal"></a>QWidget::mapFromGlobal ( const <a href="qpoint.html">QPoint</a> & pos ) const
</h3>
Translates the global screen coordinate <em>pos</em> to widget coordinates.
<p>See also <a href="#mapToGlobal">mapToGlobal</a>(), <a href="#mapFrom">mapFrom</a>() and <a href="#mapFromParent">mapFromParent</a>().
<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="mapFromParent"></a>QWidget::mapFromParent ( const <a href="qpoint.html">QPoint</a> & pos ) const
</h3>
Translates the parent widget coordinate <em>pos</em> to widget coordinates.
<p> Same as <a href="#mapFromGlobal">mapFromGlobal</a>() if the widget has no parent.
<p> <p>See also <a href="#mapToParent">mapToParent</a>(), <a href="#mapFrom">mapFrom</a>() and <a href="#mapFromGlobal">mapFromGlobal</a>().
<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="mapTo"></a>QWidget::mapTo ( <a href="qwidget.html">QWidget</a> * parent, const <a href="qpoint.html">QPoint</a> & pos ) const
</h3> Translates the widget coordinate <em>pos</em> to the coordinate system
of <em>parent</em>, which must be non-null and be a parent of this widget.
<p> <p>See also <a href="#mapFrom">mapFrom</a>(), <a href="#mapToParent">mapToParent</a>() and <a href="#mapToGlobal">mapToGlobal</a>().
<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="mapToGlobal"></a>QWidget::mapToGlobal ( const <a href="qpoint.html">QPoint</a> & pos ) const
</h3>
Translates the widget coordinate <em>pos</em> to global screen coordinates.
For example, <pre> mapToGlobal(QPoint(0,0))</pre>
would give the
global coordinates of the top-left pixel of the widget.
<p>See also <a href="#mapFromGlobal">mapFromGlobal</a>(), <a href="#mapTo">mapTo</a>() and <a href="#mapToParent">mapToParent</a>().
<p>Example: <a href="scribble-example.html#x561">scribble/scribble.cpp</a>.
<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="mapToParent"></a>QWidget::mapToParent ( const <a href="qpoint.html">QPoint</a> & pos ) const
</h3>
Translates the widget coordinate <em>pos</em> to a coordinate in the parent widget.
<p> Same as <a href="#mapToGlobal">mapToGlobal</a>() if the widget has no parent.
<p> <p>See also <a href="#mapFromParent">mapFromParent</a>(), <a href="#mapTo">mapTo</a>() and <a href="#mapToGlobal">mapToGlobal</a>().
<h3 class=fn>int <a name="maximumHeight"></a>QWidget::maximumHeight () const
</h3><p>Returns the widget's maximum height.
See the <a href="qwidget.html#maximumHeight-prop">"maximumHeight"</a> property for details.
<h3 class=fn><a href="qsize.html">QSize</a> <a name="maximumSize"></a>QWidget::maximumSize () const
</h3><p>Returns the widget's maximum size.
See the <a href="qwidget.html#maximumSize-prop">"maximumSize"</a> property for details.
<h3 class=fn>int <a name="maximumWidth"></a>QWidget::maximumWidth () const
</h3><p>Returns the widget's maximum width.
See the <a href="qwidget.html#maximumWidth-prop">"maximumWidth"</a> property for details.
<h3 class=fn>int <a name="metric"></a>QWidget::metric ( int m ) const<tt> [virtual protected]</tt>
</h3>
Internal implementation of the virtual <a href="qpaintdevice.html#metric">QPaintDevice::metric</a>() function.
<p> Use the <a href="qpaintdevicemetrics.html">QPaintDeviceMetrics</a> class instead.
<p> <em>m</em> is the metric to get.
<p>Reimplemented from <a href="qpaintdevice.html#metric">QPaintDevice</a>.
<h3 class=fn><a href="qrect.html">QRect</a> <a name="microFocusHint"></a>QWidget::microFocusHint () const
</h3><p>Returns the currently set micro focus hint for this widget.
See the <a href="qwidget.html#microFocusHint-prop">"microFocusHint"</a> property for details.
<h3 class=fn>int <a name="minimumHeight"></a>QWidget::minimumHeight () const
</h3><p>Returns the widget's minimum height.
See the <a href="qwidget.html#minimumHeight-prop">"minimumHeight"</a> property for details.
<h3 class=fn><a href="qsize.html">QSize</a> <a name="minimumSize"></a>QWidget::minimumSize () const
</h3><p>Returns the widget's minimum size.
See the <a href="qwidget.html#minimumSize-prop">"minimumSize"</a> property for details.
<h3 class=fn><a href="qsize.html">QSize</a> <a name="minimumSizeHint"></a>QWidget::minimumSizeHint () const<tt> [virtual]</tt>
</h3><p>Returns the recommended minimum size for the widget.
See the <a href="qwidget.html#minimumSizeHint-prop">"minimumSizeHint"</a> property for details.
<p>Reimplemented in <a href="qlineedit.html#minimumSizeHint">QLineEdit</a> and <a href="qtmultilineedit.html#minimumSizeHint">QtMultiLineEdit</a>.
<h3 class=fn>int <a name="minimumWidth"></a>QWidget::minimumWidth () const
</h3><p>Returns the widget's minimum width.
See the <a href="qwidget.html#minimumWidth-prop">"minimumWidth"</a> property for details.
<h3 class=fn>void <a name="mouseDoubleClickEvent"></a>QWidget::mouseDoubleClickEvent ( <a href="qmouseevent.html">QMouseEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive mouse double click events for the widget.
<p> The default implementation generates a normal mouse press event.
<p> Note that the widgets gets a <a href="#mousePressEvent">mousePressEvent</a>() and a <a href="#mouseReleaseEvent">mouseReleaseEvent</a>()
before the <a href="#mouseDoubleClickEvent">mouseDoubleClickEvent</a>().
<p> <p>See also <a href="#mousePressEvent">mousePressEvent</a>(), <a href="#mouseReleaseEvent">mouseReleaseEvent</a>(), <a href="#mouseMoveEvent">mouseMoveEvent</a>(), <a href="#event">event</a>() and <a href="qmouseevent.html">QMouseEvent</a>.
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="mouseGrabber"></a>QWidget::mouseGrabber ()<tt> [static]</tt>
</h3>
Returns a pointer to the widget that is currently grabbing the
mouse input.
<p> If no widget in this application is currently grabbing the mouse, 0 is
returned.
<p> <p>See also <a href="#grabMouse">grabMouse</a>() and <a href="#keyboardGrabber">keyboardGrabber</a>().
<h3 class=fn>void <a name="mouseMoveEvent"></a>QWidget::mouseMoveEvent ( <a href="qmouseevent.html">QMouseEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive mouse move events for the widget.
<p> If mouse tracking is switched off, mouse move events only occur if a
mouse button is down while the mouse is being moved. If mouse
tracking is switched on, mouse move events occur even if no mouse
button is down.
<p> <a href="qmouseevent.html#pos">QMouseEvent::pos</a>() reports the position of the mouse cursor, relative to
this widget. For press and release events, the position is usually
the same as the position of the last mouse move event, but it might be
different if the user moves and clicks the mouse fast. This is
a feature of the underlying window system, not Qt.
<p> <p>See also <a href="#mouseTracking-prop">mouseTracking</a>, <a href="#mousePressEvent">mousePressEvent</a>(), <a href="#mouseReleaseEvent">mouseReleaseEvent</a>(), <a href="#mouseDoubleClickEvent">mouseDoubleClickEvent</a>(), <a href="#event">event</a>() and <a href="qmouseevent.html">QMouseEvent</a>.
<p>Examples: <a href="aclock-example.html#x2081">aclock/aclock.cpp</a>, <a href="drawlines-example.html#x1621">drawlines/connect.cpp</a>, <a href="simple_dd-example.html#x2502">iconview/simple_dd/main.cpp</a>, <a href="life-example.html#x1316">life/life.cpp</a>, <a href="popup-example.html#x892">popup/popup.cpp</a>, <a href="qmag-example.html#x719">qmag/qmag.cpp</a> and <a href="scribble-example.html#x562">scribble/scribble.cpp</a>.
<p>Reimplemented in <a href="qsizegrip.html#mouseMoveEvent">QSizeGrip</a>.
<h3 class=fn>void <a name="mousePressEvent"></a>QWidget::mousePressEvent ( <a href="qmouseevent.html">QMouseEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive mouse press events for the widget.
<p> If you create new widgets in the <a href="#mousePressEvent">mousePressEvent</a>() the
<a href="#mouseReleaseEvent">mouseReleaseEvent</a>() may not end up where you expect, depending on the
underlying window system (or X11 window manager), the widgets'
location and maybe more.
<p> The default implementation implements the closing of popup widgets
when you click outside the window. For other widget types it does
nothing.
<p> <p>See also <a href="#mouseReleaseEvent">mouseReleaseEvent</a>(), <a href="#mouseDoubleClickEvent">mouseDoubleClickEvent</a>(), <a href="#mouseMoveEvent">mouseMoveEvent</a>(), <a href="#event">event</a>() and <a href="qmouseevent.html">QMouseEvent</a>.
<p>Examples: <a href="biff-example.html#x1907">biff/biff.cpp</a>, <a href="drawlines-example.html#x1622">drawlines/connect.cpp</a>, <a href="simple_dd-example.html#x2503">iconview/simple_dd/main.cpp</a>, <a href="life-example.html#x1317">life/life.cpp</a>, <a href="qmag-example.html#x720">qmag/qmag.cpp</a>, <a href="scribble-example.html#x563">scribble/scribble.cpp</a> and <a href="tooltip-example.html#x165">tooltip/tooltip.cpp</a>.
<p>Reimplemented in <a href="qsizegrip.html#mousePressEvent">QSizeGrip</a>.
<h3 class=fn>void <a name="mouseReleaseEvent"></a>QWidget::mouseReleaseEvent ( <a href="qmouseevent.html">QMouseEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive mouse release events for the widget.
<p> <p>See also <a href="#mouseDoubleClickEvent">mouseDoubleClickEvent</a>(), <a href="#mouseMoveEvent">mouseMoveEvent</a>(), <a href="#event">event</a>() and <a href="qmouseevent.html">QMouseEvent</a>.
<p>Examples: <a href="drawlines-example.html#x1623">drawlines/connect.cpp</a>, <a href="hello-example.html#x1468">hello/hello.cpp</a>, <a href="popup-example.html#x893">popup/popup.cpp</a>, <a href="qmag-example.html#x721">qmag/qmag.cpp</a>, <a href="scribble-example.html#x564">scribble/scribble.cpp</a>, <a href="showimg-example.html#x450">showimg/showimg.cpp</a> and <a href="t14.html#x2245">t14/cannon.cpp</a>.
<h3 class=fn>void <a name="move"></a>QWidget::move ( const <a href="qpoint.html">QPoint</a> & )<tt> [slot]</tt>
</h3><p>Sets the position of the widget in its parent widget.
See the <a href="qwidget.html#pos-prop">"pos"</a> property for details.
<h3 class=fn>void <a name="move-2"></a>QWidget::move ( int x, int y )<tt> [virtual slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This corresponds to <a href="#move">move</a>( <a href="qsize.html">QSize</a>(<em>x</em>, <em>y</em>) ).
<h3 class=fn>void <a name="moveEvent"></a>QWidget::moveEvent ( <a href="qmoveevent.html">QMoveEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a subclass to receive
widget move events. When the widget receives this event, it is
already at the new position.
<p> The old position is accessible through <a href="qmoveevent.html#oldPos">QMoveEvent::oldPos</a>().
<p> <p>See also <a href="#resizeEvent">resizeEvent</a>(), <a href="#event">event</a>(), <a href="#pos-prop">pos</a> and <a href="qmoveevent.html">QMoveEvent</a>.
<h3 class=fn>bool <a name="ownCursor"></a>QWidget::ownCursor () const
</h3><p>Returns TRUE if the widget uses its own cursor; otherwise returns FALSE.
See the <a href="qwidget.html#ownCursor-prop">"ownCursor"</a> property for details.
<h3 class=fn>bool <a name="ownFont"></a>QWidget::ownFont () const
</h3><p>Returns TRUE if the widget uses its own font; otherwise returns FALSE.
See the <a href="qwidget.html#ownFont-prop">"ownFont"</a> property for details.
<h3 class=fn>bool <a name="ownPalette"></a>QWidget::ownPalette () const
</h3><p>Returns TRUE if the widget uses its own palette; otherwise returns FALSE.
See the <a href="qwidget.html#ownPalette-prop">"ownPalette"</a> property for details.
<h3 class=fn>void <a name="paintEvent"></a>QWidget::paintEvent ( <a href="qpaintevent.html">QPaintEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a
subclass to receive paint events.
<p> A paint event is a request to repaint all or part of the widget. It
can happen as a result of <a href="#repaint">repaint</a>() or <a href="#update">update</a>(), or because the
widget was obscured and has now been uncovered, or for many other
reasons.
<p> Many widgets can simply repaint their entire surface when asked to,
but some slow widgets need to optimize by painting only the
requested region: <a href="qpaintevent.html#region">QPaintEvent::region</a>(). This speed optimization
does not change the result, as painting is clipped to that region
during event processing. <a href="qlistview.html">QListView</a> and <a href="qcanvas.html">QCanvas</a> do this, for
example.
<p> Qt also tries to speed up painting by merging multiple paint events
into one. When update() is called several times or the window
system sends several paint events, Qt merges these events into one
event with a larger region (see <a href="qregion.html#unite">QRegion::unite</a>()). repaint() does
not permit this optimization, so we suggest using update() when
possible.
<p> When the paint event occurs, the update region normally has been
erased, so that you're painting on the widget's background. There
are a couple of exceptions and <a href="qpaintevent.html#erased">QPaintEvent::erased</a>() tells
you whether the widget has been erased or not.
<p> The background can be set using <a href="#setBackgroundMode">setBackgroundMode</a>(),
<a href="#setPaletteBackgroundColor">setPaletteBackgroundColor</a>() or <a href="#setBackgroundPixmap">setBackgroundPixmap</a>(). The documentation for
setBackgroundMode() elaborates on the background; we recommend
reading it.
<p> <p>See also <a href="#event">event</a>(), <a href="#repaint">repaint</a>(), <a href="#update">update</a>(), <a href="qpainter.html">QPainter</a>, <a href="qpixmap.html">QPixmap</a> and <a href="qpaintevent.html">QPaintEvent</a>.
<p>Examples: <a href="drawdemo-example.html#x1652">drawdemo/drawdemo.cpp</a>, <a href="drawlines-example.html#x1624">drawlines/connect.cpp</a>, <a href="qmag-example.html#x722">qmag/qmag.cpp</a>, <a href="scribble-example.html#x565">scribble/scribble.cpp</a>, <a href="splitter-example.html#x402">splitter/splitter.cpp</a>, <a href="t8.html#x2149">t8/cannon.cpp</a> and <a href="t9.html#x2159">t9/cannon.cpp</a>.
<p>Reimplemented in <a href="qbutton.html#paintEvent">QButton</a>, <a href="qframe.html#paintEvent">QFrame</a>, <a href="qglwidget.html#paintEvent">QGLWidget</a>, <a href="qsizegrip.html#paintEvent">QSizeGrip</a>, <a href="qstatusbar.html#paintEvent">QStatusBar</a> and <a href="qtabbar.html#paintEvent">QTabBar</a>.
<h3 class=fn>const <a href="qpalette.html">QPalette</a> & <a name="palette"></a>QWidget::palette () const
</h3><p>Returns the widget's palette.
See the <a href="qwidget.html#palette-prop">"palette"</a> property for details.
<h3 class=fn>const <a href="qcolor.html">QColor</a> & <a name="paletteBackgroundColor"></a>QWidget::paletteBackgroundColor () const
</h3><p>Returns the background color of the widget.
See the <a href="qwidget.html#paletteBackgroundColor-prop">"paletteBackgroundColor"</a> property for details.
<h3 class=fn>const <a href="qpixmap.html">QPixmap</a> * <a name="paletteBackgroundPixmap"></a>QWidget::paletteBackgroundPixmap () const
</h3><p>Returns the background pixmap of the widget.
See the <a href="qwidget.html#paletteBackgroundPixmap-prop">"paletteBackgroundPixmap"</a> property for details.
<h3 class=fn>void <a name="paletteChange"></a>QWidget::paletteChange ( const <a href="qpalette.html">QPalette</a> & oldPalette )<tt> [virtual protected]</tt>
</h3>
<p> This virtual function is called from <a href="#setPalette">setPalette</a>(). <em>oldPalette</em> is the
previous palette; you can get the new palette from <a href="#palette">palette</a>().
<p> Reimplement this function if your widget needs to know when its
palette changes.
<p> <p>See also <a href="#palette-prop">palette</a> and <a href="#palette-prop">palette</a>.
<h3 class=fn>const <a href="qcolor.html">QColor</a> & <a name="paletteForegroundColor"></a>QWidget::paletteForegroundColor () const
</h3><p>Returns the foreground color of the widget.
See the <a href="qwidget.html#paletteForegroundColor-prop">"paletteForegroundColor"</a> property for details.
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="parentWidget"></a>QWidget::parentWidget ( bool sameWindow = FALSE ) const
</h3>
<p> Returns a pointer to the parent of this widget, or a null pointer if
it does not have any parent widget. If <em>sameWindow</em> is TRUE and the
widget is top level returns 0; otherwise returns the widget's
parent.
<h3 class=fn>void <a name="polish"></a>QWidget::polish ()<tt> [virtual slot]</tt>
</h3>
Delayed initialization of a widget.
<p> This function will be called <em>after</em> a widget has been fully created
and <em>before</em> it is shown the very first time.
<p> Polishing is useful for final initialization which depends on having
an instantiated widget. This is something a constructor cannot
guarantee since the initialization of the subclasses might not be
finished.
<p> After this function, the widget has a proper font and palette and
<a href="qapplication.html#polish">QApplication::polish</a>() has been called.
<p> Remember to call QWidget's implementation when reimplementing this
function.
<p> <p>See also <a href="#constPolish">constPolish</a>() and <a href="qapplication.html#polish">QApplication::polish</a>().
<p>Example: <a href="menu-example.html#x1135">menu/menu.cpp</a>.
<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="pos"></a>QWidget::pos () const
</h3><p>Returns the position of the widget in its parent widget.
See the <a href="qwidget.html#pos-prop">"pos"</a> property for details.
<h3 class=fn>void <a name="raise"></a>QWidget::raise ()<tt> [slot]</tt>
</h3>
Raises this widget to the top of the parent widget's stack.
<p> If there are any siblings of this widget that overlap it on the screen,
this widget will be visually in front of its siblings afterwards.
<p> <p>See also <a href="#lower">lower</a>() and <a href="#stackUnder">stackUnder</a>().
<p>Example: <a href="showimg-example.html#x452">showimg/showimg.cpp</a>.
<h3 class=fn>void <a name="recreate"></a>QWidget::recreate ( <a href="qwidget.html">QWidget</a> * parent, WFlags f, const <a href="qpoint.html">QPoint</a> & p, bool showIt = FALSE )
</h3>
<p> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
<p> This method is provided to aid porting from Qt 1.0 to 2.0. It has
been renamed <a href="#reparent">reparent</a>() in Qt 2.0.
<h3 class=fn><a href="qrect.html">QRect</a> <a name="rect"></a>QWidget::rect () const
</h3><p>Returns the internal geometry of the widget excluding any window frame.
See the <a href="qwidget.html#rect-prop">"rect"</a> property for details.
<h3 class=fn>void <a name="releaseKeyboard"></a>QWidget::releaseKeyboard ()
</h3>
Releases the keyboard grab.
<p> <p>See also <a href="#grabKeyboard">grabKeyboard</a>(), <a href="#grabMouse">grabMouse</a>() and <a href="#releaseMouse">releaseMouse</a>().
<h3 class=fn>void <a name="releaseMouse"></a>QWidget::releaseMouse ()
</h3>
Releases the mouse grab.
<p> <p>See also <a href="#grabMouse">grabMouse</a>(), <a href="#grabKeyboard">grabKeyboard</a>() and <a href="#releaseKeyboard">releaseKeyboard</a>().
<h3 class=fn>void <a name="repaint"></a>QWidget::repaint ( int x, int y, int w, int h, bool erase = TRUE )<tt> [slot]</tt>
</h3>
Repaints the widget directly by calling <a href="#paintEvent">paintEvent</a>() immediately,
unless updates are disabled or the widget is hidden.
<p> If <em>erase</em> is TRUE, Qt erases the area <em>(x,y,w,h)</em> before the
paintEvent() call.
<p> If <em>w</em> is negative, it is replaced with <code>width() - x</code>,
and if <em>h</em> is negative, it is replaced width <code>height() -
y</code>.
<p> We suggest using <a href="#repaint">repaint</a>() if you need an immediate repaint, for
example during animation. In almost all circumstances <a href="#update">update</a>() is
better, as it permits Qt to optimize for speed and against flicker.
<p> <b>Warning:</b> If you call repaint() in a function which may itself be
called from paintEvent(), you may see infinite recursion. The
update() function never generates recursion.
<p> <p>See also <a href="#update">update</a>(), <a href="#paintEvent">paintEvent</a>(), <a href="#updatesEnabled-prop">updatesEnabled</a> and <a href="#erase">erase</a>().
<p>Example: <a href="qwerty-example.html#x668">qwerty/qwerty.cpp</a>.
<h3 class=fn>void <a name="repaint-2"></a>QWidget::repaint ()<tt> [slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This version erases and repaints the entire widget.
<h3 class=fn>void <a name="repaint-3"></a>QWidget::repaint ( bool erase )<tt> [slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This version repaints the entire widget.
<h3 class=fn>void <a name="repaint-4"></a>QWidget::repaint ( const <a href="qrect.html">QRect</a> & r, bool erase = TRUE )<tt> [slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Repaints the widget directly by calling <a href="#paintEvent">paintEvent</a>() directly,
unless updates are disabled or the widget is hidden.
<p> Erases the widget region <em>r</em> if <em>erase</em> is TRUE.
<h3 class=fn>void <a name="repaint-5"></a>QWidget::repaint ( const <a href="qregion.html">QRegion</a> & reg, bool erase = TRUE )<tt> [slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Repaints the widget directly by calling <a href="#paintEvent">paintEvent</a>() directly,
unless updates are disabled or the widget is hidden.
<p> Erases the widget region <em>reg</em> if <em>erase</em> is TRUE.
<p> Use repaint if your widget needs to be repainted immediately, for
example when doing some animation. In all other cases, <a href="#update">update</a>() is
to be preferred. Calling update() many times in a row will generate
a single paint event.
<p> <b>Warning:</b> If you call <a href="#repaint">repaint</a>() in a function which may itself be called
from paintEvent(), you may see infinite recursion. The update() function
never generates recursion.
<p> <p>See also <a href="#update">update</a>(), <a href="#paintEvent">paintEvent</a>(), <a href="#updatesEnabled-prop">updatesEnabled</a> and <a href="#erase">erase</a>().
<h3 class=fn>void <a name="reparent"></a>QWidget::reparent ( <a href="qwidget.html">QWidget</a> * parent, WFlags f, const <a href="qpoint.html">QPoint</a> & p, bool showIt = FALSE )<tt> [virtual]</tt>
</h3>
Reparents the widget. The widget gets a new <em>parent</em>, new <a href="qt.html#WidgetFlags">widget flags</a> (<em>f</em>, but as usual, use 0) at a new position in its new
parent (<em>p</em>).
<p> If <em>showIt</em> is TRUE, <a href="#show">show</a>() is called once the widget has been
reparented.
<p> If the new parent widget is in a different top-level widget, the
reparented widget and its children are appended to the end of the
<a href="#setFocusPolicy">tab chain</a> of the new parent widget,
in the same internal order as before. If one of the moved widgets
had <a href="focus.html#keyboard-focus">keyboard focus</a>, <a href="#reparent">reparent</a>() calls <a href="#clearFocus">clearFocus</a>() for that widget.
<p> If the new parent widget is in the same top-level widget as the old
parent, reparent doesn't change the tab order or keyboard focus.
<p> <b>Warning:</b> It is extremely unlikely that you will ever need this
function. If you have a widget that changes its content dynamically,
it is far easier to use <a href="qwidgetstack.html">QWidgetStack</a> or <a href="qwizard.html">QWizard</a>.
<p> <p>See also <a href="#getWFlags">getWFlags</a>().
<h3 class=fn>void <a name="reparent-2"></a>QWidget::reparent ( <a href="qwidget.html">QWidget</a> * parent, const <a href="qpoint.html">QPoint</a> & p, bool showIt = FALSE )
</h3>This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> A convenience version of reparent that does not take <a href="qt.html#WidgetFlags">widget flags</a> as argument.
<p> Calls <a href="#reparent">reparent</a>(<em>parent</em>, <a href="#getWFlags">getWFlags</a>() & ~<a href="qt.html#WidgetFlags-enum">WType_Mask</a>, <em>p</em>, <em>showIt</em>).
<h3 class=fn>void <a name="resetInputContext"></a>QWidget::resetInputContext ()<tt> [protected]</tt>
</h3>
This function is called when the user finishes input composition,
e.g. changes focus to another widget, moves the cursor, etc.
<h3 class=fn>void <a name="resize"></a>QWidget::resize ( const <a href="qsize.html">QSize</a> & )<tt> [slot]</tt>
</h3><p>Sets the size of the widget excluding any window frame.
See the <a href="qwidget.html#size-prop">"size"</a> property for details.
<h3 class=fn>void <a name="resize-2"></a>QWidget::resize ( int w, int h )<tt> [virtual slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This corresponds to <a href="#resize">resize</a>( <a href="qsize.html">QSize</a>(<em>w</em>, <em>h</em>) ).
<h3 class=fn>void <a name="resizeEvent"></a>QWidget::resizeEvent ( <a href="qresizeevent.html">QResizeEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a
subclass to receive widget resize events. When <a href="#resizeEvent">resizeEvent</a>() is
called, the widget already has its new geometry. The old size is
accessible through <a href="qresizeevent.html#oldSize">QResizeEvent::oldSize</a>(), though.
<p> The widget will be erased and receive a paint event immediately
after processing the resize event. No drawing need be (or should be)
done inside this handler.
<p> Widgets that have been created with the <a href="qt.html#WidgetFlags-enum">WResizeNoErase</a> flag will not
be erased. Nevertheless, they will receive a paint event for their
entire area afterwards. Again, no drawing needs to be done inside
this handler.
<p> The default implementation calls <a href="#updateMask">updateMask</a>() if the widget
has <a href="#setAutoMask">automatic masking</a>
enabled.
<p> <p>See also <a href="#moveEvent">moveEvent</a>(), <a href="#event">event</a>(), <a href="#size-prop">size</a>, <a href="qresizeevent.html">QResizeEvent</a> and <a href="#paintEvent">paintEvent</a>().
<p>Examples: <a href="drawdemo-example.html#x1654">drawdemo/drawdemo.cpp</a>, <a href="mainlyQt-editor-example.html#x2583">mainlyQt/editor.cpp</a>, <a href="mainlyXt-editor-example.html#x2574">mainlyXt/editor.cpp</a>, <a href="menu-example.html#x1136">menu/menu.cpp</a>, <a href="qmag-example.html#x725">qmag/qmag.cpp</a>, <a href="scribble-example.html#x566">scribble/scribble.cpp</a> and <a href="tooltip-example.html#x167">tooltip/tooltip.cpp</a>.
<p>Reimplemented in <a href="qframe.html#resizeEvent">QFrame</a> and <a href="qglwidget.html#resizeEvent">QGLWidget</a>.
<h3 class=fn>void <a name="scroll"></a>QWidget::scroll ( int dx, int dy )
</h3> Scrolls the widget including its children <em>dx</em> pixels to the right and <em>dy</em>
downwards. Both <em>dx</em> and <em>dy</em> may be negative.
<p> After scrolling, <a href="#scroll">scroll</a>() sends a paint event for the the part that is read but
not written. For example, when scrolling 10 pixels rightwards, the leftmost
ten pixels of the widget need repainting. The paint event may be delivered
immediately or later, depending on some heuristics.
<p> <p>See also <a href="qscrollview.html">QScrollView</a>, <a href="#erase">erase</a>() and <a href="qpaintdevice.html#bitBlt">bitBlt</a>().
<h3 class=fn>void <a name="scroll-2"></a>QWidget::scroll ( int dx, int dy, const <a href="qrect.html">QRect</a> & r )
</h3> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This version only scrolls <em>r</em> and does not move the children of the widget.
<p> If <em>r</em> is empty or invalid, the result is undefined.
<p> <p>See also <a href="qscrollview.html">QScrollView</a>, <a href="#erase">erase</a>() and <a href="qpaintdevice.html#bitBlt">bitBlt</a>().
<h3 class=fn>void <a name="setAcceptDrops"></a>QWidget::setAcceptDrops ( bool on )<tt> [virtual]</tt>
</h3><p>Sets whether drop events are enabled for this widget to <em>on</em>.
See the <a href="qwidget.html#acceptDrops-prop">"acceptDrops"</a> property for details.
<h3 class=fn>void <a name="setActiveWindow"></a>QWidget::setActiveWindow ()<tt> [virtual]</tt>
</h3>
Sets the top-level widget containing this widget to be the active
window.
<p> An active window is a visible top-level window that has the keyboard input
focus.
<p> This function performs the same operation as clicking the mouse on
the title bar of a top-level window. On X11, the result depends on
the Window Manager. If you want to ensure that the window is stacked
on top as well, call <a href="#raise">raise</a>() in addition. Note that the window has be
to visible, otherwise <a href="#setActiveWindow">setActiveWindow</a>() has no effect.
<p> On Windows, if you are calling this when the application is not
currently the active one then it will not make it the active window. It
will flash the task bar entry blue to indicate that the window has done
something. This is due to Microsoft not allowing an application to
interrupt what the user is currently doing in another application.
<p> <p>See also <a href="#isActiveWindow-prop">isActiveWindow</a>, <a href="#topLevelWidget">topLevelWidget</a>() and <a href="#show">show</a>().
<p>Reimplemented in <a href="qxtwidget.html#setActiveWindow">QXtWidget</a>.
<h3 class=fn>void <a name="setAutoMask"></a>QWidget::setAutoMask ( bool )<tt> [virtual]</tt>
</h3><p>Sets whether the auto mask feature is enabled for the widget.
See the <a href="qwidget.html#autoMask-prop">"autoMask"</a> property for details.
<h3 class=fn>void <a name="setBackgroundColor"></a>QWidget::setBackgroundColor ( const <a href="qcolor.html">QColor</a> & c )<tt> [virtual]</tt>
</h3><b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
Use <a href="#setPaletteBackgroundColor">setPaletteBackgroundColor</a>() or <a href="#setEraseColor">setEraseColor</a>() instead.
<p>Examples: <a href="customlayout-example.html#x1850">customlayout/main.cpp</a>, <a href="desktop-example.html#x1756">desktop/desktop.cpp</a>, <a href="hello-example.html#x1475">hello/main.cpp</a>, <a href="movies-example.html#x1110">movies/main.cpp</a> and <a href="splitter-example.html#x403">splitter/splitter.cpp</a>.
<h3 class=fn>void <a name="setBackgroundMode"></a>QWidget::setBackgroundMode ( <a href="qt.html#BackgroundMode-enum">BackgroundMode</a> )<tt> [virtual]</tt>
</h3><p>Sets the color role used for painting the background of the widget.
See the <a href="qwidget.html#backgroundMode-prop">"backgroundMode"</a> property for details.
<h3 class=fn>void <a name="setBackgroundMode-2"></a>QWidget::setBackgroundMode ( <a href="qt.html#BackgroundMode-enum">BackgroundMode</a> m, <a href="qt.html#BackgroundMode-enum">BackgroundMode</a> visual )
</h3>This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Sets the widget's own background mode to <em>m</em> and the visual
background mode to <em>visual</em>. The visual background mode is used
with the designable properties backgroundColor, foregroundColor and
backgroundPixmap.
<p> For complex controls, the logical background mode sometimes differs
from a widget's own background mode. A spinbox for example has
PaletteBackground as background mode (typically dark grey), while
it's embedded lineedit control uses PaletteBase (typically
white). Since the lineedit covers most of the visual area of a
spinbox, it defines PaletteBase to be its <em>visual</em> background
mode. Changing the backgroundColor property thus changes the
lineedit control's background, which is exactly what the user
expects in <em>Qt Designer</em>.
<h3 class=fn>void <a name="setBackgroundOrigin"></a>QWidget::setBackgroundOrigin ( <a href="qwidget.html#BackgroundOrigin-enum">BackgroundOrigin</a> )<tt> [virtual]</tt>
</h3><p>Sets the origin of the widget's background.
See the <a href="qwidget.html#backgroundOrigin-prop">"backgroundOrigin"</a> property for details.
<h3 class=fn>void <a name="setBackgroundPixmap"></a>QWidget::setBackgroundPixmap ( const <a href="qpixmap.html">QPixmap</a> & pm )<tt> [virtual]</tt>
</h3><b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
Use <a href="#setPaletteBackgroundPixmap">setPaletteBackgroundPixmap</a>() or <a href="#setErasePixmap">setErasePixmap</a>() instead.
<p>Example: <a href="desktop-example.html#x1757">desktop/desktop.cpp</a>.
<h3 class=fn>void <a name="setBaseSize"></a>QWidget::setBaseSize ( const <a href="qsize.html">QSize</a> & )
</h3><p>Sets the base size of the widget.
See the <a href="qwidget.html#baseSize-prop">"baseSize"</a> property for details.
<h3 class=fn>void <a name="setBaseSize-2"></a>QWidget::setBaseSize ( int basew, int baseh )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This corresponds to <a href="#setBaseSize">setBaseSize</a>( <a href="qsize.html">QSize</a>(<em>basew</em>, <em>baseh</em>) ).
Sets the widgets base size to width <em>basew</em> and height <em>baseh</em>.
<h3 class=fn>void <a name="setCaption"></a>QWidget::setCaption ( const <a href="qstring.html">QString</a> & )<tt> [virtual slot]</tt>
</h3><p>Sets the window caption (title).
See the <a href="qwidget.html#caption-prop">"caption"</a> property for details.
<h3 class=fn>void <a name="setCursor"></a>QWidget::setCursor ( const <a href="qcursor.html">QCursor</a> & )<tt> [virtual]</tt>
</h3><p>Sets the cursor shape for this widget.
See the <a href="qwidget.html#cursor-prop">"cursor"</a> property for details.
<h3 class=fn>void <a name="setDisabled"></a>QWidget::setDisabled ( bool disable )<tt> [slot]</tt>
</h3>
Disables widget input events if <em>disable</em> is TRUE; otherwise enables
input events.
<p> See the <a href="#enabled-prop">enabled</a> documentation for more information.
<p> <p>See also <a href="#isEnabledTo">isEnabledTo</a>(), <a href="qkeyevent.html">QKeyEvent</a>, <a href="qmouseevent.html">QMouseEvent</a> and <a href="#enabledChange">enabledChange</a>().
<h3 class=fn>void <a name="setEnabled"></a>QWidget::setEnabled ( bool )<tt> [virtual slot]</tt>
</h3><p>Sets whether the widget is enabled.
See the <a href="qwidget.html#enabled-prop">"enabled"</a> property for details.
<h3 class=fn>void <a name="setEraseColor"></a>QWidget::setEraseColor ( const <a href="qcolor.html">QColor</a> & color )<tt> [virtual]</tt>
</h3>
Sets the erase color of the widget to <em>color</em>.
<p> The erase color is the color the widget is to be cleared to before
<a href="#paintEvent">paintEvent</a>() is called. If there is an erase pixmap (set using
<a href="#setErasePixmap">setErasePixmap</a>()), then this property has an indeterminate value.
<p> <p>See also <a href="#erasePixmap">erasePixmap</a>(), <a href="#backgroundColor">backgroundColor</a>(), <a href="#backgroundMode-prop">backgroundMode</a> and <a href="#palette-prop">palette</a>.
<h3 class=fn>void <a name="setErasePixmap"></a>QWidget::setErasePixmap ( const <a href="qpixmap.html">QPixmap</a> & pixmap )<tt> [virtual]</tt>
</h3>
Sets the widget's erase pixmap to <em>pixmap</em>.
<p> This pixmap is used to clear the widget before <a href="#paintEvent">paintEvent</a>() is called.
<h3 class=fn>void <a name="setFixedHeight"></a>QWidget::setFixedHeight ( int h )
</h3>
Sets both the minimum and maximum heights of the widget to <em>h</em>
without changing the widths. Provided for convenience.
<p> <p>See also <a href="#sizeHint-prop">sizeHint</a>, <a href="#minimumSize-prop">minimumSize</a>, <a href="#maximumSize-prop">maximumSize</a> and <a href="#setFixedSize">setFixedSize</a>().
<p>Examples: <a href="simple-qfont-demo-walkthrough.html#x2409">fonts/simple-qfont-demo/viewer.cpp</a>, <a href="layout-example.html#x1341">layout/layout.cpp</a>, <a href="qdir-example.html#x809">qdir/qdir.cpp</a> and <a href="showimg-example.html#x454">showimg/showimg.cpp</a>.
<h3 class=fn>void <a name="setFixedSize"></a>QWidget::setFixedSize ( const <a href="qsize.html">QSize</a> & s )
</h3>
Sets both the minimum and maximum sizes of the widget to <em>s</em>,
thereby preventing it from ever growing or shrinking.
<p> <p>See also <a href="#maximumSize-prop">maximumSize</a> and <a href="#minimumSize-prop">minimumSize</a>.
<h3 class=fn>void <a name="setFixedSize-2"></a>QWidget::setFixedSize ( int w, int h )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Sets the width of the widget to <em>w</em> and the height to <em>h</em>.
<h3 class=fn>void <a name="setFixedWidth"></a>QWidget::setFixedWidth ( int w )
</h3>
Sets both the minimum and maximum width of the widget to <em>w</em>
without changing the heights. Provided for convenience.
<p> <p>See also <a href="#sizeHint-prop">sizeHint</a>, <a href="#minimumSize-prop">minimumSize</a>, <a href="#maximumSize-prop">maximumSize</a> and <a href="#setFixedSize">setFixedSize</a>().
<p>Examples: <a href="ftpclient-example.html#x1036">network/ftpclient/ftpmainwindow.cpp</a>, <a href="progressbar-example.html#x827">progressbar/progressbar.cpp</a> and <a href="qdir-example.html#x810">qdir/qdir.cpp</a>.
<h3 class=fn>void <a name="setFocus"></a>QWidget::setFocus ()<tt> [virtual slot]</tt>
</h3> Gives the keyboard input focus to this widget (or its focus
proxy).
<p> First, a focus out event is sent to the focus widget (if any) to
tell it that it is about to lose the focus. Then a focus in event
is sent to this widget to tell it that it just received the focus.
(Nothing happens if the focus in and focus out widgets are the
same.)
<p> <a href="#setFocus">setFocus</a>() gives focus to a widget regardless of its focus policy,
but does not clear any keyboard grab (see <a href="#grabKeyboard">grabKeyboard</a>()).
<p> <b>Warning:</b> If you call setFocus() in a function which may itself be
called from <a href="#focusOutEvent">focusOutEvent</a>() or <a href="#focusInEvent">focusInEvent</a>(), you may experience
infinite recursion.
<p> <p>See also <a href="#focus-prop">focus</a>, <a href="#clearFocus">clearFocus</a>(), <a href="#focusInEvent">focusInEvent</a>(), <a href="#focusOutEvent">focusOutEvent</a>(), <a href="#focusPolicy-prop">focusPolicy</a>, <a href="qapplication.html#focusWidget">QApplication::focusWidget</a>(), <a href="#grabKeyboard">grabKeyboard</a>() and <a href="#grabMouse">grabMouse</a>().
<p>Examples: <a href="addressbook-example.html#x1992">addressbook/centralwidget.cpp</a>, <a href="lineedits-example.html#x1303">lineedits/lineedits.cpp</a>, <a href="popup-example.html#x897">popup/popup.cpp</a>, <a href="rot-example.html#x587">rot13/rot13.cpp</a>, <a href="t8.html#x2152">t8/main.cpp</a>, <a href="wizard-example.html#x148">wizard/wizard.cpp</a> and <a href="xform-example.html#x127">xform/xform.cpp</a>.
<h3 class=fn>void <a name="setFocusPolicy"></a>QWidget::setFocusPolicy ( <a href="qwidget.html#FocusPolicy-enum">FocusPolicy</a> )<tt> [virtual]</tt>
</h3><p>Sets the way the widget accepts keyboard focus.
See the <a href="qwidget.html#focusPolicy-prop">"focusPolicy"</a> property for details.
<h3 class=fn>void <a name="setFocusProxy"></a>QWidget::setFocusProxy ( <a href="qwidget.html">QWidget</a> * w )<tt> [virtual]</tt>
</h3> Sets this widget's focus proxy to widget <em>w</em>. If <em>w</em> is 0, this
function resets this widget to have no focus proxy.
<p> Some widgets, such as <a href="qcombobox.html">QComboBox</a>, can "have focus", but create a
child widget to actually handle the focus. QComboBox, for example,
creates a <a href="qlineedit.html">QLineEdit</a> which handles the focus.
<p> <a href="#setFocusProxy">setFocusProxy</a>() sets the widget which will actually get focus when
"this widget" gets it. If there is a focus proxy, <a href="#focusPolicy">focusPolicy</a>(),
<a href="#setFocusPolicy">setFocusPolicy</a>(), <a href="#setFocus">setFocus</a>() and <a href="#hasFocus">hasFocus</a>() all operate on the focus
proxy.
<p> <p>See also <a href="#focusProxy">focusProxy</a>().
<h3 class=fn>void <a name="setFont"></a>QWidget::setFont ( const <a href="qfont.html">QFont</a> & )<tt> [virtual]</tt>
</h3><p>Sets the font currently set for the widget.
See the <a href="qwidget.html#font-prop">"font"</a> property for details.
<p>Reimplemented in <a href="qcombobox.html#setFont">QComboBox</a>, <a href="qlabel.html#setFont">QLabel</a> and <a href="qtabdialog.html#setFont">QTabDialog</a>.
<h3 class=fn>void <a name="setFont-2"></a>QWidget::setFont ( const <a href="qfont.html">QFont</a> & f, bool )
</h3>
<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
<p> Use <a href="#setFont">setFont</a>(const <a href="qfont.html">QFont</a>& font) instead.
<h3 class=fn>void <a name="setGeometry"></a>QWidget::setGeometry ( const <a href="qrect.html">QRect</a> & )<tt> [virtual slot]</tt>
</h3><p>Sets the geometry of the widget relative to its parent and excluding the window frame.
See the <a href="qwidget.html#geometry-prop">"geometry"</a> property for details.
<h3 class=fn>void <a name="setGeometry-2"></a>QWidget::setGeometry ( int x, int y, int w, int h )<tt> [virtual slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This corresponds to <a href="#setGeometry">setGeometry</a>( <a href="qrect.html">QRect</a>(<em>x</em>, <em>y</em>, <em>w</em>, <em>h</em>) ).
<h3 class=fn>void <a name="setIcon"></a>QWidget::setIcon ( const <a href="qpixmap.html">QPixmap</a> & )<tt> [virtual slot]</tt>
</h3><p>Sets the widget icon pixmap.
See the <a href="qwidget.html#icon-prop">"icon"</a> property for details.
<h3 class=fn>void <a name="setIconText"></a>QWidget::setIconText ( const <a href="qstring.html">QString</a> & )<tt> [virtual slot]</tt>
</h3><p>Sets the widget icon text.
See the <a href="qwidget.html#iconText-prop">"iconText"</a> property for details.
<h3 class=fn>void <a name="setKeyCompression"></a>QWidget::setKeyCompression ( bool compress )<tt> [virtual protected]</tt>
</h3>
Enables key event compression, if <em>compress</em> is TRUE, and disables it
if <em>compress</em> is FALSE.
<p> By default key compression is off, so widgets receive one key press
event for each key press (or more, since autorepeat is usually on).
If you turn it on and your program doesn't keep up with key input,
Qt may try to compress key events so that more than one character can
be processed in each event.
<p> For example, a word processor widget might receive 2, 3 or more
characters in each <a href="qkeyevent.html#text">QKeyEvent::text</a>(), if the layout recalculation
takes too long for the CPU.
<p> If a widget supports multiple character unicode input, it is always
safe to turn the compression on.
<p> Note all platforms support this compression, in which case turning it
on will have no effect.
<p> <p>See also <a href="qkeyevent.html#text">QKeyEvent::text</a>().
<h3 class=fn>void <a name="setMask"></a>QWidget::setMask ( const <a href="qbitmap.html">QBitmap</a> & bitmap )<tt> [virtual]</tt>
</h3>
Causes only the pixels of the widget for which <em>bitmap</em>
has a corresponding 1 bit
to be visible. If the region includes pixels outside the
<a href="#rect">rect</a>() of the widget, window system controls in that area
may or may not be visible, depending on the platform.
<p> Note that this effect can be slow if the region is particularly
complex.
<p> <p>See also <a href="#clearMask">clearMask</a>().
<h3 class=fn>void <a name="setMask-2"></a>QWidget::setMask ( const <a href="qregion.html">QRegion</a> & region )<tt> [virtual]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Causes only the parts of the widget which overlap <em>region</em>
to be visible. If the region includes pixels outside the
<a href="#rect">rect</a>() of the widget, window system controls in that area
may or may not be visible, depending on the platform.
<p> Note that this effect can be slow if the region is particularly
complex.
<p> <p>See also <a href="#clearMask">clearMask</a>().
<h3 class=fn>void <a name="setMaximumHeight"></a>QWidget::setMaximumHeight ( int maxh )
</h3><p>Sets the widget's maximum height to <em>maxh</em>.
See the <a href="qwidget.html#maximumHeight-prop">"maximumHeight"</a> property for details.
<h3 class=fn>void <a name="setMaximumSize"></a>QWidget::setMaximumSize ( const <a href="qsize.html">QSize</a> & )
</h3><p>Sets the widget's maximum size.
See the <a href="qwidget.html#maximumSize-prop">"maximumSize"</a> property for details.
<h3 class=fn>void <a name="setMaximumSize-2"></a>QWidget::setMaximumSize ( int maxw, int maxh )<tt> [virtual]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This function corresponds to <a href="#setMaximumSize">setMaximumSize</a>( <a href="qsize.html">QSize</a>(<em>maxw</em>, <em>maxh</em>) ).
Sets the maximum width to <em>maxw</em> and the maximum height to <em>maxh</em>.
<h3 class=fn>void <a name="setMaximumWidth"></a>QWidget::setMaximumWidth ( int maxw )
</h3><p>Sets the widget's maximum width to <em>maxw</em>.
See the <a href="qwidget.html#maximumWidth-prop">"maximumWidth"</a> property for details.
<h3 class=fn>void <a name="setMicroFocusHint"></a>QWidget::setMicroFocusHint ( int x, int y, int width, int height, bool text = TRUE, <a href="qfont.html">QFont</a> * f = 0 )<tt> [virtual protected]</tt>
</h3>
When a widget gets focus, it should call setMicroFocusHint for some
appropriate position and size - <em>x</em>, <em>y</em> and <em>width</em> by <em>height</em>. This
has no <em>visual</em> effect, it just provides hints to any
system-specific input handling tools.
<p> The <em>text</em> argument should be TRUE if this is a position for text
input.
<p> In the Windows version of Qt, this method sets the system caret, which is
used for user Accessibility focus handling. If <em>text</em> is TRUE, it also
sets the IME composition window in Far East Asian language input systems.
<p> In the X11 version of Qt, if <em>text</em> is TRUE, this method sets the
XIM "spot" point for complex language input handling.
<p> The font parameter, <em>f</em>, is currently unused.
<p> <p>See also <a href="#microFocusHint-prop">microFocusHint</a>.
<h3 class=fn>void <a name="setMinimumHeight"></a>QWidget::setMinimumHeight ( int minh )
</h3><p>Sets the widget's minimum height to <em>minh</em>.
See the <a href="qwidget.html#minimumHeight-prop">"minimumHeight"</a> property for details.
<h3 class=fn>void <a name="setMinimumSize"></a>QWidget::setMinimumSize ( const <a href="qsize.html">QSize</a> & )
</h3><p>Sets the widget's minimum size.
See the <a href="qwidget.html#minimumSize-prop">"minimumSize"</a> property for details.
<h3 class=fn>void <a name="setMinimumSize-2"></a>QWidget::setMinimumSize ( int minw, int minh )<tt> [virtual]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> This function corresponds to <a href="#setMinimumSize">setMinimumSize</a>( <a href="qsize.html">QSize</a>(minw, minh) ).
Sets the minimum width to <em>minw</em> and the minimum height to <em>minh</em>.
<h3 class=fn>void <a name="setMinimumWidth"></a>QWidget::setMinimumWidth ( int minw )
</h3><p>Sets the widget's minimum width to <em>minw</em>.
See the <a href="qwidget.html#minimumWidth-prop">"minimumWidth"</a> property for details.
<h3 class=fn>void <a name="setMouseTracking"></a>QWidget::setMouseTracking ( bool enable )<tt> [virtual slot]</tt>
</h3><p>Sets whether mouse tracking is enabled for this widget to <em>enable</em>.
See the <a href="qwidget.html#mouseTracking-prop">"mouseTracking"</a> property for details.
<h3 class=fn>void <a name="setPalette"></a>QWidget::setPalette ( const <a href="qpalette.html">QPalette</a> & )<tt> [virtual]</tt>
</h3><p>Sets the widget's palette.
See the <a href="qwidget.html#palette-prop">"palette"</a> property for details.
<p>Reimplemented in <a href="qcombobox.html#setPalette">QComboBox</a>, <a href="qscrollbar.html#setPalette">QScrollBar</a> and <a href="qslider.html#setPalette">QSlider</a>.
<h3 class=fn>void <a name="setPalette-2"></a>QWidget::setPalette ( const <a href="qpalette.html">QPalette</a> & p, bool )
</h3>
<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
<p> Use <a href="#setPalette">setPalette</a>( const <a href="qpalette.html">QPalette</a>& p ) instead.
<h3 class=fn>void <a name="setPaletteBackgroundColor"></a>QWidget::setPaletteBackgroundColor ( const <a href="qcolor.html">QColor</a> & )<tt> [virtual]</tt>
</h3><p>Sets the background color of the widget.
See the <a href="qwidget.html#paletteBackgroundColor-prop">"paletteBackgroundColor"</a> property for details.
<h3 class=fn>void <a name="setPaletteBackgroundPixmap"></a>QWidget::setPaletteBackgroundPixmap ( const <a href="qpixmap.html">QPixmap</a> & )<tt> [virtual]</tt>
</h3><p>Sets the background pixmap of the widget.
See the <a href="qwidget.html#paletteBackgroundPixmap-prop">"paletteBackgroundPixmap"</a> property for details.
<h3 class=fn>void <a name="setPaletteForegroundColor"></a>QWidget::setPaletteForegroundColor ( const <a href="qcolor.html">QColor</a> & )
</h3><p>Sets the foreground color of the widget.
See the <a href="qwidget.html#paletteForegroundColor-prop">"paletteForegroundColor"</a> property for details.
<h3 class=fn>void <a name="setSizeIncrement"></a>QWidget::setSizeIncrement ( const <a href="qsize.html">QSize</a> & )
</h3><p>Sets the size increment of the widget.
See the <a href="qwidget.html#sizeIncrement-prop">"sizeIncrement"</a> property for details.
<h3 class=fn>void <a name="setSizeIncrement-2"></a>QWidget::setSizeIncrement ( int w, int h )<tt> [virtual]</tt>
</h3> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Sets the x (width) size increment to <em>w</em> and the y (height) size
increment to <em>h</em>.
<h3 class=fn>void <a name="setSizePolicy"></a>QWidget::setSizePolicy ( <a href="qsizepolicy.html">QSizePolicy</a> )<tt> [virtual]</tt>
</h3><p>Sets the default layout behavior of the widget.
See the <a href="qwidget.html#sizePolicy-prop">"sizePolicy"</a> property for details.
<h3 class=fn>void <a name="setStyle"></a>QWidget::setStyle ( <a href="qstyle.html">QStyle</a> * style )
</h3>
Sets the widget's GUI style to <em>style</em>. Ownership of the style
object is not transferred.
<p> If no style is set, the widget uses the application's style
<a href="qapplication.html#style">QApplication::style</a>() instead.
<p> Setting a widget's style has no effect on existing or future
child widgets.
<p> <b>Warning:</b> This function is particularly useful for demonstration
purposes, where you want to show Qt's styling capabilities. Real
applications should avoid it and use one consistent GUI style
instead.
<p> <p>See also <a href="#style">style</a>(), <a href="qstyle.html">QStyle</a>, <a href="qapplication.html#style">QApplication::style</a>() and <a href="qapplication.html#setStyle">QApplication::setStyle</a>().
<p>Examples: <a href="grapher-nsplugin-example.html#x2630">grapher/grapher.cpp</a> and <a href="progressbar-example.html#x828">progressbar/progressbar.cpp</a>.
<h3 class=fn><a href="qstyle.html">QStyle</a> * <a name="setStyle-2"></a>QWidget::setStyle ( const <a href="qstring.html">QString</a> & style )
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Sets the widget's GUI style to <em>style</em> using the <a href="qstylefactory.html">QStyleFactory</a>.
<h3 class=fn>void <a name="setTabOrder"></a>QWidget::setTabOrder ( <a href="qwidget.html">QWidget</a> * first, <a href="qwidget.html">QWidget</a> * second )<tt> [static]</tt>
</h3>
Moves the <em>second</em> widget around the ring of focus widgets
so that <a href="focus.html#keyboard-focus">keyboard focus</a> moves from <em>first</em> widget to <em>second</em>
widget when Tab is pressed.
<p> Note that since the tab order of the <em>second</em> widget is changed,
you should order a chain like this:
<p> <pre>
<a href="#setTabOrder">setTabOrder</a>( a, b ); // a to b
<a href="#setTabOrder">setTabOrder</a>( b, c ); // a to b to c
<a href="#setTabOrder">setTabOrder</a>( c, d ); // a to b to c to d
</pre>
<p> <em>not</em> like this:
<p> <pre>
<a href="#setTabOrder">setTabOrder</a>( c, d ); // c to d WRONG
<a href="#setTabOrder">setTabOrder</a>( a, b ); // a to b AND c to d
<a href="#setTabOrder">setTabOrder</a>( b, c ); // a to b to c, but not c to d
</pre>
<p> If either <em>first</em> or <em>second</em> has a focus proxy, <a href="#setTabOrder">setTabOrder</a>()
substitutes its/their proxies.
<p> <p>See also <a href="#focusPolicy-prop">focusPolicy</a> and <a href="#setFocusProxy">setFocusProxy</a>().
<p>Example: <a href="customlayout-example.html#x1852">customlayout/main.cpp</a>.
<h3 class=fn>void <a name="setUpdatesEnabled"></a>QWidget::setUpdatesEnabled ( bool enable )<tt> [virtual slot]</tt>
</h3><p>Sets whether updates are enabled to <em>enable</em>.
See the <a href="qwidget.html#updatesEnabled-prop">"updatesEnabled"</a> property for details.
<h3 class=fn>void <a name="setWFlags"></a>QWidget::setWFlags ( WFlags f )<tt> [virtual protected]</tt>
</h3>
<p> Sets the <a href="qt.html#WidgetFlags">widget flags</a> <em>f</em>.
<p> Widget flags are a combination of <a href="qt.html#WidgetFlags-enum">Qt::WidgetFlags</a>.
<p> <p>See also <a href="#testWFlags">testWFlags</a>(), <a href="#getWFlags">getWFlags</a>() and <a href="#clearWFlags">clearWFlags</a>().
<h3 class=fn>void <a name="show"></a>QWidget::show ()<tt> [virtual slot]</tt>
</h3>
Shows the widget and its child widgets.
<p> If its size or position has changed, Qt guarantees that a widget gets
move and resize events just before it is shown.
<p> You almost never have to reimplement this function. If you need to
change some settings before a widget is shown, use <a href="#showEvent">showEvent</a>()
instead. If you need to do some delayed initialization use <a href="#polish">polish</a>().
<p> <p>See also <a href="#showEvent">showEvent</a>(), <a href="#hide">hide</a>(), <a href="#showMinimized">showMinimized</a>(), <a href="#showMaximized">showMaximized</a>(), <a href="#showNormal">showNormal</a>(), <a href="#visible-prop">visible</a> and <a href="#polish">polish</a>().
<p>Examples: <a href="canvas-example.html#x2568">canvas/main.cpp</a>, <a href="simple-qfont-demo-walkthrough.html#x2413">fonts/simple-qfont-demo/simple-qfont-demo.cpp</a>, <a href="ftpclient-example.html#x1037">network/ftpclient/ftpmainwindow.cpp</a>, <a href="popup-example.html#x900">popup/popup.cpp</a>, <a href="t1.html#x2099">t1/main.cpp</a>, <a href="t3.html#x2115">t3/main.cpp</a> and <a href="t4.html#x2122">t4/main.cpp</a>.
<p>Reimplemented in <a href="qdialog.html#show">QDialog</a> and <a href="qmenubar.html#show">QMenuBar</a>.
<h3 class=fn>void <a name="showEvent"></a>QWidget::showEvent ( <a href="qshowevent.html">QShowEvent</a> * )<tt> [virtual protected]</tt>
</h3>
This event handler can be reimplemented in a
subclass to receive widget show events.
<p> Non-spontaneous show events are sent to widgets immediately before
they are shown. Spontaneous show events of top-level widgets are
delivered afterwards.
<p> <p>See also <a href="#event">event</a>() and <a href="qshowevent.html">QShowEvent</a>.
<p>Example: <a href="qdir-example.html#x811">qdir/qdir.cpp</a>.
<h3 class=fn>void <a name="showFullScreen"></a>QWidget::showFullScreen ()<tt> [slot]</tt>
</h3>
Shows the widget in full-screen mode.
<p> Calling this function only effects top-level widgets.
<p> To return from full-screen mode, call <a href="#showNormal">showNormal</a>().
<p> Full-screen mode works fine under Windows, but has certain problems
under X. These problems are due to limitations of the ICCCM
protocol that specifies the communication between X11 clients and
the window manager. ICCCM simply does not understand the concept of
non-decorated full-screen windows. Therefore, the best we can do is
to request a borderless window and place and resize it to fill the
entire screen. Depending on the window manager, this may or may not
work. The borderless window is requested using MOTIF hints, which
are at least partially supported by virtually all modern window
managers.
<p> An alternative would be to bypass the window manager entirely and
create a window with the WX11BypassWM flag. This has other severe
problems though, like totally broken <a href="focus.html#keyboard-focus">keyboard focus</a> and very
strange effects on desktop changes or when the user raises other
windows.
<p> Future X11 window managers that follow modern post-ICCCM
specifications may support full-screen mode properly.
<p> <p>See also <a href="#showNormal">showNormal</a>(), <a href="#showMaximized">showMaximized</a>(), <a href="#show">show</a>(), <a href="#hide">hide</a>() and <a href="#visible-prop">visible</a>.
<h3 class=fn>void <a name="showMaximized"></a>QWidget::showMaximized ()<tt> [virtual slot]</tt>
</h3>
Shows the widget maximized.
<p> Calling this function has no effect for other than <a href="#isTopLevel">top-level widgets</a>.
<p> On X11, this function may not work properly with certain window
managers. See the <a href="geometry.html">Window Geometry
documentation</a> for details on why.
<p> <p>See also <a href="#showNormal">showNormal</a>(), <a href="#showMinimized">showMinimized</a>(), <a href="#show">show</a>(), <a href="#hide">hide</a>() and <a href="#visible-prop">visible</a>.
<p>Examples: <a href="canvas-example.html#x2569">canvas/main.cpp</a>, <a href="helpviewer-example.html#x1455">helpviewer/main.cpp</a>, <a href="mdi-example.html#x1187">mdi/application.cpp</a>, <a href="qwerty-example.html#x684">qwerty/main.cpp</a>, <a href="qwerty-example.html#x675">qwerty/qwerty.cpp</a> and <a href="scribble-example.html#x574">scribble/main.cpp</a>.
<h3 class=fn>void <a name="showMinimized"></a>QWidget::showMinimized ()<tt> [virtual slot]</tt>
</h3>
Shows the widget minimized, as an icon.
<p> Calling this function has no effect for other than <a href="#isTopLevel">top-level widgets</a>.
<p> <p>See also <a href="#showNormal">showNormal</a>(), <a href="#showMaximized">showMaximized</a>(), <a href="#show">show</a>(), <a href="#hide">hide</a>(), <a href="#visible-prop">visible</a> and <a href="#minimized-prop">minimized</a>.
<h3 class=fn>void <a name="showNormal"></a>QWidget::showNormal ()<tt> [virtual slot]</tt>
</h3>
Restores the widget after it has been maximized or minimized.
<p> Calling this function has no effect for other than <a href="#isTopLevel">top-level widgets</a>.
<p> <p>See also <a href="#showMinimized">showMinimized</a>(), <a href="#showMaximized">showMaximized</a>(), <a href="#show">show</a>(), <a href="#hide">hide</a>() and <a href="#visible-prop">visible</a>.
<p>Example: <a href="mdi-example.html#x1188">mdi/application.cpp</a>.
<h3 class=fn><a href="qsize.html">QSize</a> <a name="size"></a>QWidget::size () const
</h3><p>Returns the size of the widget excluding any window frame.
See the <a href="qwidget.html#size-prop">"size"</a> property for details.
<h3 class=fn><a href="qsize.html">QSize</a> <a name="sizeHint"></a>QWidget::sizeHint () const<tt> [virtual]</tt>
</h3><p>Returns the recommended size for the widget.
See the <a href="qwidget.html#sizeHint-prop">"sizeHint"</a> property for details.
<p>Reimplemented in <a href="qsizegrip.html#sizeHint">QSizeGrip</a>.
<h3 class=fn><a href="qsize.html">QSize</a> <a name="sizeIncrement"></a>QWidget::sizeIncrement () const
</h3><p>Returns the size increment of the widget.
See the <a href="qwidget.html#sizeIncrement-prop">"sizeIncrement"</a> property for details.
<h3 class=fn><a href="qsizepolicy.html">QSizePolicy</a> <a name="sizePolicy"></a>QWidget::sizePolicy () const<tt> [virtual]</tt>
</h3><p>Returns the default layout behavior of the widget.
See the <a href="qwidget.html#sizePolicy-prop">"sizePolicy"</a> property for details.
<h3 class=fn>void <a name="stackUnder"></a>QWidget::stackUnder ( <a href="qwidget.html">QWidget</a> * w )<tt> [slot]</tt>
</h3>
Places the widget under <em>w</em> in the parent widget's stack.
<p> To make this work, the widget itself and <em>w</em> have to be siblings.
<p> <p>See also <a href="#raise">raise</a>() and <a href="#lower">lower</a>().
<h3 class=fn><a href="qstyle.html">QStyle</a> & <a name="style"></a>QWidget::style () const
</h3>
Returns the GUI style for this widget
<p> <p>See also <a href="#setStyle">QWidget::setStyle</a>(), <a href="qapplication.html#setStyle">QApplication::setStyle</a>() and <a href="qapplication.html#style">QApplication::style</a>().
<h3 class=fn>void <a name="styleChange"></a>QWidget::styleChange ( <a href="qstyle.html">QStyle</a> & oldStyle )<tt> [virtual protected]</tt>
</h3>
This virtual function is called when the style of the widgets.
changes. <em>oldStyle</em> is the
previous GUI style; you can get the new style from <a href="#style">style</a>().
<p> Reimplement this function if your widget needs to know when its GUI
style changes. You will almost certainly need to update the widget
using <a href="#update">update</a>().
<p> The default implementation updates the widget including its
geometry.
<p> <p>See also <a href="qapplication.html#setStyle">QApplication::setStyle</a>(), <a href="#style">style</a>(), <a href="#update">update</a>() and <a href="#updateGeometry">updateGeometry</a>().
<h3 class=fn>void <a name="tabletEvent"></a>QWidget::tabletEvent ( <a href="qtabletevent.html">QTabletEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive tablet events for the widget.
<p> If you reimplement this handler, it is very important that you <a href="qtabletevent.html">ignore()</a> the event if you do not handle it, so
that the widget's parent can interpret it.
<p> The default implementation ignores the event.
<p> <p>See also <a href="qtabletevent.html#ignore">QTabletEvent::ignore</a>(), <a href="qtabletevent.html#accept">QTabletEvent::accept</a>(), <a href="#event">event</a>() and <a href="qtabletevent.html">QTabletEvent</a>.
<h3 class=fn>WFlags <a name="testWFlags"></a>QWidget::testWFlags ( WFlags f ) const
</h3>
<p> Returns the bitwise AND of the <a href="qt.html#WidgetFlags">widget flags</a> and <em>f</em>.
<p> Widget flags are a combination of <a href="qt.html#WidgetFlags-enum">Qt::WidgetFlags</a>.
<p> <p>See also <a href="#getWFlags">getWFlags</a>(), <a href="#setWFlags">setWFlags</a>() and <a href="#clearWFlags">clearWFlags</a>().
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="topLevelWidget"></a>QWidget::topLevelWidget () const
</h3>
Returns the top-level widget for this widget, i.e. the next ancestor
widget that has (or may have) a window-system frame.
<p> If the widget is a top-level, the widget itself is returned.
<p> Typical usage is changing the window caption:
<p> <pre>
aWidget->topLevelWidget()->setCaption( "New Caption" );
</pre>
<p> <p>See also <a href="#isTopLevel-prop">isTopLevel</a>.
<h3 class=fn>void <a name="unsetCursor"></a>QWidget::unsetCursor ()<tt> [virtual]</tt>
</h3><p>Resets the cursor shape for this widget.
See the <a href="qwidget.html#cursor-prop">"cursor"</a> property for details.
<h3 class=fn>void <a name="unsetFont"></a>QWidget::unsetFont ()
</h3><p>Resets the font currently set for the widget.
See the <a href="qwidget.html#font-prop">"font"</a> property for details.
<h3 class=fn>void <a name="unsetPalette"></a>QWidget::unsetPalette ()
</h3><p>Resets the widget's palette.
See the <a href="qwidget.html#palette-prop">"palette"</a> property for details.
<h3 class=fn>void <a name="update"></a>QWidget::update ()<tt> [slot]</tt>
</h3>
Updates the widget unless updates are disabled or the widget is hidden.
<p> This function does not cause an immediate repaint - rather, it
schedules a paint event for processing when Qt returns to the main
event loop. This permits Qt to optimize for more speed and less
flicker than a call to <a href="#repaint">repaint</a>() does.
<p> Calling <a href="#update">update</a>() several times normally results in just one
<a href="#paintEvent">paintEvent</a>() call.
<p> Qt normally erases the widget's area before the paintEvent() call.
Only if the WRepaintNoErase widget flag is set, the widget itself is
responsible for painting all its pixels.
<p> <p>See also <a href="#repaint">repaint</a>(), <a href="#paintEvent">paintEvent</a>(), <a href="#updatesEnabled-prop">updatesEnabled</a>, <a href="#erase">erase</a>() and <a href="#setWFlags">setWFlags</a>().
<p>Examples: <a href="desktop-example.html#x1758">desktop/desktop.cpp</a> and <a href="scrollview-example.html#x515">scrollview/scrollview.cpp</a>.
<h3 class=fn>void <a name="update-2"></a>QWidget::update ( int x, int y, int w, int h )<tt> [slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Updates a rectangle (<em>x</em>, <em>y</em>, <em>w</em>, <em>h</em>) inside the widget
unless updates are disabled or the widget is hidden.
<p> This function does not cause an immediate repaint - rather, it
schedules a paint event for processing when Qt returns to the main
event loop. This permits Qt to optimize for more speed and less
flicker and a call to <a href="#repaint">repaint</a>() does.
<p> Calling <a href="#update">update</a>() several times normally results in just one
<a href="#paintEvent">paintEvent</a>() call.
<p> If <em>w</em> is negative, it is replaced with <tt>width() - x</tt>.
If <em>h</em> is negative, it is replaced width <tt>height() - y</tt>.
<p> Qt normally erases the specified area before the paintEvent() call.
Only if the WRepaintNoErase widget flag is set, the widget itself is
responsible for painting all its pixels.
<p> <p>See also <a href="#repaint">repaint</a>(), <a href="#paintEvent">paintEvent</a>(), <a href="#updatesEnabled-prop">updatesEnabled</a> and <a href="#erase">erase</a>().
<h3 class=fn>void <a name="update-3"></a>QWidget::update ( const <a href="qrect.html">QRect</a> & r )<tt> [slot]</tt>
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Updates a rectangle <em>r</em> inside the widget
unless updates are disabled or the widget is hidden.
<p> This function does not cause an immediate repaint - rather, it
schedules a paint event for processing when Qt returns to the main
event loop. This permits Qt to optimize for more speed and less
flicker and a call to <a href="#repaint">repaint</a>() does.
<p> Calling <a href="#update">update</a>() several times normally results in just one
<a href="#paintEvent">paintEvent</a>() call.
<h3 class=fn>void <a name="updateGeometry"></a>QWidget::updateGeometry ()
</h3>
Notifies the layout system that this widget has changed and may need
to change geometry.
<p> Call this function if the <a href="#sizeHint">sizeHint</a>() or <a href="#sizePolicy">sizePolicy</a>() have changed.
<p> For explicitly hidden widgets, <a href="#updateGeometry">updateGeometry</a>() is a no-op. The
layout system will be notified as soon as the widget is shown.
<h3 class=fn>void <a name="updateMask"></a>QWidget::updateMask ()<tt> [virtual protected]</tt>
</h3>
This function can be reimplemented in a subclass to support
transparent widgets. It is supposed to be called whenever a widget
changes state in a way that the shape mask has to be recalculated.
<p> <p>See also <a href="#autoMask-prop">autoMask</a>, <a href="#setMask">setMask</a>() and <a href="#clearMask">clearMask</a>().
<h3 class=fn><a href="qrect.html">QRect</a> <a name="visibleRect"></a>QWidget::visibleRect () const
</h3><p>Returns the currently visible rectangle of the widget.
See the <a href="qwidget.html#visibleRect-prop">"visibleRect"</a> property for details.
<h3 class=fn>void <a name="wheelEvent"></a>QWidget::wheelEvent ( <a href="qwheelevent.html">QWheelEvent</a> * e )<tt> [virtual protected]</tt>
</h3>
This event handler, for event <em>e</em>, can be reimplemented in a
subclass to receive wheel events for the widget.
<p> If you reimplement this handler, it is very important that you <a href="qwheelevent.html">ignore()</a> the event if you do not handle it, so
that the widget's parent can interpret it.
<p> The default implementation ignores the event.
<p> <p>See also <a href="qwheelevent.html#ignore">QWheelEvent::ignore</a>(), <a href="qwheelevent.html#accept">QWheelEvent::accept</a>(), <a href="#event">event</a>() and <a href="qwheelevent.html">QWheelEvent</a>.
<h3 class=fn>int <a name="width"></a>QWidget::width () const
</h3><p>Returns the width of the widget excluding any window frame.
See the <a href="qwidget.html#width-prop">"width"</a> property for details.
<h3 class=fn>WId <a name="winId"></a>QWidget::winId () const
</h3>
<p> Returns the window system identifier of the widget.
<p> Portable in principle, but if you use it you are probably about to do
something non-portable. Be careful.
<p> <p>See also <a href="#find">find</a>().
<p>Example: <a href="mainlyXt-editor-example.html#x2575">mainlyXt/editor.cpp</a>.
<h3 class=fn>void <a name="windowActivationChange"></a>QWidget::windowActivationChange ( bool oldActive )<tt> [virtual protected]</tt>
</h3>
<p> This virtual function is called for a widget when its window is
activated or deactivated by the window system. <em>oldActive</em> is the
previous state; you can get the new setting from <a href="#isActiveWindow">isActiveWindow</a>().
<p> Reimplement this function if your widget needs to know when its
window becomes activated or deactivated.
<p> The default implementation updates the visible part of the widget if
the inactive and the active colorgroup are different for colors
other than the highlight and link colors.
<p> <p>See also <a href="#setActiveWindow">setActiveWindow</a>(), <a href="#isActiveWindow-prop">isActiveWindow</a>, <a href="#update">update</a>() and <a href="#palette-prop">palette</a>.
<h3 class=fn>int <a name="x"></a>QWidget::x () const
</h3><p>Returns the x coordinate of the widget relative to its parent including any window frame.
See the <a href="qwidget.html#x-prop">"x"</a> property for details.
<h3 class=fn>int <a name="y"></a>QWidget::y () const
</h3><p>Returns the y coordinate of the widget relative to its parent and including any window frame.
See the <a href="qwidget.html#y-prop">"y"</a> property for details.
<hr><h2>Property Documentation</h2>
<h3 class=fn>bool <a name="acceptDrops-prop"></a>acceptDrops</h3> <p>This property holds whether drop events are enabled for this widget.
<p>Setting this property to TRUE announces to the system that this
widget <em>may</em> be able to accept drop events.
<p> If the widgets is the desktop (<a href="#isDesktop">QWidget::isDesktop</a>()), this may fail
if another application is using the desktop; you can call
<a href="#acceptDrops">acceptDrops</a>() to test if this occurs.
<p>Set this property's value with <a href="#setAcceptDrops">setAcceptDrops</a>() and get this property's value with <a href="#acceptDrops">acceptDrops</a>().
<h3 class=fn>bool <a name="autoMask-prop"></a>autoMask</h3> <p>This property holds whether the auto mask feature is enabled for the widget.
<p>Transparent widgets use a mask to define their visible region.
QWidget has some built-in support to make the task of recalculating
the mask easier. When setting auto mask to TRUE, <a href="#updateMask">updateMask</a>() will
be called whenever the widget is resized or changes its focus
state. Note that you must reimplement updateMask() (which should
include a call to <a href="#setMask">setMask</a>()) or nothing will happen.
<p> Note: when you re-implement <a href="#resizeEvent">resizeEvent</a>(), <a href="#focusInEvent">focusInEvent</a>() or
<a href="#focusOutEvent">focusOutEvent</a>() in your custom widgets and still want to ensure
that the auto mask calculation works, you should add:
<p> <pre>
if ( <a href="#autoMask">autoMask</a>() )
<a href="#updateMask">updateMask</a>();
</pre>
<p> at the end of your event handlers. This is true for all member
functions that change the appearance of the widget in a way that
requires a recalculation of the mask.
<p> While being a technically appealing concept, masks have a big
drawback: when using complex masks that cannot be expressed easily
with relatively simple regions, they can be very slow on some
window systems. The classic example is a transparent label. The
complex shape of its contents makes it necessary to represent its
mask by a bitmap, which consumes both memory and time. If all you
want is to blend the background of several neighboring widgets
together seamlessly, you will probably want to use
<a href="#setBackgroundOrigin">setBackgroundOrigin</a>() rather than a mask.
<p> <p>See also <a href="#autoMask-prop">autoMask</a>, <a href="#updateMask">updateMask</a>(), <a href="#setMask">setMask</a>(), <a href="#clearMask">clearMask</a>() and <a href="#backgroundOrigin-prop">backgroundOrigin</a>.
<p>Set this property's value with <a href="#setAutoMask">setAutoMask</a>() and get this property's value with <a href="#autoMask">autoMask</a>().
<h3 class=fn><a href="qbrush.html">QBrush</a> <a name="backgroundBrush-prop"></a>backgroundBrush</h3> <p>This property holds the widget's background brush.
<p>The background brush depends on a widget's palette and its
background mode.
<p> <p>See also <a href="#backgroundColor">backgroundColor</a>(), <a href="#backgroundPixmap">backgroundPixmap</a>(), <a href="#eraseColor">eraseColor</a>(), <a href="#palette-prop">palette</a> and <a href="qapplication.html#setPalette">QApplication::setPalette</a>().
<p>Get this property's value with <a href="#backgroundBrush">backgroundBrush</a>().
<h3 class=fn><a href="qt.html#BackgroundMode-enum">BackgroundMode</a> <a name="backgroundMode-prop"></a>backgroundMode</h3> <p>This property holds the color role used for painting the background of the widget.
<p>setPaletteBackgroundColor() reads this property to determine which entry of
the <a href="#palette-prop">palette</a> to set.
<p> For most widgets the default suffices (PaletteBackground, typically
gray), but some need to use PaletteBase (the background color for
text output, typically white) or another role.
<p> <a href="qlistbox.html">QListBox</a>, which is "sunken" and uses the base color to contrast with
its environment, does this in its constructor:
<p> <pre>
<a href="#setBackgroundMode">setBackgroundMode</a>( <a href="qt.html#BackgroundMode-enum">PaletteBase</a> );
</pre>
<p> You will never need to set the background mode of a built-in widget
in Qt, but you might consider setting it in your custom widgets, so
that <a href="#setPaletteBackgroundColor">setPaletteBackgroundColor</a>() works as expected.
<p> Note that two of the BackgroundMode values make no sense for
<a href="#setBackgroundMode">setBackgroundMode</a>(), namely FixedPixmap and FixedColor. You have to
call <a href="#setBackgroundPixmap">setBackgroundPixmap</a>() and setPaletteBackgroundColor() instead.
<p>Set this property's value with <a href="#setBackgroundMode">setBackgroundMode</a>() and get this property's value with <a href="#backgroundMode">backgroundMode</a>().
<h3 class=fn><a href="qwidget.html#BackgroundOrigin-enum">BackgroundOrigin</a> <a name="backgroundOrigin-prop"></a>backgroundOrigin</h3> <p>This property holds the origin of the widget's background.
<p>The origin is either WidgetOrigin (the default), ParentOrigin or
WindowOrigin.
<p> This makes a difference only if the widget has a background pixmap,
in which case positioning matters. Using WindowOrigin for several
neighboring widgets makes the background blend together seamlessly.
<p> <p>See also <a href="#backgroundPixmap">backgroundPixmap</a>() and <a href="#backgroundMode-prop">backgroundMode</a>.
<p>Set this property's value with <a href="#setBackgroundOrigin">setBackgroundOrigin</a>() and get this property's value with <a href="#backgroundOrigin">backgroundOrigin</a>().
<h3 class=fn><a href="qsize.html">QSize</a> <a name="baseSize-prop"></a>baseSize</h3> <p>This property holds the base size of the widget.
<p>The base size is used to calculate a proper widget size in case the
widget defines <a href="#sizeIncrement">sizeIncrement</a>().
<p> <p>See also <a href="#sizeIncrement-prop">sizeIncrement</a>.
<p>Set this property's value with <a href="#setBaseSize">setBaseSize</a>() and get this property's value with <a href="#baseSize">baseSize</a>().
<h3 class=fn><a href="qstring.html">QString</a> <a name="caption-prop"></a>caption</h3> <p>This property holds the window caption (title).
<p>This property only makes sense for top-level widgets. If no caption
has been set, the caption is QString::null.
<p> <p>See also <a href="#icon-prop">icon</a> and <a href="#iconText-prop">iconText</a>.
<p>Set this property's value with <a href="#setCaption">setCaption</a>() and get this property's value with <a href="#caption">caption</a>().
<h3 class=fn><a href="qrect.html">QRect</a> <a name="childrenRect-prop"></a>childrenRect</h3> <p>This property holds the bounding rectangle of the widget's children.
<p>Hidden children are excluded.
<p> <p>See also <a href="#childrenRegion-prop">childrenRegion</a> and <a href="#geometry-prop">geometry</a>.
<p>Get this property's value with <a href="#childrenRect">childrenRect</a>().
<h3 class=fn><a href="qregion.html">QRegion</a> <a name="childrenRegion-prop"></a>childrenRegion</h3> <p>This property holds the combined region occupied by the widget's children.
<p>Hidden children are excluded.
<p> <p>See also <a href="#childrenRect-prop">childrenRect</a> and <a href="#geometry-prop">geometry</a>.
<p>Get this property's value with <a href="#childrenRegion">childrenRegion</a>().
<h3 class=fn><a href="qcolorgroup.html">QColorGroup</a> <a name="colorGroup-prop"></a>colorGroup</h3> <p>This property holds the current color group of the widget palette.
<p>The color group is determined by the state of the widget. A
disabled widget has the <a href="qpalette.html#disabled">QPalette::disabled</a>() color group, a widget
with keyboard focus has the <a href="qpalette.html#active">QPalette::active</a>() color group, and an
inactive widget has the <a href="qpalette.html#inactive">QPalette::inactive</a>() color group.
<p> <p>See also <a href="#palette-prop">palette</a>.
<p>Get this property's value with <a href="#colorGroup">colorGroup</a>().
<h3 class=fn><a href="qcursor.html">QCursor</a> <a name="cursor-prop"></a>cursor</h3> <p>This property holds the cursor shape for this widget.
<p>The mouse cursor will assume this shape when it's over this widget.
See the <a href="qt.html#CursorShape-enum">list of predefined cursor
objects</a> for a range of useful shapes.
<p> An editor widget would for example use an I-beam cursor:
<pre>
<a href="#setCursor">setCursor</a>( <a href="qt.html#CursorShape-enum">IbeamCursor</a> );
</pre>
<p> If no cursor has been set, or after a call to <a href="#unsetCursor">unsetCursor</a>(), the
parent's cursor is used. The function unsetCursor() has no effect
on top-level widgets.
<p> <p>See also <a href="qapplication.html#setOverrideCursor">QApplication::setOverrideCursor</a>().
<p>Set this property's value with <a href="#setCursor">setCursor</a>(), get this property's value with <a href="#cursor">cursor</a>() and reset this property's value with <a href="#unsetCursor">unsetCursor</a>().
<h3 class=fn>bool <a name="customWhatsThis-prop"></a>customWhatsThis</h3> <p>This property holds whether the widget wants to handle What's This help manually.
<p>The default implementation of <a href="#customWhatsThis">customWhatsThis</a>() returns FALSE,
which means the widget will not receive any events in Whats This
mode.
<p> The widget may leave What's This mode by calling
<a href="qwhatsthis.html#leaveWhatsThisMode">QWhatsThis::leaveWhatsThisMode</a>(), with or without actually
displaying any help text.
<p> You can also reimplement customWhatsThis() if your widget is a
"passive interactor" supposed to work under all circumstances.
Simply don't call QWhatsThis::leaveWhatsThisMode() in that case.
<p> <p>See also <a href="qwhatsthis.html#inWhatsThisMode">QWhatsThis::inWhatsThisMode</a>() and <a href="qwhatsthis.html#leaveWhatsThisMode">QWhatsThis::leaveWhatsThisMode</a>().
<p>Get this property's value with <a href="#customWhatsThis">customWhatsThis</a>().
<h3 class=fn>bool <a name="enabled-prop"></a>enabled</h3> <p>This property holds whether the widget is enabled.
<p>An enabled widget receives keyboard and mouse events; a disabled
widget does not. In fact, an enabled widget only receives keyboard
events when it is in focus.
<p> Some widgets display themselves differently when they are disabled.
For example a button might draw its label grayed out. If your widget
needs to know when it becomes enabled or disabled, you can
reimplement the <a href="#enabledChange">enabledChange</a>() function.
<p> Disabling a widget implicitly disables all its children. Enabling
respectively enables all child widgets unless they have been
explicitly disabled.
<p> <p>See also <a href="#enabled-prop">enabled</a>, <a href="#isEnabledTo">isEnabledTo</a>(), <a href="qkeyevent.html">QKeyEvent</a>, <a href="qmouseevent.html">QMouseEvent</a> and <a href="#enabledChange">enabledChange</a>().
<p>Set this property's value with <a href="#setEnabled">setEnabled</a>() and get this property's value with <a href="#isEnabled">isEnabled</a>().
<h3 class=fn>bool <a name="focus-prop"></a>focus</h3> <p>This property holds whether this widget (or its focus proxy) has the keyboard input focus.
<p>Effectively equivalent to <tt>qApp->focusWidget() == this</tt>.
<p> <p>See also <a href="#setFocus">setFocus</a>(), <a href="#clearFocus">clearFocus</a>(), <a href="#focusPolicy-prop">focusPolicy</a> and <a href="qapplication.html#focusWidget">QApplication::focusWidget</a>().
<p>Get this property's value with <a href="#hasFocus">hasFocus</a>().
<h3 class=fn>bool <a name="focusEnabled-prop"></a>focusEnabled</h3> <p>This property holds whether the widget accepts keyboard focus.
<p>Keyboard focus is initially disabled (i.e. <a href="#focusPolicy">focusPolicy</a>() ==
QWidget::NoFocus).
<p> You must enable keyboard focus for a widget if it processes keyboard
events. This is normally done from the widget's constructor. For
instance, the <a href="qlineedit.html">QLineEdit</a> constructor calls
<a href="#setFocusPolicy">setFocusPolicy</a>(QWidget::StrongFocus).
<p> <p>See also <a href="#focusPolicy-prop">focusPolicy</a>, <a href="#focusInEvent">focusInEvent</a>(), <a href="#focusOutEvent">focusOutEvent</a>(), <a href="#keyPressEvent">keyPressEvent</a>(), <a href="#keyReleaseEvent">keyReleaseEvent</a>() and <a href="#enabled-prop">enabled</a>.
<p>Get this property's value with <a href="#isFocusEnabled">isFocusEnabled</a>().
<h3 class=fn><a href="qwidget.html#FocusPolicy-enum">FocusPolicy</a> <a name="focusPolicy-prop"></a>focusPolicy</h3> <p>This property holds the way the widget accepts keyboard focus.
<p>The policy is QWidget::TabFocus if the widget accepts keyboard
focus by tabbing, QWidget::ClickFocus if the widget accepts focus
by clicking, QWidget::StrongFocus if it accepts both and
QWidget::NoFocus if it does not accept focus at all (the default
for QWidget).
<p> You must enable keyboard focus for a widget if it processes
keyboard events. This is normally done from the widget's
constructor. For instance, the <a href="qlineedit.html">QLineEdit</a> constructor calls
<a href="#setFocusPolicy">setFocusPolicy</a>(QWidget::StrongFocus).
<p> <p>See also <a href="#focusEnabled-prop">focusEnabled</a>, <a href="#focusInEvent">focusInEvent</a>(), <a href="#focusOutEvent">focusOutEvent</a>(), <a href="#keyPressEvent">keyPressEvent</a>(), <a href="#keyReleaseEvent">keyReleaseEvent</a>() and <a href="#enabled-prop">enabled</a>.
<p>Set this property's value with <a href="#setFocusPolicy">setFocusPolicy</a>() and get this property's value with <a href="#focusPolicy">focusPolicy</a>().
<h3 class=fn><a href="qfont.html">QFont</a> <a name="font-prop"></a>font</h3> <p>This property holds the font currently set for the widget.
<p>The <a href="#fontInfo">fontInfo</a>() function reports the actual font that is being used by the
widget.
<p> As long as no special font has been set, or after <a href="#unsetFont">unsetFont</a>() is
called, this is either a special font for the widget class, the
parent's font or (if this widget is a top level widget) the default
application font.
<p> This code fragment sets a 12 point helvetica bold font:
<pre>
<a href="qfont.html">QFont</a> f( "Helvetica", 12, QFont::Bold );
<a href="#setFont">setFont</a>( f );
</pre>
<p> Apart from setting the font, <a href="#setFont">setFont</a>() informs all children about
the change.
<p> <p>See also <a href="#fontChange">fontChange</a>(), <a href="#fontInfo">fontInfo</a>(), <a href="#fontMetrics">fontMetrics</a>() and <a href="#ownFont-prop">ownFont</a>.
<p>Set this property's value with <a href="#setFont">setFont</a>(), get this property's value with <a href="#font">font</a>() and reset this property's value with <a href="#unsetFont">unsetFont</a>().
<h3 class=fn><a href="qrect.html">QRect</a> <a name="frameGeometry-prop"></a>frameGeometry</h3> <p>This property holds geometry of the widget relative to its parent including any window frame.
<p>See the <a href="geometry.html">Window Geometry documentation</a>
for an overview of geometry issues with top-level widgets.
<p> <p>See also <a href="#geometry-prop">geometry</a>, <a href="#x-prop">x</a>, <a href="#y-prop">y</a> and <a href="#pos-prop">pos</a>.
<p>Get this property's value with <a href="#frameGeometry">frameGeometry</a>().
<h3 class=fn><a href="qsize.html">QSize</a> <a name="frameSize-prop"></a>frameSize</h3> <p>This property holds the size of the widget including any window frame.
<p>
<p>Get this property's value with <a href="#frameSize">frameSize</a>().
<h3 class=fn><a href="qrect.html">QRect</a> <a name="geometry-prop"></a>geometry</h3> <p>This property holds the geometry of the widget relative to its parent and excluding the window frame.
<p>When changing the geometry, the widget, if visible, receives a move
event (<a href="#moveEvent">moveEvent</a>()) and/or a resize event (<a href="#resizeEvent">resizeEvent</a>())
immediately. If the widget is not currently visible, it is
guaranteed to receive appropriate events before it is shown.
<p> The size component is adjusted if it lies outside the range defined
by <a href="#minimumSize">minimumSize</a>() and <a href="#maximumSize">maximumSize</a>().
<p> <a href="#setGeometry">setGeometry</a>() is virtual, and all other overloaded setGeometry()
implementations in Qt call it.
<p> <b>Warning:</b> If you call setGeometry() from resizeEvent() or
moveEvent(), you may experience infinite recursion.
<p> See the <a href="geometry.html">Window Geometry documentation</a>
for an overview of geometry issues with top-level widgets.
<p> <p>See also <a href="#frameGeometry-prop">frameGeometry</a>, <a href="#rect-prop">rect</a>, <a href="#pos-prop">pos</a>, <a href="#size-prop">size</a>, <a href="#moveEvent">moveEvent</a>(), <a href="#resizeEvent">resizeEvent</a>(), <a href="#minimumSize-prop">minimumSize</a> and <a href="#maximumSize-prop">maximumSize</a>.
<p>Set this property's value with <a href="#setGeometry">setGeometry</a>() and get this property's value with <a href="#geometry">geometry</a>().
<h3 class=fn>int <a name="height-prop"></a>height</h3> <p>This property holds the height of the widget excluding any window frame.
<p>See the <a href="geometry.html">Window Geometry documentation</a>
for an overview of geometry issues with top-level widgets.
<p> <p>See also <a href="#geometry-prop">geometry</a>, <a href="#width-prop">width</a> and <a href="#size-prop">size</a>.
<p>Get this property's value with <a href="#height">height</a>().
<h3 class=fn>bool <a name="hidden-prop"></a>hidden</h3> <p>This property holds whether the widget is explicitly hidden.
<p>If FALSE, the widget is visible or would become visible if all its
ancestors became visible.
<p> <p>See also <a href="#hide">hide</a>(), <a href="#show">show</a>(), <a href="#visible-prop">visible</a> and <a href="#isVisibleTo">isVisibleTo</a>().
<p>Get this property's value with <a href="#isHidden">isHidden</a>().
<h3 class=fn><a href="qpixmap.html">QPixmap</a> <a name="icon-prop"></a>icon</h3> <p>This property holds the widget icon pixmap.
<p>This property makes sense only for top-level widgets. If no icon
has been set, <a href="#icon">icon</a>() returns 0.
<p> <p>See also <a href="#iconText-prop">iconText</a>, <a href="#caption-prop">caption</a> and <a href="appicon.html">Setting the Application Icon</a>.
<p>Set this property's value with <a href="#setIcon">setIcon</a>() and get this property's value with <a href="#icon">icon</a>().
<h3 class=fn><a href="qstring.html">QString</a> <a name="iconText-prop"></a>iconText</h3> <p>This property holds the widget icon text.
<p>This property makes sense only for top-level widgets. If no icon
text has been set, this functions returns QString::null.
<p> <p>See also <a href="#icon-prop">icon</a> and <a href="#caption-prop">caption</a>.
<p>Set this property's value with <a href="#setIconText">setIconText</a>() and get this property's value with <a href="#iconText">iconText</a>().
<h3 class=fn>bool <a name="isActiveWindow-prop"></a>isActiveWindow</h3> <p>This property holds whether this widget is the active window or a child of it.
<p>The active window is the window that has keyboard focus.
<p> When popup windows are visible, this property is TRUE for both the
active window <em>and</em> for the popup.
<p> <p>See also <a href="#setActiveWindow">setActiveWindow</a>() and <a href="qapplication.html#activeWindow">QApplication::activeWindow</a>().
<p>Get this property's value with <a href="#isActiveWindow">isActiveWindow</a>().
<h3 class=fn>bool <a name="isDesktop-prop"></a>isDesktop</h3> <p>This property holds whether the widget is a desktop widget.
<p>A desktop widget is also a top-level widget.
<p> <p>See also <a href="#isTopLevel-prop">isTopLevel</a> and <a href="qapplication.html#desktop">QApplication::desktop</a>().
<p>Get this property's value with <a href="#isDesktop">isDesktop</a>().
<h3 class=fn>bool <a name="isDialog-prop"></a>isDialog</h3> <p>This property holds whether the widget is a dialog widget.
<p>A dialog widget is a secondary top-level widget.
<p> <p>See also <a href="#isTopLevel-prop">isTopLevel</a> and <a href="qdialog.html">QDialog</a>.
<p>Get this property's value with <a href="#isDialog">isDialog</a>().
<h3 class=fn>bool <a name="isModal-prop"></a>isModal</h3> <p>This property holds whether the widget is a modal widget.
<p>This property only makes sense for top-level widgets. A modal
widget prevents widgets in all other top-level widgets from getting
any input.
<p> <p>See also <a href="#isTopLevel-prop">isTopLevel</a>, <a href="#isDialog-prop">isDialog</a> and <a href="qdialog.html">QDialog</a>.
<p>Get this property's value with <a href="#isModal">isModal</a>().
<h3 class=fn>bool <a name="isPopup-prop"></a>isPopup</h3> <p>This property holds whether the widget is a popup widget.
<p>A popup widget is created by specifying the widget flag <a href="qt.html#WidgetFlags-enum">WType_Popup</a> to the widget constructor. A popup widget is also a
top-level widget.
<p> <p>See also <a href="#isTopLevel-prop">isTopLevel</a>.
<p>Get this property's value with <a href="#isPopup">isPopup</a>().
<h3 class=fn>bool <a name="isTopLevel-prop"></a>isTopLevel</h3> <p>This property holds whether the widget is a top-level widget.
<p>A top-level widget is a widget which usually has a frame and a <a href="#caption-prop">caption (title)</a>. <a href="#isPopup">Popup</a> and <a href="#isDesktop">desktop</a> widgets
are also top-level widgets.
<p> A top-level widget can have a <a href="#parentWidget">parent
widget</a>. It will then be grouped with its parent: deleted
when the parent is deleted, minimized when the parent is minimized
etc. If supported by the window manager, it will also have a common
taskbar entry with its parent.
<p> <a href="qdialog.html">QDialog</a> and <a href="qmainwindow.html">QMainWindow</a> widgets are by default top-level, even if a
parent widget is specified in the constructor. This behavior is
specified by the <a href="qt.html#WidgetFlags-enum">WType_TopLevel</a> widget flag.
<p> Child widgets are the opposite of top-level widgets.
<p> <p>See also <a href="#topLevelWidget">topLevelWidget</a>(), <a href="#isDialog-prop">isDialog</a>, <a href="#isModal-prop">isModal</a>, <a href="#isPopup-prop">isPopup</a>, <a href="#isDesktop-prop">isDesktop</a> and <a href="#parentWidget">parentWidget</a>().
<p>Get this property's value with <a href="#isTopLevel">isTopLevel</a>().
<h3 class=fn>int <a name="maximumHeight-prop"></a>maximumHeight</h3> <p>This property holds the widget's maximum height.
<p>This property corresponds to <a href="#maximumSize">maximumSize</a>().<a href="#height">height</a>().
<p> <p>See also <a href="#maximumSize-prop">maximumSize</a> and <a href="#maximumWidth-prop">maximumWidth</a>.
<p>Set this property's value with <a href="#setMaximumHeight">setMaximumHeight</a>() and get this property's value with <a href="#maximumHeight">maximumHeight</a>().
<h3 class=fn><a href="qsize.html">QSize</a> <a name="maximumSize-prop"></a>maximumSize</h3> <p>This property holds the widget's maximum size.
<p>The widget cannot be resized to a larger size than the maximum widget
size.
<p> <p>See also <a href="#maximumWidth-prop">maximumWidth</a>, <a href="#maximumHeight-prop">maximumHeight</a>, <a href="#maximumSize-prop">maximumSize</a>, <a href="#minimumSize-prop">minimumSize</a> and <a href="#sizeIncrement-prop">sizeIncrement</a>.
<p>Set this property's value with <a href="#setMaximumSize">setMaximumSize</a>() and get this property's value with <a href="#maximumSize">maximumSize</a>().
<h3 class=fn>int <a name="maximumWidth-prop"></a>maximumWidth</h3> <p>This property holds the widget's maximum width.
<p>This property corresponds to <a href="#maximumSize">maximumSize</a>().<a href="#width">width</a>().
<p> <p>See also <a href="#maximumSize-prop">maximumSize</a> and <a href="#maximumHeight-prop">maximumHeight</a>.
<p>Set this property's value with <a href="#setMaximumWidth">setMaximumWidth</a>() and get this property's value with <a href="#maximumWidth">maximumWidth</a>().
<h3 class=fn><a href="qrect.html">QRect</a> <a name="microFocusHint-prop"></a>microFocusHint</h3> <p>This property holds the currently set micro focus hint for this widget.
<p>See the documentation of <a href="#setMicroFocusHint">setMicroFocusHint</a>() for more information.
<p>Get this property's value with <a href="#microFocusHint">microFocusHint</a>().
<h3 class=fn>bool <a name="minimized-prop"></a>minimized</h3> <p>This property holds whether this widget is minimized (iconified).
<p>This property is relevant only for top-level widgets.
<p> <p>See also <a href="#showMinimized">showMinimized</a>(), <a href="#visible-prop">visible</a>, <a href="#show">show</a>(), <a href="#hide">hide</a>() and <a href="#showNormal">showNormal</a>().
<p>Get this property's value with <a href="#isMinimized">isMinimized</a>().
<h3 class=fn>int <a name="minimumHeight-prop"></a>minimumHeight</h3> <p>This property holds the widget's minimum height.
<p>This property corresponds to <a href="#minimumSize">minimumSize</a>().<a href="#height">height</a>().
<p> <p>See also <a href="#minimumSize-prop">minimumSize</a> and <a href="#minimumWidth-prop">minimumWidth</a>.
<p>Set this property's value with <a href="#setMinimumHeight">setMinimumHeight</a>() and get this property's value with <a href="#minimumHeight">minimumHeight</a>().
<h3 class=fn><a href="qsize.html">QSize</a> <a name="minimumSize-prop"></a>minimumSize</h3> <p>This property holds the widget's minimum size.
<p>The widget cannot be resized to a smaller size than the minimum widget
size. The widget's size is forced to the minimum size if the current
size is smaller.
<p> If you use a layout inside the widget, the minimum size will be set
by the layout and not by <a href="#setMinimumSize">setMinimumSize</a>(), unless you set the
layout's resize mode to QLayout::FreeResize.
<p> <p>See also <a href="#minimumWidth-prop">minimumWidth</a>, <a href="#minimumHeight-prop">minimumHeight</a>, <a href="#maximumSize-prop">maximumSize</a>, <a href="#sizeIncrement-prop">sizeIncrement</a> and <a href="qlayout.html#resizeMode-prop">QLayout::resizeMode</a>.
<p>Set this property's value with <a href="#setMinimumSize">setMinimumSize</a>() and get this property's value with <a href="#minimumSize">minimumSize</a>().
<h3 class=fn><a href="qsize.html">QSize</a> <a name="minimumSizeHint-prop"></a>minimumSizeHint</h3> <p>This property holds the recommended minimum size for the widget.
<p>If the value of this property is an invalid size, no minimum size
is recommended.
<p> The default implementation of <a href="#minimumSizeHint">minimumSizeHint</a>() returns an invalid
size if there is no layout for this widget, and returns the layout's
minimum size otherwise. Most built-in widgets reimplement
minimumSizeHint().
<p> <a href="qlayout.html">QLayout</a> will never resize a widget to a size smaller than
minimumSizeHint.
<p> <p>See also <a href="qsize.html#isValid">QSize::isValid</a>(), <a href="#size-prop">size</a>, <a href="#minimumSize-prop">minimumSize</a> and <a href="#sizePolicy-prop">sizePolicy</a>.
<p>Get this property's value with <a href="#minimumSizeHint">minimumSizeHint</a>().
<h3 class=fn>int <a name="minimumWidth-prop"></a>minimumWidth</h3> <p>This property holds the widget's minimum width.
<p>This property corresponds to <a href="#minimumSize">minimumSize</a>().<a href="#width">width</a>().
<p> <p>See also <a href="#minimumSize-prop">minimumSize</a> and <a href="#minimumHeight-prop">minimumHeight</a>.
<p>Set this property's value with <a href="#setMinimumWidth">setMinimumWidth</a>() and get this property's value with <a href="#minimumWidth">minimumWidth</a>().
<h3 class=fn>bool <a name="mouseTracking-prop"></a>mouseTracking</h3> <p>This property holds whether mouse tracking is enabled for this widget.
<p>If mouse tracking is disabled (the default), this widget only
receives mouse move events when at least one mouse button is
pressed down while the mouse is being moved.
<p> If mouse tracking is enabled, this widget receives mouse move
events even if no buttons are pressed down.
<p> <p>See also <a href="#mouseMoveEvent">mouseMoveEvent</a>() and <a href="qapplication.html#setGlobalMouseTracking">QApplication::setGlobalMouseTracking</a>().
<p>Set this property's value with <a href="#setMouseTracking">setMouseTracking</a>() and get this property's value with <a href="#hasMouseTracking">hasMouseTracking</a>().
<h3 class=fn>bool <a name="ownCursor-prop"></a>ownCursor</h3> <p>This property holds whether the widget uses its own cursor.
<p>If FALSE, the widget uses its parent widget's cursor.
<p> <p>See also <a href="#cursor-prop">cursor</a>.
<p>Get this property's value with <a href="#ownCursor">ownCursor</a>().
<h3 class=fn>bool <a name="ownFont-prop"></a>ownFont</h3> <p>This property holds whether the widget uses its own font.
<p>If FALSE, the widget uses its parent widget's font.
<p> <p>See also <a href="#font-prop">font</a>.
<p>Get this property's value with <a href="#ownFont">ownFont</a>().
<h3 class=fn>bool <a name="ownPalette-prop"></a>ownPalette</h3> <p>This property holds whether the widget uses its own palette.
<p>If FALSE, the widget uses its parent widget's palette.
<p> <p>See also <a href="#palette-prop">palette</a>.
<p>Get this property's value with <a href="#ownPalette">ownPalette</a>().
<h3 class=fn><a href="qpalette.html">QPalette</a> <a name="palette-prop"></a>palette</h3> <p>This property holds the widget's palette.
<p>As long as no special palette has been set, or after <a href="#unsetPalette">unsetPalette</a>()
has been called, this is either a special palette for the widget
class, the parent's palette or (if this widget is a top level
widget) the default application palette.
<p> Instead of defining an entirely new palette, you can also use the
<a href="#paletteBackgroundColor-prop">paletteBackgroundColor</a>,
<a href="#paletteBackgroundPixmap-prop">paletteBackgroundPixmap</a> and
<a href="#paletteForegroundColor-prop">paletteForegroundColor</a>
convenience properties to change a widget's
background and foreground appearance only.
<p> <p>See also <a href="#ownPalette-prop">ownPalette</a>, <a href="#colorGroup-prop">colorGroup</a> and <a href="qapplication.html#palette">QApplication::palette</a>().
<p>Set this property's value with <a href="#setPalette">setPalette</a>(), get this property's value with <a href="#palette">palette</a>() and reset this property's value with <a href="#unsetPalette">unsetPalette</a>().
<h3 class=fn><a href="qcolor.html">QColor</a> <a name="paletteBackgroundColor-prop"></a>paletteBackgroundColor</h3> <p>This property holds the background color of the widget.
<p>The palette background color is usually set implicitly by
<a href="#setBackgroundMode">setBackgroundMode</a>(), although it can also be set explicitly by
<a href="#setPaletteBackgroundColor">setPaletteBackgroundColor</a>(). setPaletteBackgroundColor() is a
convenience function that creates and sets a modified <a href="qpalette.html">QPalette</a> with
<a href="#setPalette">setPalette</a>(). The palette is modified according to the widget's
background mode. For example, if the background mode is
PaletteButton the color used for the palette's QColorGroup::Button
color entry is set.
<p> If there is a background pixmap (set using
<a href="#setPaletteBackgroundPixmap">setPaletteBackgroundPixmap</a>()), then the return value of this
function is indeterminate.
<p> <p>See also <a href="#paletteBackgroundPixmap-prop">paletteBackgroundPixmap</a>, <a href="#paletteForegroundColor-prop">paletteForegroundColor</a>, <a href="#palette-prop">palette</a> and <a href="#colorGroup-prop">colorGroup</a>.
<p>Set this property's value with <a href="#setPaletteBackgroundColor">setPaletteBackgroundColor</a>(), get this property's value with <a href="#paletteBackgroundColor">paletteBackgroundColor</a>() and reset this property's value with <a href="#unsetPalette">unsetPalette</a>().
<h3 class=fn><a href="qpixmap.html">QPixmap</a> <a name="paletteBackgroundPixmap-prop"></a>paletteBackgroundPixmap</h3> <p>This property holds the background pixmap of the widget.
<p>The palette background pixmap is usually set implicitly by
<a href="#setBackgroundMode">setBackgroundMode</a>(), although it can also be set explicitly by
<a href="#setPaletteBackgroundPixmap">setPaletteBackgroundPixmap</a>(). setPaletteBackgroundPixmap() is a
convenience function that creates and sets a modified <a href="qpalette.html">QPalette</a> with
<a href="#setPalette">setPalette</a>(). The palette is modified according to the widget's
background mode. For example, if the background mode is
PaletteButton the pixmap used for the palette's QColorGroup::Button
color entry is set.
<p> If there is a plain background color (set using
<a href="#setPaletteBackgroundColor">setPaletteBackgroundColor</a>()), then this function returns 0.
<p> <p>See also <a href="#paletteBackgroundColor-prop">paletteBackgroundColor</a>, <a href="#paletteForegroundColor-prop">paletteForegroundColor</a>, <a href="#palette-prop">palette</a> and <a href="#colorGroup-prop">colorGroup</a>.
<p>Set this property's value with <a href="#setPaletteBackgroundPixmap">setPaletteBackgroundPixmap</a>(), get this property's value with <a href="#paletteBackgroundPixmap">paletteBackgroundPixmap</a>() and reset this property's value with <a href="#unsetPalette">unsetPalette</a>().
<h3 class=fn><a href="qcolor.html">QColor</a> <a name="paletteForegroundColor-prop"></a>paletteForegroundColor</h3> <p>This property holds the foreground color of the widget.
<p>setPaletteForegroundColor() is a convenience function that creates and
sets a modified <a href="qpalette.html">QPalette</a> with <a href="#setPalette">setPalette</a>(). The palette is modified
according to the widget's <em>background mode</em>. For example, if the
background mode is PaletteButton the palette entry
QColorGroup::ButtonText is set to color.
<p> <p>See also <a href="#palette-prop">palette</a>, <a href="qapplication.html#setPalette">QApplication::setPalette</a>(), <a href="#backgroundMode-prop">backgroundMode</a>, <a href="#foregroundColor">foregroundColor</a>(), <a href="#backgroundMode-prop">backgroundMode</a> and <a href="#setEraseColor">setEraseColor</a>().
<p>Set this property's value with <a href="#setPaletteForegroundColor">setPaletteForegroundColor</a>(), get this property's value with <a href="#paletteForegroundColor">paletteForegroundColor</a>() and reset this property's value with <a href="#unsetPalette">unsetPalette</a>().
<h3 class=fn><a href="qpoint.html">QPoint</a> <a name="pos-prop"></a>pos</h3> <p>This property holds the position of the widget in its parent widget.
<p>If the widget is a top-level widget, the position is that of the
widget on the desktop, including the frame.
<p> When changing the position, the widget, if visible, receives a move
event (<a href="#moveEvent">moveEvent</a>()) immediately. If the widget is not currently
visible, it is guaranteed to receive an event before it is shown.
<p> <a href="#move">move</a>() is virtual, and all other overloaded move() implementations
in Qt call it.
<p> <b>Warning:</b> If you call move() or <a href="#setGeometry">setGeometry</a>() from moveEvent(), you
may experience infinite recursion.
<p> See the <a href="geometry.html">Window Geometry documentation</a>
for an overview of geometry issues with top-level widgets.
<p> <p>See also <a href="#frameGeometry-prop">frameGeometry</a>, <a href="#size-prop">size</a>, <a href="#x-prop">x</a> and <a href="#y-prop">y</a>.
<p>Set this property's value with <a href="#move">move</a>() and get this property's value with <a href="#pos">pos</a>().
<h3 class=fn><a href="qrect.html">QRect</a> <a name="rect-prop"></a>rect</h3> <p>This property holds the internal geometry of the widget excluding any window frame.
<p>The rect property equals <a href="qrect.html">QRect</a>(0, 0, <a href="#width">width</a>(), <a href="#height">height</a>()).
<p> See the <a href="geometry.html">Window Geometry documentation</a>
for an overview of geometry issues with top-level widgets.
<p> <p>See also <a href="#size-prop">size</a>.
<p>Get this property's value with <a href="#rect">rect</a>().
<h3 class=fn><a href="qsize.html">QSize</a> <a name="size-prop"></a>size</h3> <p>This property holds the size of the widget excluding any window frame.
<p>When resizing, the widget, if visible, receives a resize event
(<a href="#resizeEvent">resizeEvent</a>()) immediately. If the widget is not currently visible,
it is guaranteed to receive an event before it is shown.
<p> The size is adjusted if it lies outside the range defined by
<a href="#minimumSize">minimumSize</a>() and <a href="#maximumSize">maximumSize</a>(). Furthermore, the size is always at
least <a href="qsize.html">QSize</a>(1, 1).
<p> <a href="#resize">resize</a>() is virtual, and all other overloaded resize()
implementations in Qt call it.
<p> <b>Warning:</b> If you call resize() or <a href="#setGeometry">setGeometry</a>() from resizeEvent(),
you may experience infinite recursion.
<p> <p>See also <a href="#pos-prop">pos</a>, <a href="#geometry-prop">geometry</a>, <a href="#minimumSize-prop">minimumSize</a>, <a href="#maximumSize-prop">maximumSize</a> and <a href="#resizeEvent">resizeEvent</a>().
<p>Set this property's value with <a href="#resize">resize</a>() and get this property's value with <a href="#size">size</a>().
<h3 class=fn><a href="qsize.html">QSize</a> <a name="sizeHint-prop"></a>sizeHint</h3> <p>This property holds the recommended size for the widget.
<p>If the value of this property is an invalid size, no size is
recommended.
<p> The default implementation of <a href="#sizeHint">sizeHint</a>() returns an invalid size if
there is no layout for this widget, and returns the layout's
preferred size otherwise.
<p> <p>See also <a href="qsize.html#isValid">QSize::isValid</a>(), <a href="#minimumSizeHint-prop">minimumSizeHint</a>, <a href="#sizePolicy-prop">sizePolicy</a>, <a href="#minimumSize-prop">minimumSize</a> and <a href="#updateGeometry">updateGeometry</a>().
<p>Get this property's value with <a href="#sizeHint">sizeHint</a>().
<h3 class=fn><a href="qsize.html">QSize</a> <a name="sizeIncrement-prop"></a>sizeIncrement</h3> <p>This property holds the size increment of the widget.
<p>When the user resizes the window, the size will move in steps of
<a href="#sizeIncrement">sizeIncrement</a>().<a href="#width">width</a>() pixels horizontally and
sizeIncrement.<a href="#height">height</a>() pixels vertically, with <a href="#baseSize">baseSize</a>() as basis.
Preferred widget sizes are for nonnegative integers <em>i</em>
and <em>j</em>:
<pre>
<a href="#width-prop">width</a> = <a href="#baseSize">baseSize</a>().width() + i * sizeIncrement().width();
<a href="#height-prop">height</a> = <a href="#baseSize">baseSize</a>().height() + j * sizeIncrement().height();
</pre>
<p> Note that while you can set the size increment for all widgets, it
only effects top-level widgets.
<p> <b>Warning:</b> The size increment has no effect under Windows, and may be
disregarded by the window manager on X.
<p> <p>See also <a href="#size-prop">size</a>, <a href="#minimumSize-prop">minimumSize</a> and <a href="#maximumSize-prop">maximumSize</a>.
<p>Set this property's value with <a href="#setSizeIncrement">setSizeIncrement</a>() and get this property's value with <a href="#sizeIncrement">sizeIncrement</a>().
<h3 class=fn><a href="qsizepolicy.html">QSizePolicy</a> <a name="sizePolicy-prop"></a>sizePolicy</h3> <p>This property holds the default layout behavior of the widget.
<p>If there is a <a href="qlayout.html">QLayout</a> that manages this widget's children, the size
policy specified by that layout is used. If there is no such
QLayout, the result of this function is used.
<p> The default policy is Preferred/Preferred, which means that the
widget can be freely resized, but prefers to be the size <a href="#sizeHint">sizeHint</a>()
returns. Button-like widgets set the size policy to specify that
they may stretch horizontally, but are fixed vertically. The same
applies to lineedit controls (such as <a href="qlineedit.html">QLineEdit</a>, <a href="qspinbox.html">QSpinBox</a> or an
editable <a href="qcombobox.html">QComboBox</a>) and other horizontally orientated widgets (such
as <a href="qprogressbar.html">QProgressBar</a>). <a href="qtoolbutton.html">QToolButton</a>'s are normally square, so they allow
growth in both directions. Widgets that support different directions
(such as <a href="qslider.html">QSlider</a>, <a href="qscrollbar.html">QScrollBar</a> or <a href="qheader.html">QHeader</a>) specify stretching in the
respective direction only. Widgets that can provide scrollbars
(usually subclasses of <a href="qscrollview.html">QScrollView</a>) tend to specify that they can
use additional space, and that they can survive on less than
sizeHint().
<p> <p>See also <a href="#sizeHint-prop">sizeHint</a>, <a href="qlayout.html">QLayout</a>, <a href="qsizepolicy.html">QSizePolicy</a> and <a href="#updateGeometry">updateGeometry</a>().
<p>Set this property's value with <a href="#setSizePolicy">setSizePolicy</a>() and get this property's value with <a href="#sizePolicy">sizePolicy</a>().
<h3 class=fn>bool <a name="underMouse-prop"></a>underMouse</h3> <p>This property holds whether the widget is under the mouse cursor.
<p>This value is not updated properly during drag'n'drop operations.
<p> <p>See also <a href="qevent.html#Type-enum">QEvent::Enter</a> and <a href="qevent.html#Type-enum">QEvent::Leave</a>.
<p>Get this property's value with <a href="#hasMouse">hasMouse</a>().
<h3 class=fn>bool <a name="updatesEnabled-prop"></a>updatesEnabled</h3> <p>This property holds whether updates are enabled.
<p>Calling <a href="#update">update</a>() and <a href="#repaint">repaint</a>() has no effect if updates are disabled.
Paint events from the window system are processed normally even if
updates are disabled.
<p> <a href="#setUpdatesEnabled">setUpdatesEnabled</a>() is normally used to disable updates for a short
period of time, for instance to avoid screen flicker during large
changes.
<p> Example:
<pre>
<a href="#setUpdatesEnabled">setUpdatesEnabled</a>( FALSE );
bigVisualChanges();
<a href="#setUpdatesEnabled">setUpdatesEnabled</a>( TRUE );
<a href="#repaint">repaint</a>();
</pre>
<p> <p>See also <a href="#update">update</a>(), <a href="#repaint">repaint</a>() and <a href="#paintEvent">paintEvent</a>().
<p>Set this property's value with <a href="#setUpdatesEnabled">setUpdatesEnabled</a>() and get this property's value with <a href="#isUpdatesEnabled">isUpdatesEnabled</a>().
<h3 class=fn>bool <a name="visible-prop"></a>visible</h3> <p>This property holds whether the widget is visible.
<p>Calling <a href="#show">show</a>() sets the widget to visible status if all its parent
widgets up to the top-level widget are visible. If an ancestor is
not visible, the widget won't become visible until all its
ancestors are shown.
<p> Calling <a href="#hide">hide</a>() hides a widget explicitly. An explicitly hidden
widget will never become visible, even if all its ancestors become
visible, unless you show it.
<p> Iconified top-level widgets also have hidden status, as well as
having <a href="#isMinimized">isMinimized</a>() return TRUE. Windows that exist on another
virtual desktop (on platforms that support this concept) also have
hidden status.
<p> A widget that happens to be obscured by other windows on the screen
is considered to be visible.
<p> A widget receives show and hide events when its visibility status
changes. Between a hide and a show event, there is no need in
wasting any CPU on preparing or displaying information to the
user. A video application, for example, might simply stop generating
new frames.
<p> <p>See also <a href="#show">show</a>(), <a href="#hide">hide</a>(), <a href="#hidden-prop">hidden</a>, <a href="#isVisibleTo">isVisibleTo</a>(), <a href="#minimized-prop">minimized</a>, <a href="#showEvent">showEvent</a>() and <a href="#hideEvent">hideEvent</a>().
<p>Get this property's value with <a href="#isVisible">isVisible</a>().
<h3 class=fn><a href="qrect.html">QRect</a> <a name="visibleRect-prop"></a>visibleRect</h3> <p>This property holds the currently visible rectangle of the widget.
<p>This property is useful to optimize immediate repainting of a
widget. Typical usage is:
<pre>
<a href="#repaint">repaint</a>( w->visibleRect() );
</pre>
or
<pre>
<a href="#repaint">repaint</a>( w->visibleRect(), FALSE );
</pre>
<p> If nothing is visible, the rectangle returned is empty.
<p>Get this property's value with <a href="#visibleRect">visibleRect</a>().
<h3 class=fn>int <a name="width-prop"></a>width</h3> <p>This property holds the width of the widget excluding any window frame.
<p>See the <a href="geometry.html">Window Geometry documentation</a>
for an overview of geometry issues with top-level widgets.
<p> <p>See also <a href="#geometry-prop">geometry</a>, <a href="#height-prop">height</a> and <a href="#size-prop">size</a>.
<p>Get this property's value with <a href="#width">width</a>().
<h3 class=fn>int <a name="x-prop"></a>x</h3> <p>This property holds the x coordinate of the widget relative to its parent including any window frame.
<p>See the <a href="geometry.html">Window Geometry documentation</a>
for an overview of geometry issues with top-level widgets.
<p> <p>See also <a href="#frameGeometry-prop">frameGeometry</a>, <a href="#y-prop">y</a> and <a href="#pos-prop">pos</a>.
<p>Get this property's value with <a href="#x">x</a>().
<h3 class=fn>int <a name="y-prop"></a>y</h3> <p>This property holds the y coordinate of the widget relative to its parent and including any window frame.
<p>See the <a href="geometry.html">Window Geometry documentation</a>
for an overview of geometry issues with top-level widgets.
<p> <p>See also <a href="#frameGeometry-prop">frameGeometry</a>, <a href="#x-prop">x</a> and <a href="#pos-prop">pos</a>.
<p>Get this property's value with <a href="#y">y</a>().
<!-- eof -->
<hr><p>
This file is part of the <a href="index.html">Qt toolkit</a>.
Copyright © 1995-2001
<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
<table width=100% cellspacing=0 border=0><tr>
<td>Copyright © 2001
<a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a>
<td align=right><div align=right>Qt version 3.0.2</div>
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