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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qtgui.html">QtGui</a></li> <li>QRubberBand</li> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-types">Public Types</a></li> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#protected-functions">Protected Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <h1 class="title">QRubberBand Class Reference</h1> <!-- $$$QRubberBand-brief --> <p>The QRubberBand class provides a rectangle or line that can indicate a selection or a boundary. <a href="#details">More...</a></p> <!-- @@@QRubberBand --> <pre class="cpp"> <span class="preprocessor">#include <QRubberBand></span></pre><p><b>Inherits: </b><a href="qwidget.html">QWidget</a>.</p> <ul> <li><a href="qrubberband-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-types"></a> <h2>Public Types</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#Shape-enum">Shape</a></b> { Line, Rectangle }</td></tr> </table> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#QRubberBand">QRubberBand</a></b> ( Shape <i>s</i>, QWidget * <i>p</i> = 0 )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#dtor.QRubberBand">~QRubberBand</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#move">move</a></b> ( int <i>x</i>, int <i>y</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#move-2">move</a></b> ( const QPoint & <i>p</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#resize">resize</a></b> ( int <i>width</i>, int <i>height</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#resize-2">resize</a></b> ( const QSize & <i>size</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#setGeometry">setGeometry</a></b> ( const QRect & <i>rect</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#setGeometry-2">setGeometry</a></b> ( int <i>x</i>, int <i>y</i>, int <i>width</i>, int <i>height</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> Shape </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#shape">shape</a></b> () const</td></tr> </table> <ul> <li class="fn">221 public functions inherited from <a href="qwidget.html#public-functions">QWidget</a></li> <li class="fn">29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li> <li class="fn">13 public functions inherited from <a href="qpaintdevice.html#public-functions">QPaintDevice</a></li> </ul> <a name="protected-functions"></a> <h2>Protected Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#initStyleOption">initStyleOption</a></b> ( QStyleOptionRubberBand * <i>option</i> ) const</td></tr> </table> <a name="reimplemented-protected-functions"></a> <h2>Reimplemented Protected Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#changeEvent">changeEvent</a></b> ( QEvent * <i>e</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#event">event</a></b> ( QEvent * <i>e</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#moveEvent">moveEvent</a></b> ( QMoveEvent * )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#paintEvent">paintEvent</a></b> ( QPaintEvent * )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#resizeEvent">resizeEvent</a></b> ( QResizeEvent * )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qrubberband.html#showEvent">showEvent</a></b> ( QShowEvent * <i>e</i> )</td></tr> </table> <ul> <li class="fn">37 protected functions inherited from <a href="qwidget.html#protected-functions">QWidget</a></li> <li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li> <li class="fn">1 protected function inherited from <a href="qpaintdevice.html#protected-functions">QPaintDevice</a></li> </ul> <h3>Additional Inherited Members</h3> <ul> <li class="fn">58 properties inherited from <a href="qwidget.html#properties">QWidget</a></li> <li class="fn">1 property inherited from <a href="qobject.html#properties">QObject</a></li> <li class="fn">19 public slots inherited from <a href="qwidget.html#public-slots">QWidget</a></li> <li class="fn">1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li> <li class="fn">1 signal inherited from <a href="qwidget.html#signals">QWidget</a></li> <li class="fn">1 signal inherited from <a href="qobject.html#signals">QObject</a></li> <li class="fn">4 static public members inherited from <a href="qwidget.html#static-public-members">QWidget</a></li> <li class="fn">7 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li> <li class="fn">1 protected slot inherited from <a href="qwidget.html#protected-slots">QWidget</a></li> </ul> <a name="details"></a> <!-- $$$QRubberBand-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The QRubberBand class provides a rectangle or line that can indicate a selection or a boundary.</p> <p>A rubber band is often used to show a new bounding area (as in a <a href="qsplitter.html">QSplitter</a> or a <a href="qdockwidget.html">QDockWidget</a> that is undocking). Historically this has been implemented using a <a href="qpainter.html">QPainter</a> and XOR, but this approach doesn't always work properly since rendering can happen in the window below the rubber band, but before the rubber band has been "erased".</p> <p>You can create a QRubberBand whenever you need to render a rubber band around a given area (or to represent a single line), then call <a href="qrubberband.html#setGeometry">setGeometry</a>(), <a href="qrubberband.html#move">move</a>() or <a href="qrubberband.html#resize">resize</a>() to position and size it. A common pattern is to do this in conjunction with mouse events. For example:</p> <pre class="cpp"> <span class="type">void</span> Widget<span class="operator">::</span><a href="qwidget.html#mousePressEvent">mousePressEvent</a>(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) { origin <span class="operator">=</span> event<span class="operator">-</span><span class="operator">></span>pos(); <span class="keyword">if</span> (<span class="operator">!</span>rubberBand) rubberBand <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QRubberBand</span>(<span class="type">QRubberBand</span><span class="operator">::</span>Rectangle<span class="operator">,</span> <span class="keyword">this</span>); rubberBand<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>(origin<span class="operator">,</span> <span class="type"><a href="qsize.html">QSize</a></span>())); rubberBand<span class="operator">-</span><span class="operator">></span>show(); } <span class="type">void</span> Widget<span class="operator">::</span><a href="qwidget.html#mouseMoveEvent">mouseMoveEvent</a>(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) { rubberBand<span class="operator">-</span><span class="operator">></span>setGeometry(<span class="type"><a href="qrect.html">QRect</a></span>(origin<span class="operator">,</span> event<span class="operator">-</span><span class="operator">></span>pos())<span class="operator">.</span>normalized()); } <span class="type">void</span> Widget<span class="operator">::</span><a href="qwidget.html#mouseReleaseEvent">mouseReleaseEvent</a>(<span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> <span class="operator">*</span>event) { rubberBand<span class="operator">-</span><span class="operator">></span>hide(); <span class="comment">// determine selection, for example using QRect::intersects()</span> <span class="comment">// and QRect::contains().</span> }</pre> <p>If you pass a parent to QRubberBand's constructor, the rubber band will display only inside its parent, but stays on top of other child widgets. If no parent is passed, QRubberBand will act as a top-level widget.</p> <p>Call <a href="qwidget.html#show">show</a>() to make the rubber band visible; also when the rubber band is not a top-level. Hiding or destroying the widget will make the rubber band disappear. The rubber band can be a <a href="qrubberband.html#Shape-enum">Rectangle</a> or a <a href="qrubberband.html#Shape-enum">Line</a> (vertical or horizontal), depending on the <a href="qrubberband.html#shape">shape</a>() it was given when constructed.</p> </div> <!-- @@@QRubberBand --> <div class="types"> <h2>Member Type Documentation</h2> <!-- $$$Shape$$$Line$$$Rectangle --> <h3 class="fn"><a name="Shape-enum"></a>enum QRubberBand::<span class="name">Shape</span></h3> <p>This enum specifies what shape a <a href="qrubberband.html">QRubberBand</a> should have. This is a drawing hint that is passed down to the style system, and can be interpreted by each <a href="qstyle.html">QStyle</a>.</p> <table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr> <tr><td class="topAlign"><tt>QRubberBand::Line</tt></td><td class="topAlign"><tt>0</tt></td><td class="topAlign">A <a href="qrubberband.html">QRubberBand</a> can represent a vertical or horizontal line. Geometry is still given in <a href="qwidget.html#rect-prop">rect</a>() and the line will fill the given geometry on most styles.</td></tr> <tr><td class="topAlign"><tt>QRubberBand::Rectangle</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">A <a href="qrubberband.html">QRubberBand</a> can represent a rectangle. Some styles will interpret this as a filled (often semi-transparent) rectangle, or a rectangular outline.</td></tr> </table> <!-- @@@Shape --> </div> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$QRubberBand[overload1]$$$QRubberBandShapeQWidget* --> <h3 class="fn"><a name="QRubberBand"></a>QRubberBand::<span class="name">QRubberBand</span> ( <span class="type"><a href="qrubberband.html#Shape-enum">Shape</a></span> <i>s</i>, <span class="type"><a href="qwidget.html">QWidget</a></span> * <i>p</i> = 0 )</h3> <p>Constructs a rubber band of shape <i>s</i>, with parent <i>p</i>.</p> <p>By default a rectangular rubber band (<i>s</i> is <tt>Rectangle</tt>) will use a mask, so that a small border of the rectangle is all that is visible. Some styles (e.g., native Mac OS X) will change this and call <a href="qwidget.html#windowOpacity-prop">QWidget::setWindowOpacity</a>() to make a semi-transparent filled selection rectangle.</p> <!-- @@@QRubberBand --> <!-- $$$~QRubberBand[overload1]$$$~QRubberBand --> <h3 class="fn"><a name="dtor.QRubberBand"></a>QRubberBand::<span class="name">~QRubberBand</span> ()</h3> <p>Destructor.</p> <!-- @@@~QRubberBand --> <!-- $$$changeEvent[overload1]$$$changeEventQEvent* --> <h3 class="fn"><a name="changeEvent"></a><span class="type">void</span> QRubberBand::<span class="name">changeEvent</span> ( <span class="type"><a href="qevent.html">QEvent</a></span> * <i>e</i> )<tt> [virtual protected]</tt></h3> <p>Reimplemented from <a href="qwidget.html#changeEvent">QWidget::changeEvent</a>().</p> <!-- @@@changeEvent --> <!-- $$$event[overload1]$$$eventQEvent* --> <h3 class="fn"><a name="event"></a><span class="type">bool</span> QRubberBand::<span class="name">event</span> ( <span class="type"><a href="qevent.html">QEvent</a></span> * <i>e</i> )<tt> [virtual protected]</tt></h3> <p>Reimplemented from <a href="qobject.html#event">QObject::event</a>().</p> <!-- @@@event --> <!-- $$$initStyleOption[overload1]$$$initStyleOptionQStyleOptionRubberBand* --> <h3 class="fn"><a name="initStyleOption"></a><span class="type">void</span> QRubberBand::<span class="name">initStyleOption</span> ( <span class="type"><a href="qstyleoptionrubberband.html">QStyleOptionRubberBand</a></span> * <i>option</i> ) const<tt> [protected]</tt></h3> <p>Initialize <i>option</i> with the values from this <a href="qrubberband.html">QRubberBand</a>. This method is useful for subclasses when they need a <a href="qstyleoptionrubberband.html">QStyleOptionRubberBand</a>, but don't want to fill in all the information themselves.</p> <p><b>See also </b><a href="qstyleoption.html#initFrom">QStyleOption::initFrom</a>().</p> <!-- @@@initStyleOption --> <!-- $$$move[overload1]$$$moveintint --> <h3 class="fn"><a name="move"></a><span class="type">void</span> QRubberBand::<span class="name">move</span> ( <span class="type">int</span> <i>x</i>, <span class="type">int</span> <i>y</i> )</h3> <p>Moves the rubberband to point (<i>x</i>, <i>y</i>).</p> <p><b>See also </b><a href="qrubberband.html#resize">resize</a>().</p> <!-- @@@move --> <!-- $$$move$$$moveconstQPoint& --> <h3 class="fn"><a name="move-2"></a><span class="type">void</span> QRubberBand::<span class="name">move</span> ( const <span class="type"><a href="qpoint.html">QPoint</a></span> & <i>p</i> )</h3> <p>This is an overloaded function.</p> <p>Moves the rubberband to point <i>p</i>.</p> <p><b>See also </b><a href="qrubberband.html#resize">resize</a>().</p> <!-- @@@move --> <!-- $$$moveEvent[overload1]$$$moveEventQMoveEvent* --> <h3 class="fn"><a name="moveEvent"></a><span class="type">void</span> QRubberBand::<span class="name">moveEvent</span> ( <span class="type"><a href="qmoveevent.html">QMoveEvent</a></span> * )<tt> [virtual protected]</tt></h3> <p>Reimplemented from <a href="qwidget.html#moveEvent">QWidget::moveEvent</a>().</p> <!-- @@@moveEvent --> <!-- $$$paintEvent[overload1]$$$paintEventQPaintEvent* --> <h3 class="fn"><a name="paintEvent"></a><span class="type">void</span> QRubberBand::<span class="name">paintEvent</span> ( <span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> * )<tt> [virtual protected]</tt></h3> <p>Reimplemented from <a href="qwidget.html#paintEvent">QWidget::paintEvent</a>().</p> <!-- @@@paintEvent --> <!-- $$$resize[overload1]$$$resizeintint --> <h3 class="fn"><a name="resize"></a><span class="type">void</span> QRubberBand::<span class="name">resize</span> ( <span class="type">int</span> <i>width</i>, <span class="type">int</span> <i>height</i> )</h3> <p>Resizes the rubberband so that its width is <i>width</i>, and its height is <i>height</i>.</p> <p><b>See also </b><a href="qrubberband.html#move">move</a>().</p> <!-- @@@resize --> <!-- $$$resize$$$resizeconstQSize& --> <h3 class="fn"><a name="resize-2"></a><span class="type">void</span> QRubberBand::<span class="name">resize</span> ( const <span class="type"><a href="qsize.html">QSize</a></span> & <i>size</i> )</h3> <p>This is an overloaded function.</p> <p>Resizes the rubberband so that its new size is <i>size</i>.</p> <p><b>See also </b><a href="qrubberband.html#move">move</a>().</p> <!-- @@@resize --> <!-- $$$resizeEvent[overload1]$$$resizeEventQResizeEvent* --> <h3 class="fn"><a name="resizeEvent"></a><span class="type">void</span> QRubberBand::<span class="name">resizeEvent</span> ( <span class="type"><a href="qresizeevent.html">QResizeEvent</a></span> * )<tt> [virtual protected]</tt></h3> <p>Reimplemented from <a href="qwidget.html#resizeEvent">QWidget::resizeEvent</a>().</p> <!-- @@@resizeEvent --> <!-- $$$setGeometry[overload1]$$$setGeometryconstQRect& --> <h3 class="fn"><a name="setGeometry"></a><span class="type">void</span> QRubberBand::<span class="name">setGeometry</span> ( const <span class="type"><a href="qrect.html">QRect</a></span> & <i>rect</i> )</h3> <p>Sets the geometry of the rubber band to <i>rect</i>, specified in the coordinate system of its parent widget.</p> <p><b>See also </b><a href="qwidget.html#geometry-prop">QWidget::geometry</a>.</p> <!-- @@@setGeometry --> <!-- $$$setGeometry$$$setGeometryintintintint --> <h3 class="fn"><a name="setGeometry-2"></a><span class="type">void</span> QRubberBand::<span class="name">setGeometry</span> ( <span class="type">int</span> <i>x</i>, <span class="type">int</span> <i>y</i>, <span class="type">int</span> <i>width</i>, <span class="type">int</span> <i>height</i> )</h3> <p>This is an overloaded function.</p> <p>Sets the geometry of the rubberband to the rectangle whose top-left corner lies at the point (<i>x</i>, <i>y</i>), and with dimensions specified by <i>width</i> and <i>height</i>. The geometry is specified in the parent widget's coordinate system.</p> <!-- @@@setGeometry --> <!-- $$$shape[overload1]$$$shape --> <h3 class="fn"><a name="shape"></a><span class="type"><a href="qrubberband.html#Shape-enum">Shape</a></span> QRubberBand::<span class="name">shape</span> () const</h3> <p>Returns the shape of this rubber band. The shape can only be set upon construction.</p> <!-- @@@shape --> <!-- $$$showEvent[overload1]$$$showEventQShowEvent* --> <h3 class="fn"><a name="showEvent"></a><span class="type">void</span> QRubberBand::<span class="name">showEvent</span> ( <span class="type"><a href="qshowevent.html">QShowEvent</a></span> * <i>e</i> )<tt> [virtual protected]</tt></h3> <p>Reimplemented from <a href="qwidget.html#showEvent">QWidget::showEvent</a>().</p> <!-- @@@showEvent --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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