<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qcursor.cpp:47 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>QCursor Class</title> <style type="text/css"><!-- fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QCursor Class Reference</h1> <p>The QCursor class provides a mouse cursor with an arbitrary shape. <a href="#details">More...</a> <p><tt>#include <<a href="qcursor-h.html">qcursor.h</a>></tt> <p>Inherits <a href="qt.html">Qt</a>. <p><a href="qcursor-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li class=fn><a href="#QCursor"><b>QCursor</b></a> ()</li> <li class=fn><a href="#QCursor-2"><b>QCursor</b></a> ( int shape )</li> <li class=fn><a href="#QCursor-3"><b>QCursor</b></a> ( const QBitmap & bitmap, const QBitmap & mask, int hotX = -1, int hotY = -1 )</li> <li class=fn><a href="#QCursor-4"><b>QCursor</b></a> ( const QPixmap & pixmap, int hotX = -1, int hotY = -1 )</li> <li class=fn><a href="#QCursor-5"><b>QCursor</b></a> ( const QCursor & c )</li> <li class=fn><a href="#~QCursor"><b>~QCursor</b></a> ()</li> <li class=fn>QCursor & <a href="#operator-eq"><b>operator=</b></a> ( const QCursor & c )</li> <li class=fn>int <a href="#shape"><b>shape</b></a> () const</li> <li class=fn>void <a href="#setShape"><b>setShape</b></a> ( int shape )</li> <li class=fn>const QBitmap * <a href="#bitmap"><b>bitmap</b></a> () const</li> <li class=fn>const QBitmap * <a href="#mask"><b>mask</b></a> () const</li> <li class=fn>QPoint <a href="#hotSpot"><b>hotSpot</b></a> () const</li> <li class=fn>HCURSOR <b>handle</b> () const</li> <li class=fn><a href="#QCursor-6"><b>QCursor</b></a> ( HCURSOR handle )</li> <li class=fn>HANDLE <a href="#handle"><b>handle</b></a> () const</li> </ul> <h2>Static Public Members</h2> <ul> <li class=fn>QPoint <a href="#pos"><b>pos</b></a> ()</li> <li class=fn>void <a href="#setPos"><b>setPos</b></a> ( int x, int y )</li> <li class=fn>void <a href="#setPos-2"><b>setPos</b></a> ( const QPoint & )</li> <li class=fn>void <a href="#initialize"><b>initialize</b></a> ()</li> <li class=fn>void <a href="#cleanup"><b>cleanup</b></a> ()</li> </ul> <h2>Related Functions</h2> <ul> <li class=fn>QDataStream & <a href="#operator-lt-lt"><b>operator<<</b></a> ( QDataStream & s, const QCursor & c )</li> <li class=fn>QDataStream & <a href="#operator-gt-gt"><b>operator>></b></a> ( QDataStream & s, QCursor & c )</li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> <p> The QCursor class provides a mouse cursor with an arbitrary shape. <p> <p> This class is mainly used to create mouse cursors that are associated with particular widgets and to get and set the position of the mouse cursor. <p> Qt has a number of standard cursor shapes, but you can also make custom cursor shapes based on a <a href="qbitmap.html">QBitmap</a>, a mask and a hotspot. <p> To associate a cursor with a widget, use <a href="qwidget.html#setCursor">QWidget::setCursor</a>(). To associate a cursor with all widgets (normally for a short period of time), use <a href="qapplication.html#setOverrideCursor">QApplication::setOverrideCursor</a>(). <p> To set a cursor shape use <a href="#setShape">QCursor::setShape</a>() or use the QCursor constructor which takes the shape as argument, or you can use one of the predefined cursors defined in the <a href="qt.html#CursorShape-enum">CursorShape</a> enum. <p> If you want to create a cursor with your own bitmap, either use the QCursor constructor which takes a bitmap and a mask or the constructor which takes a pixmap as arguments. <p> To set or get the position of the mouse cursor use the static methods <a href="#pos">QCursor::pos</a>() and <a href="#setPos">QCursor::setPos</a>(). <p> <center><img src="cursors.png" alt="Cursor Shapes"></center> <p> <p>See also <a href="qwidget.html">QWidget</a>, <a href="guibooks.html#fowler">GUI Design Handbook: Cursors</a>, <a href="appearance.html">Widget Appearance and Style</a>, and <a href="shared.html">Implicitly and Explicitly Shared Classes</a>. <p> On X11, Qt supports the <a href="http://www.xfree86.org/4.3.0/Xcursor.3.html">Xcursor</a> library, which allows for full color icon themes. The table below shows the cursor name used for each Qt::CursorShape value. If a cursor cannot be found using the name shown below, a standard X11 cursor will be used instead. Note: X11 does not provide appropriate cursors for all possible Qt::CursorShape values. It is possible that some cursors will be taken from the Xcursor theme, while others will use an internal bitmap cursor. <p> <center><table cellpadding="4" cellspacing="2" border="0"> <tr bgcolor="#a2c511"> <th valign="top">Qt::CursorShape Values <th valign="top">Cursor Names <tr bgcolor="#f0f0f0"> <td valign="top">Qt::ArrowCursor <td valign="top">left_ptr <tr bgcolor="#d0d0d0"> <td valign="top">Qt::UpArrowCursor <td valign="top">up_arrow <tr bgcolor="#f0f0f0"> <td valign="top">Qt::CrossCursor <td valign="top">cross <tr bgcolor="#d0d0d0"> <td valign="top">Qt::WaitCursor <td valign="top">wait <tr bgcolor="#f0f0f0"> <td valign="top">Qt::BusyCursor <td valign="top">left_ptr_watch <tr bgcolor="#d0d0d0"> <td valign="top">Qt::IbeamCursor <td valign="top">ibeam <tr bgcolor="#f0f0f0"> <td valign="top">Qt::SizeVerCursor <td valign="top">size_ver <tr bgcolor="#d0d0d0"> <td valign="top">Qt::SizeHorCursor <td valign="top">size_hor <tr bgcolor="#f0f0f0"> <td valign="top">Qt::SizeBDiagCursor <td valign="top">size_bdiag <tr bgcolor="#d0d0d0"> <td valign="top">Qt::SizeFDiagCursor <td valign="top">size_fdiag <tr bgcolor="#f0f0f0"> <td valign="top">Qt::SizeAllCursor <td valign="top">size_all <tr bgcolor="#d0d0d0"> <td valign="top">Qt::SplitVCursor <td valign="top">split_v <tr bgcolor="#f0f0f0"> <td valign="top">Qt::SplitHCursor <td valign="top">split_h <tr bgcolor="#d0d0d0"> <td valign="top">Qt::PointingHandCursor <td valign="top">pointing_hand <tr bgcolor="#f0f0f0"> <td valign="top">Qt::ForbiddenCursor <td valign="top">forbidden <tr bgcolor="#d0d0d0"> <td valign="top">Qt::WhatsThisCursor <td valign="top">whats_this </table></center> <hr><h2>Member Function Documentation</h2> <h3 class=fn><a name="QCursor"></a>QCursor::QCursor () </h3> Constructs a cursor with the default arrow shape. <h3 class=fn><a name="QCursor-2"></a>QCursor::QCursor ( int shape ) </h3> Constructs a cursor with the specified <em>shape</em>. <p> See <a href="qt.html#CursorShape-enum">CursorShape</a> for a list of shapes. <p> <p>See also <a href="#setShape">setShape</a>(). <h3 class=fn><a name="QCursor-3"></a>QCursor::QCursor ( const <a href="qbitmap.html">QBitmap</a> & bitmap, const <a href="qbitmap.html">QBitmap</a> & mask, int hotX = -1, int hotY = -1 ) </h3> Constructs a custom bitmap cursor. <p> <em>bitmap</em> and <em>mask</em> make up the bitmap. <em>hotX</em> and <em>hotY</em> define the cursor's hot spot. <p> If <em>hotX</em> is negative, it is set to the <tt>bitmap().width()/2</tt>. If <em>hotY</em> is negative, it is set to the <tt>bitmap().height()/2</tt>. <p> The cursor <em>bitmap</em> (B) and <em>mask</em> (M) bits are combined like this: <ul> <li> B=1 and M=1 gives black. <li> B=0 and M=1 gives white. <li> B=0 and M=0 gives transparent. <li> B=1 and M=0 gives an undefined result. </ul> <p> Use the global Qt color <tt>color0</tt> to draw 0-pixels and <tt>color1</tt> to draw 1-pixels in the bitmaps. <p> Valid cursor sizes depend on the display hardware (or the underlying window system). We recommend using 32x32 cursors, because this size is supported on all platforms. Some platforms also support 16x16, 48x48 and 64x64 cursors. <p> <p>See also <a href="qbitmap.html#QBitmap">QBitmap::QBitmap</a>() and <a href="qpixmap.html#setMask">QBitmap::setMask</a>(). <h3 class=fn><a name="QCursor-4"></a>QCursor::QCursor ( const <a href="qpixmap.html">QPixmap</a> & pixmap, int hotX = -1, int hotY = -1 ) </h3> Constructs a custom pixmap cursor. <p> <em>pixmap</em> is the image. It is usual to give it a mask (set using <a href="qpixmap.html#setMask">QPixmap::setMask</a>()). <em>hotX</em> and <em>hotY</em> define the cursor's hot spot. <p> If <em>hotX</em> is negative, it is set to the <tt>pixmap().width()/2</tt>. If <em>hotY</em> is negative, it is set to the <tt>pixmap().height()/2</tt>. <p> Valid cursor sizes depend on the display hardware (or the underlying window system). We recommend using 32x32 cursors, because this size is supported on all platforms. Some platforms also support 16x16, 48x48 and 64x64 cursors. <p> Currently, only black-and-white pixmaps can be used. <p> <p>See also <a href="qpixmap.html#QPixmap">QPixmap::QPixmap</a>() and <a href="qpixmap.html#setMask">QPixmap::setMask</a>(). <h3 class=fn><a name="QCursor-5"></a>QCursor::QCursor ( const <a href="qcursor.html">QCursor</a> & c ) </h3> Constructs a copy of the cursor <em>c</em>. <h3 class=fn><a name="QCursor-6"></a>QCursor::QCursor ( HCURSOR handle ) </h3> <p> Creates a cursor with the specified window system handle <em>handle</em>. <p> <b>Warning:</b> Portable in principle, but if you use it you are probably about to do something non-portable. Be careful. <h3 class=fn><a name="~QCursor"></a>QCursor::~QCursor () </h3> Destroys the cursor. <h3 class=fn>const <a href="qbitmap.html">QBitmap</a> * <a name="bitmap"></a>QCursor::bitmap () const </h3> Returns the cursor bitmap, or 0 if it is one of the standard cursors. <h3 class=fn>void <a name="cleanup"></a>QCursor::cleanup ()<tt> [static]</tt> </h3> Internal function that deinitializes the predefined cursors. This function is called from the <a href="qapplication.html">QApplication</a> destructor. <p> <p>See also <a href="#initialize">initialize</a>(). <h3 class=fn>HANDLE <a name="handle"></a>QCursor::handle () const </h3> Returns the window system cursor handle. <p> <b>Warning:</b> Portable in principle, but if you use it you are probably about to do something non-portable. Be careful. <h3 class=fn><a href="qpoint.html">QPoint</a> <a name="hotSpot"></a>QCursor::hotSpot () const </h3> Returns the cursor hot spot, or (0, 0) if it is one of the standard cursors. <h3 class=fn>void <a name="initialize"></a>QCursor::initialize ()<tt> [static]</tt> </h3> Internal function that initializes the predefined cursors. This function is called from the <a href="qapplication.html">QApplication</a> constructor. <p> <p>See also <a href="#cleanup">cleanup</a>(). <h3 class=fn>const <a href="qbitmap.html">QBitmap</a> * <a name="mask"></a>QCursor::mask () const </h3> Returns the cursor bitmap mask, or 0 if it is one of the standard cursors. <h3 class=fn><a href="qcursor.html">QCursor</a> & <a name="operator-eq"></a>QCursor::operator= ( const <a href="qcursor.html">QCursor</a> & c ) </h3> Assigns <em>c</em> to this cursor and returns a reference to this cursor. <h3 class=fn><a href="qpoint.html">QPoint</a> <a name="pos"></a>QCursor::pos ()<tt> [static]</tt> </h3> Returns the position of the cursor (hot spot) in global screen coordinates. <p> You can call <a href="qwidget.html#mapFromGlobal">QWidget::mapFromGlobal</a>() to translate it to widget coordinates. <p> <p>See also <a href="#setPos">setPos</a>(), <a href="qwidget.html#mapFromGlobal">QWidget::mapFromGlobal</a>(), and <a href="qwidget.html#mapToGlobal">QWidget::mapToGlobal</a>(). <p>Examples: <a href="tutorial2-06.html#x2579">chart/canvasview.cpp</a>, <a href="fileiconview-example.html#x809">fileiconview/qfileiconview.cpp</a>, and <a href="menu-example.html#x1859">menu/menu.cpp</a>. <h3 class=fn>void <a name="setPos"></a>QCursor::setPos ( int x, int y )<tt> [static]</tt> </h3> Moves the cursor (hot spot) to the global screen position (<em>x</em>, <em>y</em>). <p> You can call <a href="qwidget.html#mapToGlobal">QWidget::mapToGlobal</a>() to translate widget coordinates to global screen coordinates. <p> <p>See also <a href="#pos">pos</a>(), <a href="qwidget.html#mapFromGlobal">QWidget::mapFromGlobal</a>(), and <a href="qwidget.html#mapToGlobal">QWidget::mapToGlobal</a>(). <h3 class=fn>void <a name="setPos-2"></a>QCursor::setPos ( const <a href="qpoint.html">QPoint</a> & )<tt> [static]</tt> </h3> This is an overloaded member function, provided for convenience. It behaves essentially like the above function. <p> <h3 class=fn>void <a name="setShape"></a>QCursor::setShape ( int shape ) </h3> Sets the cursor to the shape identified by <em>shape</em>. <p> See <a href="qt.html#CursorShape-enum">CursorShape</a> for the list of cursor shapes. <p> <p>See also <a href="#shape">shape</a>(). <h3 class=fn>int <a name="shape"></a>QCursor::shape () const </h3> Returns the cursor shape identifier. The return value is one of the <a href="qt.html#CursorShape-enum">CursorShape</a> enum values (cast to an int). <p> <p>See also <a href="#setShape">setShape</a>(). <hr><h2>Related Functions</h2> <h3 class=fn><a href="qdatastream.html">QDataStream</a> & <a name="operator-lt-lt"></a>operator<< ( <a href="qdatastream.html">QDataStream</a> & s, const <a href="qcursor.html">QCursor</a> & c ) </h3> Writes the cursor <em>c</em> to the stream <em>s</em>. <p> <p>See also <a href="datastreamformat.html">Format of the QDataStream operators</a>. <h3 class=fn><a href="qdatastream.html">QDataStream</a> & <a name="operator-gt-gt"></a>operator>> ( <a href="qdatastream.html">QDataStream</a> & s, <a href="qcursor.html">QCursor</a> & c ) </h3> Reads a cursor from the stream <em>s</em> and sets <em>c</em> to the read data. <p> <p>See also <a href="datastreamformat.html">Format of the QDataStream operators</a>. <!-- eof --> <hr><p> This file is part of the <a href="index.html">Qt toolkit</a>. 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