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288 lines
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288 lines
15 KiB
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qcursor.cpp:47 -->
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<title>TQCursor Class</title>
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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>TQCursor Class Reference</h1>
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<p>The TQCursor class provides a mouse cursor with an arbitrary
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shape.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qcursor-h.html">ntqcursor.h</a>></tt>
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<p>Inherits <a href="ntqt.html">TQt</a>.
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<p><a href="qcursor-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQCursor"><b>TQCursor</b></a> ()</li>
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<li class=fn><a href="#TQCursor-2"><b>TQCursor</b></a> ( int shape )</li>
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<li class=fn><a href="#TQCursor-3"><b>TQCursor</b></a> ( const TQBitmap & bitmap, const TQBitmap & mask, int hotX = -1, int hotY = -1 )</li>
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<li class=fn><a href="#TQCursor-4"><b>TQCursor</b></a> ( const TQPixmap & pixmap, int hotX = -1, int hotY = -1 )</li>
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<li class=fn><a href="#TQCursor-5"><b>TQCursor</b></a> ( const TQCursor & c )</li>
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<li class=fn><a href="#~TQCursor"><b>~TQCursor</b></a> ()</li>
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<li class=fn>TQCursor & <a href="#operator-eq"><b>operator=</b></a> ( const TQCursor & c )</li>
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<li class=fn>int <a href="#shape"><b>shape</b></a> () const</li>
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<li class=fn>void <a href="#setShape"><b>setShape</b></a> ( int shape )</li>
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<li class=fn>const TQBitmap * <a href="#bitmap"><b>bitmap</b></a> () const</li>
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<li class=fn>const TQBitmap * <a href="#mask"><b>mask</b></a> () const</li>
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<li class=fn>TQPoint <a href="#hotSpot"><b>hotSpot</b></a> () const</li>
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<li class=fn>HCURSOR <b>handle</b> () const</li>
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<li class=fn><a href="#TQCursor-6"><b>TQCursor</b></a> ( HCURSOR handle )</li>
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<li class=fn>HANDLE <a href="#handle"><b>handle</b></a> () const</li>
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</ul>
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<h2>Static Public Members</h2>
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<ul>
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<li class=fn>TQPoint <a href="#pos"><b>pos</b></a> ()</li>
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<li class=fn>void <a href="#setPos"><b>setPos</b></a> ( int x, int y )</li>
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<li class=fn>void <a href="#setPos-2"><b>setPos</b></a> ( const TQPoint & )</li>
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<li class=fn>void <a href="#initialize"><b>initialize</b></a> ()</li>
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<li class=fn>void <a href="#cleanup"><b>cleanup</b></a> ()</li>
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</ul>
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<h2>Related Functions</h2>
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<ul>
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<li class=fn>TQDataStream & <a href="#operator-lt-lt"><b>operator<<</b></a> ( TQDataStream & s, const TQCursor & c )</li>
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<li class=fn>TQDataStream & <a href="#operator-gt-gt"><b>operator>></b></a> ( TQDataStream & s, TQCursor & c )</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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<p> The TQCursor class provides a mouse cursor with an arbitrary
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shape.
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<p>
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<p> This class is mainly used to create mouse cursors that are
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associated with particular widgets and to get and set the position
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of the mouse cursor.
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<p> TQt has a number of standard cursor shapes, but you can also make
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custom cursor shapes based on a <a href="ntqbitmap.html">TQBitmap</a>, a mask and a hotspot.
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<p> To associate a cursor with a widget, use <a href="tqwidget.html#setCursor">TQWidget::setCursor</a>(). To
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associate a cursor with all widgets (normally for a short period
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of time), use <a href="ntqapplication.html#setOverrideCursor">TQApplication::setOverrideCursor</a>().
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<p> To set a cursor shape use <a href="#setShape">TQCursor::setShape</a>() or use the TQCursor
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constructor which takes the shape as argument, or you can use one
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of the predefined cursors defined in the <a href="ntqt.html#CursorShape-enum">CursorShape</a> enum.
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<p> If you want to create a cursor with your own bitmap, either use
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the TQCursor constructor which takes a bitmap and a mask or the
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constructor which takes a pixmap as arguments.
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<p> To set or get the position of the mouse cursor use the static
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methods <a href="#pos">TQCursor::pos</a>() and <a href="#setPos">TQCursor::setPos</a>().
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<p> <center><img src="cursors.png" alt="Cursor Shapes"></center>
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<p> <p>See also <a href="tqwidget.html">TQWidget</a>, <a href="guibooks.html#fowler">GUI Design Handbook:
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Cursors</a>, <a href="appearance.html">Widget Appearance and Style</a>, and <a href="shared.html">Implicitly and Explicitly Shared Classes</a>.
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<p> On X11, TQt supports the <a href="http://www.xfree86.org/4.3.0/Xcursor.3.html">Xcursor</a>
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library, which allows for full color icon themes. The table below
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shows the cursor name used for each TQt::CursorShape value. If a
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cursor cannot be found using the name shown below, a standard X11
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cursor will be used instead. Note: X11 does not provide
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appropriate cursors for all possible TQt::CursorShape values. It
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is possible that some cursors will be taken from the Xcursor
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theme, while others will use an internal bitmap cursor.
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<p> <center><table cellpadding="4" cellspacing="2" border="0">
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<tr bgcolor="#a2c511"> <th valign="top">TQt::CursorShape Values <th valign="top">Cursor Names
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<tr bgcolor="#f0f0f0"> <td valign="top">TQt::ArrowCursor <td valign="top">left_ptr
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<tr bgcolor="#d0d0d0"> <td valign="top">TQt::UpArrowCursor <td valign="top">up_arrow
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<tr bgcolor="#f0f0f0"> <td valign="top">TQt::CrossCursor <td valign="top">cross
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<tr bgcolor="#d0d0d0"> <td valign="top">TQt::WaitCursor <td valign="top">wait
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<tr bgcolor="#f0f0f0"> <td valign="top">TQt::BusyCursor <td valign="top">left_ptr_watch
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<tr bgcolor="#d0d0d0"> <td valign="top">TQt::IbeamCursor <td valign="top">ibeam
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<tr bgcolor="#f0f0f0"> <td valign="top">TQt::SizeVerCursor <td valign="top">size_ver
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<tr bgcolor="#d0d0d0"> <td valign="top">TQt::SizeHorCursor <td valign="top">size_hor
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<tr bgcolor="#f0f0f0"> <td valign="top">TQt::SizeBDiagCursor <td valign="top">size_bdiag
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<tr bgcolor="#d0d0d0"> <td valign="top">TQt::SizeFDiagCursor <td valign="top">size_fdiag
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<tr bgcolor="#f0f0f0"> <td valign="top">TQt::SizeAllCursor <td valign="top">size_all
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<tr bgcolor="#d0d0d0"> <td valign="top">TQt::SplitVCursor <td valign="top">split_v
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<tr bgcolor="#f0f0f0"> <td valign="top">TQt::SplitHCursor <td valign="top">split_h
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<tr bgcolor="#d0d0d0"> <td valign="top">TQt::PointingHandCursor <td valign="top">pointing_hand
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<tr bgcolor="#f0f0f0"> <td valign="top">TQt::ForbiddenCursor <td valign="top">forbidden
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<tr bgcolor="#d0d0d0"> <td valign="top">TQt::WhatsThisCursor <td valign="top">whats_this
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</table></center>
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQCursor"></a>TQCursor::TQCursor ()
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</h3>
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Constructs a cursor with the default arrow shape.
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<h3 class=fn><a name="TQCursor-2"></a>TQCursor::TQCursor ( int shape )
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</h3>
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Constructs a cursor with the specified <em>shape</em>.
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<p> See <a href="ntqt.html#CursorShape-enum">CursorShape</a> for a list of shapes.
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<p> <p>See also <a href="#setShape">setShape</a>().
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<h3 class=fn><a name="TQCursor-3"></a>TQCursor::TQCursor ( const <a href="ntqbitmap.html">TQBitmap</a> & bitmap, const <a href="ntqbitmap.html">TQBitmap</a> & mask, int hotX = -1, int hotY = -1 )
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</h3>
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Constructs a custom bitmap cursor.
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<p> <em>bitmap</em> and
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<em>mask</em> make up the bitmap.
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<em>hotX</em> and
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<em>hotY</em> define the cursor's hot spot.
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<p> If <em>hotX</em> is negative, it is set to the <tt>bitmap().width()/2</tt>.
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If <em>hotY</em> is negative, it is set to the <tt>bitmap().height()/2</tt>.
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<p> The cursor <em>bitmap</em> (B) and <em>mask</em> (M) bits are combined like this:
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<ul>
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<li> B=1 and M=1 gives black.
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<li> B=0 and M=1 gives white.
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<li> B=0 and M=0 gives transparent.
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<li> B=1 and M=0 gives an undefined result.
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</ul>
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<p> Use the global TQt color <tt>color0</tt> to draw 0-pixels and <tt>color1</tt> to
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draw 1-pixels in the bitmaps.
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<p> Valid cursor sizes depend on the display hardware (or the
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underlying window system). We recommend using 32x32 cursors,
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because this size is supported on all platforms. Some platforms
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also support 16x16, 48x48 and 64x64 cursors.
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<p> <p>See also <a href="ntqbitmap.html#TQBitmap">TQBitmap::TQBitmap</a>() and <a href="ntqpixmap.html#setMask">TQBitmap::setMask</a>().
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<h3 class=fn><a name="TQCursor-4"></a>TQCursor::TQCursor ( const <a href="ntqpixmap.html">TQPixmap</a> & pixmap, int hotX = -1, int hotY = -1 )
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</h3>
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Constructs a custom pixmap cursor.
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<p> <em>pixmap</em> is the image. It is usual to give it a mask (set using
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<a href="ntqpixmap.html#setMask">TQPixmap::setMask</a>()). <em>hotX</em> and <em>hotY</em> define the cursor's hot
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spot.
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<p> If <em>hotX</em> is negative, it is set to the <tt>pixmap().width()/2</tt>.
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If <em>hotY</em> is negative, it is set to the <tt>pixmap().height()/2</tt>.
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<p> Valid cursor sizes depend on the display hardware (or the
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underlying window system). We recommend using 32x32 cursors,
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because this size is supported on all platforms. Some platforms
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also support 16x16, 48x48 and 64x64 cursors.
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<p> Currently, only black-and-white pixmaps can be used.
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<p> <p>See also <a href="ntqpixmap.html#TQPixmap">TQPixmap::TQPixmap</a>() and <a href="ntqpixmap.html#setMask">TQPixmap::setMask</a>().
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<h3 class=fn><a name="TQCursor-5"></a>TQCursor::TQCursor ( const <a href="ntqcursor.html">TQCursor</a> & c )
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</h3>
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Constructs a copy of the cursor <em>c</em>.
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<h3 class=fn><a name="TQCursor-6"></a>TQCursor::TQCursor ( HCURSOR handle )
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</h3>
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<p> Creates a cursor with the specified window system handle <em>handle</em>.
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<p> <b>Warning:</b>
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Portable in principle, but if you use it you are probably about to
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do something non-portable. Be careful.
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<h3 class=fn><a name="~TQCursor"></a>TQCursor::~TQCursor ()
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</h3>
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Destroys the cursor.
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<h3 class=fn>const <a href="ntqbitmap.html">TQBitmap</a> * <a name="bitmap"></a>TQCursor::bitmap () const
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</h3>
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Returns the cursor bitmap, or 0 if it is one of the standard
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cursors.
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<h3 class=fn>void <a name="cleanup"></a>TQCursor::cleanup ()<tt> [static]</tt>
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</h3>
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Internal function that deinitializes the predefined cursors.
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This function is called from the <a href="ntqapplication.html">TQApplication</a> destructor.
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<p> <p>See also <a href="#initialize">initialize</a>().
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<h3 class=fn>HANDLE <a name="handle"></a>TQCursor::handle () const
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</h3>
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Returns the window system cursor handle.
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<p> <b>Warning:</b>
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Portable in principle, but if you use it you are probably about to
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do something non-portable. Be careful.
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<h3 class=fn><a href="ntqpoint.html">TQPoint</a> <a name="hotSpot"></a>TQCursor::hotSpot () const
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</h3>
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Returns the cursor hot spot, or (0, 0) if it is one of the
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standard cursors.
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<h3 class=fn>void <a name="initialize"></a>TQCursor::initialize ()<tt> [static]</tt>
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</h3>
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Internal function that initializes the predefined cursors.
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This function is called from the <a href="ntqapplication.html">TQApplication</a> constructor.
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<p> <p>See also <a href="#cleanup">cleanup</a>().
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<h3 class=fn>const <a href="ntqbitmap.html">TQBitmap</a> * <a name="mask"></a>TQCursor::mask () const
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</h3>
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Returns the cursor bitmap mask, or 0 if it is one of the standard
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cursors.
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<h3 class=fn><a href="ntqcursor.html">TQCursor</a> & <a name="operator-eq"></a>TQCursor::operator= ( const <a href="ntqcursor.html">TQCursor</a> & c )
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</h3>
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Assigns <em>c</em> to this cursor and returns a reference to this
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cursor.
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<h3 class=fn><a href="ntqpoint.html">TQPoint</a> <a name="pos"></a>TQCursor::pos ()<tt> [static]</tt>
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</h3>
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Returns the position of the cursor (hot spot) in global screen
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coordinates.
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<p> You can call <a href="tqwidget.html#mapFromGlobal">TQWidget::mapFromGlobal</a>() to translate it to widget
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coordinates.
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<p> <p>See also <a href="#setPos">setPos</a>(), <a href="tqwidget.html#mapFromGlobal">TQWidget::mapFromGlobal</a>(), and <a href="tqwidget.html#mapToGlobal">TQWidget::mapToGlobal</a>().
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<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>.
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<h3 class=fn>void <a name="setPos"></a>TQCursor::setPos ( int x, int y )<tt> [static]</tt>
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</h3>
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Moves the cursor (hot spot) to the global screen position (<em>x</em>,
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<em>y</em>).
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<p> You can call <a href="tqwidget.html#mapToGlobal">TQWidget::mapToGlobal</a>() to translate widget
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coordinates to global screen coordinates.
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<p> <p>See also <a href="#pos">pos</a>(), <a href="tqwidget.html#mapFromGlobal">TQWidget::mapFromGlobal</a>(), and <a href="tqwidget.html#mapToGlobal">TQWidget::mapToGlobal</a>().
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<h3 class=fn>void <a name="setPos-2"></a>TQCursor::setPos ( const <a href="ntqpoint.html">TQPoint</a> & )<tt> [static]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p>
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<h3 class=fn>void <a name="setShape"></a>TQCursor::setShape ( int shape )
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</h3>
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Sets the cursor to the shape identified by <em>shape</em>.
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<p> See <a href="ntqt.html#CursorShape-enum">CursorShape</a> for the list of cursor shapes.
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<p> <p>See also <a href="#shape">shape</a>().
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<h3 class=fn>int <a name="shape"></a>TQCursor::shape () const
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</h3>
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Returns the cursor shape identifier. The return value is one of
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the <a href="ntqt.html#CursorShape-enum">CursorShape</a> enum values (cast to an int).
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<p> <p>See also <a href="#setShape">setShape</a>().
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<hr><h2>Related Functions</h2>
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<h3 class=fn><a href="ntqdatastream.html">TQDataStream</a> & <a name="operator-lt-lt"></a>operator<< ( <a href="ntqdatastream.html">TQDataStream</a> & s, const <a href="ntqcursor.html">TQCursor</a> & c )
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</h3>
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Writes the cursor <em>c</em> to the stream <em>s</em>.
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<p> <p>See also <a href="datastreamformat.html">Format of the TQDataStream operators</a>.
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<h3 class=fn><a href="ntqdatastream.html">TQDataStream</a> & <a name="operator-gt-gt"></a>operator>> ( <a href="ntqdatastream.html">TQDataStream</a> & s, <a href="ntqcursor.html">TQCursor</a> & c )
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</h3>
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Reads a cursor from the stream <em>s</em> and sets <em>c</em> to the read data.
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<p> <p>See also <a href="datastreamformat.html">Format of the TQDataStream operators</a>.
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">TQt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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</html>
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