/usr/share/qt3/doc/html/qdesktopwidget.html is in qt3-doc 3:3.3.8-b-8ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | <!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/qdesktopwidget_win.cpp:226 -->
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>QDesktopWidget 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>QDesktopWidget Class Reference</h1>
<p>The QDesktopWidget class provides access to screen information on multi-head systems.
<a href="#details">More...</a>
<p><tt>#include <<a href="qdesktopwidget-h.html">qdesktopwidget.h</a>></tt>
<p>Inherits <a href="qwidget.html">QWidget</a>.
<p><a href="qdesktopwidget-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li class=fn><a href="#QDesktopWidget"><b>QDesktopWidget</b></a> ()</li>
<li class=fn><a href="#~QDesktopWidget"><b>~QDesktopWidget</b></a> ()</li>
<li class=fn>bool <a href="#isVirtualDesktop"><b>isVirtualDesktop</b></a> () const</li>
<li class=fn>int <a href="#numScreens"><b>numScreens</b></a> () const</li>
<li class=fn>int <a href="#primaryScreen"><b>primaryScreen</b></a> () const</li>
<li class=fn>int <a href="#screenNumber"><b>screenNumber</b></a> ( QWidget * widget = 0 ) const</li>
<li class=fn>int <a href="#screenNumber-2"><b>screenNumber</b></a> ( const QPoint & point ) const</li>
<li class=fn>QWidget * <a href="#screen"><b>screen</b></a> ( int screen = -1 )</li>
<li class=fn>const QRect & <a href="#screenGeometry"><b>screenGeometry</b></a> ( int screen = -1 ) const</li>
<li class=fn>const QRect & <a href="#screenGeometry-2"><b>screenGeometry</b></a> ( QWidget * widget ) const</li>
<li class=fn>const QRect & <a href="#screenGeometry-3"><b>screenGeometry</b></a> ( const QPoint & p ) const</li>
<li class=fn>const QRect & <a href="#availableGeometry"><b>availableGeometry</b></a> ( int screen = -1 ) const</li>
<li class=fn>const QRect & <a href="#availableGeometry-2"><b>availableGeometry</b></a> ( QWidget * widget ) const</li>
<li class=fn>const QRect & <a href="#availableGeometry-3"><b>availableGeometry</b></a> ( const QPoint & p ) const</li>
</ul>
<h2>Signals</h2>
<ul>
<li class=fn>void <a href="#resized"><b>resized</b></a> ( int screen )</li>
</ul>
<hr><a name="details"></a><h2>Detailed Description</h2>
The QDesktopWidget class provides access to screen information on multi-head systems.
<p>
<p> Systems with more than one graphics card and monitor can manage the
physical screen space available either as multiple desktops, or as a
large virtual desktop, which usually has the size of the bounding
rectangle of all the screens (see <a href="#isVirtualDesktop">isVirtualDesktop</a>()). For an
application, one of the available screens is the primary screen, i.e.
the screen where the main widget resides (see <a href="#primaryScreen">primaryScreen</a>()). All
windows opened in the context of the application must be
constrained to the boundaries of the primary screen; for example,
it would be inconvenient if a dialog box popped up on a different
screen, or split over two screens.
<p> The QDesktopWidget provides information about the geometry of the
available screens with <a href="#screenGeometry">screenGeometry</a>(). The number of screens
available is returned by <a href="#numScreens">numScreens</a>(). The screen number that a
particular point or widget is located in is returned by
<a href="#screenNumber">screenNumber</a>().
<p> Widgets provided by Qt use this class, for example, to place
tooltips, menus and dialog boxes according to the parent or
application widget.
<p> Applications can use this class to save window positions, or to place
child widgets on one screen.
<p> <center><img src="qdesktopwidget.png" alt="Managing Multiple Screens"></center>
<p> In the illustration above, Application One's primary screen is
screen 0, and App Two's primary screen is screen 1.
<p> <p>See also <a href="advanced.html">Advanced Widgets</a> and <a href="environment.html">Environment Classes</a>.
<hr><h2>Member Function Documentation</h2>
<h3 class=fn><a name="QDesktopWidget"></a>QDesktopWidget::QDesktopWidget ()
</h3>
Creates the desktop widget.
<p> If the system supports a virtual desktop, this widget will have
the size of the virtual desktop; otherwise this widget will have
the size of the primary screen.
<p> Instead of using QDesktopWidget directly, use
<a href="qapplication.html#desktop">QApplication::desktop</a>().
<h3 class=fn><a name="~QDesktopWidget"></a>QDesktopWidget::~QDesktopWidget ()
</h3>
Destroy the object and free allocated resources.
<h3 class=fn>const <a href="qrect.html">QRect</a> & <a name="availableGeometry"></a>QDesktopWidget::availableGeometry ( int screen = -1 ) const
</h3>
Returns the available geometry of the screen with index <em>screen</em>. What
is available will be subrect of <a href="#screenGeometry">screenGeometry</a>() based on what the
platform decides is available (for example excludes the Dock and Menubar
on Mac OS X, or the taskbar on Windows).
<p> <p>See also <a href="#screenNumber">screenNumber</a>() and <a href="#screenGeometry">screenGeometry</a>().
<h3 class=fn>const <a href="qrect.html">QRect</a> & <a name="availableGeometry-2"></a>QDesktopWidget::availableGeometry ( <a href="qwidget.html">QWidget</a> * widget ) const
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Returns the available geometry of the screen which contains <em>widget</em>.
<p> <p>See also <a href="#screenGeometry">screenGeometry</a>().
<h3 class=fn>const <a href="qrect.html">QRect</a> & <a name="availableGeometry-3"></a>QDesktopWidget::availableGeometry ( const <a href="qpoint.html">QPoint</a> & p ) const
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Returns the available geometry of the screen which contains <em>p</em>.
<p> <p>See also <a href="#screenGeometry">screenGeometry</a>().
<h3 class=fn>bool <a name="isVirtualDesktop"></a>QDesktopWidget::isVirtualDesktop () const
</h3>
Returns TRUE if the system manages the available screens in a
virtual desktop; otherwise returns FALSE.
<p> For virtual desktops, <a href="#screen">screen</a>() will always return the same widget.
The size of the virtual desktop is the size of this desktop
widget.
<h3 class=fn>int <a name="numScreens"></a>QDesktopWidget::numScreens () const
</h3>
Returns the number of available screens.
<p> <p>See also <a href="#primaryScreen">primaryScreen</a>().
<h3 class=fn>int <a name="primaryScreen"></a>QDesktopWidget::primaryScreen () const
</h3>
Returns the index of the primary screen.
<p> <p>See also <a href="#numScreens">numScreens</a>().
<h3 class=fn>void <a name="resized"></a>QDesktopWidget::resized ( int screen )<tt> [signal]</tt>
</h3>
This signal is emitted when the size of <em>screen</em> changes.
<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="screen"></a>QDesktopWidget::screen ( int screen = -1 )
</h3>
Returns a widget that represents the screen with index <em>screen</em>.
This widget can be used to draw directly on the desktop, using an
unclipped painter like this:
<p> <pre>
<a href="qpainter.html">QPainter</a> paint( QApplication::<a href="qapplication.html#desktop">desktop</a>()->screen( 0 ), TRUE );
paint.draw...
...
paint.<a href="qpainter.html#end">end</a>();
</pre>
<p> If the system uses a virtual desktop, the returned widget will
have the geometry of the entire virtual desktop i.e. bounding
every <em>screen</em>.
<p> <p>See also <a href="#primaryScreen">primaryScreen</a>(), <a href="#numScreens">numScreens</a>(), and <a href="#isVirtualDesktop">isVirtualDesktop</a>().
<h3 class=fn>const <a href="qrect.html">QRect</a> & <a name="screenGeometry"></a>QDesktopWidget::screenGeometry ( int screen = -1 ) const
</h3>
Returns the geometry of the screen with index <em>screen</em>.
<p> <p>See also <a href="#screenNumber">screenNumber</a>().
<h3 class=fn>const <a href="qrect.html">QRect</a> & <a name="screenGeometry-2"></a>QDesktopWidget::screenGeometry ( <a href="qwidget.html">QWidget</a> * widget ) const
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Returns the geometry of the screen which contains <em>widget</em>.
<h3 class=fn>const <a href="qrect.html">QRect</a> & <a name="screenGeometry-3"></a>QDesktopWidget::screenGeometry ( const <a href="qpoint.html">QPoint</a> & p ) const
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Returns the geometry of the screen which contains <em>p</em>.
<h3 class=fn>int <a name="screenNumber"></a>QDesktopWidget::screenNumber ( <a href="qwidget.html">QWidget</a> * widget = 0 ) const
</h3>
Returns the index of the screen that contains the largest
part of <em>widget</em>, or -1 if the widget not on a screen.
<p> <p>See also <a href="#primaryScreen">primaryScreen</a>().
<h3 class=fn>int <a name="screenNumber-2"></a>QDesktopWidget::screenNumber ( const <a href="qpoint.html">QPoint</a> & point ) const
</h3>
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Returns the index of the screen that contains <em>point</em>, or -1 if
no screen contains the point.
<p> <p>See also <a href="#primaryScreen">primaryScreen</a>().
<!-- eof -->
<hr><p>
This file is part of the <a href="index.html">Qt toolkit</a>.
Copyright © 1995-2007
<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 © 2007
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
<td align=right><div align=right>Qt 3.3.8</div>
</table></div></address></body>
</html>
|