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194 lines
9.8 KiB
194 lines
9.8 KiB
14 years ago
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/widgets/qwidgetstack.cpp:97 -->
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<title>QWidgetStack Class</title>
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<td valign=center>
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Functions</font></a>
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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>QWidgetStack Class Reference</h1>
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<p>The QWidgetStack class provides a stack of widgets of which
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only the top widget is user-visible.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qwidgetstack-h.html">qwidgetstack.h</a>></tt>
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<p>Inherits <a href="qframe.html">QFrame</a>.
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<p><a href="qwidgetstack-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="#QWidgetStack"><b>QWidgetStack</b></a> ( QWidget * parent = 0, const char * name = 0 )</li>
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<li class=fn><a href="#QWidgetStack-2"><b>QWidgetStack</b></a> ( QWidget * parent, const char * name, WFlags f )</li>
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<li class=fn><a href="#~QWidgetStack"><b>~QWidgetStack</b></a> ()</li>
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<li class=fn>int <a href="#addWidget"><b>addWidget</b></a> ( QWidget * w, int id = -1 )</li>
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<li class=fn>void <a href="#removeWidget"><b>removeWidget</b></a> ( QWidget * w )</li>
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<li class=fn>QWidget * <a href="#widget"><b>widget</b></a> ( int id ) const</li>
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<li class=fn>int <a href="#id"><b>id</b></a> ( QWidget * widget ) const</li>
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<li class=fn>QWidget * <a href="#visibleWidget"><b>visibleWidget</b></a> () const</li>
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</ul>
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<h2>Public Slots</h2>
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<ul>
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<li class=fn>void <a href="#raiseWidget"><b>raiseWidget</b></a> ( int id )</li>
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<li class=fn>void <a href="#raiseWidget-2"><b>raiseWidget</b></a> ( QWidget * w )</li>
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</ul>
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<h2>Signals</h2>
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<ul>
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<li class=fn>void <a href="#aboutToShow"><b>aboutToShow</b></a> ( int )</li>
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<li class=fn>void <a href="#aboutToShow-2"><b>aboutToShow</b></a> ( QWidget * )</li>
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</ul>
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<h2>Protected Members</h2>
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<ul>
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<li class=fn>virtual void <a href="#setChildGeometries"><b>setChildGeometries</b></a> ()</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The QWidgetStack class provides a stack of widgets of which
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only the top widget is user-visible.
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<p>
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<p> The application programmer can move any widget to the top of the
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stack at any time using <a href="#raiseWidget">raiseWidget</a>(), and add or remove widgets
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using <a href="#addWidget">addWidget</a>() and <a href="#removeWidget">removeWidget</a>(). It is not sufficient to pass
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the widget stack as parent to a widget which should be inserted into
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the widgetstack.
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<p> <a href="#visibleWidget">visibleWidget</a>() is the <em>get</em> equivalent of raiseWidget(); it
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returns a pointer to the widget that is currently at the top of
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the stack.
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<p> QWidgetStack also provides the ability to manipulate widgets
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through application-specified integer IDs. You can also translate
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from widget pointers to IDs using <a href="#id">id</a>() and from IDs to widget
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pointers using <a href="#widget">widget</a>(). These numeric IDs are unique (per
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QWidgetStack, not globally), but QWidgetStack does not attach any
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additional meaning to them.
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<p> The default widget stack is frameless, but you can use the usual
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<a href="qframe.html">QFrame</a> functions (such as <a href="qframe.html#setFrameStyle">setFrameStyle</a>()) to add a frame.
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<p> QWidgetStack provides a signal, <a href="#aboutToShow">aboutToShow</a>(), which is emitted
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just before a managed widget is shown.
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<p> <p>See also <a href="qtabdialog.html">QTabDialog</a>, <a href="qtabbar.html">QTabBar</a>, <a href="qframe.html">QFrame</a>, and <a href="organizers.html">Organizers</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="QWidgetStack"></a>QWidgetStack::QWidgetStack ( <a href="qwidget.html">QWidget</a> * parent = 0, const char * name = 0 )
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</h3>
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Constructs an empty widget stack.
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<p> The <em>parent</em> and <em>name</em> arguments are passed to the <a href="qframe.html">QFrame</a>
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constructor.
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<h3 class=fn><a name="QWidgetStack-2"></a>QWidgetStack::QWidgetStack ( <a href="qwidget.html">QWidget</a> * parent, const char * name, WFlags f )
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</h3>
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Constructs an empty widget stack.
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<p> The <em>parent</em>, <em>name</em> and <em>f</em> arguments are passed to the <a href="qframe.html">QFrame</a>
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constructor.
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<h3 class=fn><a name="~QWidgetStack"></a>QWidgetStack::~QWidgetStack ()
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</h3>
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Destroys the object and frees any allocated resources.
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<h3 class=fn>void <a name="aboutToShow"></a>QWidgetStack::aboutToShow ( int )<tt> [signal]</tt>
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</h3>
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<p> This signal is emitted just before a managed widget is shown if
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that managed widget has an ID != -1. The argument is the numeric
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ID of the widget.
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<p> If you call <a href="#visibleWidget">visibleWidget</a>() in a slot connected to <a href="#aboutToShow">aboutToShow</a>(),
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the widget it returns is the one that is currently visible, not
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the one that is about to be shown.
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<h3 class=fn>void <a name="aboutToShow-2"></a>QWidgetStack::aboutToShow ( <a href="qwidget.html">QWidget</a> * )<tt> [signal]</tt>
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</h3>
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<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> This signal is emitted just before a managed widget is shown. The
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argument is a pointer to the widget.
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<p> If you call <a href="#visibleWidget">visibleWidget</a>() in a slot connected to <a href="#aboutToShow">aboutToShow</a>(),
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the widget returned is the one that is currently visible, not the
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one that is about to be shown.
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<h3 class=fn>int <a name="addWidget"></a>QWidgetStack::addWidget ( <a href="qwidget.html">QWidget</a> * w, int id = -1 )
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</h3>
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Adds widget <em>w</em> to this stack of widgets, with ID <em>id</em>.
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<p> If you pass an id >= 0 this ID is used. If you pass an <em>id</em> of
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-1 (the default), the widgets will be numbered automatically. If
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you pass -2 a unique negative integer will be generated. No widget
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has an ID of -1. Returns the ID or -1 on failure (e.g. <em>w</em> is 0).
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<p> If you pass an id that is already used, then a unique negative
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integer will be generated to prevent two widgets having the same
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id.
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<p> If <em>w</em> already exists in the stack the widget will be removed first.
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<p> If <em>w</em> is not a child of this QWidgetStack moves it using
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<a href="qwidget.html#reparent">reparent</a>().
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<p>Example: <a href="xform-example.html#x1276">xform/xform.cpp</a>.
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<h3 class=fn>int <a name="id"></a>QWidgetStack::id ( <a href="qwidget.html">QWidget</a> * widget ) const
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</h3>
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Returns the ID of the <em>widget</em>. Returns -1 if <em>widget</em> is 0 or
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is not being managed by this widget stack.
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<p> <p>See also <a href="#widget">widget</a>() and <a href="#addWidget">addWidget</a>().
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<h3 class=fn>void <a name="raiseWidget"></a>QWidgetStack::raiseWidget ( int id )<tt> [slot]</tt>
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</h3>
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Raises the widget with ID <em>id</em> to the top of the widget stack.
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<p> <p>See also <a href="#visibleWidget">visibleWidget</a>().
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<p>Example: <a href="xform-example.html#x1277">xform/xform.cpp</a>.
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<h3 class=fn>void <a name="raiseWidget-2"></a>QWidgetStack::raiseWidget ( <a href="qwidget.html">QWidget</a> * w )<tt> [slot]</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> Raises widget <em>w</em> to the top of the widget stack.
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<h3 class=fn>void <a name="removeWidget"></a>QWidgetStack::removeWidget ( <a href="qwidget.html">QWidget</a> * w )
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</h3>
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Removes widget <em>w</em> from this stack of widgets. Does not delete <em>w</em>. If <em>w</em> is the currently visible widget, no other widget is
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substituted.
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<p> <p>See also <a href="#visibleWidget">visibleWidget</a>() and <a href="#raiseWidget">raiseWidget</a>().
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<h3 class=fn>void <a name="setChildGeometries"></a>QWidgetStack::setChildGeometries ()<tt> [virtual protected]</tt>
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</h3>
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Fixes up the children's geometries.
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<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="visibleWidget"></a>QWidgetStack::visibleWidget () const
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</h3>
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Returns the currently visible widget (the one at the top of the
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stack), or 0 if nothing is currently being shown.
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<p> <p>See also <a href="#aboutToShow">aboutToShow</a>(), <a href="#id">id</a>(), and <a href="#raiseWidget">raiseWidget</a>().
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<h3 class=fn><a href="qwidget.html">QWidget</a> * <a name="widget"></a>QWidgetStack::widget ( int id ) const
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</h3>
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Returns the widget with ID <em>id</em>. Returns 0 if this widget stack
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does not manage a widget with ID <em>id</em>.
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<p> <p>See also <a href="#id">id</a>() and <a href="#addWidget">addWidget</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">Qt 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>Qt 3.3.8</div>
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</table></div></address></body>
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