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<td width="1"> </td><td class="postheader" 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="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td>
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<p><b>The following class members are part of the <a href="qt3support.html">Qt 3 support layer</a>.</b> They are provided to help you port old code to Qt 4. We advise against using them in new code.</p>
<p><ul><li><a href="qpaintevent.html">QPaintEvent class reference</a></li></ul></p>
<h3>Public Functions</h3>
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<li><div class="fn"/><b><a href="qpaintevent-qt3.html#QPaintEvent-3">QPaintEvent</a></b> ( const QRegion & <i>paintRegion</i>, const QRect & <i>paintRect</i> )</li>
<li><div class="fn"/>bool <b><a href="qpaintevent-qt3.html#erased">erased</a></b> () const</li>
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<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QPaintEvent-3"></a>QPaintEvent::QPaintEvent ( const <a href="qregion.html">QRegion</a> & <i>paintRegion</i>, const <a href="qrect.html">QRect</a> & <i>paintRect</i> )</h3>
<p>Constructs a paint event object with both a <i>paintRegion</i> and a <i>paintRect</i>, both of which represent the area of the widget that needs to be updated.</p>
<h3 class="fn"><a name="erased"></a>bool QPaintEvent::erased () const</h3>
<p>Returns true if the paint event region (or rectangle) has been erased with the widget's background; otherwise returns false.</p>
<p>Qt 4 <i>always</i> erases regions that require painting. The exception to this rule is if the widget sets the <a href="qt.html#WidgetAttribute-enum">Qt::WA_OpaquePaintEvent</a> or <a href="qt.html#WidgetAttribute-enum">Qt::WA_NoSystemBackground</a> attributes. If either one of those attributes is set <i>and</i> the window system does not make use of subwidget alpha composition (currently X11 and Windows, but this may change), then the region is not erased.</p>
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