<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <!-- /tmp/qt-4.2.1-harald-1161357942206/qt-x11-opensource-src-4.2.1/src/gui/styles/qstyleoption.cpp --> <head> <title>Qt 4.2: QStyleHintReturn Class Reference</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://www.trolltech.com/products/qt"><img src="images/qt-logo.png" align="left" width="32" height="32" border="0" /></a></td> <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> <td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">QStyleHintReturn Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1> <p>The QStyleHintReturn class provides style hints that return more than basic data types. <a href="#details">More...</a></p> <pre> #include <QStyleHintReturn></pre><p>Inherited by <a href="qstylehintreturnmask.html">QStyleHintReturnMask</a>.</p> <ul> <li><a href="qstylehintreturn-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-types"></a> <h3>Public Types</h3> <ul> <li><div class="fn"/>enum <b><a href="qstylehintreturn.html#HintReturnType-enum">HintReturnType</a></b> { SH_Default, SH_Mask }</li> <li><div class="fn"/>enum <b><a href="qstylehintreturn.html#StyleOptionType-enum">StyleOptionType</a></b> { Type }</li> <li><div class="fn"/>enum <b><a href="qstylehintreturn.html#StyleOptionVersion-enum">StyleOptionVersion</a></b> { Version }</li> </ul> <a name="public-functions"></a> <h3>Public Functions</h3> <ul> <li><div class="fn"/><b><a href="qstylehintreturn.html#QStyleHintReturn">QStyleHintReturn</a></b> ( int <i>version</i> = QStyleOption::Version, int <i>type</i> = SH_Default )</li> </ul> <a name="public-variables"></a> <h3>Public Variables</h3> <ul> <li><div class="fn"/>int <b><a href="qstylehintreturn.html#type-varx">type</a></b></li> <li><div class="fn"/>int <b><a href="qstylehintreturn.html#version-var">version</a></b></li> </ul> <a name="related-non-members"></a> <h3>Related Non-Members</h3> <ul> <li><div class="fn"/>T <b><a href="qstylehintreturn.html#qstyleoption_cast-2">qstyleoption_cast</a></b> ( const QStyleHintReturn * <i>hint</i> )</li> <li><div class="fn"/>T <b><a href="qstylehintreturn.html#qstyleoption_cast-4">qstyleoption_cast</a></b> ( QStyleHintReturn * <i>hint</i> )</li> </ul> <a name="details"></a> <hr /> <h2>Detailed Description</h2> <p>The QStyleHintReturn class provides style hints that return more than basic data types.</p> <p>QStyleHintReturn and its subclasses are used to pass information from a style back to the querying widget. This is most useful when the return value from <a href="qstyle.html#styleHint">QStyle::styleHint</a>() does not provide enough detail; for example, when a mask is to be returned.</p> <hr /> <h2>Member Type Documentation</h2> <h3 class="fn"><a name="HintReturnType-enum"></a>enum QStyleHintReturn::HintReturnType</h3> <p><table border="1" cellpadding="2" cellspacing="1" width="100%"> <tr><th width="25%">Constant</th><th width="15%">Value</th><th width="60%">Description</th></tr> <tr><td valign="top"><tt>QStyleHintReturn::SH_Default</tt></td><td align="center" valign="top"><tt>0xf000</tt></td><td valign="top"><a href="qstylehintreturn.html">QStyleHintReturn</a></td></tr> <tr><td valign="top"><tt>QStyleHintReturn::SH_Mask</tt></td><td align="center" valign="top"> </td><td valign="top"><a href="qstyle.html#StyleHint-enum">QStyle::SH_RubberBand_Mask</a> <a href="qstyle.html#StyleHint-enum">QStyle::SH_FocusFrame_Mask</a></td></tr> </table></p> <h3 class="fn"><a name="StyleOptionType-enum"></a>enum QStyleHintReturn::StyleOptionType</h3> <p>This enum is used to hold information about the type of the style option, and is defined for each <a href="qstylehintreturn.html">QStyleHintReturn</a> subclass.</p> <p><table border="1" cellpadding="2" cellspacing="1" width="100%"> <tr><th width="25%">Constant</th><th width="15%">Value</th><th width="60%">Description</th></tr> <tr><td valign="top"><tt>QStyleHintReturn::Type</tt></td><td align="center" valign="top"><tt>SH_Default</tt></td><td valign="top">The type of style option provided (<a href="qstylehintreturn.html#HintReturnType-enum">SH_Default</a> for this class).</td></tr> </table></p> <p>The type is used internally by <a href="qstylehintreturn.html">QStyleHintReturn</a>, its subclasses, and <a href="qstyleoption.html#qstyleoption_cast">qstyleoption_cast</a>() to determine the type of style option. In general you do not need to worry about this unless you want to create your own <a href="qstylehintreturn.html">QStyleHintReturn</a> subclass and your own styles.</p> <p>See also <a href="qstylehintreturn.html#StyleOptionVersion-enum">StyleOptionVersion</a>.</p> <h3 class="fn"><a name="StyleOptionVersion-enum"></a>enum QStyleHintReturn::StyleOptionVersion</h3> <p>This enum is used to hold information about the version of the style option, and is defined for each <a href="qstylehintreturn.html">QStyleHintReturn</a> subclass.</p> <p><table border="1" cellpadding="2" cellspacing="1" width="100%"> <tr><th width="25%">Constant</th><th width="15%">Value</th><th width="60%">Description</th></tr> <tr><td valign="top"><tt>QStyleHintReturn::Version</tt></td><td align="center" valign="top"><tt>1</tt></td><td valign="top">1</td></tr> </table></p> <p>The version is used by <a href="qstylehintreturn.html">QStyleHintReturn</a> subclasses to implement extensions without breaking compatibility. If you use <a href="qstyleoption.html#qstyleoption_cast">qstyleoption_cast</a>(), you normally don't need to check it.</p> <p>See also <a href="qstylehintreturn.html#StyleOptionType-enum">StyleOptionType</a>.</p> <hr /> <h2>Member Function Documentation</h2> <h3 class="fn"><a name="QStyleHintReturn"></a>QStyleHintReturn::QStyleHintReturn ( int <i>version</i> = QStyleOption::Version, int <i>type</i> = SH_Default )</h3> <p>Constructs a <a href="qstylehintreturn.html">QStyleHintReturn</a> with version <i>version</i> and type <i>type</i>.</p> <p>The version has no special meaning for <a href="qstylehintreturn.html">QStyleHintReturn</a>; it can be used by subclasses to distinguish between different version of the same hint type.</p> <p>See also <a href="qstyleoption.html#version-var">QStyleOption::version</a> and <a href="qstyleoption.html#type-varx">QStyleOption::type</a>.</p> <hr /> <h2>Member Variable Documentation</h2> <h3 class="fn"><a name="type-varx"></a>int QStyleHintReturn::type</h3> <p>This variable holds the type of the style hint container.</p> <p>See also <a href="qstylehintreturn.html#HintReturnType-enum">HintReturnType</a>.</p> <h3 class="fn"><a name="version-var"></a>int QStyleHintReturn::version</h3> <p>This variable holds the version of the style hint return container.</p> <p>This value can be used by subclasses to implement extensions without breaking compatibility. If you use qstyleoption_cast<T>(), you normally don't need to check it.</p> <hr /> <h2>Related Non-Members</h2> <h3 class="fn"><a name="qstyleoption_cast-2"></a>T qstyleoption_cast ( const QStyleHintReturn * <i>hint</i> )</h3> <p>This is an overloaded member function, provided for convenience.</p> <p>Returns a T or 0 depending on the <a href="qstylehintreturn.html#type-varx">type</a> and <a href="qstylehintreturn.html#version-var">version</a> of <i>hint</i>.</p> <p>Example:</p> <pre> int MyStyle::styleHint(StyleHint stylehint, const QStyleOption *opt, const QWidget *widget, QStyleHintReturn* returnData) const; { if (stylehint == SH_RubberBand_Mask) { const QStyleHintReturnMask *maskReturn = qstyleoption_cast<const QStyleHintReturnMask *>(hint); if (maskReturn) { ... } } ... }</pre> <p>See also <a href="qstylehintreturn.html#type-varx">QStyleHintReturn::type</a> and <a href="qstylehintreturn.html#version-var">QStyleHintReturn::version</a>.</p> <h3 class="fn"><a name="qstyleoption_cast-4"></a>T qstyleoption_cast ( QStyleHintReturn * <i>hint</i> )</h3> <p>This is an overloaded member function, provided for convenience.</p> <p>Returns a T or 0 depending on the type of <i>hint</i>.</p> <p /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="30%">Copyright © 2006 <a href="trolltech.html">Trolltech</a></td> <td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="30%" align="right"><div align="right">Qt 4.2.1</div></td> </tr></table></div></address></body> </html>