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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qtgui.html">QtGui</a></li> <li>QIconEngineV2</li> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-types">Public Types</a></li> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <h1 class="title">QIconEngineV2 Class Reference</h1> <!-- $$$QIconEngineV2-brief --> <p>The QIconEngineV2 class provides an abstract base class for <a href="qicon.html">QIcon</a> renderers. <a href="#details">More...</a></p> <!-- @@@QIconEngineV2 --> <pre class="cpp"> <span class="preprocessor">#include <QIconEngineV2></span></pre><p><b>Inherits: </b><a href="qiconengine.html">QIconEngine</a>.</p> <p>This class was introduced in Qt 4.3.</p> <ul> <li><a href="qiconenginev2-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-types"></a> <h2>Public Types</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> class </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2-availablesizesargument.html">AvailableSizesArgument</a></b></td></tr> <tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2.html#IconEngineHook-enum">IconEngineHook</a></b> { AvailableSizesHook, IconNameHook }</td></tr> </table> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> QList<QSize> </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2.html#availableSizes">availableSizes</a></b> ( QIcon::Mode <i>mode</i> = QIcon::Normal, QIcon::State <i>state</i> = QIcon::Off )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QIconEngineV2 * </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2.html#clone">clone</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2.html#iconName">iconName</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QString </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2.html#key">key</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2.html#read">read</a></b> ( QDataStream & <i>in</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2.html#virtual_hook">virtual_hook</a></b> ( int <i>id</i>, void * <i>data</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qiconenginev2.html#write">write</a></b> ( QDataStream & <i>out</i> ) const</td></tr> </table> <ul> <li class="fn">5 public functions inherited from <a href="qiconengine.html#public-functions">QIconEngine</a></li> </ul> <a name="details"></a> <!-- $$$QIconEngineV2-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The QIconEngineV2 class provides an abstract base class for <a href="qicon.html">QIcon</a> renderers.</p> <p>An icon engine renders <a href="qicon.html">QIcon</a>s. With icon engines, you can customize icons. Qt provides a default engine that makes icons adhere to the current style by scaling the icons and providing a disabled appearance.</p> <p>An engine is installed on an icon either through a <a href="qicon.html">QIcon</a> constructor or through a <a href="qiconenginepluginv2.html">QIconEnginePluginV2</a>. The plugins are used by Qt if a specific engine is not given when the icon is created. See the QIconEngineV2 class description to learn how to create icon engine plugins.</p> <p>An icon engine provides the rendering functions for a <a href="qicon.html">QIcon</a>. Each icon has a corresponding icon engine that is responsible for drawing the icon with a requested size, mode and state.</p> <p>QIconEngineV2 extends the API of <a href="qiconengine.html">QIconEngine</a> to allow streaming of the icon engine contents, and should be used instead of <a href="qiconengine.html">QIconEngine</a> for implementing new icon engines.</p> </div> <p><b>See also </b><a href="qiconenginepluginv2.html">QIconEnginePluginV2</a>.</p> <!-- @@@QIconEngineV2 --> <div class="types"> <h2>Member Type Documentation</h2> <!-- $$$IconEngineHook$$$AvailableSizesHook$$$IconNameHook --> <h3 class="fn"><a name="IconEngineHook-enum"></a>enum QIconEngineV2::<span class="name">IconEngineHook</span></h3> <p>These enum values are used for <a href="qiconenginev2.html#virtual_hook">virtual_hook</a>() to allow additional queries to icon engine without breaking binary compatibility.</p> <table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr> <tr><td class="topAlign"><tt>QIconEngineV2::AvailableSizesHook</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">Allows to query the sizes of the contained pixmaps for pixmap-based engines. The <i>data</i> argument of the <a href="qiconenginev2.html#virtual_hook">virtual_hook</a>() function is a <a href="qiconenginev2-availablesizesargument.html">AvailableSizesArgument</a> pointer that should be filled with icon sizes. Engines that work in terms of a scalable, vectorial format normally return an empty list.</td></tr> <tr><td class="topAlign"><tt>QIconEngineV2::IconNameHook</tt></td><td class="topAlign"><tt>2</tt></td><td class="topAlign">Allows to query the name used to create the icon, for example when instantiating an icon using <a href="qicon.html#fromTheme">QIcon::fromTheme</a>().</td></tr> </table> <p>This enum was introduced or modified in Qt 4.5.</p> <p><b>See also </b><a href="qiconenginev2.html#virtual_hook">virtual_hook</a>().</p> <!-- @@@IconEngineHook --> </div> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$availableSizes[overload1]$$$availableSizesQIcon::ModeQIcon::State --> <h3 class="fn"><a name="availableSizes"></a><span class="type"><a href="qlist.html">QList</a></span><<span class="type"><a href="qsize.html">QSize</a></span>> QIconEngineV2::<span class="name">availableSizes</span> ( <span class="type"><a href="qicon.html#Mode-enum">QIcon::Mode</a></span> <i>mode</i> = QIcon::Normal, <span class="type"><a href="qicon.html#State-enum">QIcon::State</a></span> <i>state</i> = QIcon::Off )</h3> <p>Returns sizes of all images that are contained in the engine for the specific <i>mode</i> and <i>state</i>.</p> <p><b>Note:</b> This is a helper method and the actual work is done by <a href="qiconenginev2.html#virtual_hook">virtual_hook</a>() method, hence this method depends on icon engine support and may not work with all icon engines.</p> <p>This function was introduced in Qt 4.5.</p> <!-- @@@availableSizes --> <!-- $$$clone[overload1]$$$clone --> <h3 class="fn"><a name="clone"></a><span class="type">QIconEngineV2</span> * QIconEngineV2::<span class="name">clone</span> () const<tt> [virtual]</tt></h3> <p>Returns a clone of this icon engine.</p> <!-- @@@clone --> <!-- $$$iconName[overload1]$$$iconName --> <h3 class="fn"><a name="iconName"></a><span class="type"><a href="qstring.html">QString</a></span> QIconEngineV2::<span class="name">iconName</span> ()</h3> <p>Returns the name used to create the engine, if available.</p> <p><b>Note:</b> This is a helper method and the actual work is done by <a href="qiconenginev2.html#virtual_hook">virtual_hook</a>() method, hence this method depends on icon engine support and may not work with all icon engines.</p> <p>This function was introduced in Qt 4.7.</p> <!-- @@@iconName --> <!-- $$$key[overload1]$$$key --> <h3 class="fn"><a name="key"></a><span class="type"><a href="qstring.html">QString</a></span> QIconEngineV2::<span class="name">key</span> () const<tt> [virtual]</tt></h3> <p>Returns a key that identifies this icon engine.</p> <!-- @@@key --> <!-- $$$read[overload1]$$$readQDataStream& --> <h3 class="fn"><a name="read"></a><span class="type">bool</span> QIconEngineV2::<span class="name">read</span> ( <span class="type"><a href="qdatastream.html">QDataStream</a></span> & <i>in</i> )<tt> [virtual]</tt></h3> <p>Reads icon engine contents from the <a href="qdatastream.html">QDataStream</a> <i>in</i>. Returns true if the contents were read; otherwise returns false.</p> <p><a href="qiconenginev2.html">QIconEngineV2</a>'s default implementation always return false.</p> <!-- @@@read --> <!-- $$$virtual_hook[overload1]$$$virtual_hookintvoid* --> <h3 class="fn"><a name="virtual_hook"></a><span class="type">void</span> QIconEngineV2::<span class="name">virtual_hook</span> ( <span class="type">int</span> <i>id</i>, <span class="type">void</span> * <i>data</i> )<tt> [virtual]</tt></h3> <p>Additional method to allow extending <a href="qiconenginev2.html">QIconEngineV2</a> without adding new virtual methods (and without breaking binary compatibility). The actual action and format of <i>data</i> depends on <i>id</i> argument which is in fact a constant from <a href="qiconenginev2.html#IconEngineHook-enum">IconEngineHook</a> enum.</p> <p>This function was introduced in Qt 4.5.</p> <p><b>See also </b><a href="qiconenginev2.html#IconEngineHook-enum">IconEngineHook</a>.</p> <!-- @@@virtual_hook --> <!-- $$$write[overload1]$$$writeQDataStream& --> <h3 class="fn"><a name="write"></a><span class="type">bool</span> QIconEngineV2::<span class="name">write</span> ( <span class="type"><a href="qdatastream.html">QDataStream</a></span> & <i>out</i> ) const<tt> [virtual]</tt></h3> <p>Writes the contents of this engine to the <a href="qdatastream.html">QDataStream</a> <i>out</i>. Returns true if the contents were written; otherwise returns false.</p> <p><a href="qiconenginev2.html">QIconEngineV2</a>'s default implementation always return false.</p> <!-- @@@write --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Qt and respective logos are trademarks of The Qt Company Ltd in Finland and/or other countries worldwide. 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