341 lines
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341 lines
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<h1 class="title">QGraphicsSvgItem Class Reference</h1>
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<!-- $$$QGraphicsSvgItem-brief -->
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<p>The QGraphicsSvgItem class is a <a href="qgraphicsitem.html">QGraphicsItem</a> that can be used to render the contents of SVG files. <a href="#details">More...</a></p>
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<!-- @@@QGraphicsSvgItem -->
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<pre class="cpp"> <span class="preprocessor">#include <QGraphicsSvgItem></span></pre><p><b>Inherits: </b><a href="qgraphicsobject.html">QGraphicsObject</a>.</p>
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<p>This class was introduced in Qt 4.2.</p>
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<ul>
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<li><a href="qgraphicssvgitem-members.html">List of all members, including inherited members</a></li>
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<a name="properties"></a>
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<h2>Properties</h2>
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<ul>
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<li class="fn"><b><a href="qgraphicssvgitem.html#elementId-prop">elementId</a></b> : QString</li>
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<li class="fn"><b><a href="qgraphicssvgitem.html#maximumCacheSize-prop">maximumCacheSize</a></b> : QSize</li>
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</ul>
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<ul>
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<li class="fn">12 properties inherited from <a href="qgraphicsobject.html#properties">QGraphicsObject</a></li>
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<li class="fn">1 property inherited from <a href="qobject.html#properties">QObject</a></li>
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<a name="public-functions"></a>
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<h2>Public Functions</h2>
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<table class="alignedsummary">
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#QGraphicsSvgItem">QGraphicsSvgItem</a></b> ( QGraphicsItem * <i>parent</i> = 0 )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#QGraphicsSvgItem-2">QGraphicsSvgItem</a></b> ( const QString & <i>fileName</i>, QGraphicsItem * <i>parent</i> = 0 )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#elementId-prop">elementId</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QSize </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#maximumCacheSize-prop">maximumCacheSize</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QSvgRenderer * </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#renderer">renderer</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#elementId-prop">setElementId</a></b> ( const QString & <i>id</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#maximumCacheSize-prop">setMaximumCacheSize</a></b> ( const QSize & <i>size</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#setSharedRenderer">setSharedRenderer</a></b> ( QSvgRenderer * <i>renderer</i> )</td></tr>
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</table>
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<a name="reimplemented-public-functions"></a>
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<h2>Reimplemented Public Functions</h2>
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<table class="alignedsummary">
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<tr><td class="memItemLeft rightAlign topAlign"> virtual QRectF </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#boundingRect">boundingRect</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#paint">paint</a></b> ( QPainter * <i>painter</i>, const QStyleOptionGraphicsItem * <i>option</i>, QWidget * <i>widget</i> = 0 )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qgraphicssvgitem.html#type">type</a></b> () const</td></tr>
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</table>
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<ul>
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<li class="fn">2 public functions inherited from <a href="qgraphicsobject.html#public-functions">QGraphicsObject</a></li>
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<li class="fn">29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
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<li class="fn">177 public functions inherited from <a href="qgraphicsitem.html#public-functions">QGraphicsItem</a></li>
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</ul>
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<h3>Additional Inherited Members</h3>
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<ul>
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<li class="fn">1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li>
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<li class="fn">9 signals inherited from <a href="qgraphicsobject.html#signals">QGraphicsObject</a></li>
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<li class="fn">1 signal inherited from <a href="qobject.html#signals">QObject</a></li>
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<li class="fn">7 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
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<li class="fn">2 static public members inherited from <a href="qgraphicsitem.html#static-public-members">QGraphicsItem</a></li>
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<li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
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<li class="fn">24 protected functions inherited from <a href="qgraphicsitem.html#protected-functions">QGraphicsItem</a></li>
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<li class="fn">1 protected slot inherited from <a href="qgraphicsobject.html#protected-slots">QGraphicsObject</a></li>
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</ul>
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<a name="details"></a>
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<!-- $$$QGraphicsSvgItem-description -->
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<div class="descr">
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<h2>Detailed Description</h2>
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<p>The QGraphicsSvgItem class is a <a href="qgraphicsitem.html">QGraphicsItem</a> that can be used to render the contents of SVG files.</p>
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<p>QGraphicsSvgItem provides a way of rendering SVG files onto <a href="qgraphicsview.html">QGraphicsView</a>. QGraphicsSvgItem can be created by passing the SVG file to be rendered to its constructor or by explicit setting a shared <a href="qsvgrenderer.html">QSvgRenderer</a> on it.</p>
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<p>Note that setting <a href="qsvgrenderer.html">QSvgRenderer</a> on a QGraphicsSvgItem doesn't make the item take ownership of the renderer, therefore if using <a href="qgraphicssvgitem.html#setSharedRenderer">setSharedRenderer</a>() method one has to make sure that the lifetime of the <a href="qsvgrenderer.html">QSvgRenderer</a> object will be at least as long as that of the QGraphicsSvgItem.</p>
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<p>QGraphicsSvgItem provides a way of rendering only parts of the SVG files via the setElementId. If <a href="qgraphicssvgitem.html#elementId-prop">setElementId</a>() method is called, only the SVG element (and its children) with the passed id will be renderer. This provides a convenient way of selectively rendering large SVG files that contain a number of discrete elements. For example the following code renders only jokers from a SVG file containing a whole card deck:</p>
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<pre class="cpp"> <span class="type"><a href="qsvgrenderer.html">QSvgRenderer</a></span> <span class="operator">*</span>renderer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsvgrenderer.html">QSvgRenderer</a></span>(QLatin1String(<span class="string">"SvgCardDeck.svg"</span>));
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<span class="type">QGraphicsSvgItem</span> <span class="operator">*</span>black <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QGraphicsSvgItem</span>();
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<span class="type">QGraphicsSvgItem</span> <span class="operator">*</span>red <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QGraphicsSvgItem</span>();
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black<span class="operator">-</span><span class="operator">></span><a href="qgraphicssvgitem.html#setSharedRenderer">setSharedRenderer</a>(renderer);
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black<span class="operator">-</span><span class="operator">></span><a href="qgraphicssvgitem.html#elementId-prop">setElementId</a>(QLatin1String(<span class="string">"black_joker"</span>));
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red<span class="operator">-</span><span class="operator">></span><a href="qgraphicssvgitem.html#setSharedRenderer">setSharedRenderer</a>(renderer);
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red<span class="operator">-</span><span class="operator">></span><a href="qgraphicssvgitem.html#elementId-prop">setElementId</a>(QLatin1String(<span class="string">"red_joker"</span>));</pre>
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<p>Size of the item can be set via the <a href="qrectf.html#setSize">setSize()</a> method of the <a href="qgraphicssvgitem.html#boundingRect">bounding rectangle</a> or via direct manipulation of the items transformation matrix.</p>
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<p>By default the SVG rendering is cached using <a href="qgraphicsitem.html#CacheMode-enum">QGraphicsItem::DeviceCoordinateCache</a> mode to speedup the display of items. Caching can be disabled by passing <a href="qgraphicsitem.html#CacheMode-enum">QGraphicsItem::NoCache</a> to the <a href="qgraphicsitem.html#setCacheMode">QGraphicsItem::setCacheMode</a>() method.</p>
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</div>
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<p><b>See also </b><a href="qsvgwidget.html">QSvgWidget</a>, <a href="qtsvg.html">QtSvg Module</a>, <a href="qgraphicsitem.html">QGraphicsItem</a>, and <a href="qgraphicsview.html">QGraphicsView</a>.</p>
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<!-- @@@QGraphicsSvgItem -->
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<div class="prop">
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<h2>Property Documentation</h2>
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<!-- $$$elementId-prop$$$elementId$$$setElementIdconstQString& -->
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<h3 class="fn"><a name="elementId-prop"></a><span class="name">elementId</span> : <span class="type"><a href="qstring.html">QString</a></span></h3>
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<p>This property holds the element's XML ID.</p>
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<p>This property was introduced in Qt 4.6.</p>
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<p><b>Access functions:</b></p>
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<table class="alignedsummary">
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<tr><td class="memItemLeft topAlign rightAlign"> QString </td><td class="memItemRight bottomAlign"><span class="name"><b>elementId</b></span> () const</td></tr>
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<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setElementId</b></span> ( const QString & <i>id</i> )</td></tr>
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</table>
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<!-- @@@elementId -->
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<!-- $$$maximumCacheSize-prop$$$maximumCacheSize$$$setMaximumCacheSizeconstQSize& -->
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<h3 class="fn"><a name="maximumCacheSize-prop"></a><span class="name">maximumCacheSize</span> : <span class="type"><a href="qsize.html">QSize</a></span></h3>
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<p>This property holds the maximum size of the device coordinate cache for this item.</p>
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<p>This property was introduced in Qt 4.6.</p>
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<p><b>Access functions:</b></p>
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<table class="alignedsummary">
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<tr><td class="memItemLeft topAlign rightAlign"> QSize </td><td class="memItemRight bottomAlign"><span class="name"><b>maximumCacheSize</b></span> () const</td></tr>
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<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setMaximumCacheSize</b></span> ( const QSize & <i>size</i> )</td></tr>
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</table>
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<!-- @@@maximumCacheSize -->
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</div>
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<div class="func">
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<h2>Member Function Documentation</h2>
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<!-- $$$QGraphicsSvgItem[overload1]$$$QGraphicsSvgItemQGraphicsItem* -->
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<h3 class="fn"><a name="QGraphicsSvgItem"></a>QGraphicsSvgItem::<span class="name">QGraphicsSvgItem</span> ( <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> * <i>parent</i> = 0 )</h3>
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<p>Constructs a new SVG item with the given <i>parent</i>.</p>
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<!-- @@@QGraphicsSvgItem -->
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<!-- $$$QGraphicsSvgItem$$$QGraphicsSvgItemconstQString&QGraphicsItem* -->
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<h3 class="fn"><a name="QGraphicsSvgItem-2"></a>QGraphicsSvgItem::<span class="name">QGraphicsSvgItem</span> ( const <span class="type"><a href="qstring.html">QString</a></span> & <i>fileName</i>, <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> * <i>parent</i> = 0 )</h3>
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<p>Constructs a new item with the given <i>parent</i> and loads the contents of the SVG file with the specified <i>fileName</i>.</p>
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<!-- @@@QGraphicsSvgItem -->
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<!-- $$$boundingRect[overload1]$$$boundingRect -->
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<h3 class="fn"><a name="boundingRect"></a><span class="type"><a href="qrectf.html">QRectF</a></span> QGraphicsSvgItem::<span class="name">boundingRect</span> () const<tt> [virtual]</tt></h3>
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<p>Reimplemented from <a href="qgraphicsitem.html#boundingRect">QGraphicsItem::boundingRect</a>().</p>
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<p>Returns the bounding rectangle of this item.</p>
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<!-- @@@boundingRect -->
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<!-- $$$paint[overload1]$$$paintQPainter*constQStyleOptionGraphicsItem*QWidget* -->
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<h3 class="fn"><a name="paint"></a><span class="type">void</span> QGraphicsSvgItem::<span class="name">paint</span> ( <span class="type"><a href="qpainter.html">QPainter</a></span> * <i>painter</i>, const <span class="type"><a href="qstyleoptiongraphicsitem.html">QStyleOptionGraphicsItem</a></span> * <i>option</i>, <span class="type"><a href="qwidget.html">QWidget</a></span> * <i>widget</i> = 0 )<tt> [virtual]</tt></h3>
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<p>Reimplemented from <a href="qgraphicsitem.html#paint">QGraphicsItem::paint</a>().</p>
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<!-- @@@paint -->
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<!-- $$$renderer[overload1]$$$renderer -->
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<h3 class="fn"><a name="renderer"></a><span class="type"><a href="qsvgrenderer.html">QSvgRenderer</a></span> * QGraphicsSvgItem::<span class="name">renderer</span> () const</h3>
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<p>Returns the currently use <a href="qsvgrenderer.html">QSvgRenderer</a>.</p>
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<!-- @@@renderer -->
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<!-- $$$setSharedRenderer[overload1]$$$setSharedRendererQSvgRenderer* -->
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<h3 class="fn"><a name="setSharedRenderer"></a><span class="type">void</span> QGraphicsSvgItem::<span class="name">setSharedRenderer</span> ( <span class="type"><a href="qsvgrenderer.html">QSvgRenderer</a></span> * <i>renderer</i> )</h3>
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<p>Sets <i>renderer</i> to be a shared <a href="qsvgrenderer.html">QSvgRenderer</a> on the item. By using this method one can share the same <a href="qsvgrenderer.html">QSvgRenderer</a> on a number of items. This means that the SVG file will be parsed only once. <a href="qsvgrenderer.html">QSvgRenderer</a> passed to this method has to exist for as long as this item is used.</p>
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<!-- @@@setSharedRenderer -->
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<!-- $$$type[overload1]$$$type -->
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<h3 class="fn"><a name="type"></a><span class="type">int</span> QGraphicsSvgItem::<span class="name">type</span> () const<tt> [virtual]</tt></h3>
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<p>Reimplemented from <a href="qgraphicsitem.html#type">QGraphicsItem::type</a>().</p>
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<!-- @@@type -->
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