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<td >Qt 5.12</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-module.html">C++ Classes</a></td><td >QGraphicsBlurEffect</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.6 Reference Documentation</a></td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-types">Public Types</a></li>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#reimplemented-public-functions">Reimplemented Public Functions</a></li>
<li class="level1"><a href="#public-slots">Public Slots</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#static-public-members">Static Public Members</a></li>
<li class="level1"><a href="#reimplemented-protected-functions">Reimplemented Protected Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QGraphicsBlurEffect Class</h1>
<!-- $$$QGraphicsBlurEffect-brief -->
<p>The <a href="qgraphicsblureffect.html">QGraphicsBlurEffect</a> class provides a blur effect. <a href="#details">More...</a></p>
<!-- @@@QGraphicsBlurEffect -->
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QGraphicsBlurEffect></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += widgets</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 4.6</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="qgraphicseffect.html">QGraphicsEffect</a></td></tr></table></div><ul>
<li><a href="qgraphicsblureffect-members.html">List of all members, including inherited members</a></li>
<li><a href="qgraphicsblureffect-obsolete.html">Obsolete members</a></li>
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<a name="public-types"></a>
<h2 id="public-types">Public Types</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#BlurHint-enum">BlurHint</a></b> { PerformanceHint, QualityHint, AnimationHint }</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> flags </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#BlurHint-enum">BlurHints</a></b></td></tr>
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<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><a href="qgraphicsblureffect.html#blurHints-prop">blurHints</a></b> : BlurHints</li>
<li class="fn"><b><a href="qgraphicsblureffect.html#blurRadius-prop">blurRadius</a></b> : qreal</li>
</ul>
<ul>
<li class="fn">1 property inherited from <a href="qgraphicseffect.html#properties">QGraphicsEffect</a></li>
<li class="fn">1 property inherited from <a href="../qtcore/qobject.html#properties">QObject</a></li>
</ul>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#QGraphicsBlurEffect">QGraphicsBlurEffect</a></b>(QObject *<i>parent</i> = nullptr)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#dtor.QGraphicsBlurEffect">~QGraphicsBlurEffect</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QGraphicsBlurEffect::BlurHints </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#blurHints-prop">blurHints</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#blurRadius-prop">blurRadius</a></b>() const</td></tr>
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<a name="reimplemented-public-functions"></a>
<h2 id="reimplemented-public-functions">Reimplemented Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual QRectF </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#boundingRectFor">boundingRectFor</a></b>(const QRectF &<i>rect</i>) const override</td></tr>
</table></div>
<ul>
<li class="fn">3 public functions inherited from <a href="qgraphicseffect.html#public-functions">QGraphicsEffect</a></li>
<li class="fn">31 public functions inherited from <a href="../qtcore/qobject.html#public-functions">QObject</a></li>
</ul>
<a name="public-slots"></a>
<h2 id="public-slots">Public Slots</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#blurHints-prop">setBlurHints</a></b>(QGraphicsBlurEffect::BlurHints <i>hints</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#blurRadius-prop">setBlurRadius</a></b>(qreal <i>blurRadius</i>)</td></tr>
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<ul>
<li class="fn">2 public slots inherited from <a href="qgraphicseffect.html#public-slots">QGraphicsEffect</a></li>
<li class="fn">1 public slot inherited from <a href="../qtcore/qobject.html#public-slots">QObject</a></li>
</ul>
<a name="signals"></a>
<h2 id="signals">Signals</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#blurHintsChanged">blurHintsChanged</a></b>(QGraphicsBlurEffect::BlurHints <i>hints</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#blurRadiusChanged">blurRadiusChanged</a></b>(qreal <i>radius</i>)</td></tr>
</table></div>
<ul>
<li class="fn">1 signal inherited from <a href="qgraphicseffect.html#signals">QGraphicsEffect</a></li>
<li class="fn">2 signals inherited from <a href="../qtcore/qobject.html#signals">QObject</a></li>
</ul>
<a name="static-public-members"></a>
<h2 id="static-public-members">Static Public Members</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> const QMetaObject </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#staticMetaObject-var">staticMetaObject</a></b></td></tr>
</table></div>
<ul>
<li class="fn">9 static public members inherited from <a href="../qtcore/qobject.html#static-public-members">QObject</a></li>
</ul>
<a name="reimplemented-protected-functions"></a>
<h2 id="reimplemented-protected-functions">Reimplemented Protected Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsblureffect.html#draw">draw</a></b>(QPainter *<i>painter</i>) override</td></tr>
</table></div>
<ul>
<li class="fn">7 protected functions inherited from <a href="qgraphicseffect.html#protected-functions">QGraphicsEffect</a></li>
<li class="fn">9 protected functions inherited from <a href="../qtcore/qobject.html#protected-functions">QObject</a></li>
</ul>
<a name="details"></a>
<!-- $$$QGraphicsBlurEffect-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qgraphicsblureffect.html">QGraphicsBlurEffect</a> class provides a blur effect.</p>
<p>A blur effect blurs the source. This effect is useful for reducing details, such as when the source loses focus and you want to draw attention to other elements. The level of detail can be modified using the <a href="qgraphicsblureffect.html#blurRadius-prop">setBlurRadius</a>() function. Use <a href="qgraphicsblureffect.html#blurHints-prop">setBlurHints</a>() to choose the blur hints.</p>
<p>By default, the blur radius is 5 pixels. The blur radius is specified in device coordinates.</p>
<p class="centerAlign"><img src="images/graphicseffect-blur.png" alt="" /></p></div>
<p><b>See also </b><a href="qgraphicsdropshadoweffect.html">QGraphicsDropShadowEffect</a>, <a href="qgraphicscolorizeeffect.html">QGraphicsColorizeEffect</a>, and <a href="qgraphicsopacityeffect.html">QGraphicsOpacityEffect</a>.</p>
<!-- @@@QGraphicsBlurEffect -->
<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$BlurHint$$$PerformanceHint$$$QualityHint$$$AnimationHint -->
<h3 class="flags" id="BlurHint-enum"><a name="BlurHint-enum"></a>enum QGraphicsBlurEffect::<span class="name">BlurHint</span><br/>flags QGraphicsBlurEffect::<span class="name">BlurHints</span></h3>
<p>This enum describes the possible hints that can be used to control how blur effects are applied. The hints might not have an effect in all the paint engines.</p>
<div class="table"><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"><code>QGraphicsBlurEffect::PerformanceHint</code></td><td class="topAlign tblval"><code>0x00</code></td><td class="topAlign">Indicates that rendering performance is the most important factor, at the potential cost of lower quality.</td></tr>
<tr><td class="topAlign"><code>QGraphicsBlurEffect::QualityHint</code></td><td class="topAlign tblval"><code>0x01</code></td><td class="topAlign">Indicates that rendering quality is the most important factor, at the potential cost of lower performance.</td></tr>
<tr><td class="topAlign"><code>QGraphicsBlurEffect::AnimationHint</code></td><td class="topAlign tblval"><code>0x02</code></td><td class="topAlign">Indicates that the blur radius is going to be animated, hinting that the implementation can keep a cache of blurred verisons of the source. Do not use this hint if the source is going to be dynamically changing.</td></tr>
</table></div>
<p>This enum was introduced or modified in Qt 4.6.</p>
<p>The BlurHints type is a typedef for <a href="../qtcore/qflags.html">QFlags</a><BlurHint>. It stores an OR combination of BlurHint values.</p>
<p><b>See also </b><a href="qgraphicsblureffect.html#blurHints-prop">blurHints</a>() and <a href="qgraphicsblureffect.html#blurHints-prop">setBlurHints</a>().</p>
<!-- @@@BlurHint -->
</div>
<div class="prop">
<h2>Property Documentation</h2>
<!-- $$$blurHints-prop$$$blurHints$$$setBlurHintsQGraphicsBlurEffect::BlurHints$$$blurHintsChangedQGraphicsBlurEffect::BlurHints -->
<h3 class="fn" id="blurHints-prop"><a name="blurHints-prop"></a><span class="name">blurHints</span> : <span class="type"><a href="qgraphicsblureffect.html#BlurHint-enum">BlurHints</a></span></h3>
<p>This property holds the blur hint of the effect.</p>
<p>Use the <a href="qgraphicsblureffect.html#BlurHint-enum">PerformanceHint</a> hint to say that you want a faster blur, the <a href="qgraphicsblureffect.html#BlurHint-enum">QualityHint</a> hint to say that you prefer a higher quality blur, or the <a href="qgraphicsblureffect.html#BlurHint-enum">AnimationHint</a> when you want to animate the blur radius.</p>
<p>By default, the blur hint is <a href="qgraphicsblureffect.html#BlurHint-enum">PerformanceHint</a>.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QGraphicsBlurEffect::BlurHints </td><td class="memItemRight bottomAlign"><span class="name"><b>blurHints</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setBlurHints</b></span>(QGraphicsBlurEffect::BlurHints <i>hints</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="qgraphicsblureffect.html#blurHintsChanged">blurHintsChanged</a></b></span>(QGraphicsBlurEffect::BlurHints <i>hints</i>)</td></tr>
</table></div>
<!-- @@@blurHints -->
<!-- $$$blurRadius-prop$$$blurRadius$$$setBlurRadiusqreal$$$blurRadiusChangedqreal -->
<h3 class="fn" id="blurRadius-prop"><a name="blurRadius-prop"></a><span class="name">blurRadius</span> : <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span></h3>
<p>This property holds the blur radius of the effect.</p>
<p>Using a smaller radius results in a sharper appearance, whereas a bigger radius results in a more blurred appearance.</p>
<p>By default, the blur radius is 5 pixels.</p>
<p>The radius is given in device coordinates, meaning it is unaffected by scale.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><span class="name"><b>blurRadius</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setBlurRadius</b></span>(qreal <i>blurRadius</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="qgraphicsblureffect.html#blurRadiusChanged">blurRadiusChanged</a></b></span>(qreal <i>radius</i>)</td></tr>
</table></div>
<!-- @@@blurRadius -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QGraphicsBlurEffect[overload1]$$$QGraphicsBlurEffectQObject* -->
<h3 class="fn" id="QGraphicsBlurEffect"><a name="QGraphicsBlurEffect"></a>QGraphicsBlurEffect::<span class="name">QGraphicsBlurEffect</span>(<span class="type"><a href="../qtcore/qobject.html#QObject">QObject</a></span> *<i>parent</i> = nullptr)</h3>
<p>Constructs a new <a href="qgraphicsblureffect.html">QGraphicsBlurEffect</a> instance. The <i>parent</i> parameter is passed to <a href="qgraphicseffect.html">QGraphicsEffect</a>'s constructor.</p>
<!-- @@@QGraphicsBlurEffect -->
<!-- $$$~QGraphicsBlurEffect[overload1]$$$~QGraphicsBlurEffect -->
<h3 class="fn" id="dtor.QGraphicsBlurEffect"><a name="dtor.QGraphicsBlurEffect"></a><code>[virtual] </code>QGraphicsBlurEffect::<span class="name">~QGraphicsBlurEffect</span>()</h3>
<p>Destroys the effect.</p>
<!-- @@@~QGraphicsBlurEffect -->
<!-- $$$blurHintsChanged -->
<h3 class="fn" id="blurHintsChanged"><a name="blurHintsChanged"></a><code>[signal] </code><span class="type">void</span> QGraphicsBlurEffect::<span class="name">blurHintsChanged</span>(<span class="type"><a href="qgraphicsblureffect.html#BlurHint-enum">QGraphicsBlurEffect::BlurHints</a></span> <i>hints</i>)</h3>
<p>This signal is emitted whenever the effect's blur hints changes. The <i>hints</i> parameter holds the effect's new blur hints.</p>
<p><b>Note:</b> Notifier signal for property <a href="qgraphicsblureffect.html#blurHints-prop">blurHints</a>. </p><!-- @@@blurHintsChanged -->
<!-- $$$blurRadiusChanged -->
<h3 class="fn" id="blurRadiusChanged"><a name="blurRadiusChanged"></a><code>[signal] </code><span class="type">void</span> QGraphicsBlurEffect::<span class="name">blurRadiusChanged</span>(<span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> <i>radius</i>)</h3>
<p>This signal is emitted whenever the effect's blur radius changes. The <i>radius</i> parameter holds the effect's new blur radius.</p>
<p><b>Note:</b> Notifier signal for property <a href="qgraphicsblureffect.html#blurRadius-prop">blurRadius</a>. </p><!-- @@@blurRadiusChanged -->
<!-- $$$boundingRectFor[overload1]$$$boundingRectForconstQRectF& -->
<h3 class="fn" id="boundingRectFor"><a name="boundingRectFor"></a><code>[override virtual] </code><span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> QGraphicsBlurEffect::<span class="name">boundingRectFor</span>(const <span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span> &<i>rect</i>) const</h3>
<p>Reimplemented from <a href="qgraphicseffect.html#boundingRectFor">QGraphicsEffect::boundingRectFor</a>().</p>
<!-- @@@boundingRectFor -->
<!-- $$$draw[overload1]$$$drawQPainter* -->
<h3 class="fn" id="draw"><a name="draw"></a><code>[override virtual protected] </code><span class="type">void</span> QGraphicsBlurEffect::<span class="name">draw</span>(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> *<i>painter</i>)</h3>
<p>Reimplemented from <a href="qgraphicseffect.html#draw">QGraphicsEffect::draw</a>().</p>
<!-- @@@draw -->
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