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<td >Qt 5.9</td><td ><a href="qtgraphicaleffects-index.html">Qt Graphical Effects</a></td><td ><a href="graphicaleffects.html">QML Types</a></td><td >ConicalGradient QML Type</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.5 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
<li class="level2"><a href="#example">Example</a></li>
</ul>
</div>
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<h1 class="title">ConicalGradient QML Type</h1>
<span class="subtitle"></span>
<!-- $$$ConicalGradient-brief -->
<p>Draws a conical gradient. <a href="#details">More...</a></p>
<!-- @@@ConicalGradient -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtGraphicalEffects 1.0</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> QtGraphicalEffects 1.0</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <p><a href="../qtquick/qml-qtquick-item.html">Item</a></p>
</td></tr></table></div><ul>
<li><a href="qml-qtgraphicaleffects-conicalgradient-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-conicalgradient.html#cached-prop">cached</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-conicalgradient.html#gradient-prop">gradient</a></b></b> : Gradient</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-conicalgradient.html#source-prop">source</a></b></b> : variant</li>
<li class="fn"><b><b><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a></b></b> : real</li>
</ul>
<!-- $$$ConicalGradient-description -->
<a name="details"></a>
<h2 id="details">Detailed Description</h2>
<p>A gradient is defined by two or more colors, which are blended seamlessly. The colors start from the specified angle and end at 360 degrees larger angle value.</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Effect applied</th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/ConicalGradient.png" alt="" /></p></td></tr>
</table></div>
<p><b>Note: </b>This effect is available when running with OpenGL.</p><a name="example"></a>
<h2 id="example">Example</h2>
<p>The following example shows how to apply the effect.</p>
<pre class="qml">
import QtQuick 2.0
import QtGraphicalEffects 1.0
<span class="type"><a href="../qtquick/qml-qtquick-item.html">Item</a></span> {
<span class="name">width</span>: <span class="number">300</span>
<span class="name">height</span>: <span class="number">300</span>
<span class="type"><a href="qml-qtgraphicaleffects-conicalgradient.html">ConicalGradient</a></span> {
<span class="name">anchors</span>.fill: <span class="name">parent</span>
<span class="name">angle</span>: <span class="number">0.0</span>
<span class="name">gradient</span>: <span class="name">Gradient</span> {
<span class="type"><a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">position</span>: <span class="number">0.0</span>; <span class="name">color</span>: <span class="string">"white"</span> }
<span class="type"><a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a></span> { <span class="name">position</span>: <span class="number">1.0</span>; <span class="name">color</span>: <span class="string">"black"</span> }
}
}
}
</pre>
<!-- @@@ConicalGradient -->
<h2>Property Documentation</h2>
<!-- $$$angle -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="angle-prop">
<td class="tblQmlPropNode"><p>
<a name="angle-prop"></a><span class="name">angle</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property defines the starting angle where the color at the gradient position of 0.0 is rendered. Colors at larger position values are rendered into larger angle values and blended seamlessly. Angle values increase clockwise.</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Output examples with different angle values</th><th ></th><th ></th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/ConicalGradient_angle1.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_angle2.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_angle3.png" alt="" /></p></td></tr>
<tr valign="top" class="even"><td ><b> angle: 0 </b></td><td ><b> angle: 45 </b></td><td ><b> angle: 185 </b></td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0</td></tr>
<tr valign="top" class="even"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td></tr>
</table></div>
</div></div><!-- @@@angle -->
<br/>
<!-- $$$cached -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="cached-prop">
<td class="tblQmlPropNode"><p>
<a name="cached-prop"></a><span class="name">cached</span> : <span class="type">bool</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property allows the effect output pixels to be cached in order to improve the rendering performance.</p>
<p>Every time the source or effect properties are changed, the pixels in the cache must be updated. Memory consumption is increased, because an extra buffer of memory is required for storing the effect output.</p>
<p>It is recommended to disable the cache when the source or the effect properties are animated.</p>
<p>By default, the property is set to <code>false</code>.</p>
</div></div><!-- @@@cached -->
<br/>
<!-- $$$gradient -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="gradient-prop">
<td class="tblQmlPropNode"><p>
<a name="gradient-prop"></a><span class="name">gradient</span> : <span class="type"><a href="../qtquick/qml-qtquick-gradient.html">Gradient</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>A gradient is defined by two or more colors, which are blended seamlessly. The colors are specified as a set of <a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a> child items, each of which defines a position on the gradient (from 0.0 to 1.0), and a color. The position of each <a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a> is defined by the position property. The color is defined by the color property.</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Output examples with different gradient values</th><th ></th><th ></th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/ConicalGradient_gradient1.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_gradient2.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_gradient3.png" alt="" /></p></td></tr>
<tr valign="top" class="even"><td ><b>gradient:</b><pre class="cpp">
Gradient {
GradientStop {
position: <span class="number">0.000</span>
color: <span class="type"><a href="../qtqml/qml-qtqml-qt.html">Qt</a></span><span class="operator">.</span>rgba(<span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>)
}
GradientStop {
position: <span class="number">0.167</span>
color: <span class="type"><a href="../qtqml/qml-qtqml-qt.html">Qt</a></span><span class="operator">.</span>rgba(<span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>)
}
GradientStop {
position: <span class="number">0.333</span>
color: <span class="type"><a href="../qtqml/qml-qtqml-qt.html">Qt</a></span><span class="operator">.</span>rgba(<span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>)
}
GradientStop {
position: <span class="number">0.500</span>
color: <span class="type"><a href="../qtqml/qml-qtqml-qt.html">Qt</a></span><span class="operator">.</span>rgba(<span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>)
}
GradientStop {
position: <span class="number">0.667</span>
color: <span class="type"><a href="../qtqml/qml-qtqml-qt.html">Qt</a></span><span class="operator">.</span>rgba(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>)
}
GradientStop {
position: <span class="number">0.833</span>
color: <span class="type"><a href="../qtqml/qml-qtqml-qt.html">Qt</a></span><span class="operator">.</span>rgba(<span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>)
}
GradientStop {
position: <span class="number">1.000</span>
color: <span class="type"><a href="../qtqml/qml-qtqml-qt.html">Qt</a></span><span class="operator">.</span>rgba(<span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>)
}
}
</pre>
</td><td ><b>gradient:</b><pre class="cpp">
Gradient {
GradientStop {
position: <span class="number">0.0</span>
color: <span class="string">"#F0F0F0"</span>
}
GradientStop {
position: <span class="number">0.5</span>
color: <span class="string">"#000000"</span>
}
GradientStop {
position: <span class="number">1.0</span>
color: <span class="string">"#F0F0F0"</span>
}
}
</pre>
</td><td ><b>gradient:</b><pre class="cpp">
Gradient {
GradientStop {
position: <span class="number">0.0</span>
color: <span class="string">"#00000000"</span>
}
GradientStop {
position: <span class="number">1.0</span>
color: <span class="string">"#FF000000"</span>
}
}
</pre>
</td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td></tr>
<tr valign="top" class="even"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0</td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td></tr>
</table></div>
</div></div><!-- @@@gradient -->
<br/>
<!-- $$$horizontalOffset -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="horizontalOffset-prop">
<td class="tblQmlPropNode"><p>
<a name="horizontalOffset-prop"></a><span class="name">horizontalOffset</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The horizontalOffset and <a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a> properties define the offset in pixels for the center point of the gradient compared to the item center.</p>
<p>The value ranges from -inf to inf. By default, the properties are set to <code>0</code>.</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Output examples with different horizontalOffset values</th><th ></th><th ></th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/ConicalGradient_horizontalOffset1.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_horizontalOffset2.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_horizontalOffset3.png" alt="" /></p></td></tr>
<tr valign="top" class="even"><td ><b> horizontalOffset: -50 </b></td><td ><b> horizontalOffset: 0 </b></td><td ><b> horizontalOffset: 50 </b></td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td></tr>
<tr valign="top" class="even"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td></tr>
</table></div>
</div></div><!-- @@@horizontalOffset -->
<br/>
<!-- $$$source -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="source-prop">
<td class="tblQmlPropNode"><p>
<a name="source-prop"></a><span class="name">source</span> : <span class="type"><a href="../qtqml/qml-variant.html">variant</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property defines the item that is going to be filled with gradient. Source item gets rendered into an intermediate pixel buffer and the alpha values from the result are used to determine the gradient's pixels visibility in the display. The default value for source is undefined and in that case whole effect area is filled with gradient.</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Output examples with different source values</th><th ></th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/ConicalGradient_maskSource1.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_maskSource2.png" alt="" /></p></td></tr>
<tr valign="top" class="even"><td ><b> source: undefined </b></td><td ><b> source: </b></td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td></tr>
<tr valign="top" class="even"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0</td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#verticalOffset-prop">verticalOffset</a>: 0</td></tr>
</table></div>
<p><b>Note: </b>It is not supported to let the effect include itself, for instance by setting source to the effect's parent.</p></div></div><!-- @@@source -->
<br/>
<!-- $$$verticalOffset -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="verticalOffset-prop">
<td class="tblQmlPropNode"><p>
<a name="verticalOffset-prop"></a><span class="name">verticalOffset</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The <a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a> and verticalOffset properties define the offset in pixels for the center point of the gradient compared to the item center.</p>
<p>The value ranges from -inf to inf. By default, the properties are set to <code>0</code>.</p>
<div class="table"><table class="generic">
<thead><tr class="qt-style"><th >Output examples with different <a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a> values</th><th ></th><th ></th></tr></thead>
<tr valign="top" class="odd"><td ><p class="centerAlign"><img src="images/ConicalGradient_horizontalOffset1.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_horizontalOffset2.png" alt="" /></p></td><td ><p class="centerAlign"><img src="images/ConicalGradient_horizontalOffset3.png" alt="" /></p></td></tr>
<tr valign="top" class="even"><td ><b> <a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: -50 </b></td><td ><b> <a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 0 </b></td><td ><b> <a href="qml-qtgraphicaleffects-conicalgradient.html#horizontalOffset-prop">horizontalOffset</a>: 50 </b></td></tr>
<tr valign="top" class="odd"><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td><td ><a href="qml-qtgraphicaleffects-conicalgradient.html#angle-prop">angle</a>: 0</td></tr>
<tr valign="top" class="even"><td >verticalOffset: 0</td><td >verticalOffset: 0</td><td >verticalOffset: 0</td></tr>
</table></div>
</div></div><!-- @@@verticalOffset -->
<br/>
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