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<?xml version="1.0" encoding="UTF-8"?>
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<!-- qdeclarativeanimation.cpp -->
<title>Qt 4.8: QML ParentAnimation Element</title>
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<a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QML ParentAnimation Element</h1>
<span class="subtitle"></span>
<!-- $$$ParentAnimation-brief -->
<p>The ParentAnimation element animates changes in parent values. <a href="#details">More...</a></p>
<!-- @@@ParentAnimation -->
<p>Inherits <a href="qml-animation.html">Animation</a></p>
<p>This element was introduced in Qt 4.7.</p>
<ul>
<li><a href="qml-parentanimation-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="properties"></a>
<h2>Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-parentanimation.html#newParent-prop">newParent</a></b></b> : Item</li>
<li class="fn"><b><b><a href="qml-parentanimation.html#target-prop">target</a></b></b> : Item</li>
<li class="fn"><b><b><a href="qml-parentanimation.html#via-prop">via</a></b></b> : Item</li>
</ul>
<!-- $$$ParentAnimation-description -->
<a name="details"></a>
<h2>Detailed Description</h2>
<p>ParentAnimation is used to animate a parent change for an <a href="qml-item.html">Item</a>.</p>
<p>For example, the following <a href="qml-parentchange.html">ParentChange</a> changes <tt>blueRect</tt> to become a child of <tt>redRect</tt> when it is clicked. The inclusion of the ParentAnimation, which defines a <a href="qml-numberanimation.html">NumberAnimation</a> to be applied during the transition, ensures the item animates smoothly as it moves to its new parent:</p>
<pre class="qml"> import QtQuick 1.0
<span class="type"><a href="qml-item.html">Item</a></span> {
<span class="name">width</span>: <span class="number">200</span>; <span class="name">height</span>: <span class="number">100</span>
<span class="type"><a href="qml-rectangle.html">Rectangle</a></span> {
<span class="name">id</span>: <span class="name">redRect</span>
<span class="name">width</span>: <span class="number">100</span>; <span class="name">height</span>: <span class="number">100</span>
<span class="name">color</span>: <span class="string">"red"</span>
}
<span class="type"><a href="qml-rectangle.html">Rectangle</a></span> {
<span class="name">id</span>: <span class="name">blueRect</span>
<span class="name">x</span>: <span class="name">redRect</span>.<span class="name">width</span>
<span class="name">width</span>: <span class="number">50</span>; <span class="name">height</span>: <span class="number">50</span>
<span class="name">color</span>: <span class="string">"blue"</span>
<span class="name">states</span>: <span class="name">State</span> {
<span class="name">name</span>: <span class="string">"reparented"</span>
<span class="type"><a href="qml-parentchange.html">ParentChange</a></span> { <span class="name">target</span>: <span class="name">blueRect</span>; <span class="name">parent</span>: <span class="name">redRect</span>; <span class="name">x</span>: <span class="number">10</span>; <span class="name">y</span>: <span class="number">10</span> }
}
<span class="name">transitions</span>: <span class="name">Transition</span> {
<span class="type">ParentAnimation</span> {
<span class="type"><a href="qml-numberanimation.html">NumberAnimation</a></span> { <span class="name">properties</span>: <span class="string">"x,y"</span>; <span class="name">duration</span>: <span class="number">1000</span> }
}
}
<span class="type"><a href="qml-mousearea.html">MouseArea</a></span> { <span class="name">anchors</span>.fill: <span class="name">parent</span>; <span class="name">onClicked</span>: <span class="name">blueRect</span>.<span class="name">state</span> <span class="operator">=</span> <span class="string">"reparented"</span> }
}
}</pre>
<p>A ParentAnimation can contain any number of animations. These animations will be run in parallel; to run them sequentially, define them within a <a href="qml-sequentialanimation.html">SequentialAnimation</a>.</p>
<p>In some cases, such as when reparenting between items with clipping enabled, it is useful to animate the parent change via another item that does not have clipping enabled. Such an item can be set using the <a href="qml-parentanimation.html#via-prop">via</a> property.</p>
<p>For convenience, when a ParentAnimation is used in a <a href="qml-transition.html">Transition</a>, it will animate any <a href="qml-parentchange.html">ParentChange</a> that has occurred during the state change. This can be overridden by setting a specific target item using the <a href="qml-parentanimation.html#target-prop">target</a> property.</p>
<p>Like any other animation element, a ParentAnimation can be applied in a number of ways, including transitions, behaviors and property value sources. The <a href="qdeclarativeanimation.html">QML Animation and Transitions</a> documentation shows a variety of methods for creating animations.</p>
<p><b>See also </b><a href="qdeclarativeanimation.html">QML Animation and Transitions</a> and Animation basics example.</p>
<!-- @@@ParentAnimation -->
<h2>Property Documentation</h2>
<!-- $$$newParent -->
<div class="qmlitem"><div class="qmlproto"><table class="qmlname"><tr valign="top" class="odd"><td class="tblQmlPropNode"><p><a name="newParent-prop"></a><span class="name">newParent</span> : <span class="type"><a href="qml-item.html">Item</a></span></p></td></tr></table></div><div class="qmldoc"><p>The new parent to animate to.</p>
<p>If the <a href="qml-parentanimation.html">ParentAnimation</a> is defined within a <a href="qml-transition.html">Transition</a> or <a href="qml-behavior.html">Behavior</a>, this value defaults to the value defined in the end state of the <a href="qml-transition.html">Transition</a>, or the value of the property change that triggered the <a href="qml-behavior.html">Behavior</a>.</p>
</div></div><!-- @@@newParent -->
<br/>
<!-- $$$target -->
<div class="qmlitem"><div class="qmlproto"><table class="qmlname"><tr valign="top" class="odd"><td class="tblQmlPropNode"><p><a name="target-prop"></a><span class="name">target</span> : <span class="type"><a href="qml-item.html">Item</a></span></p></td></tr></table></div><div class="qmldoc"><p>The item to reparent.</p>
<p>When used in a transition, if no target is specified, all <a href="qml-parentchange.html">ParentChange</a> occurrences are animated by the <a href="qml-parentanimation.html">ParentAnimation</a>.</p>
</div></div><!-- @@@target -->
<br/>
<!-- $$$via -->
<div class="qmlitem"><div class="qmlproto"><table class="qmlname"><tr valign="top" class="odd"><td class="tblQmlPropNode"><p><a name="via-prop"></a><span class="name">via</span> : <span class="type"><a href="qml-item.html">Item</a></span></p></td></tr></table></div><div class="qmldoc"><p>The item to reparent via. This provides a way to do an unclipped animation when both the old parent and new parent are clipped.</p>
<pre class="qml"> <span class="type"><a href="qml-parentanimation.html">ParentAnimation</a></span> {
<span class="name">target</span>: <span class="name">myItem</span>
<span class="name">via</span>: <span class="name">topLevelItem</span>
<span class="comment">// ...</span>
}</pre>
</div></div><!-- @@@via -->
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