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<title>Qt 4.8: QML AnchorChanges Element</title>
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<li><a href="qdeclarativeelements.html">QML Elements</a></li>
<li>QML AnchorChanges Element</li>
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<li class="level1"><a href="#properties">Properties</a></li>
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<h1 class="title">QML AnchorChanges Element</h1>
<span class="subtitle"></span>
<!-- $$$AnchorChanges-brief -->
<p>The AnchorChanges element allows you to change the anchors of an item in a state. <a href="#details">More...</a></p>
<!-- @@@AnchorChanges -->
<ul>
<li><a href="qml-anchorchanges-members.html">List of all members, including inherited members</a></li>
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<a name="properties"></a>
<h2>Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-anchorchanges.html#anchors.baseline-prop">anchors.baseline</a></b></b> : AnchorLine</li>
<li class="fn"><b><b><a href="qml-anchorchanges.html#anchors.bottom-prop">anchors.bottom</a></b></b> : AnchorLine</li>
<li class="fn"><b><b><a href="qml-anchorchanges.html#anchors.horizontalCenter-prop">anchors.horizontalCenter</a></b></b> : AnchorLine</li>
<li class="fn"><b><b><a href="qml-anchorchanges.html#anchors.left-prop">anchors.left</a></b></b> : AnchorLine</li>
<li class="fn"><b><b><a href="qml-anchorchanges.html#anchors.right-prop">anchors.right</a></b></b> : AnchorLine</li>
<li class="fn"><b><b><a href="qml-anchorchanges.html#anchors.top-prop">anchors.top</a></b></b> : AnchorLine</li>
<li class="fn"><b><b><a href="qml-anchorchanges.html#anchors.verticalCenter-prop">anchors.verticalCenter</a></b></b> : AnchorLine</li>
<li class="fn"><b><b><a href="qml-anchorchanges.html#target-prop">target</a></b></b> : Item</li>
</ul>
<!-- $$$AnchorChanges-description -->
<a name="details"></a>
<h2>Detailed Description</h2>
<p>The AnchorChanges element is used to modify the anchors of an item in a <a href="qml-state.html">State</a>.</p>
<p>AnchorChanges cannot be used to modify the margins on an item. For this, use <a href="qml-propertychanges.html">PropertyChanges</a> intead.</p>
<p>In the following example we change the top and bottom anchors of an item using AnchorChanges, and the top and bottom anchor margins using <a href="qml-propertychanges.html">PropertyChanges</a>:</p>
<pre class="qml"> import QtQuick 1.0
<span class="type"><a href="qml-rectangle.html">Rectangle</a></span> {
<span class="name">id</span>: <span class="name">window</span>
<span class="name">width</span>: <span class="number">120</span>; <span class="name">height</span>: <span class="number">120</span>
<span class="name">color</span>: <span class="string">"black"</span>
<span class="type"><a href="qml-rectangle.html">Rectangle</a></span> { <span class="name">id</span>: <span class="name">myRect</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">"red"</span> }
<span class="name">states</span>: <span class="name">State</span> {
<span class="name">name</span>: <span class="string">"reanchored"</span>
<span class="type">AnchorChanges</span> {
<span class="name">target</span>: <span class="name">myRect</span>
<span class="name">anchors</span>.top: <span class="name">window</span>.<span class="name">top</span>
<span class="name">anchors</span>.bottom: <span class="name">window</span>.<span class="name">bottom</span>
}
<span class="type"><a href="qml-propertychanges.html">PropertyChanges</a></span> {
<span class="name">target</span>: <span class="name">myRect</span>
<span class="name">anchors</span>.topMargin: <span class="number">10</span>
<span class="name">anchors</span>.bottomMargin: <span class="number">10</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">window</span>.<span class="name">state</span> <span class="operator">=</span> <span class="string">"reanchored"</span> }
}</pre>
<p class="centerAlign"><img src="images/anchorchanges.png" alt="" /></p><p>AnchorChanges can be animated using <a href="qml-anchoranimation.html">AnchorAnimation</a>.</p>
<pre class="qml"> <span class="comment">//animate our anchor changes</span>
<span class="type"><a href="qml-transition.html">Transition</a></span> {
<span class="type"><a href="qml-anchoranimation.html">AnchorAnimation</a></span> {}
}</pre>
<p>Margin animations can be animated using <a href="qml-numberanimation.html">NumberAnimation</a>.</p>
<p>For more information on anchors see <a href="qml-anchor-layout.html#anchor-layout">Anchor Layouts</a>.</p>
<!-- @@@AnchorChanges -->
<h2>Property Documentation</h2>
<!-- $$$anchors.left -->
<div class="qmlitem"><div class="qmlproto"><table class="qmlname"><tr valign="top" class="odd"><td class="tblQmlPropNode"><p><a name="anchors.left-prop"></a><span class="name">anchors.left</span> : <span class="type">AnchorLine</span></p></td></tr><tr valign="top" class="even"><td class="tblQmlPropNode"><p><a name="anchors.right-prop"></a><span class="name">anchors.right</span> : <span class="type">AnchorLine</span></p></td></tr><tr valign="top" class="odd"><td class="tblQmlPropNode"><p><a name="anchors.horizontalCenter-prop"></a><span class="name">anchors.horizontalCenter</span> : <span class="type">AnchorLine</span></p></td></tr><tr valign="top" class="even"><td class="tblQmlPropNode"><p><a name="anchors.top-prop"></a><span class="name">anchors.top</span> : <span class="type">AnchorLine</span></p></td></tr><tr valign="top" class="odd"><td class="tblQmlPropNode"><p><a name="anchors.bottom-prop"></a><span class="name">anchors.bottom</span> : <span class="type">AnchorLine</span></p></td></tr><tr valign="top" class="even"><td class="tblQmlPropNode"><p><a name="anchors.verticalCenter-prop"></a><span class="name">anchors.verticalCenter</span> : <span class="type">AnchorLine</span></p></td></tr><tr valign="top" class="odd"><td class="tblQmlPropNode"><p><a name="anchors.baseline-prop"></a><span class="name">anchors.baseline</span> : <span class="type">AnchorLine</span></p></td></tr></table></div><div class="qmldoc"><p>These properties change the respective anchors of the item.</p>
<p>To reset an anchor you can assign <tt>undefined</tt>:</p>
<pre class="qml"> <span class="type"><a href="qml-anchorchanges.html">AnchorChanges</a></span> {
<span class="name">target</span>: <span class="name">myItem</span>
<span class="name">anchors</span>.left: <span class="name">undefined</span> <span class="comment">//remove myItem's left anchor</span>
<span class="name">anchors</span>.right: <span class="name">otherItem</span>.<span class="name">right</span>
}</pre>
</div></div><!-- @@@anchors.left -->
<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>This property holds the <a href="qml-item.html">Item</a> for which the anchor changes will be applied.</p>
</div></div><!-- @@@target -->
<br/>
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