<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qquickanimation.cpp --> <title>RotationAnimation QML Type | Qt Quick 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.9</td><td ><a href="qtquick-index.html">Qt Quick</a></td><td ><a href="qtquick-qmlmodule.html">QML Types</a></td><td >RotationAnimation QML Type</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <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> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">RotationAnimation QML Type</h1> <span class="subtitle"></span> <!-- $$$RotationAnimation-brief --> <p>Animates changes in rotation values <a href="#details">More...</a></p> <!-- @@@RotationAnimation --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtQuick 2.7</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <p><a href="qml-qtquick-propertyanimation.html">PropertyAnimation</a></p> </td></tr></table></div><ul> <li><a href="qml-qtquick-rotationanimation-members.html">List of all members, including inherited members</a></li> </ul> <a name="properties"></a> <h2 id="properties">Properties</h2> <ul> <li class="fn"><b><b><a href="qml-qtquick-rotationanimation.html#direction-prop">direction</a></b></b> : enumeration</li> <li class="fn"><b><b><a href="qml-qtquick-rotationanimation.html#from-prop">from</a></b></b> : real</li> <li class="fn"><b><b><a href="qml-qtquick-rotationanimation.html#to-prop">to</a></b></b> : real</li> </ul> <!-- $$$RotationAnimation-description --> <a name="details"></a> <h2 id="details">Detailed Description</h2> <p><a href="qml-qtquick-rotationanimation.html">RotationAnimation</a> is a specialized <a href="qtquick-animation-example.html#propertyanimation">PropertyAnimation</a> that gives control over the direction of rotation during an animation.</p> <p>By default, it rotates in the direction of the numerical change; a rotation from 0 to 240 will rotate 240 degrees clockwise, while a rotation from 240 to 0 will rotate 240 degrees counterclockwise. The <a href="qml-qtquick-rotationanimation.html#direction-prop">direction</a> property can be set to specify the direction in which the rotation should occur.</p> <p>In the following example we use <a href="qml-qtquick-rotationanimation.html">RotationAnimation</a> to animate the rotation between states via the shortest path:</p> <pre class="qml"> import QtQuick 2.0 <span class="type"><a href="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-qtquick-rectangle.html">Rectangle</a></span> { <span class="name">id</span>: <span class="name">rect</span> <span class="name">width</span>: <span class="number">150</span>; <span class="name">height</span>: <span class="number">100</span>; <span class="name">anchors</span>.centerIn: <span class="name">parent</span> <span class="name">color</span>: <span class="string">"red"</span> <span class="name">antialiasing</span>: <span class="number">true</span> <span class="name">states</span>: <span class="name">State</span> { <span class="name">name</span>: <span class="string">"rotated"</span> <span class="type"><a href="qml-qtquick-propertychanges.html">PropertyChanges</a></span> { <span class="name">target</span>: <span class="name">rect</span>; <span class="name">rotation</span>: <span class="number">180</span> } } <span class="name">transitions</span>: <span class="name">Transition</span> { <span class="type"><a href="qml-qtquick-rotationanimation.html">RotationAnimation</a></span> { <span class="name">duration</span>: <span class="number">1000</span>; <span class="name">direction</span>: <span class="name">RotationAnimation</span>.<span class="name">Counterclockwise</span> } } } <span class="type"><a href="qml-qtquick-mousearea.html">MouseArea</a></span> { <span class="name">anchors</span>.fill: <span class="name">parent</span>; <span class="name">onClicked</span>: <span class="name">rect</span>.<span class="name">state</span> <span class="operator">=</span> <span class="string">"rotated"</span> } } </pre> <p>Notice the <a href="qml-qtquick-rotationanimation.html">RotationAnimation</a> did not need to set a <code>target</code> value. As a convenience, when used in a transition, <a href="qml-qtquick-rotationanimation.html">RotationAnimation</a> will rotate all properties named "rotation" or "angle". You can override this by providing your own properties via <a href="qml-qtquick-propertyanimation.html#properties-prop">properties</a> or <a href="qml-qtquick-propertyanimation.html#property-prop">property</a>.</p> <p>Also, note the <a href="qml-qtquick-rectangle.html">Rectangle</a> will be rotated around its default <a href="qml-qtquick-item.html#transformOrigin-prop">transformOrigin</a> (which is <code>Item.Center</code>). To use a different transform origin, set the origin in the <a href="qml-qtquick-propertychanges.html">PropertyChanges</a> object and apply the change at the start of the animation using <a href="qml-qtquick-propertyaction.html">PropertyAction</a>. See the <a href="qml-qtquick-propertyaction.html">PropertyAction</a> documentation for more details.</p> <p>Like any other animation type, a <a href="qml-qtquick-rotationanimation.html">RotationAnimation</a> can be applied in a number of ways, including transitions, behaviors and property value sources. The <a href="qtquick-statesanimations-animations.html">Animation and Transitions in Qt Quick</a> documentation shows a variety of methods for creating animations.</p> <p><b>See also </b><a href="qtquick-statesanimations-animations.html">Animation and Transitions in Qt Quick</a> and <a href="qtquick-animation-example.html">Qt Quick Examples - Animation</a>.</p> <!-- @@@RotationAnimation --> <h2>Property Documentation</h2> <!-- $$$direction --> <div class="qmlitem"><div class="qmlproto"> <div class="table"><table class="qmlname"> <tr valign="top" class="odd" id="direction-prop"> <td class="tblQmlPropNode"><p> <a name="direction-prop"></a><span class="name">direction</span> : <span class="type">enumeration</span></p></td></tr> </table></div> </div><div class="qmldoc"><p>This property holds the direction of the rotation.</p> <p>Possible values are:</p> <ul> <li><a href="qml-qtquick-rotationanimation.html">RotationAnimation</a>.Numerical (default) - Rotate by linearly interpolating between the two numbers. A rotation from 10 to 350 will rotate 340 degrees clockwise.</li> <li><a href="qml-qtquick-rotationanimation.html">RotationAnimation</a>.Clockwise - Rotate clockwise between the two values</li> <li><a href="qml-qtquick-rotationanimation.html">RotationAnimation</a>.Counterclockwise - Rotate counterclockwise between the two values</li> <li><a href="qml-qtquick-rotationanimation.html">RotationAnimation</a>.Shortest - Rotate in the direction that produces the shortest animation path. A rotation from 10 to 350 will rotate 20 degrees counterclockwise.</li> </ul> </div></div><!-- @@@direction --> <br/> <!-- $$$from --> <div class="qmlitem"><div class="qmlproto"> <div class="table"><table class="qmlname"> <tr valign="top" class="odd" id="from-prop"> <td class="tblQmlPropNode"><p> <a name="from-prop"></a><span class="name">from</span> : <span class="type">real</span></p></td></tr> </table></div> </div><div class="qmldoc"><p>This property holds the starting value for the animation.</p> <p>For example, the following animation is not applied until the <code>angle</code> value has reached 100:</p> <pre class="qml"> <span class="type"><a href="qml-qtquick-item.html">Item</a></span> { <span class="name">states</span>: [ <span class="comment">// ...</span> ] <span class="name">transition</span>: <span class="name">Transition</span> { <span class="type"><a href="qml-qtquick-rotationanimation.html">RotationAnimation</a></span> { <span class="name">properties</span>: <span class="string">"angle"</span>; <span class="name">from</span>: <span class="number">100</span>; <span class="name">duration</span>: <span class="number">2000</span> } } } </pre> <p>If the <a href="qml-qtquick-rotationanimation.html">RotationAnimation</a> is defined within a <a href="qmlexampletoggleswitch.html#transition">Transition</a> or <a href="qml-qtquick-behavior.html">Behavior</a>, this value defaults to the value defined in the starting state of the <a href="qmlexampletoggleswitch.html#transition">Transition</a>, or the current value of the property at the moment the <a href="qml-qtquick-behavior.html">Behavior</a> is triggered.</p> <p><b>See also </b><a href="qtquick-statesanimations-animations.html">Animation and Transitions in Qt Quick</a>.</p> </div></div><!-- @@@from --> <br/> <!-- $$$to --> <div class="qmlitem"><div class="qmlproto"> <div class="table"><table class="qmlname"> <tr valign="top" class="odd" id="to-prop"> <td class="tblQmlPropNode"><p> <a name="to-prop"></a><span class="name">to</span> : <span class="type">real</span></p></td></tr> </table></div> </div><div class="qmldoc"><p>This property holds the end value for the animation..</p> <p>If the <a href="qml-qtquick-rotationanimation.html">RotationAnimation</a> is defined within a <a href="qmlexampletoggleswitch.html#transition">Transition</a> or <a href="qml-qtquick-behavior.html">Behavior</a>, this value defaults to the value defined in the end state of the <a href="qmlexampletoggleswitch.html#transition">Transition</a>, or the value of the property change that triggered the <a href="qml-qtquick-behavior.html">Behavior</a>.</p> <p><b>See also </b><a href="qtquick-statesanimations-animations.html">Animation and Transitions in Qt Quick</a>.</p> </div></div><!-- @@@to --> <br/> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>