<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qquickpathinterpolator.cpp --> <title>PathInterpolator 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 >PathInterpolator 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">PathInterpolator QML Type</h1> <span class="subtitle"></span> <!-- $$$PathInterpolator-brief --> <p>Specifies how to manually animate along a path <a href="#details">More...</a></p> <!-- @@@PathInterpolator --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtQuick 2.7</td></tr></table></div><ul> <li><a href="qml-qtquick-pathinterpolator-members.html">List of all members, including inherited members</a></li> </ul> <a name="properties"></a> <h2 id="properties">Properties</h2> <ul> <li class="fn"><b><b><a href="qml-qtquick-pathinterpolator.html#angle-prop">angle</a></b></b> : real</li> <li class="fn"><b><b><a href="qml-qtquick-pathinterpolator.html#path-prop">path</a></b></b> : Path</li> <li class="fn"><b><b><a href="qml-qtquick-pathinterpolator.html#progress-prop">progress</a></b></b> : real</li> <li class="fn"><b><b><a href="qml-qtquick-pathinterpolator.html#x-prop">x</a></b></b> : real</li> <li class="fn"><b><b><a href="qml-qtquick-pathinterpolator.html#y-prop">y</a></b></b> : real</li> </ul> <!-- $$$PathInterpolator-description --> <a name="details"></a> <h2 id="details">Detailed Description</h2> <p><a href="qtquick-animation-example.html#pathinterpolator">PathInterpolator</a> provides <code>x</code>, <code>y</code>, and <code>angle</code> information for a particular <code>progress</code> along a path.</p> <p>In the following example, we animate a green rectangle along a bezier path.</p> <pre class="qml"> import QtQuick 2.0 <span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></span> { <span class="name">width</span>: <span class="number">400</span> <span class="name">height</span>: <span class="number">400</span> <span class="type"><a href="qml-qtquick-pathinterpolator.html">PathInterpolator</a></span> { <span class="name">id</span>: <span class="name">motionPath</span> <span class="name">path</span>: <span class="name">Path</span> { <span class="name">startX</span>: <span class="number">0</span>; <span class="name">startY</span>: <span class="number">0</span> <span class="type"><a href="qml-qtquick-pathcubic.html">PathCubic</a></span> { <span class="name">x</span>: <span class="number">350</span>; <span class="name">y</span>: <span class="number">350</span> <span class="name">control1X</span>: <span class="number">350</span>; <span class="name">control1Y</span>: <span class="number">0</span> <span class="name">control2X</span>: <span class="number">0</span>; <span class="name">control2Y</span>: <span class="number">350</span> } } NumberAnimation on <span class="name">progress</span> { <span class="name">from</span>: <span class="number">0</span>; <span class="name">to</span>: <span class="number">1</span>; <span class="name">duration</span>: <span class="number">2000</span> } } <span class="type"><a href="qml-qtquick-rectangle.html">Rectangle</a></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">"green"</span> <span class="comment">//bind our attributes to follow the path as progress changes</span> <span class="name">x</span>: <span class="name">motionPath</span>.<span class="name">x</span> <span class="name">y</span>: <span class="name">motionPath</span>.<span class="name">y</span> <span class="name">rotation</span>: <span class="name">motionPath</span>.<span class="name">angle</span> } } </pre> <!-- @@@PathInterpolator --> <h2>Property Documentation</h2> <!-- $$$angle --> <div class="qmlitem"><div class="qmlproto"> <div class="table"><table class="qmlname"> <tr valign="top" class="odd" id="angle-prop"> <td class="tblQmlPropNode"><p> <a name="angle-prop"></a><span class="name">angle</span> : <span class="type">real</span></p></td></tr> </table></div> </div><div class="qmldoc"><p>This property holds the angle of the path tangent at <a href="qml-qtquick-pathinterpolator.html#progress-prop">progress</a>.</p> <p>Angles are reported clockwise, with zero degrees at the 3 o'clock position.</p> </div></div><!-- @@@angle --> <br/> <!-- $$$path --> <div class="qmlitem"><div class="qmlproto"> <div class="table"><table class="qmlname"> <tr valign="top" class="odd" id="path-prop"> <td class="tblQmlPropNode"><p> <a name="path-prop"></a><span class="name">path</span> : <span class="type"><a href="qml-qtquick-path.html">Path</a></span></p></td></tr> </table></div> </div><div class="qmldoc"><p>This property holds the path to interpolate.</p> <p>For more information on defining a path see the <a href="qml-qtquick-path.html">Path</a> documentation.</p> </div></div><!-- @@@path --> <br/> <!-- $$$progress --> <div class="qmlitem"><div class="qmlproto"> <div class="table"><table class="qmlname"> <tr valign="top" class="odd" id="progress-prop"> <td class="tblQmlPropNode"><p> <a name="progress-prop"></a><span class="name">progress</span> : <span class="type">real</span></p></td></tr> </table></div> </div><div class="qmldoc"><p>This property holds the current progress along the path.</p> <p>Typical usage of <a href="qtquick-animation-example.html#pathinterpolator">PathInterpolator</a> is to set the progress (often via a <a href="qml-qtquick-numberanimation.html">NumberAnimation</a>), and read the corresponding values for x, y, and angle (often via bindings to these values).</p> <p>Progress ranges from 0.0 to 1.0.</p> </div></div><!-- @@@progress --> <br/> <!-- $$$x --> <div class="qmlitem"><div class="qmlproto"> <div class="table"><table class="qmlname"> <tr valign="top" class="odd" id="x-prop"> <td class="tblQmlPropNode"><p> <a name="x-prop"></a><span class="name">x</span> : <span class="type">real</span></p></td></tr> </table></div> </div><div class="qmldoc"><p>These properties hold the position of the path at <a href="qml-qtquick-pathinterpolator.html#progress-prop">progress</a>.</p> </div></div><!-- @@@x --> <br/> <!-- $$$y --> <div class="qmlitem"><div class="qmlproto"> <div class="table"><table class="qmlname"> <tr valign="top" class="odd" id="y-prop"> <td class="tblQmlPropNode"><p> <a name="y-prop"></a><span class="name">y</span> : <span class="type">real</span></p></td></tr> </table></div> </div><div class="qmldoc"><p>These properties hold the position of the path at <a href="qml-qtquick-pathinterpolator.html#progress-prop">progress</a>.</p> </div></div><!-- @@@y --> <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>