<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>animation.h Example File | Qt Widgets 5.12.6</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 5.12</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-animation-easing-example.html">Easing Curves Example</a></td><td >animation.h Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">animation.h Example File</h1> <span class="subtitle">animation/easing/animation.h</span> <!-- $$$animation/easing/animation.h-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtCore module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#ifndef ANIMATION_H</span> <span class="preprocessor">#define ANIMATION_H</span> <span class="preprocessor">#include <QtWidgets></span> <span class="preprocessor">#include <QtCore/qpropertyanimation.h></span> <span class="keyword">class</span> Animation : <span class="keyword">public</span> <span class="type"><a href="../qtcore/qpropertyanimation.html">QPropertyAnimation</a></span> { <span class="keyword">public</span>: <span class="keyword">enum</span> PathType { LinearPath<span class="operator">,</span> CirclePath<span class="operator">,</span> NPathTypes }; Animation(<span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>target<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> <span class="operator">&</span>prop) : <span class="type"><a href="../qtcore/qpropertyanimation.html">QPropertyAnimation</a></span>(target<span class="operator">,</span> prop) { setPathType(LinearPath); } <span class="type">void</span> setPathType(PathType pathType) { <span class="keyword">if</span> (pathType <span class="operator">></span><span class="operator">=</span> NPathTypes) <a href="../qtcore/qtglobal.html#qWarning">qWarning</a>(<span class="string">"Unknown pathType %d"</span><span class="operator">,</span> pathType); m_pathType <span class="operator">=</span> pathType; m_path <span class="operator">=</span> <span class="type"><a href="../qtgui/qpainterpath.html">QPainterPath</a></span>(); } <span class="type">void</span> updateCurrentTime(<span class="type">int</span> currentTime) override { <span class="keyword">if</span> (m_pathType <span class="operator">=</span><span class="operator">=</span> CirclePath) { <span class="keyword">if</span> (m_path<span class="operator">.</span>isEmpty()) { <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> to <span class="operator">=</span> endValue()<span class="operator">.</span>toPointF(); <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> from <span class="operator">=</span> startValue()<span class="operator">.</span>toPointF(); m_path<span class="operator">.</span>moveTo(from); m_path<span class="operator">.</span>addEllipse(<span class="type"><a href="../qtcore/qrectf.html">QRectF</a></span>(from<span class="operator">,</span> to)); } <span class="type">int</span> dura <span class="operator">=</span> duration(); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> progress <span class="operator">=</span> ((dura <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) <span class="operator">?</span> <span class="number">1</span> : ((((currentTime <span class="operator">-</span> <span class="number">1</span>) <span class="operator">%</span> dura) <span class="operator">+</span> <span class="number">1</span>) <span class="operator">/</span> <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span>(dura))); <span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> easedProgress <span class="operator">=</span> easingCurve()<span class="operator">.</span>valueForProgress(progress); <span class="keyword">if</span> (easedProgress <span class="operator">></span> <span class="number">1.0</span>) { easedProgress <span class="operator">-</span><span class="operator">=</span> <span class="number">1.0</span>; } <span class="keyword">else</span> <span class="keyword">if</span> (easedProgress <span class="operator"><</span> <span class="number">0</span>) { easedProgress <span class="operator">+</span><span class="operator">=</span> <span class="number">1.0</span>; } <span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> pt <span class="operator">=</span> m_path<span class="operator">.</span>pointAtPercent(easedProgress); updateCurrentValue(pt); <span class="keyword">emit</span> valueChanged(pt); } <span class="keyword">else</span> { <span class="type"><a href="../qtcore/qpropertyanimation.html">QPropertyAnimation</a></span><span class="operator">::</span>updateCurrentTime(currentTime); } } <span class="type"><a href="../qtgui/qpainterpath.html">QPainterPath</a></span> m_path; PathType m_pathType; }; <span class="preprocessor">#endif // ANIMATION_H</span> </pre> </div> <!-- @@@animation/easing/animation.h --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 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>