<?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>lifecycle.cpp 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-stickman-example.html">Stickman Example</a></td><td >lifecycle.cpp 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">lifecycle.cpp Example File</h1> <span class="subtitle">animation/stickman/lifecycle.cpp</span> <!-- $$$animation/stickman/lifecycle.cpp-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">#include "lifecycle.h"</span> <span class="preprocessor">#include "stickman.h"</span> <span class="preprocessor">#include "node.h"</span> <span class="preprocessor">#include "animation.h"</span> <span class="preprocessor">#include "graphicsview.h"</span> <span class="preprocessor">#include <QtCore></span> <span class="preprocessor">#include <QtWidgets></span> <span class="keyword">class</span> KeyPressTransition: <span class="keyword">public</span> <span class="type"><a href="../qtcore/qsignaltransition.html">QSignalTransition</a></span> { <span class="keyword">public</span>: KeyPressTransition(GraphicsView <span class="operator">*</span>receiver<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Key key) : <span class="type"><a href="../qtcore/qsignaltransition.html">QSignalTransition</a></span>(receiver<span class="operator">,</span> SIGNAL(keyPressed(<span class="type">int</span>)))<span class="operator">,</span> m_key(key) { } KeyPressTransition(GraphicsView <span class="operator">*</span>receiver<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Key key<span class="operator">,</span> <span class="type"><a href="../qtcore/qabstractstate.html">QAbstractState</a></span> <span class="operator">*</span>target) : <span class="type"><a href="../qtcore/qsignaltransition.html">QSignalTransition</a></span>(receiver<span class="operator">,</span> SIGNAL(keyPressed(<span class="type">int</span>)))<span class="operator">,</span> m_key(key) { setTargetState(target); } bool eventTest(<span class="type"><a href="../qtcore/qevent.html">QEvent</a></span> <span class="operator">*</span>e) override { <span class="keyword">if</span> (<span class="type"><a href="../qtcore/qsignaltransition.html">QSignalTransition</a></span><span class="operator">::</span>eventTest(e)) { <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> key <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="../qtcore/qstatemachine.html">QStateMachine</a></span><span class="operator">::</span>SignalEvent<span class="operator">*</span><span class="operator">></span>(e)<span class="operator">-</span><span class="operator">></span>arguments()<span class="operator">.</span>at(<span class="number">0</span>); <span class="keyword">return</span> (key<span class="operator">.</span>toInt() <span class="operator">=</span><span class="operator">=</span> <span class="type">int</span>(m_key)); } <span class="keyword">return</span> <span class="keyword">false</span>; } <span class="keyword">private</span>: <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Key m_key; }; <span class="keyword">class</span> LightningStrikesTransition: <span class="keyword">public</span> <span class="type"><a href="../qtcore/qeventtransition.html">QEventTransition</a></span> { <span class="keyword">public</span>: LightningStrikesTransition(<span class="type"><a href="../qtcore/qabstractstate.html">QAbstractState</a></span> <span class="operator">*</span>target) : <span class="type"><a href="../qtcore/qeventtransition.html">QEventTransition</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qevent.html">QEvent</a></span><span class="operator">::</span>Timer) { setTargetState(target); startTimer(<span class="number">1000</span>); } bool eventTest(<span class="type"><a href="../qtcore/qevent.html">QEvent</a></span> <span class="operator">*</span>e) override { <span class="keyword">return</span> <span class="type"><a href="../qtcore/qeventtransition.html">QEventTransition</a></span><span class="operator">::</span>eventTest(e) <span class="operator">&</span><span class="operator">&</span> <span class="type"><a href="../qtcore/qrandomgenerator.html">QRandomGenerator</a></span><span class="operator">::</span>global()<span class="operator">-</span><span class="operator">></span>bounded(<span class="number">50</span>) <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>; } }; LifeCycle<span class="operator">::</span>LifeCycle(StickMan <span class="operator">*</span>stickMan<span class="operator">,</span> GraphicsView <span class="operator">*</span>keyReceiver) : m_stickMan(stickMan)<span class="operator">,</span> m_keyReceiver(keyReceiver) { <span class="comment">// Create animation group to be used for all transitions</span> m_animationGroup <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qparallelanimationgroup.html">QParallelAnimationGroup</a></span>(); <span class="keyword">const</span> <span class="type">int</span> stickManNodeCount <span class="operator">=</span> m_stickMan<span class="operator">-</span><span class="operator">></span>nodeCount(); <span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">0</span>; i<span class="operator"><</span>stickManNodeCount; <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="../qtcore/qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>pa <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qpropertyanimation.html">QPropertyAnimation</a></span>(m_stickMan<span class="operator">-</span><span class="operator">></span>node(i)<span class="operator">,</span> <span class="string">"pos"</span>); m_animationGroup<span class="operator">-</span><span class="operator">></span>addAnimation(pa); } <span class="comment">// Set up initial state graph</span> m_machine <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstatemachine.html">QStateMachine</a></span>(); m_machine<span class="operator">-</span><span class="operator">></span>addDefaultAnimation(m_animationGroup); m_alive <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span>(m_machine); m_alive<span class="operator">-</span><span class="operator">></span>setObjectName(<span class="string">"alive"</span>); <span class="comment">// Make it blink when lightning strikes before entering dead animation</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>lightningBlink <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span>(m_machine); lightningBlink<span class="operator">-</span><span class="operator">></span>assignProperty(m_stickMan<span class="operator">-</span><span class="operator">></span>scene()<span class="operator">,</span> <span class="string">"backgroundBrush"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>white)); lightningBlink<span class="operator">-</span><span class="operator">></span>assignProperty(m_stickMan<span class="operator">,</span> <span class="string">"penColor"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black)); lightningBlink<span class="operator">-</span><span class="operator">></span>assignProperty(m_stickMan<span class="operator">,</span> <span class="string">"fillColor"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>white)); lightningBlink<span class="operator">-</span><span class="operator">></span>assignProperty(m_stickMan<span class="operator">,</span> <span class="string">"isDead"</span><span class="operator">,</span> <span class="keyword">true</span>); <span class="type"><a href="../qtcore/qtimer.html">QTimer</a></span> <span class="operator">*</span>timer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qtimer.html">QTimer</a></span>(lightningBlink); timer<span class="operator">-</span><span class="operator">></span>setSingleShot(<span class="keyword">true</span>); timer<span class="operator">-</span><span class="operator">></span>setInterval(<span class="number">100</span>); <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>connect(lightningBlink<span class="operator">,</span> SIGNAL(entered())<span class="operator">,</span> timer<span class="operator">,</span> SLOT(start())); <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>connect(lightningBlink<span class="operator">,</span> SIGNAL(exited())<span class="operator">,</span> timer<span class="operator">,</span> SLOT(stop())); m_dead <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span>(m_machine); m_dead<span class="operator">-</span><span class="operator">></span>assignProperty(m_stickMan<span class="operator">-</span><span class="operator">></span>scene()<span class="operator">,</span> <span class="string">"backgroundBrush"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black)); m_dead<span class="operator">-</span><span class="operator">></span>assignProperty(m_stickMan<span class="operator">,</span> <span class="string">"penColor"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>white)); m_dead<span class="operator">-</span><span class="operator">></span>assignProperty(m_stickMan<span class="operator">,</span> <span class="string">"fillColor"</span><span class="operator">,</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black)); m_dead<span class="operator">-</span><span class="operator">></span>setObjectName(<span class="string">"dead"</span>); <span class="comment">// Idle state (sets no properties)</span> m_idle <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span>(m_alive); m_idle<span class="operator">-</span><span class="operator">></span>setObjectName(<span class="string">"idle"</span>); m_alive<span class="operator">-</span><span class="operator">></span>setInitialState(m_idle); <span class="comment">// Lightning strikes at random</span> m_alive<span class="operator">-</span><span class="operator">></span>addTransition(<span class="keyword">new</span> LightningStrikesTransition(lightningBlink)); lightningBlink<span class="operator">-</span><span class="operator">></span>addTransition(timer<span class="operator">,</span> SIGNAL(timeout())<span class="operator">,</span> m_dead); m_machine<span class="operator">-</span><span class="operator">></span>setInitialState(m_alive); } <span class="type">void</span> LifeCycle<span class="operator">::</span>setDeathAnimation(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName) { <span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>deathAnimation <span class="operator">=</span> makeState(m_dead<span class="operator">,</span> fileName); m_dead<span class="operator">-</span><span class="operator">></span>setInitialState(deathAnimation); } <span class="type">void</span> LifeCycle<span class="operator">::</span>start() { m_machine<span class="operator">-</span><span class="operator">></span>start(); } <span class="type">void</span> LifeCycle<span class="operator">::</span>addActivity(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Key key<span class="operator">,</span> <span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>sender<span class="operator">,</span> <span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>signal) { <span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>state <span class="operator">=</span> makeState(m_alive<span class="operator">,</span> fileName); m_alive<span class="operator">-</span><span class="operator">></span>addTransition(<span class="keyword">new</span> KeyPressTransition(m_keyReceiver<span class="operator">,</span> key<span class="operator">,</span> state)); <span class="keyword">if</span>((sender <span class="operator">!</span><span class="operator">=</span> NULL) <span class="operator">|</span><span class="operator">|</span> (signal <span class="operator">!</span><span class="operator">=</span> NULL)) { m_alive<span class="operator">-</span><span class="operator">></span>addTransition(sender<span class="operator">,</span> signal<span class="operator">,</span> state); } } <span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>LifeCycle<span class="operator">::</span>makeState(<span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>parentState<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>animationFileName) { <span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>topLevel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span>(parentState); Animation animation; { <span class="type"><a href="../qtcore/qfile.html">QFile</a></span> file(animationFileName); <span class="keyword">if</span> (file<span class="operator">.</span>open(<span class="type"><a href="../qtcore/qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly)) animation<span class="operator">.</span>load(<span class="operator">&</span>file); } <span class="keyword">const</span> <span class="type">int</span> frameCount <span class="operator">=</span> animation<span class="operator">.</span>totalFrames(); <span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>previousState <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span> (<span class="type">int</span> i<span class="operator">=</span><span class="number">0</span>; i<span class="operator"><</span>frameCount; <span class="operator">+</span><span class="operator">+</span>i) { animation<span class="operator">.</span>setCurrentFrame(i); <span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>frameState <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span>(topLevel); <span class="keyword">const</span> <span class="type">int</span> nodeCount <span class="operator">=</span> animation<span class="operator">.</span>nodeCount(); <span class="keyword">for</span> (<span class="type">int</span> j<span class="operator">=</span><span class="number">0</span>; j<span class="operator"><</span>nodeCount; <span class="operator">+</span><span class="operator">+</span>j) frameState<span class="operator">-</span><span class="operator">></span>assignProperty(m_stickMan<span class="operator">-</span><span class="operator">></span>node(j)<span class="operator">,</span> <span class="string">"pos"</span><span class="operator">,</span> animation<span class="operator">.</span>nodePos(j)); frameState<span class="operator">-</span><span class="operator">></span>setObjectName(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromLatin1(<span class="string">"frame %0"</span>)<span class="operator">.</span>arg(i)); <span class="keyword">if</span> (previousState <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) topLevel<span class="operator">-</span><span class="operator">></span>setInitialState(frameState); <span class="keyword">else</span> previousState<span class="operator">-</span><span class="operator">></span>addTransition(previousState<span class="operator">,</span> SIGNAL(propertiesAssigned())<span class="operator">,</span> frameState); previousState <span class="operator">=</span> frameState; } <span class="comment">// Loop</span> previousState<span class="operator">-</span><span class="operator">></span>addTransition(previousState<span class="operator">,</span> SIGNAL(propertiesAssigned())<span class="operator">,</span> topLevel<span class="operator">-</span><span class="operator">></span>initialState()); <span class="keyword">return</span> topLevel; } LifeCycle<span class="operator">::</span><span class="operator">~</span>LifeCycle() { <span class="keyword">delete</span> m_machine; <span class="keyword">delete</span> m_animationGroup; } </pre> </div> <!-- @@@animation/stickman/lifecycle.cpp --> </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>