<?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>torpedo.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-sub-attaq-example.html">Sub-Attaq</a></td><td >torpedo.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">torpedo.cpp Example File</h1> <span class="subtitle">animation/sub-attaq/torpedo.cpp</span> <!-- $$$animation/sub-attaq/torpedo.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="comment">//Own</span> <span class="preprocessor">#include "torpedo.h"</span> <span class="preprocessor">#include "pixmapitem.h"</span> <span class="preprocessor">#include "boat.h"</span> <span class="preprocessor">#include "graphicsscene.h"</span> <span class="preprocessor">#include "animationmanager.h"</span> <span class="preprocessor">#include "qanimationstate.h"</span> <span class="preprocessor">#include <QtCore/QPropertyAnimation></span> <span class="preprocessor">#include <QtCore/QStateMachine></span> <span class="preprocessor">#include <QtCore/QFinalState></span> Torpedo<span class="operator">::</span>Torpedo() : PixmapItem(<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromLatin1(<span class="string">"torpedo"</span>)<span class="operator">,</span>GraphicsScene<span class="operator">::</span>Big)<span class="operator">,</span> currentSpeed(<span class="number">0</span>) { setZValue(<span class="number">2</span>); } <span class="type">void</span> Torpedo<span class="operator">::</span>launch() { <span class="type"><a href="../qtcore/qpropertyanimation.html">QPropertyAnimation</a></span> <span class="operator">*</span>launchAnimation <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qpropertyanimation.html">QPropertyAnimation</a></span>(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"pos"</span>); AnimationManager<span class="operator">::</span>self()<span class="operator">-</span><span class="operator">></span>registerAnimation(launchAnimation); launchAnimation<span class="operator">-</span><span class="operator">></span>setEndValue(<span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span>(x()<span class="operator">,</span>qobject_cast<span class="operator"><</span>GraphicsScene <span class="operator">*</span><span class="operator">></span>(scene())<span class="operator">-</span><span class="operator">></span>sealLevel() <span class="operator">-</span> <span class="number">15</span>)); launchAnimation<span class="operator">-</span><span class="operator">></span>setEasingCurve(<span class="type"><a href="../qtcore/qeasingcurve.html">QEasingCurve</a></span><span class="operator">::</span>InQuad); launchAnimation<span class="operator">-</span><span class="operator">></span>setDuration(y()<span class="operator">/</span>currentSpeed<span class="operator">*</span><span class="number">10</span>); connect(launchAnimation<span class="operator">,</span>SIGNAL(valueChanged(<span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>))<span class="operator">,</span><span class="keyword">this</span><span class="operator">,</span>SLOT(onAnimationLaunchValueChanged(<span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>))); connect(<span class="keyword">this</span><span class="operator">,</span>SIGNAL(torpedoExploded())<span class="operator">,</span> launchAnimation<span class="operator">,</span> SLOT(stop())); <span class="comment">//We setup the state machine of the torpedo</span> <span class="type"><a href="../qtcore/qstatemachine.html">QStateMachine</a></span> <span class="operator">*</span>machine <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstatemachine.html">QStateMachine</a></span>(<span class="keyword">this</span>); <span class="comment">//This state is when the launch animation is playing</span> <span class="type">QAnimationState</span> <span class="operator">*</span>launched <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QAnimationState</span>(machine); launched<span class="operator">-</span><span class="operator">></span>setAnimation(launchAnimation); <span class="comment">//End</span> <span class="type"><a href="../qtcore/qfinalstate.html">QFinalState</a></span> <span class="operator">*</span>final <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qfinalstate.html">QFinalState</a></span>(machine); machine<span class="operator">-</span><span class="operator">></span>setInitialState(launched); <span class="comment">//### Add a nice animation when the torpedo is destroyed</span> launched<span class="operator">-</span><span class="operator">></span>addTransition(<span class="keyword">this</span><span class="operator">,</span> SIGNAL(torpedoExploded())<span class="operator">,</span>final); <span class="comment">//If the animation is finished, then we move to the final state</span> launched<span class="operator">-</span><span class="operator">></span>addTransition(launched<span class="operator">,</span> SIGNAL(animationFinished())<span class="operator">,</span> final); <span class="comment">//The machine has finished to be executed, then the boat is dead</span> connect(machine<span class="operator">,</span>SIGNAL(finished())<span class="operator">,</span><span class="keyword">this</span><span class="operator">,</span> SIGNAL(torpedoExecutionFinished())); machine<span class="operator">-</span><span class="operator">></span>start(); } <span class="type">void</span> Torpedo<span class="operator">::</span>setCurrentSpeed(<span class="type">int</span> speed) { <span class="keyword">if</span> (speed <span class="operator"><</span> <span class="number">0</span>) { <a href="../qtcore/qtglobal.html#qWarning">qWarning</a>(<span class="string">"Torpedo::setCurrentSpeed : The speed is invalid"</span>); <span class="keyword">return</span>; } currentSpeed <span class="operator">=</span> speed; } <span class="type">void</span> Torpedo<span class="operator">::</span>onAnimationLaunchValueChanged(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> <span class="operator">&</span>) { foreach (<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>item <span class="operator">,</span> collidingItems(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>IntersectsItemBoundingRect)) { <span class="keyword">if</span> (Boat <span class="operator">*</span>b <span class="operator">=</span> qgraphicsitem_cast<span class="operator"><</span>Boat<span class="operator">*</span><span class="operator">></span>(item)) b<span class="operator">-</span><span class="operator">></span>destroy(); } } <span class="type">void</span> Torpedo<span class="operator">::</span>destroy() { <span class="keyword">emit</span> torpedoExploded(); } </pre> </div> <!-- @@@animation/sub-attaq/torpedo.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>