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<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
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** 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 -->
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