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<h1 class="title">qanimationstate.cpp Example File</h1>
<span class="small-subtitle">demos/sub-attaq/qanimationstate.cpp</span>
<!-- $$$demos/sub-attaq/qanimationstate.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
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** http://www.gnu.org/copyleft/gpl.html.
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****************************************************************************/</span>
<span class="preprocessor">#include "qanimationstate.h"</span>
<span class="preprocessor">#include <QtCore/qstate.h></span>
<span class="comment">/*!
\class QAnimationState
\brief The QAnimationState class provides state that handle an animation and emit
a signal when this animation is finished.
\ingroup statemachine
QAnimationState provides a state that handle an animation. It will start this animation
when the state is entered and stop it when it is leaved. When the animation has finished the
state emit animationFinished signal.
QAnimationState is part of \l{The State Machine Framework}.
\code
QStateMachine machine;
QAnimationState *s = new QAnimationState(machine->rootState());
QPropertyAnimation *animation = new QPropertyAnimation(obj, "pos");
s->setAnimation(animation);
QState *s2 = new QState(machine->rootState());
s->addTransition(s, SIGNAL(animationFinished()), s2);
machine.start();
\endcode
\sa QState, {The Animation Framework}
*/</span>
<span class="preprocessor">#ifndef QT_NO_ANIMATION</span>
<span class="comment">/*!
Constructs a new state with the given \a parent state.
*/</span>
<span class="type">QAnimationState</span><span class="operator">::</span><span class="type">QAnimationState</span>(<span class="type"><a href="qstate.html">QState</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qstate.html">QState</a></span>(parent)<span class="operator">,</span> m_animation(<span class="number">0</span>)
{
}
<span class="comment">/*!
Destroys the animation state.
*/</span>
<span class="type">QAnimationState</span><span class="operator">::</span><span class="operator">~</span><span class="type">QAnimationState</span>()
{
}
<span class="comment">/*!
Set an \a animation for this QAnimationState. If an animation was previously handle by this
state then it won't emit animationFinished for the old animation. The QAnimationState doesn't
take the ownership of the animation.
*/</span>
<span class="type">void</span> <span class="type">QAnimationState</span><span class="operator">::</span>setAnimation(<span class="type"><a href="qabstractanimation.html">QAbstractAnimation</a></span> <span class="operator">*</span>animation)
{
<span class="keyword">if</span> (animation <span class="operator">=</span><span class="operator">=</span> m_animation)
<span class="keyword">return</span>;
<span class="comment">//Disconnect from the previous animation if exist</span>
<span class="keyword">if</span>(m_animation)
disconnect(m_animation<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SIGNAL(animationFinished()));
m_animation <span class="operator">=</span> animation;
<span class="keyword">if</span> (m_animation) {
<span class="comment">//connect the new animation</span>
connect(m_animation<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SIGNAL(animationFinished()));
}
}
<span class="comment">/*!
Returns the animation handle by this animation state, or 0 if there is no animation.
*/</span>
<span class="type"><a href="qabstractanimation.html">QAbstractAnimation</a></span><span class="operator">*</span> <span class="type">QAnimationState</span><span class="operator">::</span>animation() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_animation;
}
<span class="comment">/*!
\reimp
*/</span>
<span class="type">void</span> <span class="type">QAnimationState</span><span class="operator">::</span>onEntry(<span class="type"><a href="qevent.html">QEvent</a></span> <span class="operator">*</span>)
{
<span class="keyword">if</span> (m_animation)
m_animation<span class="operator">-</span><span class="operator">></span>start();
}
<span class="comment">/*!
\reimp
*/</span>
<span class="type">void</span> <span class="type">QAnimationState</span><span class="operator">::</span>onExit(<span class="type"><a href="qevent.html">QEvent</a></span> <span class="operator">*</span>)
{
<span class="keyword">if</span> (m_animation)
m_animation<span class="operator">-</span><span class="operator">></span>stop();
}
<span class="comment">/*!
\reimp
*/</span>
<span class="type">bool</span> <span class="type">QAnimationState</span><span class="operator">::</span>event(<span class="type"><a href="qevent.html">QEvent</a></span> <span class="operator">*</span>e)
{
<span class="keyword">return</span> <span class="type"><a href="qstate.html">QState</a></span><span class="operator">::</span>event(e);
}
<span class="preprocessor">#endif</span></pre>
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<!-- @@@demos/sub-attaq/qanimationstate.cpp -->
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