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<h1 class="title">QAbstractState Class Reference</h1>
<!-- $$$QAbstractState-brief -->
<p>The QAbstractState class is the base class of states of a <a href="qstatemachine.html">QStateMachine</a>. <a href="#details">More...</a></p>
<!-- @@@QAbstractState -->
<pre class="cpp"> <span class="preprocessor">#include &lt;QAbstractState&gt;</span></pre><p><b>Inherits: </b><a href="qobject.html">QObject</a>.</p>
<p><b>Inherited by: </b><a href="qfinalstate.html">QFinalState</a>, <a href="qhistorystate.html">QHistoryState</a>, and <a href="qstate.html">QState</a>.</p>
<p>This class was introduced in Qt 4.6.</p>
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<li><a href="qabstractstate-members.html">List of all members, including inherited members</a></li>
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<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#dtor.QAbstractState">~QAbstractState</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QStateMachine * </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#machine">machine</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QState * </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#parentState">parentState</a></b> () const</td></tr>
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<li class="fn">29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
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<h2>Signals</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#entered">entered</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#exited">exited</a></b> ()</td></tr>
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<h2>Protected Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#QAbstractState">QAbstractState</a></b> ( QState * <i>parent</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#onEntry">onEntry</a></b> ( QEvent * <i>event</i> ) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#onExit">onExit</a></b> ( QEvent * <i>event</i> ) = 0</td></tr>
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<h2>Reimplemented Protected Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qabstractstate.html#event">event</a></b> ( QEvent * <i>e</i> )</td></tr>
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<li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
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<h3>Additional Inherited Members</h3>
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<li class="fn">1 property inherited from <a href="qobject.html#properties">QObject</a></li>
<li class="fn">1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li>
<li class="fn">7 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
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<a name="details"></a>
<!-- $$$QAbstractState-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QAbstractState class is the base class of states of a <a href="qstatemachine.html">QStateMachine</a>.</p>
<p>The QAbstractState class is the abstract base class of states that are part of a <a href="qstatemachine.html">QStateMachine</a>. It defines the interface that all state objects have in common. QAbstractState is part of <a href="statemachine-api.html">The State Machine Framework</a>.</p>
<p>The <a href="qabstractstate.html#entered">entered</a>() signal is emitted when the state has been entered. The <a href="qabstractstate.html#exited">exited</a>() signal is emitted when the state has been exited.</p>
<p>The <a href="qabstractstate.html#parentState">parentState</a>() function returns the state's parent state. The <a href="qabstractstate.html#machine">machine</a>() function returns the state machine that the state is part of.</p>
<a name="subclassing"></a>
<h3>Subclassing</h3>
<p>The <a href="qabstractstate.html#onEntry">onEntry</a>() function is called when the state is entered; reimplement this function to perform custom processing when the state is entered.</p>
<p>The <a href="qabstractstate.html#onExit">onExit</a>() function is called when the state is exited; reimplement this function to perform custom processing when the state is exited.</p>
</div>
<!-- @@@QAbstractState -->
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<h2>Member Function Documentation</h2>
<!-- $$$QAbstractState[overload1]$$$QAbstractStateQState* -->
<h3 class="fn"><a name="QAbstractState"></a>QAbstractState::<span class="name">QAbstractState</span> ( <span class="type"><a href="qstate.html">QState</a></span> * <i>parent</i> = 0 )<tt> [protected]</tt></h3>
<p>Constructs a new state with the given <i>parent</i> state.</p>
<!-- @@@QAbstractState -->
<!-- $$$~QAbstractState[overload1]$$$~QAbstractState -->
<h3 class="fn"><a name="dtor.QAbstractState"></a>QAbstractState::<span class="name">~QAbstractState</span> ()</h3>
<p>Destroys this state.</p>
<!-- @@@~QAbstractState -->
<!-- $$$entered[overload1]$$$entered -->
<h3 class="fn"><a name="entered"></a><span class="type">void</span> QAbstractState::<span class="name">entered</span> ()<tt> [signal]</tt></h3>
<p>This signal is emitted when the state has been entered (after <a href="qabstractstate.html#onEntry">onEntry</a>() has been called).</p>
<!-- @@@entered -->
<!-- $$$event[overload1]$$$eventQEvent* -->
<h3 class="fn"><a name="event"></a><span class="type">bool</span> QAbstractState::<span class="name">event</span> ( <span class="type"><a href="qevent.html">QEvent</a></span> * <i>e</i> )<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qobject.html#event">QObject::event</a>().</p>
<!-- @@@event -->
<!-- $$$exited[overload1]$$$exited -->
<h3 class="fn"><a name="exited"></a><span class="type">void</span> QAbstractState::<span class="name">exited</span> ()<tt> [signal]</tt></h3>
<p>This signal is emitted when the state has been exited (after <a href="qabstractstate.html#onExit">onExit</a>() has been called).</p>
<!-- @@@exited -->
<!-- $$$machine[overload1]$$$machine -->
<h3 class="fn"><a name="machine"></a><span class="type"><a href="qstatemachine.html">QStateMachine</a></span> * QAbstractState::<span class="name">machine</span> () const</h3>
<p>Returns the state machine that this state is part of, or 0 if the state is not part of a state machine.</p>
<!-- @@@machine -->
<!-- $$$onEntry[overload1]$$$onEntryQEvent* -->
<h3 class="fn"><a name="onEntry"></a><span class="type">void</span> QAbstractState::<span class="name">onEntry</span> ( <span class="type"><a href="qevent.html">QEvent</a></span> * <i>event</i> )<tt> [pure virtual protected]</tt></h3>
<p>This function is called when the state is entered. The given <i>event</i> is what caused the state to be entered. Reimplement this function to perform custom processing when the state is entered.</p>
<!-- @@@onEntry -->
<!-- $$$onExit[overload1]$$$onExitQEvent* -->
<h3 class="fn"><a name="onExit"></a><span class="type">void</span> QAbstractState::<span class="name">onExit</span> ( <span class="type"><a href="qevent.html">QEvent</a></span> * <i>event</i> )<tt> [pure virtual protected]</tt></h3>
<p>This function is called when the state is exited. The given <i>event</i> is what caused the state to be exited. Reimplement this function to perform custom processing when the state is exited.</p>
<!-- @@@onExit -->
<!-- $$$parentState[overload1]$$$parentState -->
<h3 class="fn"><a name="parentState"></a><span class="type"><a href="qstate.html">QState</a></span> * QAbstractState::<span class="name">parentState</span> () const</h3>
<p>Returns this state's parent state, or 0 if the state has no parent state.</p>
<!-- @@@parentState -->
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