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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qtcore.html">QtCore</a></li> <li>QSignalTransition</li> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#properties">Properties</a></li> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#protected-functions">Protected Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <h1 class="title">QSignalTransition Class Reference</h1> <!-- $$$QSignalTransition-brief --> <p>The QSignalTransition class provides a transition based on a Qt signal. <a href="#details">More...</a></p> <!-- @@@QSignalTransition --> <pre class="cpp"> <span class="preprocessor">#include <QSignalTransition></span></pre><p><b>Inherits: </b><a href="qabstracttransition.html">QAbstractTransition</a>.</p> <p>This class was introduced in Qt 4.6.</p> <ul> <li><a href="qsignaltransition-members.html">List of all members, including inherited members</a></li> </ul> <a name="properties"></a> <h2>Properties</h2> <ul> <li class="fn"><b><a href="qsignaltransition.html#senderObject-prop">senderObject</a></b> : QObject *</li> <li class="fn"><b><a href="qsignaltransition.html#signal-prop">signal</a></b> : QByteArray</li> </ul> <ul> <li class="fn">3 properties inherited from <a href="qabstracttransition.html#properties">QAbstractTransition</a></li> <li class="fn">1 property inherited from <a href="qobject.html#properties">QObject</a></li> </ul> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#QSignalTransition">QSignalTransition</a></b> ( QState * <i>sourceState</i> = 0 )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#QSignalTransition-2">QSignalTransition</a></b> ( QObject * <i>sender</i>, const char * <i>signal</i>, QState * <i>sourceState</i> = 0 )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#dtor.QSignalTransition">~QSignalTransition</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QObject * </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#senderObject-prop">senderObject</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#senderObject-prop">setSenderObject</a></b> ( QObject * <i>sender</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#signal-prop">setSignal</a></b> ( const QByteArray & <i>signal</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QByteArray </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#signal-prop">signal</a></b> () const</td></tr> </table> <ul> <li class="fn">9 public functions inherited from <a href="qabstracttransition.html#public-functions">QAbstractTransition</a></li> <li class="fn">29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li> </ul> <a name="reimplemented-protected-functions"></a> <h2>Reimplemented Protected Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#event">event</a></b> ( QEvent * <i>e</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#eventTest">eventTest</a></b> ( QEvent * <i>event</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qsignaltransition.html#onTransition">onTransition</a></b> ( QEvent * <i>event</i> )</td></tr> </table> <ul> <li class="fn">3 protected functions inherited from <a href="qabstracttransition.html#protected-functions">QAbstractTransition</a></li> <li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li> </ul> <h3>Additional Inherited Members</h3> <ul> <li class="fn">1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li> <li class="fn">1 signal inherited from <a href="qabstracttransition.html#signals">QAbstractTransition</a></li> <li class="fn">1 signal inherited from <a href="qobject.html#signals">QObject</a></li> <li class="fn">7 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li> <li class="fn">3 protected functions inherited from <a href="qabstracttransition.html#protected-functions">QAbstractTransition</a></li> <li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li> </ul> <a name="details"></a> <!-- $$$QSignalTransition-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The QSignalTransition class provides a transition based on a Qt signal.</p> <p>Typically you would use the overload of <a href="qstate.html#addTransition">QState::addTransition</a>() that takes a sender and signal as arguments, rather than creating QSignalTransition objects directly. QSignalTransition is part of <a href="statemachine-api.html">The State Machine Framework</a>.</p> <p>You can subclass QSignalTransition and reimplement <a href="qsignaltransition.html#eventTest">eventTest</a>() to make a signal transition conditional; the event object passed to <a href="qsignaltransition.html#eventTest">eventTest</a>() will be a <a href="qstatemachine-signalevent.html">QStateMachine::SignalEvent</a> object. Example:</p> <pre class="cpp"> <span class="keyword">class</span> CheckedTransition : <span class="keyword">public</span> <span class="type">QSignalTransition</span> { <span class="keyword">public</span>: CheckedTransition(<span class="type"><a href="qcheckbox.html">QCheckBox</a></span> <span class="operator">*</span>check) : <span class="type">QSignalTransition</span>(check<span class="operator">,</span> SIGNAL(stateChanged(<span class="type">int</span>))) {} <span class="keyword">protected</span>: <span class="type">bool</span> eventTest(<span class="type"><a href="qevent.html">QEvent</a></span> <span class="operator">*</span>e) { <span class="keyword">if</span> (<span class="operator">!</span><span class="type">QSignalTransition</span><span class="operator">::</span>eventTest(e)) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="type"><a href="qstatemachine.html">QStateMachine</a></span><span class="operator">::</span>SignalEvent <span class="operator">*</span>se <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qstatemachine.html">QStateMachine</a></span><span class="operator">::</span>SignalEvent<span class="operator">*</span><span class="operator">></span>(e); <span class="keyword">return</span> (se<span class="operator">-</span><span class="operator">></span>arguments()<span class="operator">.</span>at(<span class="number">0</span>)<span class="operator">.</span>toInt() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Checked); } }; <span class="operator">.</span><span class="operator">.</span><span class="operator">.</span> <span class="type"><a href="qcheckbox.html">QCheckBox</a></span> <span class="operator">*</span>check <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcheckbox.html">QCheckBox</a></span>(); check<span class="operator">-</span><span class="operator">></span>setTristate(<span class="keyword">true</span>); <span class="type"><a href="qstate.html">QState</a></span> <span class="operator">*</span>s1 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstate.html">QState</a></span>(); <span class="type"><a href="qstate.html">QState</a></span> <span class="operator">*</span>s2 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qstate.html">QState</a></span>(); CheckedTransition <span class="operator">*</span>t1 <span class="operator">=</span> <span class="keyword">new</span> CheckedTransition(check); t1<span class="operator">-</span><span class="operator">></span><a href="qabstracttransition.html#targetState-prop">setTargetState</a>(s2); s1<span class="operator">-</span><span class="operator">></span>addTransition(t1);</pre> </div> <!-- @@@QSignalTransition --> <div class="prop"> <h2>Property Documentation</h2> <!-- $$$senderObject-prop$$$senderObject$$$setSenderObjectQObject* --> <h3 class="fn"><a name="senderObject-prop"></a><span class="name">senderObject</span> : <span class="type"><a href="qobject.html">QObject</a></span> *</h3> <p>This property holds the sender object that this signal transition is associated with.</p> <p><b>Access functions:</b></p> <table class="alignedsummary"> <tr><td class="memItemLeft topAlign rightAlign"> QObject * </td><td class="memItemRight bottomAlign"><span class="name"><b>senderObject</b></span> () const</td></tr> <tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setSenderObject</b></span> ( QObject * <i>sender</i> )</td></tr> </table> <!-- @@@senderObject --> <!-- $$$signal-prop$$$signal$$$setSignalconstQByteArray& --> <h3 class="fn"><a name="signal-prop"></a><span class="name">signal</span> : <span class="type"><a href="qbytearray.html">QByteArray</a></span></h3> <p>This property holds the signal that this signal transition is associated with.</p> <p><b>Access functions:</b></p> <table class="alignedsummary"> <tr><td class="memItemLeft topAlign rightAlign"> QByteArray </td><td class="memItemRight bottomAlign"><span class="name"><b>signal</b></span> () const</td></tr> <tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setSignal</b></span> ( const QByteArray & <i>signal</i> )</td></tr> </table> <!-- @@@signal --> </div> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$QSignalTransition[overload1]$$$QSignalTransitionQState* --> <h3 class="fn"><a name="QSignalTransition"></a>QSignalTransition::<span class="name">QSignalTransition</span> ( <span class="type"><a href="qstate.html">QState</a></span> * <i>sourceState</i> = 0 )</h3> <p>Constructs a new signal transition with the given <i>sourceState</i>.</p> <!-- @@@QSignalTransition --> <!-- $$$QSignalTransition$$$QSignalTransitionQObject*constchar*QState* --> <h3 class="fn"><a name="QSignalTransition-2"></a>QSignalTransition::<span class="name">QSignalTransition</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>sender</i>, const <span class="type">char</span> * <i>signal</i>, <span class="type"><a href="qstate.html">QState</a></span> * <i>sourceState</i> = 0 )</h3> <p>Constructs a new signal transition associated with the given <i>signal</i> of the given <i>sender</i>, and with the given <i>sourceState</i>.</p> <!-- @@@QSignalTransition --> <!-- $$$~QSignalTransition[overload1]$$$~QSignalTransition --> <h3 class="fn"><a name="dtor.QSignalTransition"></a>QSignalTransition::<span class="name">~QSignalTransition</span> ()</h3> <p>Destroys this signal transition.</p> <!-- @@@~QSignalTransition --> <!-- $$$event[overload1]$$$eventQEvent* --> <h3 class="fn"><a name="event"></a><span class="type">bool</span> QSignalTransition::<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 --> <!-- $$$eventTest[overload1]$$$eventTestQEvent* --> <h3 class="fn"><a name="eventTest"></a><span class="type">bool</span> QSignalTransition::<span class="name">eventTest</span> ( <span class="type"><a href="qevent.html">QEvent</a></span> * <i>event</i> )<tt> [virtual protected]</tt></h3> <p>Reimplemented from <a href="qabstracttransition.html#eventTest">QAbstractTransition::eventTest</a>().</p> <p>The default implementation returns true if the <i>event</i> is a <a href="qstatemachine-signalevent.html">QStateMachine::SignalEvent</a> object and the event's sender and signal index match this transition, and returns false otherwise.</p> <!-- @@@eventTest --> <!-- $$$onTransition[overload1]$$$onTransitionQEvent* --> <h3 class="fn"><a name="onTransition"></a><span class="type">void</span> QSignalTransition::<span class="name">onTransition</span> ( <span class="type"><a href="qevent.html">QEvent</a></span> * <i>event</i> )<tt> [virtual protected]</tt></h3> <p>Reimplemented from <a href="qabstracttransition.html#onTransition">QAbstractTransition::onTransition</a>().</p> <!-- @@@onTransition --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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