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<td >Qt 5.12</td><td ><a href="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-module.html">C++ Classes</a></td><td >QBasicTimer</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qtcore-index.html">Qt 5.12.6 Reference Documentation</a></td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QBasicTimer Class</h1>
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<p>The <a href="qbasictimer.html">QBasicTimer</a> class provides timer events for objects. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QBasicTimer></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += core</td></tr></table></div><ul>
<li><a href="qbasictimer-members.html">List of all members, including inherited members</a></li>
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<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qbasictimer.html#QBasicTimer">QBasicTimer</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qbasictimer.html#dtor.QBasicTimer">~QBasicTimer</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qbasictimer.html#isActive">isActive</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qbasictimer.html#start">start</a></b>(int <i>msec</i>, QObject *<i>object</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qbasictimer.html#start-1">start</a></b>(int <i>msec</i>, Qt::TimerType <i>timerType</i>, QObject *<i>obj</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qbasictimer.html#stop">stop</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qbasictimer.html#timerId">timerId</a></b>() const</td></tr>
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<h2 id="details">Detailed Description</h2>
<p>The <a href="qbasictimer.html">QBasicTimer</a> class provides timer events for objects.</p>
<p>This is a fast, lightweight, and low-level class used by Qt internally. We recommend using the higher-level <a href="qtimer.html">QTimer</a> class rather than this class if you want to use timers in your applications. Note that this timer is a repeating timer that will send subsequent timer events unless the <a href="qbasictimer.html#stop">stop</a>() function is called.</p>
<p>To use this class, create a <a href="qbasictimer.html">QBasicTimer</a>, and call its <a href="qbasictimer.html#start">start</a>() function with a timeout interval and with a pointer to a <a href="qobject.html">QObject</a> subclass. When the timer times out it will send a timer event to the <a href="qobject.html">QObject</a> subclass. The timer can be stopped at any time using <a href="qbasictimer.html#stop">stop</a>(). <a href="qbasictimer.html#isActive">isActive</a>() returns <code>true</code> for a timer that is running; i.e. it has been started, has not reached the timeout time, and has not been stopped. The timer's ID can be retrieved using <a href="qbasictimer.html#timerId">timerId</a>().</p>
<p>The <a href="../qtwidgets/qtwidgets-widgets-wiggly-example.html">Wiggly</a> example uses <a href="qbasictimer.html">QBasicTimer</a> to repaint a widget at regular intervals.</p>
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<p><b>See also </b><a href="qtimer.html">QTimer</a>, <a href="qtimerevent.html">QTimerEvent</a>, <a href="qobject.html#timerEvent">QObject::timerEvent</a>(), <a href="timers.html">Timers</a>, and <a href="../qtwidgets/qtwidgets-widgets-wiggly-example.html">Wiggly Example</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="QBasicTimer"><a name="QBasicTimer"></a>QBasicTimer::<span class="name">QBasicTimer</span>()</h3>
<p>Contructs a basic timer.</p>
<p><b>See also </b><a href="qbasictimer.html#start">start</a>().</p>
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<h3 class="fn" id="dtor.QBasicTimer"><a name="dtor.QBasicTimer"></a>QBasicTimer::<span class="name">~QBasicTimer</span>()</h3>
<p>Destroys the basic timer.</p>
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<h3 class="fn" id="isActive"><a name="isActive"></a><span class="type">bool</span> QBasicTimer::<span class="name">isActive</span>() const</h3>
<p>Returns <code>true</code> if the timer is running and has not been stopped; otherwise returns <code>false</code>.</p>
<p><b>See also </b><a href="qbasictimer.html#start">start</a>() and <a href="qbasictimer.html#stop">stop</a>().</p>
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<h3 class="fn" id="start"><a name="start"></a><span class="type">void</span> QBasicTimer::<span class="name">start</span>(<span class="type">int</span> <i>msec</i>, <span class="type"><a href="qobject.html">QObject</a></span> *<i>object</i>)</h3>
<p>Starts (or restarts) the timer with a <i>msec</i> milliseconds timeout. The timer will be a <a href="qt.html#TimerType-enum">Qt::CoarseTimer</a>. See <a href="qt.html#TimerType-enum">Qt::TimerType</a> for information on the different timer types.</p>
<p>The given <i>object</i> will receive timer events.</p>
<p><b>See also </b><a href="qbasictimer.html#stop">stop</a>(), <a href="qbasictimer.html#isActive">isActive</a>(), <a href="qobject.html#timerEvent">QObject::timerEvent</a>(), and <a href="qt.html#TimerType-enum">Qt::CoarseTimer</a>.</p>
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<h3 class="fn" id="start-1"><a name="start-1"></a><span class="type">void</span> QBasicTimer::<span class="name">start</span>(<span class="type">int</span> <i>msec</i>, <span class="type"><a href="qt.html#TimerType-enum">Qt::TimerType</a></span> <i>timerType</i>, <span class="type"><a href="qobject.html">QObject</a></span> *<i>obj</i>)</h3>
<p>This is an overloaded function.</p>
<p>Starts (or restarts) the timer with a <i>msec</i> milliseconds timeout and the given <i>timerType</i>. See <a href="qt.html#TimerType-enum">Qt::TimerType</a> for information on the different timer types.</p>
<p><i>obj</i> will receive timer events.</p>
<p><b>See also </b><a href="qbasictimer.html#stop">stop</a>(), <a href="qbasictimer.html#isActive">isActive</a>(), <a href="qobject.html#timerEvent">QObject::timerEvent</a>(), and <a href="qt.html#TimerType-enum">Qt::TimerType</a>.</p>
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<h3 class="fn" id="stop"><a name="stop"></a><span class="type">void</span> QBasicTimer::<span class="name">stop</span>()</h3>
<p>Stops the timer.</p>
<p><b>See also </b><a href="qbasictimer.html#start">start</a>() and <a href="qbasictimer.html#isActive">isActive</a>().</p>
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<h3 class="fn" id="timerId"><a name="timerId"></a><span class="type">int</span> QBasicTimer::<span class="name">timerId</span>() const</h3>
<p>Returns the timer's ID.</p>
<p><b>See also </b><a href="qtimerevent.html#timerId">QTimerEvent::timerId</a>().</p>
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