<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qeventloop.cpp --> <title>QEventLoopLocker Class | Qt Core 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <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 >QEventLoopLocker</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> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">QEventLoopLocker Class</h1> <!-- $$$QEventLoopLocker-brief --> <p>The <a href="qeventlooplocker.html">QEventLoopLocker</a> class provides a means to quit an event loop when it is no longer needed. <a href="#details">More...</a></p> <!-- @@@QEventLoopLocker --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QEventLoopLocker></span> </td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += core</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 5.0</td></tr></table></div><ul> <li><a href="qeventlooplocker-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-functions"></a> <h2 id="public-functions">Public Functions</h2> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qeventlooplocker.html#QEventLoopLocker">QEventLoopLocker</a></b>()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qeventlooplocker.html#QEventLoopLocker-1">QEventLoopLocker</a></b>(QEventLoop *<i>loop</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qeventlooplocker.html#QEventLoopLocker-2">QEventLoopLocker</a></b>(QThread *<i>thread</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qeventlooplocker.html#dtor.QEventLoopLocker">~QEventLoopLocker</a></b>()</td></tr> </table></div> <a name="details"></a> <!-- $$$QEventLoopLocker-description --> <div class="descr"> <h2 id="details">Detailed Description</h2> <p>The <a href="qeventlooplocker.html">QEventLoopLocker</a> class provides a means to quit an event loop when it is no longer needed.</p> <p>The <a href="qeventlooplocker.html">QEventLoopLocker</a> operates on particular objects - either a <a href="qcoreapplication.html">QCoreApplication</a> instance, a <a href="qeventloop.html">QEventLoop</a> instance or a <a href="qthread.html">QThread</a> instance.</p> <p>This makes it possible to, for example, run a batch of jobs with an event loop and exit that event loop after the last job is finished. That is accomplished by keeping a <a href="qeventlooplocker.html">QEventLoopLocker</a> with each job instance.</p> <p>The variant which operates on <a href="qcoreapplication.html">QCoreApplication</a> makes it possible to finish asynchronously running jobs after the last gui window has been closed. This can be useful for example for running a job which uploads data to a network.</p> </div> <p><b>See also </b><a href="qeventloop.html">QEventLoop</a> and <a href="qcoreapplication.html">QCoreApplication</a>.</p> <!-- @@@QEventLoopLocker --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$QEventLoopLocker[overload1]$$$QEventLoopLocker --> <h3 class="fn" id="QEventLoopLocker"><a name="QEventLoopLocker"></a>QEventLoopLocker::<span class="name">QEventLoopLocker</span>()</h3> <p>Creates an event locker operating on the <a href="qcoreapplication.html">QCoreApplication</a>.</p> <p>The application will quit when there are no more QEventLoopLockers operating on it.</p> <p><b>See also </b><a href="qcoreapplication.html#quit">QCoreApplication::quit</a>() and <a href="qcoreapplication.html#quitLockEnabled-prop">QCoreApplication::isQuitLockEnabled</a>().</p> <!-- @@@QEventLoopLocker --> <!-- $$$QEventLoopLocker$$$QEventLoopLockerQEventLoop* --> <h3 class="fn" id="QEventLoopLocker-1"><a name="QEventLoopLocker-1"></a>QEventLoopLocker::<span class="name">QEventLoopLocker</span>(<span class="type"><a href="qeventloop.html">QEventLoop</a></span> *<i>loop</i>)</h3> <p>Creates an event locker operating on the <i>loop</i>.</p> <p>This particular <a href="qeventloop.html">QEventLoop</a> will quit when there are no more QEventLoopLockers operating on it.</p> <p><b>See also </b><a href="qeventloop.html#quit">QEventLoop::quit</a>().</p> <!-- @@@QEventLoopLocker --> <!-- $$$QEventLoopLocker$$$QEventLoopLockerQThread* --> <h3 class="fn" id="QEventLoopLocker-2"><a name="QEventLoopLocker-2"></a>QEventLoopLocker::<span class="name">QEventLoopLocker</span>(<span class="type"><a href="qthread.html">QThread</a></span> *<i>thread</i>)</h3> <p>Creates an event locker operating on the <i>thread</i>.</p> <p>This particular <a href="qthread.html">QThread</a> will quit when there are no more QEventLoopLockers operating on it.</p> <p><b>See also </b><a href="qthread.html#quit">QThread::quit</a>().</p> <!-- @@@QEventLoopLocker --> <!-- $$$~QEventLoopLocker[overload1]$$$~QEventLoopLocker --> <h3 class="fn" id="dtor.QEventLoopLocker"><a name="dtor.QEventLoopLocker"></a>QEventLoopLocker::<span class="name">~QEventLoopLocker</span>()</h3> <p>Destroys this event loop locker object</p> <!-- @@@~QEventLoopLocker --> </div> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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