<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qevent.cpp --> <title>QActionEvent Class | Qt GUI 5.9</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 5.9</td><td ><a href="qtgui-index.html">Qt GUI</a></td><td ><a href="qtgui-module.html">C++ Classes</a></td><td >QActionEvent</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</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">QActionEvent Class</h1> <!-- $$$QActionEvent-brief --> <p>The <a href="qactionevent.html">QActionEvent</a> class provides an event that is generated when a <a href="../qtwidgets/qaction.html">QAction</a> is added, removed, or changed. <a href="#details">More...</a></p> <!-- @@@QActionEvent --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QActionEvent></span> </td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += gui</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="../qtcore/qevent.html">QEvent</a></td></tr></table></div><ul> <li><a href="qactionevent-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="qactionevent.html#QActionEvent">QActionEvent</a></b>(int <i>type</i>, QAction *<i>action</i>, QAction *<i>before</i> = Q_NULLPTR)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QAction *</td><td class="memItemRight bottomAlign"><b><a href="qactionevent.html#action">action</a></b>() const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QAction *</td><td class="memItemRight bottomAlign"><b><a href="qactionevent.html#before">before</a></b>() const</td></tr> </table></div> <ul> <li class="fn">6 public functions inherited from <a href="../qtcore/qevent.html#public-functions">QEvent</a></li> </ul> <h3>Additional Inherited Members</h3> <ul> <li class="fn">1 property inherited from <a href="../qtcore/qevent.html#properties">QEvent</a></li> <li class="fn">1 static public member inherited from <a href="../qtcore/qevent.html#static-public-members">QEvent</a></li> <li class="fn">2 protected variables inherited from <a href="../qtcore/qevent.html#protected-variables">QEvent</a></li> </ul> <a name="details"></a> <!-- $$$QActionEvent-description --> <div class="descr"> <h2 id="details">Detailed Description</h2> <p>The <a href="qactionevent.html">QActionEvent</a> class provides an event that is generated when a <a href="../qtwidgets/qaction.html">QAction</a> is added, removed, or changed.</p> <p>Actions can be added to widgets using <a href="../qtwidgets/qwidget.html#addAction">QWidget::addAction</a>(). This generates an <a href="../qtcore/qevent.html#Type-enum">ActionAdded</a> event, which you can handle to provide custom behavior. For example, <a href="../qtwidgets/qtoolbar.html">QToolBar</a> reimplements <a href="../qtwidgets/qwidget.html#actionEvent">QWidget::actionEvent</a>() to create <a href="../qtwidgets/qtoolbutton.html">QToolButton</a>s for the actions.</p> </div> <p><b>See also </b><a href="../qtwidgets/qaction.html">QAction</a>, <a href="../qtwidgets/qwidget.html#addAction">QWidget::addAction</a>(), <a href="../qtwidgets/qwidget.html#removeAction">QWidget::removeAction</a>(), and <a href="../qtwidgets/qwidget.html#actions">QWidget::actions</a>().</p> <!-- @@@QActionEvent --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$QActionEvent[overload1]$$$QActionEventintQAction*QAction* --> <h3 class="fn" id="QActionEvent"><a name="QActionEvent"></a>QActionEvent::<span class="name">QActionEvent</span>(<span class="type">int</span> <i>type</i>, <span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> *<i>action</i>, <span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> *<i>before</i> = Q_NULLPTR)</h3> <p>Constructs an action event. The <i>type</i> can be <a href="../qtcore/qevent.html#Type-enum">ActionChanged</a>, <a href="../qtcore/qevent.html#Type-enum">ActionAdded</a>, or <a href="../qtcore/qevent.html#Type-enum">ActionRemoved</a>.</p> <p><i>action</i> is the action that is changed, added, or removed. If <i>type</i> is <a href="../qtcore/qevent.html#Type-enum">ActionAdded</a>, the action is to be inserted before the action <i>before</i>. If <i>before</i> is 0, the action is appended.</p> <!-- @@@QActionEvent --> <!-- $$$action[overload1]$$$action --> <h3 class="fn" id="action"><a name="action"></a><span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> *QActionEvent::<span class="name">action</span>() const</h3> <p>Returns the action that is changed, added, or removed.</p> <p><b>See also </b><a href="qactionevent.html#before">before</a>().</p> <!-- @@@action --> <!-- $$$before[overload1]$$$before --> <h3 class="fn" id="before"><a name="before"></a><span class="type"><a href="../qtwidgets/qaction.html">QAction</a></span> *QActionEvent::<span class="name">before</span>() const</h3> <p>If <a href="../qtcore/qevent.html#type">type</a>() is <a href="../qtcore/qevent.html#Type-enum">ActionAdded</a>, returns the action that should appear before <a href="qactionevent.html#action">action</a>(). If this function returns 0, the action should be appended to already existing actions on the same widget.</p> <p><b>See also </b><a href="qactionevent.html#action">action</a>() and <a href="../qtwidgets/qwidget.html#actions">QWidget::actions</a>().</p> <!-- @@@before --> </div> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>