<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qgraphicssceneevent.cpp --> <title>QGraphicsSceneHelpEvent Class | Qt Widgets 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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-module.html">C++ Classes</a></td><td >QGraphicsSceneHelpEvent</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-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">QGraphicsSceneHelpEvent Class</h1> <!-- $$$QGraphicsSceneHelpEvent-brief --> <p>The <a href="qgraphicsscenehelpevent.html">QGraphicsSceneHelpEvent</a> class provides events when a tooltip is requested. <a href="#details">More...</a></p> <!-- @@@QGraphicsSceneHelpEvent --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QGraphicsSceneHelpEvent></span> </td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += widgets</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 4.2</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="qgraphicssceneevent.html">QGraphicsSceneEvent</a></td></tr></table></div><ul> <li><a href="qgraphicsscenehelpevent-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"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsscenehelpevent.html#dtor.QGraphicsSceneHelpEvent">~QGraphicsSceneHelpEvent</a></b>()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QPointF </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsscenehelpevent.html#scenePos">scenePos</a></b>() const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QPoint </td><td class="memItemRight bottomAlign"><b><a href="qgraphicsscenehelpevent.html#screenPos">screenPos</a></b>() const</td></tr> </table></div> <ul> <li class="fn">1 public function inherited from <a href="qgraphicssceneevent.html#public-functions">QGraphicsSceneEvent</a></li> <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> </ul> <a name="details"></a> <!-- $$$QGraphicsSceneHelpEvent-description --> <div class="descr"> <h2 id="details">Detailed Description</h2> <p>The <a href="qgraphicsscenehelpevent.html">QGraphicsSceneHelpEvent</a> class provides events when a tooltip is requested.</p> <p>When a <a href="qgraphicsview.html">QGraphicsView</a> receives a <a href="../qtcore/qevent.html">QEvent</a> of type <a href="../qtcore/qevent.html#Type-enum">QEvent::ToolTip</a>, it creates a <a href="qgraphicsscenehelpevent.html">QGraphicsSceneHelpEvent</a>, which is forwarded to the scene. You can set a tooltip on a <a href="qgraphicsitem.html">QGraphicsItem</a> with <a href="qgraphicsitem.html#setToolTip">setToolTip()</a>; by default <a href="qgraphicsscene.html">QGraphicsScene</a> displays the tooltip of the <a href="qgraphicsitem.html">QGraphicsItem</a> with the highest z-value (i.e, the top-most item) under the mouse position.</p> <p><a href="qgraphicsview.html">QGraphicsView</a> does not forward events when <a href="qwhatsthis.html">"What's This"</a> and <a href="../qtgui/qstatustipevent.html">status tip</a> help is requested. If you need this, you can reimplement <a href="qgraphicsview.html#viewportEvent">QGraphicsView::viewportEvent</a>() and forward <a href="../qtgui/qstatustipevent.html">QStatusTipEvent</a> events and <a href="../qtcore/qevent.html">QEvents</a> of type <a href="../qtcore/qevent.html#Type-enum">QEvent::WhatsThis</a> to the scene.</p> </div> <p><b>See also </b><a href="../qtcore/qevent.html">QEvent</a>.</p> <!-- @@@QGraphicsSceneHelpEvent --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$~QGraphicsSceneHelpEvent[overload1]$$$~QGraphicsSceneHelpEvent --> <h3 class="fn" id="dtor.QGraphicsSceneHelpEvent"><a name="dtor.QGraphicsSceneHelpEvent"></a><code>[virtual] </code>QGraphicsSceneHelpEvent::<span class="name">~QGraphicsSceneHelpEvent</span>()</h3> <p>Destroys the event.</p> <!-- @@@~QGraphicsSceneHelpEvent --> <!-- $$$scenePos[overload1]$$$scenePos --> <h3 class="fn" id="scenePos"><a name="scenePos"></a><span class="type"><a href="../qtcore/qpointf.html">QPointF</a></span> QGraphicsSceneHelpEvent::<span class="name">scenePos</span>() const</h3> <p>Returns the position of the mouse cursor in scene coordinates at the moment the help event was sent.</p> <p><b>See also </b><a href="qgraphicsscenehelpevent.html#screenPos">screenPos</a>().</p> <!-- @@@scenePos --> <!-- $$$screenPos[overload1]$$$screenPos --> <h3 class="fn" id="screenPos"><a name="screenPos"></a><span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span> QGraphicsSceneHelpEvent::<span class="name">screenPos</span>() const</h3> <p>Returns the position of the mouse cursor in screen coordinates at the moment the help event was sent.</p> <p><b>See also </b><a href="qgraphicsscenehelpevent.html#scenePos">scenePos</a>().</p> <!-- @@@screenPos --> </div> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 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>