<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>elidedlabel.cpp Example File | 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-widgets-elidedlabel-example.html">Elided Label Example</a></td><td >elidedlabel.cpp Example File</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="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">elidedlabel.cpp Example File</h1> <span class="subtitle">widgets/elidedlabel/elidedlabel.cpp</span> <!-- $$$widgets/elidedlabel/elidedlabel.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtCore module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "elidedlabel.h"</span> <span class="preprocessor">#include <QPainter></span> <span class="preprocessor">#include <QTextLayout></span> <span class="preprocessor">#include <QDebug></span> ElidedLabel<span class="operator">::</span>ElidedLabel(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>text<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qframe.html">QFrame</a></span>(parent) <span class="operator">,</span> elided(<span class="keyword">false</span>) <span class="operator">,</span> content(text) { setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Expanding<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Preferred); } <span class="type">void</span> ElidedLabel<span class="operator">::</span>setText(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>newText) { content <span class="operator">=</span> newText; update(); } <span class="type">void</span> ElidedLabel<span class="operator">::</span>paintEvent(<span class="type"><a href="../qtgui/qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>event) { <span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>paintEvent(event); <span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> painter(<span class="keyword">this</span>); <span class="type"><a href="../qtgui/qfontmetrics.html">QFontMetrics</a></span> fontMetrics <span class="operator">=</span> painter<span class="operator">.</span>fontMetrics(); bool didElide <span class="operator">=</span> <span class="keyword">false</span>; <span class="type">int</span> lineSpacing <span class="operator">=</span> fontMetrics<span class="operator">.</span>lineSpacing(); <span class="type">int</span> y <span class="operator">=</span> <span class="number">0</span>; <span class="type"><a href="../qtgui/qtextlayout.html">QTextLayout</a></span> textLayout(content<span class="operator">,</span> painter<span class="operator">.</span>font()); textLayout<span class="operator">.</span>beginLayout(); forever { <span class="type"><a href="../qtgui/qtextline.html">QTextLine</a></span> line <span class="operator">=</span> textLayout<span class="operator">.</span>createLine(); <span class="keyword">if</span> (<span class="operator">!</span>line<span class="operator">.</span>isValid()) <span class="keyword">break</span>; line<span class="operator">.</span>setLineWidth(width()); <span class="type">int</span> nextLineY <span class="operator">=</span> y <span class="operator">+</span> lineSpacing; <span class="keyword">if</span> (height() <span class="operator">></span><span class="operator">=</span> nextLineY <span class="operator">+</span> lineSpacing) { line<span class="operator">.</span>draw(<span class="operator">&</span>painter<span class="operator">,</span> <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span>(<span class="number">0</span><span class="operator">,</span> y)); y <span class="operator">=</span> nextLineY; } <span class="keyword">else</span> { <span class="type"><a href="../qtcore/qstring.html">QString</a></span> lastLine <span class="operator">=</span> content<span class="operator">.</span>mid(line<span class="operator">.</span>textStart()); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> elidedLastLine <span class="operator">=</span> fontMetrics<span class="operator">.</span>elidedText(lastLine<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>ElideRight<span class="operator">,</span> width()); painter<span class="operator">.</span>drawText(<span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span>(<span class="number">0</span><span class="operator">,</span> y <span class="operator">+</span> fontMetrics<span class="operator">.</span>ascent())<span class="operator">,</span> elidedLastLine); line <span class="operator">=</span> textLayout<span class="operator">.</span>createLine(); didElide <span class="operator">=</span> line<span class="operator">.</span>isValid(); <span class="keyword">break</span>; } } textLayout<span class="operator">.</span>endLayout(); <span class="keyword">if</span> (didElide <span class="operator">!</span><span class="operator">=</span> elided) { elided <span class="operator">=</span> didElide; <span class="keyword">emit</span> elisionChanged(didElide); } } </pre> </div> <!-- @@@widgets/elidedlabel/elidedlabel.cpp --> </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>