<?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>testwidget.cpp Example File | Qt Widgets 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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-widgets-elidedlabel-example.html">Elided Label Example</a></td><td >testwidget.cpp Example File</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="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">testwidget.cpp Example File</h1> <span class="subtitle">widgets/elidedlabel/testwidget.cpp</span> <!-- $$$widgets/elidedlabel/testwidget.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 "testwidget.h"</span> <span class="preprocessor">#include "elidedlabel.h"</span> <span class="preprocessor">#include <QtWidgets/QLabel></span> <span class="preprocessor">#include <QtWidgets/QPushButton></span> <span class="preprocessor">#include <QtWidgets/QSizePolicy></span> <span class="preprocessor">#include <QtWidgets/QGridLayout></span> TestWidget<span class="operator">::</span>TestWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent): <span class="type"><a href="qwidget.html">QWidget</a></span>(parent) { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> romeo <span class="operator">=</span> tr( <span class="string">"But soft, what light through yonder window breaks? / "</span> <span class="string">"It is the east, and Juliet is the sun. / "</span> <span class="string">"Arise, fair sun, and kill the envious moon, / "</span> <span class="string">"Who is already sick and pale with grief / "</span> <span class="string">"That thou, her maid, art far more fair than she."</span> ); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> macbeth <span class="operator">=</span> tr( <span class="string">"To-morrow, and to-morrow, and to-morrow, / "</span> <span class="string">"Creeps in this petty pace from day to day, / "</span> <span class="string">"To the last syllable of recorded time; / "</span> <span class="string">"And all our yesterdays have lighted fools / "</span> <span class="string">"The way to dusty death. Out, out, brief candle! / "</span> <span class="string">"Life's but a walking shadow, a poor player, / "</span> <span class="string">"That struts and frets his hour upon the stage, / "</span> <span class="string">"And then is heard no more. It is a tale / "</span> <span class="string">"Told by an idiot, full of sound and fury, / "</span> <span class="string">"Signifying nothing."</span> ); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> harry <span class="operator">=</span> tr(<span class="string">"Feeling lucky, punk?"</span>); textSamples <span class="operator"><</span><span class="operator"><</span> romeo <span class="operator"><</span><span class="operator"><</span> macbeth <span class="operator"><</span><span class="operator"><</span> harry; sampleIndex <span class="operator">=</span> <span class="number">0</span>; elidedText <span class="operator">=</span> <span class="keyword">new</span> ElidedLabel(textSamples<span class="operator">[</span>sampleIndex<span class="operator">]</span><span class="operator">,</span> <span class="keyword">this</span>); elidedText<span class="operator">-</span><span class="operator">></span>setFrameStyle(<span class="type"><a href="qframe.html">QFrame</a></span><span class="operator">::</span>Box); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>switchButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"Switch text"</span>)); connect(switchButton<span class="operator">,</span> SIGNAL(clicked(bool))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(switchText())); <span class="type"><a href="qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>exitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"Exit"</span>)); connect(exitButton<span class="operator">,</span> SIGNAL(clicked(bool))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close())); <span class="type"><a href="qlabel.html">QLabel</a></span> <span class="operator">*</span>label <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Elided"</span>)); label<span class="operator">-</span><span class="operator">></span>setVisible(elidedText<span class="operator">-</span><span class="operator">></span>isElided()); connect(elidedText<span class="operator">,</span> SIGNAL(elisionChanged(bool))<span class="operator">,</span> label<span class="operator">,</span> SLOT(setVisible(bool))); widthSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal); widthSlider<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="number">0</span>); connect(widthSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(onWidthChanged(<span class="type">int</span>))); heightSlider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Vertical); heightSlider<span class="operator">-</span><span class="operator">></span>setInvertedAppearance(<span class="keyword">true</span>); heightSlider<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="number">0</span>); connect(heightSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(onHeightChanged(<span class="type">int</span>))); <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>layout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>(); layout<span class="operator">-</span><span class="operator">></span>addWidget(label<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignCenter); layout<span class="operator">-</span><span class="operator">></span>addWidget(switchButton<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">2</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(exitButton<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">3</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(widthSlider<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">3</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(heightSlider<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span>); layout<span class="operator">-</span><span class="operator">></span>addWidget(elidedText<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignTop <span class="operator">|</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>AlignLeft); setLayout(layout); } <span class="type">void</span> TestWidget<span class="operator">::</span>resizeEvent(<span class="type"><a href="../qtgui/qresizeevent.html">QResizeEvent</a></span> <span class="operator">*</span>event) { Q_UNUSED(event) <span class="type">int</span> maxWidth <span class="operator">=</span> widthSlider<span class="operator">-</span><span class="operator">></span>width(); widthSlider<span class="operator">-</span><span class="operator">></span>setMaximum(maxWidth); widthSlider<span class="operator">-</span><span class="operator">></span>setValue(maxWidth <span class="operator">/</span> <span class="number">2</span>); <span class="type">int</span> maxHeight <span class="operator">=</span> heightSlider<span class="operator">-</span><span class="operator">></span>height(); heightSlider<span class="operator">-</span><span class="operator">></span>setMaximum(maxHeight); heightSlider<span class="operator">-</span><span class="operator">></span>setValue(maxHeight <span class="operator">/</span> <span class="number">2</span>); elidedText<span class="operator">-</span><span class="operator">></span>setFixedSize(widthSlider<span class="operator">-</span><span class="operator">></span>value()<span class="operator">,</span> heightSlider<span class="operator">-</span><span class="operator">></span>value()); } <span class="type">void</span> TestWidget<span class="operator">::</span>switchText() { sampleIndex <span class="operator">=</span> (sampleIndex <span class="operator">+</span> <span class="number">1</span>) <span class="operator">%</span> textSamples<span class="operator">.</span>size(); elidedText<span class="operator">-</span><span class="operator">></span>setText(textSamples<span class="operator">.</span>at(sampleIndex)); } <span class="type">void</span> TestWidget<span class="operator">::</span>onWidthChanged(<span class="type">int</span> width) { elidedText<span class="operator">-</span><span class="operator">></span>setFixedWidth(width); } <span class="type">void</span> TestWidget<span class="operator">::</span>onHeightChanged(<span class="type">int</span> height) { elidedText<span class="operator">-</span><span class="operator">></span>setFixedHeight(height); } </pre> </div> <!-- @@@widgets/elidedlabel/testwidget.cpp --> </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>