<?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>languagechooser.cpp Example File | Qt Widgets 5.12.2</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-tools-i18n-example.html">I18N Example</a></td><td >languagechooser.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtwidgets-index.html">Qt 5.12.2 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">languagechooser.cpp Example File</h1> <span class="subtitle">tools/i18n/languagechooser.cpp</span> <!-- $$$tools/i18n/languagechooser.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 examples 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 <QtWidgets></span> <span class="preprocessor">#include "languagechooser.h"</span> <span class="preprocessor">#include "mainwindow.h"</span> <span class="preprocessor">#if 0 // Used to be included in Qt4 for Q_WS_MAC</span> <span class="keyword">extern</span> <span class="type">void</span> qt_mac_set_menubar_merge(bool merge); <span class="preprocessor">#endif</span> LanguageChooser<span class="operator">::</span>LanguageChooser(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">&</span> defaultLang<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qdialog.html">QDialog</a></span>(parent<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>WindowStaysOnTopHint) { groupBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgroupbox.html">QGroupBox</a></span>(<span class="string">"Languages"</span>); <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>groupBoxLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>; <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> qmFiles <span class="operator">=</span> findQmFiles(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> qmFiles<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="qcheckbox.html">QCheckBox</a></span> <span class="operator">*</span>checkBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcheckbox.html">QCheckBox</a></span>(languageName(qmFiles<span class="operator">[</span>i<span class="operator">]</span>)); qmFileForCheckBoxMap<span class="operator">.</span>insert(checkBox<span class="operator">,</span> qmFiles<span class="operator">[</span>i<span class="operator">]</span>); connect(checkBox<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span>bool<span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qcheckbox.html">QCheckBox</a></span><span class="operator">::</span>toggled)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>LanguageChooser<span class="operator">::</span>checkBoxToggled); <span class="keyword">if</span> (languageMatch(defaultLang<span class="operator">,</span> qmFiles<span class="operator">[</span>i<span class="operator">]</span>)) checkBox<span class="operator">-</span><span class="operator">></span>setCheckState(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Checked); groupBoxLayout<span class="operator">-</span><span class="operator">></span>addWidget(checkBox<span class="operator">,</span> i <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> i <span class="operator">%</span> <span class="number">2</span>); } groupBox<span class="operator">-</span><span class="operator">></span>setLayout(groupBoxLayout); buttonBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span>; showAllButton <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">></span>addButton(<span class="string">"Show All"</span><span class="operator">,</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>ActionRole); hideAllButton <span class="operator">=</span> buttonBox<span class="operator">-</span><span class="operator">></span>addButton(<span class="string">"Hide All"</span><span class="operator">,</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>ActionRole); connect(showAllButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qabstractbutton.html">QAbstractButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>LanguageChooser<span class="operator">::</span>showAll); connect(hideAllButton<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qabstractbutton.html">QAbstractButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>LanguageChooser<span class="operator">::</span>hideAll); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>; mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(groupBox); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonBox); setLayout(mainLayout); <span class="preprocessor">#if 0 // Used to be included in Qt4 for Q_WS_MAC</span> qt_mac_set_menubar_merge(<span class="keyword">false</span>); <span class="preprocessor">#endif</span> setWindowTitle(<span class="string">"I18N"</span>); } bool LanguageChooser<span class="operator">::</span>languageMatch(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">&</span> lang<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">&</span> qmFile) { <span class="comment">//qmFile: i18n_xx.qm</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> prefix <span class="operator">=</span> <span class="string">"i18n_"</span>; <span class="keyword">const</span> <span class="type">int</span> langTokenLength <span class="operator">=</span> <span class="number">2</span>; <span class="comment">/*FIXME: is checking two chars enough?*/</span> <span class="keyword">return</span> qmFile<span class="operator">.</span>midRef(qmFile<span class="operator">.</span>indexOf(prefix) <span class="operator">+</span> prefix<span class="operator">.</span>length()<span class="operator">,</span> langTokenLength) <span class="operator">=</span><span class="operator">=</span> lang<span class="operator">.</span>leftRef(langTokenLength); } bool LanguageChooser<span class="operator">::</span>eventFilter(<span class="type"><a href="../qtcore/qobject.html">QObject</a></span> <span class="operator">*</span>object<span class="operator">,</span> <span class="type"><a href="../qtcore/qevent.html">QEvent</a></span> <span class="operator">*</span>event) { <span class="keyword">if</span> (event<span class="operator">-</span><span class="operator">></span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtcore/qevent.html">QEvent</a></span><span class="operator">::</span>Close) { MainWindow <span class="operator">*</span>window <span class="operator">=</span> qobject_cast<span class="operator"><</span>MainWindow <span class="operator">*</span><span class="operator">></span>(object); <span class="keyword">if</span> (window) { <span class="type"><a href="qcheckbox.html">QCheckBox</a></span> <span class="operator">*</span>checkBox <span class="operator">=</span> mainWindowForCheckBoxMap<span class="operator">.</span>key(window); <span class="keyword">if</span> (checkBox) checkBox<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">false</span>); } } <span class="keyword">return</span> <span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">::</span>eventFilter(object<span class="operator">,</span> event); } <span class="type">void</span> LanguageChooser<span class="operator">::</span>closeEvent(<span class="type"><a href="../qtgui/qcloseevent.html">QCloseEvent</a></span> <span class="operator">*</span> <span class="comment">/* event */</span>) { <a href="qapplication.html#qApp">qApp</a><span class="operator">-</span><span class="operator">></span>quit(); } <span class="type">void</span> LanguageChooser<span class="operator">::</span>checkBoxToggled() { <span class="type"><a href="qcheckbox.html">QCheckBox</a></span> <span class="operator">*</span>checkBox <span class="operator">=</span> qobject_cast<span class="operator"><</span><span class="type"><a href="qcheckbox.html">QCheckBox</a></span> <span class="operator">*</span><span class="operator">></span>(sender()); MainWindow <span class="operator">*</span>window <span class="operator">=</span> mainWindowForCheckBoxMap<span class="operator">[</span>checkBox<span class="operator">]</span>; <span class="keyword">if</span> (<span class="operator">!</span>window) { <span class="type"><a href="../qtcore/qtranslator.html">QTranslator</a></span> translator; translator<span class="operator">.</span>load(qmFileForCheckBoxMap<span class="operator">[</span>checkBox<span class="operator">]</span>); <a href="qapplication.html#qApp">qApp</a><span class="operator">-</span><span class="operator">></span>installTranslator(<span class="operator">&</span>translator); window <span class="operator">=</span> <span class="keyword">new</span> MainWindow; window<span class="operator">-</span><span class="operator">></span>setPalette(colorForLanguage(checkBox<span class="operator">-</span><span class="operator">></span>text())); window<span class="operator">-</span><span class="operator">></span>installEventFilter(<span class="keyword">this</span>); mainWindowForCheckBoxMap<span class="operator">.</span>insert(checkBox<span class="operator">,</span> window); } window<span class="operator">-</span><span class="operator">></span>setVisible(checkBox<span class="operator">-</span><span class="operator">></span>isChecked()); } <span class="type">void</span> LanguageChooser<span class="operator">::</span>showAll() { foreach (<span class="type"><a href="qcheckbox.html">QCheckBox</a></span> <span class="operator">*</span>checkBox<span class="operator">,</span> qmFileForCheckBoxMap<span class="operator">.</span>keys()) checkBox<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>); } <span class="type">void</span> LanguageChooser<span class="operator">::</span>hideAll() { foreach (<span class="type"><a href="qcheckbox.html">QCheckBox</a></span> <span class="operator">*</span>checkBox<span class="operator">,</span> qmFileForCheckBoxMap<span class="operator">.</span>keys()) checkBox<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">false</span>); } <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> LanguageChooser<span class="operator">::</span>findQmFiles() { <span class="type"><a href="../qtcore/qdir.html">QDir</a></span> dir(<span class="string">":/translations"</span>); <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> fileNames <span class="operator">=</span> dir<span class="operator">.</span>entryList(<span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span>(<span class="string">"*.qm"</span>)<span class="operator">,</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>Files<span class="operator">,</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>Name); <span class="type"><a href="../qtcore/qstringlist.html#QMutableStringListIterator-typedef">QMutableStringListIterator</a></span> i(fileNames); <span class="keyword">while</span> (i<span class="operator">.</span>hasNext()) { i<span class="operator">.</span>next(); i<span class="operator">.</span>setValue(dir<span class="operator">.</span>filePath(i<span class="operator">.</span>value())); } <span class="keyword">return</span> fileNames; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> LanguageChooser<span class="operator">::</span>languageName(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>qmFile) { <span class="type"><a href="../qtcore/qtranslator.html">QTranslator</a></span> translator; translator<span class="operator">.</span>load(qmFile); <span class="keyword">return</span> translator<span class="operator">.</span>translate(<span class="string">"MainWindow"</span><span class="operator">,</span> <span class="string">"English"</span>); } <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> LanguageChooser<span class="operator">::</span>colorForLanguage(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>language) { <span class="type"><a href="../qtcore/qtglobal.html#uint-typedef">uint</a></span> hashValue <span class="operator">=</span> <a href="qsizepolicy.html#qHash">qHash</a>(language); <span class="type">int</span> red <span class="operator">=</span> <span class="number">156</span> <span class="operator">+</span> (hashValue <span class="operator">&</span> <span class="number">0x3F</span>); <span class="type">int</span> green <span class="operator">=</span> <span class="number">156</span> <span class="operator">+</span> ((hashValue <span class="operator">></span><span class="operator">></span> <span class="number">6</span>) <span class="operator">&</span> <span class="number">0x3F</span>); <span class="type">int</span> blue <span class="operator">=</span> <span class="number">156</span> <span class="operator">+</span> ((hashValue <span class="operator">></span><span class="operator">></span> <span class="number">12</span>) <span class="operator">&</span> <span class="number">0x3F</span>); <span class="keyword">return</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span>(red<span class="operator">,</span> green<span class="operator">,</span> blue); } </pre> </div> <!-- @@@tools/i18n/languagechooser.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>