<?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>mainwindow.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-tools-settingseditor-example.html">Settings Editor Example</a></td><td >mainwindow.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">mainwindow.cpp Example File</h1> <span class="subtitle">tools/settingseditor/mainwindow.cpp</span> <!-- $$$tools/settingseditor/mainwindow.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 "locationdialog.h"</span> <span class="preprocessor">#include "mainwindow.h"</span> <span class="preprocessor">#include "settingstree.h"</span> MainWindow<span class="operator">::</span>MainWindow() : settingsTree(<span class="keyword">new</span> SettingsTree) <span class="operator">,</span> locationDialog(Q_NULLPTR) { setCentralWidget(settingsTree); createActions(); autoRefreshAct<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>); fallbacksAct<span class="operator">-</span><span class="operator">></span>setChecked(<span class="keyword">true</span>); setWindowTitle(<span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>applicationName()); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qrect.html">QRect</a></span> availableGeometry <span class="operator">=</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>desktop()<span class="operator">-</span><span class="operator">></span>availableGeometry(<span class="keyword">this</span>); adjustSize(); move((availableGeometry<span class="operator">.</span>width() <span class="operator">-</span> width()) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> (availableGeometry<span class="operator">.</span>height() <span class="operator">-</span> height()) <span class="operator">/</span> <span class="number">2</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>openSettings() { <span class="keyword">if</span> (<span class="operator">!</span>locationDialog) locationDialog <span class="operator">=</span> <span class="keyword">new</span> LocationDialog(<span class="keyword">this</span>); <span class="keyword">if</span> (locationDialog<span class="operator">-</span><span class="operator">></span>exec() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted) <span class="keyword">return</span>; SettingsPtr settings(<span class="keyword">new</span> <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span>(locationDialog<span class="operator">-</span><span class="operator">></span>format()<span class="operator">,</span> locationDialog<span class="operator">-</span><span class="operator">></span>scope()<span class="operator">,</span> locationDialog<span class="operator">-</span><span class="operator">></span>organization()<span class="operator">,</span> locationDialog<span class="operator">-</span><span class="operator">></span>application())); setSettingsObject(settings); fallbacksAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>openIniFile() { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> directory <span class="operator">=</span> <span class="type"><a href="../qtcore/qstandardpaths.html">QStandardPaths</a></span><span class="operator">::</span>writableLocation(<span class="type"><a href="../qtcore/qstandardpaths.html">QStandardPaths</a></span><span class="operator">::</span>ConfigLocation); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open INI File"</span>)<span class="operator">,</span> directory<span class="operator">,</span> tr(<span class="string">"INI Files (*.ini *.conf)"</span>)); <span class="keyword">if</span> (fileName<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; SettingsPtr settings(<span class="keyword">new</span> <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span>(fileName<span class="operator">,</span> <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span><span class="operator">::</span>IniFormat)); setSettingsObject(settings); fallbacksAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>openPropertyList() { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> directory <span class="operator">=</span> <span class="type"><a href="../qtcore/qstandardpaths.html">QStandardPaths</a></span><span class="operator">::</span>writableLocation(<span class="type"><a href="../qtcore/qstandardpaths.html">QStandardPaths</a></span><span class="operator">::</span>ConfigLocation); <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> fileName <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileName(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open Property List"</span>)<span class="operator">,</span> directory<span class="operator">,</span> tr(<span class="string">"Property List Files (*.plist)"</span>)); <span class="keyword">if</span> (fileName<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; SettingsPtr settings(<span class="keyword">new</span> <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span>(fileName<span class="operator">,</span> <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span><span class="operator">::</span>NativeFormat)); setSettingsObject(settings); fallbacksAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>openRegistryPath() { <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> path <span class="operator">=</span> <span class="type"><a href="qinputdialog.html">QInputDialog</a></span><span class="operator">::</span>getText(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open Registry Path"</span>)<span class="operator">,</span> tr(<span class="string">"Enter the path in the Windows registry:"</span>)<span class="operator">,</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">::</span>Normal<span class="operator">,</span> <span class="string">"HKEY_CURRENT_USER\\"</span>); <span class="keyword">if</span> (path<span class="operator">.</span>isEmpty()) <span class="keyword">return</span>; SettingsPtr settings(<span class="keyword">new</span> <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span>(path<span class="operator">,</span> <span class="type"><a href="../qtcore/qsettings.html">QSettings</a></span><span class="operator">::</span>NativeFormat)); setSettingsObject(settings); fallbacksAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); } <span class="type">void</span> MainWindow<span class="operator">::</span>about() { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>about(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"About Settings Editor"</span>)<span class="operator">,</span> tr(<span class="string">"The <b>Settings Editor</b> example shows how to access "</span> <span class="string">"application settings using Qt."</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>createActions() { <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>fileMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&File"</span>)); <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>openSettingsAct <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Open Application Settings..."</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>openSettings); openSettingsAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Open); <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>openIniFileAct <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Open I&NI File..."</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>openIniFile); openIniFileAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+N"</span>)); <span class="preprocessor">#ifdef Q_OS_OSX</span> <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>openPropertyListAct <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Open Apple &Property List..."</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>openPropertyList); openPropertyListAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+P"</span>)); <span class="preprocessor">#endif // Q_OS_OSX</span> <span class="preprocessor">#ifdef Q_OS_WIN</span> <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>openRegistryPathAct <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Open Windows &Registry Path..."</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>openRegistryPath); openRegistryPathAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+G"</span>)); <span class="preprocessor">#endif // Q_OS_WIN</span> fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); refreshAct <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Refresh"</span>)<span class="operator">,</span> settingsTree<span class="operator">,</span> <span class="operator">&</span>SettingsTree<span class="operator">::</span>refresh); refreshAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+R"</span>)); refreshAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); fileMenu<span class="operator">-</span><span class="operator">></span>addSeparator(); <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>exitAct <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"E&xit"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">::</span>close); exitAct<span class="operator">-</span><span class="operator">></span>setShortcuts(<span class="type"><a href="../qtgui/qkeysequence.html">QKeySequence</a></span><span class="operator">::</span>Quit); <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>optionsMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Options"</span>)); autoRefreshAct <span class="operator">=</span> optionsMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Auto-Refresh"</span>)); autoRefreshAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+A"</span>)); autoRefreshAct<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); autoRefreshAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); connect(autoRefreshAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> settingsTree<span class="operator">,</span> <span class="operator">&</span>SettingsTree<span class="operator">::</span>setAutoRefresh); connect(autoRefreshAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> refreshAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>setDisabled); fallbacksAct <span class="operator">=</span> optionsMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Fallbacks"</span>)); fallbacksAct<span class="operator">-</span><span class="operator">></span>setShortcut(tr(<span class="string">"Ctrl+F"</span>)); fallbacksAct<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>); fallbacksAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); connect(fallbacksAct<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>triggered<span class="operator">,</span> settingsTree<span class="operator">,</span> <span class="operator">&</span>SettingsTree<span class="operator">::</span>setFallbacksEnabled); <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>helpMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Help"</span>)); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&About"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>about); helpMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"About &Qt"</span>)<span class="operator">,</span> qApp<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>quit); } <span class="type">void</span> MainWindow<span class="operator">::</span>setSettingsObject(<span class="keyword">const</span> SettingsPtr <span class="operator">&</span>settings) { settings<span class="operator">-</span><span class="operator">></span>setFallbacksEnabled(fallbacksAct<span class="operator">-</span><span class="operator">></span>isChecked()); settingsTree<span class="operator">-</span><span class="operator">></span>setSettingsObject(settings); refreshAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); autoRefreshAct<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> niceName <span class="operator">=</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>cleanPath(settings<span class="operator">-</span><span class="operator">></span>fileName()); <span class="type">int</span> pos <span class="operator">=</span> niceName<span class="operator">.</span>lastIndexOf(QLatin1Char(<span class="char">'/'</span>)); <span class="keyword">if</span> (pos <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) niceName<span class="operator">.</span>remove(<span class="number">0</span><span class="operator">,</span> pos <span class="operator">+</span> <span class="number">1</span>); <span class="keyword">if</span> (<span class="operator">!</span>settings<span class="operator">-</span><span class="operator">></span>isWritable()) niceName <span class="operator">=</span> tr(<span class="string">"%1 (read only)"</span>)<span class="operator">.</span>arg(niceName); setWindowTitle(tr(<span class="string">"%1 - %2"</span>)<span class="operator">.</span>arg(niceName<span class="operator">,</span> <span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>applicationName())); statusBar()<span class="operator">-</span><span class="operator">></span>showMessage(tr(<span class="string">"Opened \"%1\""</span>)<span class="operator">.</span>arg(<span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>toNativeSeparators(settings<span class="operator">-</span><span class="operator">></span>fileName()))); } </pre> </div> <!-- @@@tools/settingseditor/mainwindow.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>