<?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 5.12.6</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-draganddrop-puzzle-example.html">Drag and Drop Puzzle Example</a></td><td >mainwindow.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">mainwindow.cpp Example File</h1> <span class="subtitle">draganddrop/puzzle/mainwindow.cpp</span> <!-- $$$draganddrop/puzzle/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 "mainwindow.h"</span> <span class="preprocessor">#include "pieceslist.h"</span> <span class="preprocessor">#include "puzzlewidget.h"</span> <span class="preprocessor">#include <QtWidgets></span> <span class="preprocessor">#include <stdlib.h></span> MainWindow<span class="operator">::</span>MainWindow(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qmainwindow.html">QMainWindow</a></span>(parent) { setupMenus(); setupWidgets(); setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span>(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed)); setWindowTitle(tr(<span class="string">"Puzzle"</span>)); } <span class="type">void</span> MainWindow<span class="operator">::</span>openImage() { <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>standardLocations(<span class="type"><a href="../qtcore/qstandardpaths.html">QStandardPaths</a></span><span class="operator">::</span>PicturesLocation)<span class="operator">.</span>value(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qdir.html">QDir</a></span><span class="operator">::</span>homePath()); <span class="type"><a href="qfiledialog.html">QFileDialog</a></span> dialog(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open Image"</span>)<span class="operator">,</span> directory); dialog<span class="operator">.</span>setAcceptMode(<span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>AcceptOpen); dialog<span class="operator">.</span>setFileMode(<span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>ExistingFile); <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> mimeTypeFilters; <span class="keyword">for</span> (<span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> <span class="operator">&</span>mimeTypeName : <span class="type"><a href="../qtgui/qimagereader.html">QImageReader</a></span><span class="operator">::</span>supportedMimeTypes()) mimeTypeFilters<span class="operator">.</span>append(mimeTypeName); mimeTypeFilters<span class="operator">.</span>sort(); dialog<span class="operator">.</span>setMimeTypeFilters(mimeTypeFilters); dialog<span class="operator">.</span>selectMimeTypeFilter(<span class="string">"image/jpeg"</span>); <span class="keyword">if</span> (dialog<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) loadImage(dialog<span class="operator">.</span>selectedFiles()<span class="operator">.</span>constFirst()); } <span class="type">void</span> MainWindow<span class="operator">::</span>loadImage(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>fileName) { <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> newImage; <span class="keyword">if</span> (<span class="operator">!</span>newImage<span class="operator">.</span>load(fileName)) { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open Image"</span>)<span class="operator">,</span> tr(<span class="string">"The image file could not be loaded."</span>)<span class="operator">,</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Close); <span class="keyword">return</span>; } puzzleImage <span class="operator">=</span> newImage; setupPuzzle(); } <span class="type">void</span> MainWindow<span class="operator">::</span>setCompleted() { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Puzzle Completed"</span>)<span class="operator">,</span> tr(<span class="string">"Congratulations! You have completed the puzzle!\n"</span> <span class="string">"Click OK to start again."</span>)<span class="operator">,</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Ok); setupPuzzle(); } <span class="type">void</span> MainWindow<span class="operator">::</span>setupPuzzle() { <span class="type">int</span> size <span class="operator">=</span> <a href="../qtcore/qtglobal.html#qMin">qMin</a>(puzzleImage<span class="operator">.</span>width()<span class="operator">,</span> puzzleImage<span class="operator">.</span>height()); puzzleImage <span class="operator">=</span> puzzleImage<span class="operator">.</span>copy((puzzleImage<span class="operator">.</span>width() <span class="operator">-</span> size) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> (puzzleImage<span class="operator">.</span>height() <span class="operator">-</span> size) <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> size<span class="operator">,</span> size)<span class="operator">.</span>scaled(puzzleWidget<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> puzzleWidget<span class="operator">-</span><span class="operator">></span>height()<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>IgnoreAspectRatio<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>SmoothTransformation); piecesList<span class="operator">-</span><span class="operator">></span>clear(); <span class="keyword">for</span> (<span class="type">int</span> y <span class="operator">=</span> <span class="number">0</span>; y <span class="operator"><</span> <span class="number">5</span>; <span class="operator">+</span><span class="operator">+</span>y) { <span class="keyword">for</span> (<span class="type">int</span> x <span class="operator">=</span> <span class="number">0</span>; x <span class="operator"><</span> <span class="number">5</span>; <span class="operator">+</span><span class="operator">+</span>x) { <span class="type">int</span> pieceSize <span class="operator">=</span> puzzleWidget<span class="operator">-</span><span class="operator">></span>pieceSize(); <span class="type"><a href="../qtgui/qpixmap.html">QPixmap</a></span> pieceImage <span class="operator">=</span> puzzleImage<span class="operator">.</span>copy(x <span class="operator">*</span> pieceSize<span class="operator">,</span> y <span class="operator">*</span> pieceSize<span class="operator">,</span> pieceSize<span class="operator">,</span> pieceSize); piecesList<span class="operator">-</span><span class="operator">></span>addPiece(pieceImage<span class="operator">,</span> <span class="type"><a href="../qtcore/qpoint.html">QPoint</a></span>(x<span class="operator">,</span> y)); } } <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> piecesList<span class="operator">-</span><span class="operator">></span>count(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">if</span> (<span class="type"><a href="../qtcore/qrandomgenerator.html">QRandomGenerator</a></span><span class="operator">::</span>global()<span class="operator">-</span><span class="operator">></span>bounded(<span class="number">2</span>) <span class="operator">=</span><span class="operator">=</span> <span class="number">1</span>) { <span class="type"><a href="qlistwidgetitem.html">QListWidgetItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> piecesList<span class="operator">-</span><span class="operator">></span>takeItem(i); piecesList<span class="operator">-</span><span class="operator">></span>insertItem(<span class="number">0</span><span class="operator">,</span> item); } } puzzleWidget<span class="operator">-</span><span class="operator">></span>clear(); } <span class="type">void</span> MainWindow<span class="operator">::</span>setupMenus() { <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>openAction <span class="operator">=</span> fileMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Open..."</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>openImage); openAction<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>exitAction <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> <a href="qapplication.html#qApp">qApp</a><span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>quit); exitAction<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>gameMenu <span class="operator">=</span> menuBar()<span class="operator">-</span><span class="operator">></span>addMenu(tr(<span class="string">"&Game"</span>)); gameMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"&Restart"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>setupPuzzle); } <span class="type">void</span> MainWindow<span class="operator">::</span>setupWidgets() { <span class="type"><a href="qframe.html">QFrame</a></span> <span class="operator">*</span>frame <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qframe.html">QFrame</a></span>; <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span> <span class="operator">*</span>frameLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>(frame); puzzleWidget <span class="operator">=</span> <span class="keyword">new</span> PuzzleWidget(<span class="number">400</span>); piecesList <span class="operator">=</span> <span class="keyword">new</span> PiecesList(puzzleWidget<span class="operator">-</span><span class="operator">></span>pieceSize()<span class="operator">,</span> <span class="keyword">this</span>); connect(puzzleWidget<span class="operator">,</span> <span class="operator">&</span>PuzzleWidget<span class="operator">::</span>puzzleCompleted<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>setCompleted<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>QueuedConnection); frameLayout<span class="operator">-</span><span class="operator">></span>addWidget(piecesList); frameLayout<span class="operator">-</span><span class="operator">></span>addWidget(puzzleWidget); setCentralWidget(frame); } </pre> </div> <!-- @@@draganddrop/puzzle/mainwindow.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>