mainwindow.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** 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 Nokia Corporation and its Subsidiary(-ies) 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."
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtGui>
 #include <stdlib.h>

 #include "mainwindow.h"
 #include "piecesmodel.h"
 #include "puzzlewidget.h"

 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
 {
     setupMenus();
     setupWidgets();
     model = new PiecesModel(this);
     piecesList->setModel(model);

     setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));
     setWindowTitle(tr("Puzzle"));
 }

 void MainWindow::openImage(const QString &path)
 {
     QString fileName = path;

     if (fileName.isNull())
         fileName = QFileDialog::getOpenFileName(this,
             tr("Open Image"), "", tr("Image Files (*.png *.jpg *.bmp)"));

     if (!fileName.isEmpty()) {
         QPixmap newImage;
         if (!newImage.load(fileName)) {
             QMessageBox::warning(this, tr("Open Image"),
                                  tr("The image file could not be loaded."),
                                  QMessageBox::Cancel);
             return;
         }
         puzzleImage = newImage;
         setupPuzzle();
     }
 }

 void MainWindow::setCompleted()
 {
     QMessageBox::information(this, tr("Puzzle Completed"),
         tr("Congratulations! You have completed the puzzle!\n"
            "Click OK to start again."),
         QMessageBox::Ok);

     setupPuzzle();
 }

 void MainWindow::setupPuzzle()
 {
     int size = qMin(puzzleImage.width(), puzzleImage.height());
     puzzleImage = puzzleImage.copy((puzzleImage.width() - size)/2,
         (puzzleImage.height() - size)/2, size, size).scaled(400,
             400, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);

     qsrand(QCursor::pos().x() ^ QCursor::pos().y());

     model->addPieces(puzzleImage);
     puzzleWidget->clear();
 }

 void MainWindow::setupMenus()
 {
     QMenu *fileMenu = menuBar()->addMenu(tr("&File"));

     QAction *openAction = fileMenu->addAction(tr("&Open..."));
     openAction->setShortcuts(QKeySequence::Open);

     QAction *exitAction = fileMenu->addAction(tr("E&xit"));
     exitAction->setShortcuts(QKeySequence::Quit);

     QMenu *gameMenu = menuBar()->addMenu(tr("&Game"));

     QAction *restartAction = gameMenu->addAction(tr("&Restart"));

     connect(openAction, SIGNAL(triggered()), this, SLOT(openImage()));
     connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
     connect(restartAction, SIGNAL(triggered()), this, SLOT(setupPuzzle()));
 }

 void MainWindow::setupWidgets()
 {
     QFrame *frame = new QFrame;
     QHBoxLayout *frameLayout = new QHBoxLayout(frame);

     piecesList = new QListView;
     piecesList->setDragEnabled(true);
     piecesList->setViewMode(QListView::IconMode);
     piecesList->setIconSize(QSize(60, 60));
     piecesList->setGridSize(QSize(80, 80));
     piecesList->setSpacing(10);
     piecesList->setMovement(QListView::Snap);
     piecesList->setAcceptDrops(true);
     piecesList->setDropIndicatorShown(true);

     PiecesModel *model = new PiecesModel(this);
     piecesList->setModel(model);

     puzzleWidget = new PuzzleWidget;

     connect(puzzleWidget, SIGNAL(puzzleCompleted()),
             this, SLOT(setCompleted()), Qt::QueuedConnection);

     frameLayout->addWidget(piecesList);
     frameLayout->addWidget(puzzleWidget);
     setCentralWidget(frame);
 }