Qt 4.8: mainwindow.cpp Example File (itemviews/puzzle/mainwindow.cpp)

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# mainwindow.cpp Example File

itemviews/puzzle/mainwindow.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** 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
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     **   * Redistributions of source code must retain the above copyright
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     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
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     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     #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(puzzleWidget->pieceSize(), 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(puzzleWidget->imageSize(),
                 puzzleWidget->imageSize(), 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);

     #if defined(Q_OS_SYMBIAN) || defined(Q_WS_SIMULATOR)
         puzzleWidget = new PuzzleWidget(260);
     #else
         puzzleWidget = new PuzzleWidget(400);
     #endif

         piecesList = new QListView;
         piecesList->setDragEnabled(true);
         piecesList->setViewMode(QListView::IconMode);
         piecesList->setIconSize(QSize(puzzleWidget->pieceSize() - 20, puzzleWidget->pieceSize() - 20));
         piecesList->setGridSize(QSize(puzzleWidget->pieceSize(), puzzleWidget->pieceSize()));
         piecesList->setSpacing(10);
         piecesList->setMovement(QListView::Snap);
         piecesList->setAcceptDrops(true);
         piecesList->setDropIndicatorShown(true);

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

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

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