Qt 5.9 | Qt Widgets | Item Views Puzzle Example | mainwindow.cpp Example File

Qt 5.9.9 Reference Documentation

# mainwindow.cpp Example File

itemviews/puzzle/mainwindow.cpp

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

      #include <QtWidgets>
      #include <stdlib.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 fileName =
              QFileDialog::getOpenFileName(this,
                                           tr("Open Image"), QString(),
                                           tr("Image Files (*.png *.jpg *.bmp)"));
          if (!fileName.isEmpty())
              loadImage(fileName);
      }

      void MainWindow::loadImage(const QString &fileName)
      {
          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, &QAction::triggered, this, &MainWindow::openImage);
          connect(exitAction, &QAction::triggered, qApp, &QCoreApplication::quit);
          connect(restartAction, &QAction::triggered, this, &MainWindow::setupPuzzle);
      }

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

          puzzleWidget = new PuzzleWidget(400);

          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, &PuzzleWidget::puzzleCompleted,
                  this, &MainWindow::setCompleted, Qt::QueuedConnection);

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