mainwindow.cpp Example File
draganddrop/puzzle/mainwindow.cpp
#include "mainwindow.h"
#include "pieceslist.h"
#include "puzzlewidget.h"
#include <QtWidgets>
#include <stdlib.h>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
setupMenus();
setupWidgets();
setSizePolicy(QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed));
setWindowTitle(tr("Puzzle"));
}
void MainWindow::openImage()
{
const QString directory =
QStandardPaths::standardLocations(QStandardPaths::PicturesLocation).value(0, QDir::homePath());
QFileDialog dialog(this, tr("Open Image"), directory);
dialog.setAcceptMode(QFileDialog::AcceptOpen);
dialog.setFileMode(QFileDialog::ExistingFile);
QStringList mimeTypeFilters;
for (const QByteArray &mimeTypeName : QImageReader::supportedMimeTypes())
mimeTypeFilters.append(mimeTypeName);
mimeTypeFilters.sort();
dialog.setMimeTypeFilters(mimeTypeFilters);
dialog.selectMimeTypeFilter("image/jpeg");
if (dialog.exec() == QDialog::Accepted)
loadImage(dialog.selectedFiles().constFirst());
}
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::Close);
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->width(),
puzzleWidget->height(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
piecesList->clear();
for (int y = 0; y < 5; ++y) {
for (int x = 0; x < 5; ++x) {
int pieceSize = puzzleWidget->pieceSize();
QPixmap pieceImage = puzzleImage.copy(x * pieceSize, y * pieceSize, pieceSize, pieceSize);
piecesList->addPiece(pieceImage, QPoint(x, y));
}
}
for (int i = 0; i < piecesList->count(); ++i) {
if (QRandomGenerator::global()->bounded(2) == 1) {
QListWidgetItem *item = piecesList->takeItem(i);
piecesList->insertItem(0, item);
}
}
puzzleWidget->clear();
}
void MainWindow::setupMenus()
{
QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
QAction *openAction = fileMenu->addAction(tr("&Open..."), this, &MainWindow::openImage);
openAction->setShortcuts(QKeySequence::Open);
QAction *exitAction = fileMenu->addAction(tr("E&xit"), qApp, &QCoreApplication::quit);
exitAction->setShortcuts(QKeySequence::Quit);
QMenu *gameMenu = menuBar()->addMenu(tr("&Game"));
gameMenu->addAction(tr("&Restart"), this, &MainWindow::setupPuzzle);
}
void MainWindow::setupWidgets()
{
QFrame *frame = new QFrame;
QHBoxLayout *frameLayout = new QHBoxLayout(frame);
puzzleWidget = new PuzzleWidget(400);
piecesList = new PiecesList(puzzleWidget->pieceSize(), this);
connect(puzzleWidget, &PuzzleWidget::puzzleCompleted,
this, &MainWindow::setCompleted, Qt::QueuedConnection);
frameLayout->addWidget(piecesList);
frameLayout->addWidget(puzzleWidget);
setCentralWidget(frame);
}