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mainwindow.cpp Example File
demos/sub-attaq/mainwindow.cpp

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 //Own
 #include "mainwindow.h"
 #include "graphicsscene.h"

 //Qt
 #include <QGraphicsView>

 #ifdef QT_NO_OPENGL
     #include <QtGui/QMenuBar>
     #include <QtGui/QLayout>
     #include <QtGui/QApplication>
 #else
     #include <QtOpenGL/QtOpenGL>
 #endif

 MainWindow::MainWindow() : QMainWindow(0)
 {
     QMenuBar *menuBar = new QMenuBar;
     QMenu *file = new QMenu(tr("&File"),menuBar);

     QAction *newAction = new QAction(tr("New Game"),file);
     newAction->setShortcut(QKeySequence(Qt::CTRL | Qt::Key_N));
     file->addAction(newAction);
     QAction *quitAction = new QAction(tr("Quit"),file);
     quitAction->setShortcut(QKeySequence(Qt::CTRL | Qt::Key_Q));
     file->addAction(quitAction);

     menuBar->addMenu(file);
     setMenuBar(menuBar);

     QStringList list = QApplication::arguments();
     if (list.contains("-fullscreen")) {
         scene = new GraphicsScene(0, 0, 750, 400,GraphicsScene::Small);
         setWindowState(Qt::WindowFullScreen);
     } else {
         scene = new GraphicsScene(0, 0, 880, 630);
         layout()->setSizeConstraint(QLayout::SetFixedSize);
     }

     view = new QGraphicsView(scene,this);
     view->setAlignment(Qt::AlignLeft | Qt::AlignTop);
     QList<QAction *> actions;
     actions << newAction << quitAction;
     scene->setupScene(actions);
 #ifndef QT_NO_OPENGL
         view->setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
 #endif

     setCentralWidget(view);

 }

 MainWindow::~MainWindow()
 {
 }