Пример #1
0
int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_5) == 0) {
        QMessageBox::critical(0, "OpenGL features missing",
            "OpenGL version 1.5 or higher is required to run this demo.\n"
            "The program will now exit.");
        return -1;
    }

    int maxTextureSize = 1024;
    QGLWidget *widget = new QGLWidget(QGLFormat(QGL::SampleBuffers));
    widget->makeCurrent();

    if (!necessaryExtensionsSupported()) {
        QMessageBox::critical(0, "OpenGL features missing",
            "The OpenGL extensions required to run this demo are missing.\n"
            "The program will now exit.");
        delete widget;
        return -2;
    }

    // Check if all the necessary functions are resolved.
    if (!getGLExtensionFunctions().resolve(widget->context())) {
        QMessageBox::critical(0, "OpenGL features missing",
            "Failed to resolve OpenGL functions required to run this demo.\n"
            "The program will now exit.");
        delete widget;
        return -3;
    }

    // TODO: Make conditional for final release
    QMessageBox::information(0, "For your information",
        "This demo can be GPU and CPU intensive and may\n"
        "work poorly or not at all on your system.");

    widget->makeCurrent(); // The current context must be set before calling Scene's constructor
    Scene scene(1024, 768, maxTextureSize);
    GraphicsView view;
    view.setViewport(widget);
    view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
    view.setScene(&scene);
    view.show();

    return app.exec();
}
Пример #2
0
int emscriptenQtSDLMain(int argc, char *argv[])
#endif
{
    QApplication *app = new QApplication(argc, argv);

    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
//! [0]
//! [1]
    QGraphicsScene *scene = new QGraphicsScene(-200, -200, 400, 400);

    for (int i = 0; i < 10; ++i) {
        ColorItem *item = new ColorItem;
        item->setPos(::sin((i * 6.28) / 10.0) * 150,
                     ::cos((i * 6.28) / 10.0) * 150);

        scene->addItem(item);
    }

    Robot *robot = new Robot;
    robot->scale(1.2, 1.2);
    robot->setPos(0, -20);
    scene->addItem(robot);
//! [1]
//! [2]
    GraphicsView *view = new GraphicsView(scene);
    view->setRenderHint(QPainter::Antialiasing);
    view->setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
    view->setBackgroundBrush(QColor(230, 200, 167));
    view->setWindowTitle("Drag and Drop Robot");
#if defined(Q_OS_SYMBIAN)
    view->showMaximized();
#else
    view->show();
#endif

    return app->exec();
}