source: trunk/demos/qtdemo/mainwindow.cpp@ 493

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** Contact: Qt Software Information ([email protected])
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** This file is part of the demonstration applications of the Qt Toolkit.
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#include "mainwindow.h"
#include "menumanager.h"
#include "colors.h"
#include "dockitem.h"
#include "demotextitem.h"
#include "imageitem.h"
#include "demoitem.h"
#include "demoscene.h"

#ifndef QT_NO_OPENGL
    #include <QGLWidget>
#endif
//#define QT_NO_OPENGL

MainWindow::MainWindow(QWidget *parent) : QGraphicsView(parent), updateTimer(this)
{
    this->currentFps = Colors::fps;
    this->loop = false;
    this->fpsMedian = -1;
    this->fpsLabel = 0;
    this->pausedLabel = 0;
    this->doneAdapt = false;
    this->useTimer = false;
    this->updateTimer.setSingleShot(true);
    this->trolltechLogo = 0;
    this->qtLogo = 0;
    this->setupWidget();
    this->setupScene();
    this->setupSceneItems();
    this->drawBackgroundToPixmap();
}

MainWindow::~MainWindow()
{
    delete this->trolltechLogo;
    delete this->qtLogo;
}

void MainWindow::setupWidget()
{
    QRect screenRect = QApplication::desktop()->screenGeometry(QApplication::desktop()->primaryScreen());
    QRect windowRect(0, 0, 800, 600);
    if (screenRect.width() < 800)
        windowRect.setWidth(screenRect.width());
    if (screenRect.height() < 600)
        windowRect.setHeight(screenRect.height());
    windowRect.moveCenter(screenRect.center());
    this->setGeometry(windowRect);
    this->setMinimumSize(80, 60);
    setWindowTitle(tr("Qt Examples and Demos"));
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setFrameStyle(QFrame::NoFrame);
    this->setRenderingSystem();
    connect(&this->updateTimer, SIGNAL(timeout()), this, SLOT(tick()));
}

void MainWindow::setRenderingSystem()
{
    QWidget *viewport = 0;

    if (Colors::direct3dRendering){
        viewport->setAttribute(Qt::WA_MSWindowsUseDirect3D);
        setCacheMode(QGraphicsView::CacheNone);
        if (Colors::verbose)
            qDebug() << "- using Direct3D";
    }
#ifndef QT_NO_OPENGL
    else if (Colors::openGlRendering){
        QGLWidget *glw = new QGLWidget(QGLFormat(QGL::SampleBuffers));
        if (Colors::noScreenSync)
            glw->format().setSwapInterval(0);
        glw->setAutoFillBackground(false);