window.cpp Example File

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 #include <QtGui>
 #include "glwidget.h"
 #include "widget.h"
 #include "window.h"

 Window::Window()
     : QWidget()
 {
     Widget *native = new Widget(&helper, this);
     GLWidget *openGL = new GLWidget(&helper, this);
     QLabel *nativeLabel = new QLabel(tr("Native"));
     nativeLabel->setAlignment(Qt::AlignHCenter);
     QLabel *openGLLabel = new QLabel(tr("OpenGL"));
     openGLLabel->setAlignment(Qt::AlignHCenter);

     QGridLayout *layout = new QGridLayout;
     layout->addWidget(native, 0, 0);
     layout->addWidget(openGL, 0, 1);
     layout->addWidget(nativeLabel, 1, 0);
     layout->addWidget(openGLLabel, 1, 1);
     setLayout(layout);

     QTimer *timer = new QTimer(this);
     connect(timer, SIGNAL(timeout()), native, SLOT(animate()));
     connect(timer, SIGNAL(timeout()), openGL, SLOT(animate()));
     timer->start(50);

     setWindowTitle(tr("2D Painting on Native and OpenGL Widgets"));
 }