Calculate FPS with QGLWidget - paintGL() is not called

qtd1d1

Hi,

I am trying to calculate the fps of my application. I know in general how to do it, but my implemented QGLWidget doesn't work properly. The paintGL() Method doesn't get called.

That' how my own Widget GLWidget looks like:

GLWidget.h
@#include <QGLWidget>
#include <QTime>

class GLWidget : public QGLWidget {

Q_OBJECT

public:
GLWidget(QWidget *parent = 0 );

protected:
void paintGL ();

private:
int m_frameCount;
QTime m_time;

};@

GLWidget.cpp

@#include "glwidget.h"
#include <QDebug>

GLWidget::GLWidget(QWidget *parent)
: QGLWidget(parent)
{
m_frameCount = 0;
}

void GLWidget::paintGL()
{
if (m_frameCount == 0) {
m_time.start();
} else {
qDebug("FPS is %f ms\n", m_time.elapsed() / float(m_frameCount));
}
m_frameCount++;

qDebug() << "frameCount: " << m_frameCount;
QGLWidget::paintGL();

}
@

And that's my main.cpp

@int main(int argc, char *argv[])
{
QApplication a(argc, argv);

QGraphicsScene scene;


QGraphicsView view(&scene);

GLWidget *gl = new GLWidget();

view.setViewport(gl);
view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);

view.show();

return a.exec&#40;&#41;;

}@

My problem is that it works hardware accerlated but the paintGL() Method doesn't get called...

Any Ideas?
Thanks