#include <stdio.h>

#include <QApplication>
#include <QAbstractScrollArea>
#include <QResizeEvent>
#include <QRect>
#include <QPoint>

class MyWindow : public QAbstractScrollArea
{
    typedef QAbstractScrollArea Qtsuper;

    void printMetrics()
    {
        QRect _g=geometry();
        QRect _f=frameGeometry();
        QPoint _topLt=viewport()->mapToGlobal(QPoint(0, 0));

        printf("geometry(): left=%d, top=%d width=%d height=%d\n",
            _g.left(), _g.top(), _g.width(), _g.height());

        printf("frameGeometry(): left=%d, top=%d width=%d height=%d\n",
            _f.left(), _f.top(), _f.width(), _f.height());

        printf("viewport top left (screen coords) x=%d y=%d\n",
            _topLt.x(), _topLt.y());

        printf("\n");
    }

    void mousePressEvent(QMouseEvent *event)
    {
        Qtsuper::mousePressEvent(event);
        if(event->button()==Qt::LeftButton)
        {
            setGeometry(QRect(-4, -23, 640, 480));
            printMetrics();
        }
    } 
};

int main(int argc, char *argv[])
{
    QApplication _app(argc, argv);
    MyWindow wid;
    wid.show();
    return _app.exec();
}