QPropertyAnimation problem

[ahura_24]

hi every body . this is my code
@
#include <QtGui>

int main(int argc, char **argv)
{
QApplication app(argc, argv);

QWidget window;
window.resize(640, 480);

QPropertyAnimation pa(&window, "size");
pa.setStartValue(QSize(0, 0));
pa.setEndValue(QSize(640, 480));
pa.setDuration(1000);

pa.start();
window.show();

return app.exec();

}
@

i have one problem. if you run this code your window start in the uncorrect position because the property case that window resize to QSize(0, 0) in the begining. how can i fix it?
tnx