How do I natively move a QWidget top-level window?

[codeslicer]

Is there any way I can "natively" move a QWidget? For example, Windows can use the gray rectangle when you move a window, while an X11 setup with Compiz can use Wobbly Windows. On X11(Ubuntu 7.10), moving the window by just using:

void myapp::mousePressEvent(QMouseEvent *event) {
	if (event->button() == Qt::LeftButton) {
		dragPosition = event->globalPos() - frameGeometry().topLeft();
		event->accept();
	}
}
 
void myapp::mouseMoveEvent(QMouseEvent *event) {
	if (event->buttons() & Qt::LeftButton) {
		move(event->globalPos() - dragPosition);
		event->accept();
	}
}

void myapp::mousePressEvent(QMouseEvent *event) {
	if (event->button() == Qt::LeftButton) {
		dragPosition = event->globalPos() - frameGeometry().topLeft();
		event->accept();
	}
}

void myapp::mouseMoveEvent(QMouseEvent *event) {
	if (event->buttons() & Qt::LeftButton) {
		move(event->globalPos() - dragPosition);
		event->accept();
	}
}

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makes it directly paint every time it is dragged, however moving it while pressing and holding the Alt-key yields the wobbly effect. Is there any way I can natively move the window without requiring the user to, for example, hold the Alt key, or is this out of the question?

Thanks in advance ~codeslicer