I'm writing app with QScrollArea and going to set scroll bars values. Here's a piece of code:

@
MyScrollArea::MyScrollArea() {
...
// create scrollarea's widget
CentralWidget = new QWidget(viewport());
setWidget(CentralWidget);

// set scrollarea's widget geometry
CentralWidget->setGeometry(0, 0, someWidth, someHeight);
CentralWidget->show();
CentralWidget->repaint();

// get viewport size
int viewWidth  = viewport()->width();
int viewHeight = viewport()->height();
//--------------------------------------------

}@

And got incorrect size of viewport: viewWidth = 28, viewHeight = 98. I consider that it's not defined yet, is it right?. When will I be able to get correct size?