When size of viewport is defined?

[alan73]

Hello!

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?

[adolby]

Here's an explanation of what may be happening to you:

http://qt-project.org/forums/viewthread/5084

You can likely use Volker's solution to overcome this.

Also, you can try calling show() first, then setGeometry() in your example, since you'll know someWidth and someHeight.

[alan73]

Thanks for reply! Maybe a bit later, but I'll try :)