QGraphicsview size is 30 x 100

[szisziszilvi]

Hi,

I have the very same problem described here:
http://stackoverflow.com/questions/5...-qgraphicsview

I would like to get the size of the QGraphicsView placen on the ui. Its size is not constant az it is in a layout. You can see in the attechment what I have now. Unfortunatelly I constantly get 30 as height and 100 as width. Where can I have a correct value? If I break teh layout the very same code works fine but it is not stretchable then.