Abstraction required in Class

[salmanmanekia]

in the code above, i mean its in the code which i pasted in my last reply..

[jacek]

I don't see it.

[salmanmanekia]

i forgot...but its like

setScene(mainScn);

setScene(mainScn);

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in TrainingUI constructor..

[jacek]

OK, what happens if you add mainScn->addLine( 0, 0, 100, 100 ) to the TrainingUI constructor?

[salmanmanekia]

It works,i mean the line is shown i also changed the background of the view so for now i can see the line ,i can also see the background,but there is a grey window(empty window) over the background...in my implementation instead of grey window there should be my navigate widget...

[salmanmanekia]

its solved ,i had to add setParent the MainWidget class in the Naigation class..