Light items for the graphicsView

[kernel_panic]

By default, QGraphicsView provides a regular QWidget for the viewport widget. You can access this widget by calling viewport(), or you can replace it by calling setViewport(). To render using OpenGL, simply call setViewport(new QGLWidget). QGraphicsView takes ownership of the viewport widget.

Yep!

[maverick_pol]

Yes I know that, but after including the headers (ading QT+=opengl) in the pro. when I compile(it ok, no errors) and run it I get unhandled exception in this line:
m_view->setViewport(new QGLWidget).

: )

[kernel_panic]

hmmm....
me not....
where do you call it?
bevore initialisation of your view, or bevore setupUi() ??

[maverick_pol]

I have added that line just after creating the view, after setting all the data(scene), etc. but still it crashes just 1 sec after the app starts to run.
Just run it in the debug mode, and the line is not invoking the error directly(because while running) compiler goes smoothly through that line, but then crashes after a sec.

Maverick

[spud]

Even if you are not using OpenGL, rendering 100 simple items shouldn't be a problem at all. Chances are you are doing something wrong. Try adding 100 pixmap items and see if that's slow. If not you need to show us some code, or at least a screen shot of the kind of scenario you are creating (how big images. how many are visible at the same time...).
And another thing. Why is moving the mouse slowing down your app? Are you reacting on hover events?