QGraphicsWidget vs. QGraphicsRectItem

**Bill** · 24th July 2009, 14:45

Hello,
I've got a question concerning the QGraphicsWidget. I used QGraphicsRectItem before as a base class for MyRectangle class. Now I switched to QGraphicsWidget and as it seems the rectangles on the scene are ~4px above the expected position (as compared to QGraphicsRectItem)...
Why is that? Is it possible to correct this situation?

Thanks,
Regards,
Bill

**Lykurg** · 24th July 2009, 15:07

Why have you changed, because a QGraphics_XYZ_Item is in the most cases the better option since it is "lighter" than a QGraphicsWidget.

QGraphicsWidget should be positioned like every other item but be aware of the widget's window frame margins and widget's contents margins.

**wagmare** · 27th July 2009, 07:19

i think its because of ContentsMargins of QGraphicsProxyWidget
check this link
http://doc.trolltech.com/4.5/qgraphicsproxywidget.html

**Bill** · 27th July 2009, 09:02

Originally Posted by Lykurg

Why have you changed, because a QGraphics_XYZ_Item is in the most cases the better option since it is "lighter" than a QGraphicsWidget.

QGraphicsWidget should be positioned like every other item but be aware of the widget's window frame margins and widget's contents margins.

Hi,
I had to switch to QGraphicsWidget because I was struggling to draw a resize handle on my custom QGraphicsRectItem. I will only have around 10 items on the scene, so I think the performance should be ok...

Thanks for your help, I'll try to investigate the QGraphicsProxyWidget properties.

Regards,
Bill