Problems with QGraphicsItems

[JonathanForQT4]

hey, thanks for your post Andreas!! I'm looking forward to when 4.3 is released, unfortunately I can't use 4.3, do you have any suggestions about how I could do this until 4.3 comes out? maybe putting a widget over the viewport or something and print on the widget?
I've tried this, but had troubles centering the widget/keeping it the same size as the viewport from the QGraphicsView and being able to click on the overlaying widget and having the viewport pick it up.
Any clues as to when 4.3 will be released?
in any case, thanks again

aamer4yu, tried calling update after this line, but that doesn't work. I am surprised because it should be the following that should cause it to disappear.
m_MeasureLine->hide();
m_MeasureLine->update();

Any other ideas?

another eidt://I have just tried adding the item each time to the scene and removing it from the scene each time....still doesn't work...