Quote Originally Posted by wysota View Post
Yes, it might be.



There are at least three different ways to handle your situation. One possibility is to render contents of your item to a pixmap and only update the pixmap when you're not moving the item and if you are then render the old contents. Second possibility is to enable one of the caching modes for the item which does essentially more or less the same. I forgot the third solution

Hi, I have solved this problem through your second method.
i am very grategful for your help. But i fill confused with the first method.Can you explain for me more specifically? when the size of pixmap is in line with the size of the qgraphicsItem, while update the pixmap whether the qgraphicsItem will also being updated?

i'm looking forwad to hearing from you soonly.