[Interest] Synchronous painting on QGraphicsScene

[Patrick Stinson]

Hi there!

I have a graph-ish diagram app where dragging some objects (like nodes) necessitates dragging other objects (like connecting edges). However, if I update an edge from the mouse event or ItemChanged(position) event then the edge isn’t painted until the next paint event. At times, this is quite obvious for example when nudging a node with an arrow key and the node is going in one direction and edge goes in the other direction for one frame because it is one buffer behind.

Any thoughts on synchronous painting?

Thank you
-Patrick
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