On Sat Sep 4 08:00:06 BST 2010, Preisig, Heinz A wrote: > After upgrading Ubuntu 9.10 to 10.04 I encounter some problems with > running a graphics application I built last year. It uses the mechanisms > described in the example "elasticnodes". The two application represent a > graph, which when moving the nodes also update the location of the arcs. > > In both cases the arcs are not updated. In fact the example does not > show the arcs when starting it. My application does show the arcs, but > it does not update. I dug for some hours in the code, but could not find > a problem. It seems it does not get into the "itemChange" method of the > "QGraphicsItem" class. Some manipulations resulted in abortion of the > task, which when running from within Eclipse did not produce an error > message. From the terminal I got an occasional segmentation fault.
I don't know why you are getting segmentation faults, but the problem with the itemChange method is due to a change in behaviour in Qt 4.6. You now need to call the item's setFlag method with the ItemSendsGeometryChanges flag to get notifications when items move. David _______________________________________________ PyQt mailing list PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
