I have run across a weired problem: I am using a wxTreeCtrl with a model for each tree node. The tree expands "lazily" and each time a node is expanded, its children (Views) are completely rebuilt, creating new IDs. The children register their respecive models using two self written classes "Model" and "View". I should note, that when collapsing, I delete children in a brute-force way, using CollapseAndReset().
Each time a node is collapsed and expanded old nodes are deleted and new nodes (Views) are created, but the old ones are still registered as views for their models. When such a model issues a self.changed() all their views try to update themselves. But some of them are already gone and no longer tree nodes of my tree. Trying to update their labels gives me a SIGSEGV. I had similar problem with other widgets, but there I get a wx._core.PyDeadObjectError which I could handle easily. But the tree just gives me a SIGSEGV. So I have two options: either delete tree nodes more gently doing all the cleanup work, or figure out if a tree item is still part of the tree before the SIGSEGV gets me. The first will definitely require some sort of tree traversal, the second maybe not. But I haven't found a way to do this. If I am totally off the paved road, please tell me so. -- http://mail.python.org/mailman/listinfo/python-list
