[PyQt] QTreeView access violation
dwagen at stonethree.com
Thu Sep 13 09:53:49 BST 2007
I have the following problem when performing the following steps in
* I have a QTreeView using a custom model.
* I expand a node that contains a bunch of items.
* I select one of the items (children) by clicking on it.
* I then edit the name of the item in-place (custom setData()
* I signal a dataChanged() event.
* I send a signal from somewhere else that the parent must be refreshed.
* The parent removes all its children (removeRows()) and re-populates.
* CRASH!! (only sporadically)
Qt gives my one of these:
"Qt has caught an exception thrown from an event handler. Throwing
exceptions from an event handler is not supported in Qt.
You must reimplement QApplication::notify() and catch all exceptions
A Visual Studio debugger Window pops up and it seems that an access
violation took place!
Re-implementing notify() DOES NOT catch the access violation. How can I
catch access violations
I am not 100% sure about this, but it seems to have something to do with
the fact that a selected item gets removed.
If I call clearSelection() before removing the rows, the violation does
not happen! This feels like a bit of a hack. What is the
correct way to handle this?
Dirk Wagener <dwagen at stonethree.com>
(MSc. Electronic Engineering, Stell.)
Stone Three Signal Processing (Pty.) Ltd.
+27 21 851 3123 (phone)
+27 21 851 3127 (fax)
We shall not cease from exploration and the end of all our exploring will
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