[PyQt] segmentation fault

[David Boddie]

On Friday 19 October 2007 08:12:54 +0200, lucaberto wrote:

> > > ? ? def file_information(self):
> > > ? ? ? ? val = self.treeWidget.currentItem()
> > > ? ? ? ? indice = self.treeWidget.indexFromItem(val, 0)
> > >
> > > in this instruction :
> > >
> > > indice = self.treeWidget.indexFromItem(val, 0)
> >
> > Can you tell us what "val" contains? Is it "None"?
>
> The value of val is:<PyQt4.QtGui.QTreeWidgetItem object at 0x2abf1e34ee20>

That's strange, but I think I can see what the problem is.

Looking back at your previous message, you write this:

  class Form(QWidget, Ui_Form):
      """
      Class documentation goes here.
      """
      def __init__(self, parent = None):
          """
          Constructor
          """
          QWidget.__init__(self, parent)
          self.setupUi(self)
          self.modello = QtGui.QDirModel()
          self.treeWidget.setModel(self.modello)

Is self.treeWidget an instance of QTreeWidget? I'm assuming it is because
you later write

      def file_information(self):
          val = self.treeWidget.currentItem()
          indice = self.treeWidget.indexFromItem(val, 0)

The problem is that you set a new model on a QTreeWidget instance, and it's
not designed to be used that way. QTreeWidget provides a nice, convenient,
item-based class that can be used to create trees of items. Internally, it
has its own model, and it's a subclass of QTreeView so it provides the
setModel() method, but you're not really supposed to give it a new model
to work with - it just doesn't expect it.

You should really use QTreeView with QDirModel, though I appreciate that
you may miss the item-based API that QTreeWidget provides.

David