[PyQt] Dumb question about QDirModel / setModel

[Nicolas Girard]

Hi,
could someone tell me why this works...:

#!/usr/bin/python
from PyQt4 import QtGui
import sys

class Window(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.tree = QtGui.QTreeView(self)
    def setModel(self,model):
        tree=self.tree
        tree.setModel(model)
        tree.resize(640, 480)

if __name__=="__main__":
    app=QtGui.QApplication(sys.argv)
    window=Window()
    model = QtGui.QDirModel()
    window.setModel(model)
    window.show()
    sys.exit(app.exec_())

... whereas this doesn't...?

#!/usr/bin/python
from PyQt4 import QtGui
import sys

class Window(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.tree = QtGui.QTreeView(self)
        model = QtGui.QDirModel()
        self.setModel(model)
    def setModel(self,model):
        tree=self.tree
        tree.setModel(model)
        tree.resize(640, 480)

if __name__=="__main__":
    app=QtGui.QApplication(sys.argv)
    window=Window()
    window.show()
    sys.exit(app.exec_())


Many thanks in advance,
cheers,
Nicolas