def index(self, row, col, parent=QModelIndex()):
"""Returns the index of the item in the model specified
by the given row, column and parent index."""
if parent.isValid() and parent.column() != 0:
return QModelIndex()
parentPref = self.index2Pref(parent)
childPref = parentPref.qt_get_child(row)
if childPref:
return self.createIndex(row, col, childPref)
else:
return QModelIndex()
def parent(self, index=None):
"""Returns the parent of the model item with the given index.
If the item has no parent, an invalid QModelIndex is returned."""
if index is None: # Overload with QObject.parent()
return QObject.parent(self)
if not index.isValid():
return QModelIndex()
nodePref = self.index2Pref(index)
parentPref = nodePref.qt_get_parent()
if parentPref == self.rootPref:
return QModelIndex()
return self.createIndex(parentPref.qt_parents_index_of_me(), 0,
parentPref)
def index2Pref(self, index=QModelIndex()):
""" Internal helper method """
if index.isValid():
item = index.internalPointer()
if item:
return item
return self.rootNode
def columnCount(self, parent=QModelIndex()):
parentPref = self.index2Pref(parent)
return parentPref.qt_num_cols()
def rowCount(self, parent=QModelIndex()):
parentPref = self.index2Pref(parent)
return parentPref.qt_num_rows()