def GetParent(self, item):
index = self._to_index(item)
if index == Root:
return DataViewItem()
parent, row = self.model.index_manager.get_parent_and_row(index)
parent_id = self.model.index_manager.id(parent)
if parent_id == 0:
return DataViewItem()
return DataViewItem(parent_id)
def GetChildren(self, item, children):
index = self._to_index(item)
row_index = self.model.index_manager.to_sequence(index)
n_children = self.model.get_row_count(row_index)
for i in range(n_children):
child_index = self.model.index_manager.create_index(index, i)
child_id = self.model.index_manager.id(child_index)
children.append(DataViewItem(child_id))
return n_children
def _to_item(self, row_index):
if len(row_index) == 0:
return DataViewItem()
index = self.model.index_manager.from_sequence(row_index)
id = self.model.index_manager.id(index)
return DataViewItem(id)