def init_view(self):
self.btree_scene = QGraphicsScene()
self.btree_view = NodeEditorView(self.btree_scene)
self.btree_view.setAttribute(Qt.WA_DeleteOnClose)
self.btree_scene.setSceneRect(AREA)
self.vm = NodeEditorVM(self.model, self.btree_view, self.btree_scene,
self)
