def _render_dotgraph(self, dotgraph):
"""
Render the specified dotgraph on canvas
:type dotgraph: pydot.Dot
"""
# Only redraw when the graph differs from the previous one
if self._prev_dotgraph == dotgraph:
return
else:
self._prev_dotgraph = dotgraph
self._scene.clear()
if self._widget.highlight_connections_check_box.isChecked():
highlight_level = 3
else:
highlight_level = 1
# Generate qt items from dotcode
dotcode = PydotFactory().create_dot(dotgraph)
nodes, edges = DotToQtGenerator().dotcode_to_qt_items(
dotcode, highlight_level, same_label_siblings=False)
# Add generated items to scene
for node_item in nodes:
self._scene.addItem(nodes.get(node_item))
for edge_items in edges:
for edge_item in edges.get(edge_items):
edge_item.add_to_scene(self._scene)
self._scene.setSceneRect(self._scene.itemsBoundingRect())
