How to show Activity Diagram, using Python?

[AlexanderScheqolev]

Hi.
I have met some questions, working with Python library.
I know, how to show and get image of a usual diagram, but how can we get an Activity Diagram?

[danyeaw]

Hi @AlexanderScheqolev, thanks for the question!

You can get a certain type of diagram by setting the diagram's diagramType attribute. For example, to create a UML Activity Diagram with an actvity drawn in it:

from gaphor import UML
from gaphor.core.modeling import Diagram, ElementFactory
from gaphor.diagram.drop import drop
from gaphor.extensions.ipython import auto_layout, draw

element_factory = ElementFactory()

act_diagram = element_factory.create(Diagram)
act_diagram.name = "Process Controller"
act_diagram.diagramType = "act"

activity = element_factory.create(UML.Activity)
activity.name = "Control Process"
drop(activity, act_diagram, 0, 0)

auto_layout(act_diagram)
draw(act_diagram, format="svg")

[AlexanderScheqolev]

Thank you for your answer @danyeaw !

However, I also want to know one thing. Can I get elements from diagram and what module i should use?