Modal Operator not shuting down -- Possible memory leak?

Archive Python API
1

A small add-on test case found at

creates a NodeTree, where a TestNode with a button to start a Modal Operator can be added.

pushing the button invokes the operator ->

execute adds a timer and adds the operator to the window_manager ->

operator receives events.

So far so good.

but when the node is destroyed and a signal to destroy the operator is sent through a shared object the operator still receives events.

Is this supposed to happen? When is the operator destroyed?

2

Using CANCELED instead of CANCELLED as the return value may explain the problem.

3

Would have been nice – blender seems too ignore the return value –
even when I return not so nice values.

Thanks for finding the typo :wink: it was in the cancel method not in the destroy method :wink:

4

Once the Operator has reached it’ modal method it is only reacting to values returned by this method.

Possible return values are::
(‘RUNNING_MODAL’, ‘CANCELLED’, ‘FINISHED’, ‘PASS_THROUGH’, ‘INTERFACE’)

Yes, it’s ‘CANCELLED’ with two L

so the if clause in the modal method should read:

if self.Node_Context_ww_Data[“Destroy”]:
self.j = self.j +1
ret = self.destroy(context)
return ret

then the operator receives a couple of events (2 - 4) and then it exits gracefully