Callback on_change of TextField is not triggered when its value has been set programmatically

[RobertNeher]

Callback:

def copyValue(e):
           goalField.value = e.control.value
           goalField.update()

Question:
Setting the value of a TextField programmatically (see code above), does not fire the event/callback on_change in target TextField
Is this by intent?

[ndonkoHenri]

That's normal, I think.
To resolve your problem, you have to call your on_change callback, and pass None as the parameter;

def copyValue(e):
       goalField.value = e.control.value
       goalField.update()
       your_on_change(None)

Let me know if it resolved your issue.