yes, you can set the visibility based on attribute on region field.
That is possible. What you'll need is two attributes (which you have) and two dropdowns: one for the RegionType and one for the Region. You can constrain the latter on the first or use conditional visibility or conditional editability for the second dropdown based on the value of the first. Any validations (i.e. if RegionType = Regional → Region != empty) can be handled in the validations microflow.
I made a small demo – you can view how it works here: https://youtu.be/ui6WG_q2QMg
If this is what you want, here is how I created this:
I created 2 enumerations:
And added those enumerations as attributes on an entity:
Here is the new/edit page with conditional visibility:
And here is the visibility condition on the Region radio button:
Hope that helps,
Very cool. It appears that the Mendix way of doing this is through the control overlay.
I appreciate your taking the time to illustrate this. I will try to implement it.