Here are a couple of ideas that might help:
1. Use the map layers and remove the dual axis, that way there's no gray shape to click on. It looks a bit different that the original model (that I really like BTW!), but it still adds the context for the towns:
2. Keep the dual axis but modify the action so that a filter is applied only if a town is selected. This looks just like the original model, and while the user can still click on the gray shape, no view is filtered. The workbook attached has this setup.
Hope this helps!
Thanks for your input, Santiago... this is closer, but it doesn't quite do the trick. The problem is, I can still click on the background area of the state, and when I do, the towns disappear from view even though not filtered out.
Oops! It didn't filter out the towns, but they're not visible anymore. It looks like the click "pulls" the state map to the front. I need to have it stay in the back, even if you click on it. Is this possible?
Yeah, that's the drawback with option 2. Option 1 doesn't draw a mark, therefore you can't click on anything but the tows.
You may be able to make the state map more noticeable if you use a custom image, as explained here: Use Background Images in Your Views.