EventTrigger with Setter in WPF?

Question

I have a normal Button and TextBox in a WPF-Window and I want a Template for the Button with a EventTrigger that listens to Button.Click and then sets a boolean-property of

Answer 1

Here is a sample that sets and clears Focusable on a TextBox from an EventTrigger.
Hopefully you can adapt this example to your situation.