Click event dispatches to wrong control

We have the requirement that on some nondeterministic fired hardware events, depending on the event, the GUI changes. Due to the GUI complexity this may take a few seconds.

Now the problem. If I click on a button while GUI is still busy sometimes the wrong button is invoked because after GUI layouting this button is now at the mouse coordinates where the click occurred before.

Iam sure with Windows Forms the behavior was different. Can I get around this behavior?

Solution

You can :

Hide or cover the UI when it is refreshing (with a Busy Indicator for example)
Optimize the refresh (see MSDN Wpf Optimization category, especially Layout and design)
The quick and dirty - store a IsRefreshing variable and use it to diable the buttons or cancel your buttons handlers

EDIT

The real question is : what is your bottleneck ? the UI refresh or the logic behind ?