R – How to listen to a RoutedEvent from a class that doesn’t derive from FrameworkElement ? Can it be done

Sorry... WPF's implementation of the EventTrigger only allows one routed event.

Typically you would be firing a storyboard from a routed event. I would suggest the following compromise:

<!--Define a storyboard as a resource-->
<Storyboard x:Key="MyStoryboard1">
   <!--Many properties and etc...-->
</Storyboard>

<Style.Triggers>
   <EventTrigger RoutedEvent="Button.MouseEnter">
      <BeginStoryboard Storyboard="{StaticResource MyStoryboard1}">
         <!--Other properties/name if necessary-->
      </BeginStoryboard>
   </EventTrigger>
   <EventTrigger RoutedEvent="Button.MouseDown">
      <BeginStoryboard Storyboard="{StaticResource MyStoryboard1}">
         <!--Other properties/name if necessary-->
      </BeginStoryboard>
   </EventTrigger>
</Style.Triggers>

The concept is to reduce duplicate code by sharing resources.

Hope this helps!

1. Implement a method to be called from the event handlers of the Button and StackPanel's.
2. Sets the Handled property of the args to false.

3. Or you can have a Boolean parameter in your GenericHandler method so that you can decide whether it should let the event bubble.

   void GenericHandler(object sender, RoutedEventArgs args)
   

   { // Check for the type of the args here and do your work.

   args.Handled = false; // this lets the event bubbled up.
   ...
   

   }