Anti-Caster Pop-up

[Worcester]

Here's the idea... your target starts casting a spell... wouldn't you love it if a customizable bar would appear, with buttons for your interrupt abilities that are not on Cool Down!

Some icing on the cake? Ideally you could move the bar where ever you wanted on the screen, and change it's size. I imagine this is mostly geared towards clickers, but hotkey support would be nice. If it's simply a button bar, you should be able to add abilities, spells and even items that can interrupt a cast, but it should only show the abilities that you can use at the moment. As a Rogue, for example, Kidney Shot would show up on the Interrupt bar only if you had a combo point on the target.

So that's my idea. I've seen something similar, but it didn't seem as versatile and appeared geared towards casters interrupting other casters. If this does exist, though, please let me know... and thanks for the help!