RDX has a builtin click system and has everything you need.
RDX unitframes have always three clickable fields.
Health bar (bindings heal or dmg)
Power bar (bindings player or target)
cast bar (bindings decurse or interrupt)
Unlock your desktop.
Right click on a window and select edit bindings.
More informations here:
http://www.wowrdx.com/usage-guides/m...indings-editor
