Heroic Strike icon border when queued

[jeginbuci]

Hi, this is for the Readyspells addon. The author, Aldmehr, said he would implement this feature if somebody will give him the code.

He has defined the following variable:

local icon = GetSpellTexture(id, BOOKTYPE_SPELL)

and when the next swing is activated or that spell is on GCD he greys it :

texture:SetVertexColor(0.4, 0.4, 0.4, self.db.profile.alpha - 0.2)

What i am trying to find out is how to make this icon behave like the regular blizz action bar buttons : white/yellow border on next swing activation buttons like Heroic Strike, Maul, Cleave etc and an "image clock" ungreying it on global cooldown.

Any help will be very much apreciated.