Hooking Blizzard Widgets/Functions

[zork]

For those of you who don't know this already.

It is possible to hook functions like "SetAlpha", "SetVertexColor" or "SetPoint" for a specific frame/button.

This comes in very handy if you rewrite Blizzard stuff and want to make sure it stays the way you want it.

Thanks to "hooksecurefunc" it won't cause tainting aswell.

  ----------------------
  --FUNCTIONS
  ----------------------
  
  local function am(text)
    DEFAULT_CHAT_FRAME:AddMessage(text)
  end

  local function mySetVertexColorFunc(self, r, g, b, a)
    --do stuff
    am("setvertexcol")
    if r then
      am(r)
    end
  end
  
  local function mySetStatusBarColorFunc(self, r, g, b, a)
    --do stuff
    am("setstatusbarcol")
    if r then
      am(r)
      if r > 0.3 then
        self:SetStatusBarColor(0.2,0.2,0.2,1)
      end
    end
  end  
  
  local function mySetAlphaFunc(self, a)
    --do stuff
    am("setalpha")
    if a then
      am(a)
    end
  end
  
  ----------------------
  --FRAMES
  ----------------------
  
  --set colors for any kind of frame/button
  frame1:SetVertexColor(1,0.2,0.2,1)
  frame2:SetStatusBarColor(0.2,0.2,1,1)

  ----------------------
  --HOOKS
  ----------------------

  --hook functions for that frame/button
  hooksecurefunc(frame1, "SetVertexColor", mySetVertexColorFunc)
  hooksecurefunc(frame1, "SetAlpha", mySetAlphaFunc)

  hooksecurefunc(frame2, "SetStatusBarColor", mySetStatusBarColorFunc)
  hooksecurefunc(frame2, "SetAlpha", mySetAlphaFunc)

That way you can rewrite anything Blizzard does again.

Think of a frame that you want to stay at Alpha(0.2) but Blizzard always sets it to Alpha(1), so just hook SetAlpha() and you can set it to "0.2" again.

[Torhal]

Originally Posted by zork That way you can rewrite anything Blizzard does again.

Not completely true - the original code still executes, directly before your code does.

[Lane]

Can you use this to get the Duration of Debuffs on your target and put them somewhere else? Or should I just write it separately and not worry about hooking Blizzards code?

[zork]

Debuffs are handled by the UnitAura event and your debuff could by any of target debuff buttons. You want http://www.wowinterface.com/download...-rFilter2.html or a mod alike.