WoWInterface - Hooking Blizzard Widgets/Functions

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.

Code:

  ----------------------

  --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.