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02-01-10, 02:22 AM   #1
zork
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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.
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Last edited by zork : 02-01-10 at 02:26 AM.
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