Change settings on another addon

[frohanss]

Hey,

im totaly new on the LUA part and i was woundering how i can make a "addon" that changes/override codes in another addon.

Like 1 of the changes im making to Recount:

From:

function me:SetFontSize(string, size)
	local Font, Height, Flags = string:GetFont()
	string:SetFont(Font, size, Flags)
end

To:

function me:SetFontSize(string, size)
	local Font, Height, Flags = string:GetFont()
	string:SetFont(Font, 11, Flags)
end

It's just a simple change to make fixed font size to not scale with bars.
Im making many small changes to addon's so it mach my UI better, and it's a pain to update addons since i must go over and make new changes after update.

If some can help with example it would be realy nice.

Thx in advance

[aiikachi]

Since I asked this question recently, I am going to link you to my thread in hopes that the answers I got can help you too:
http://www.wowinterface.com/forums/s...ad.php?t=38781

[hankthetank]

If you don't want to edit the code directly the basic technique here would be using hooks or replacements mostly. But it depends on some factors.

1) First of all if you can access the code from "outside". Good addon authors will do their best to keep most of the code local. There are some situations where you might be able to change parts anyway.

• Part of the code is global. This might be the case if the author wants to offer some kind of interface for outside access. Maybe there are parts of the namespace (see use of namespace table "..."), especially functions published to _G.
• You want to access UI elements. This one is easier especially when the frames are named.
  
  

  SomeAddonNamedButton:SetSize(100, 25)
  SomeAddonNamedButton:HookScript("OnClick", function(self) print("hi!") end)

  
  Otherwise you might be able to access anonymous elements by iterating :GetRegions() and :GetChildren(). If the main frame in question is anonymous too you will need to iterate through UIParent and scan for the frame by searching for a specific characteristic to match (for example frame title = "Recount")
  
  

  local anonAddonFrame, ADDON_FRAME_CAPTION = nil, "SomeAddon"
   
  function scan()
   
  for i = _, obj in pairs(({UIParent:GetChildren()})) do
      if type(obj) == table then
          if obj.GetObjectType and obj.GetObjectType == "frame" then
              for _, region in pairs(({frame:GetRegions()})) do
                  if region:GetObjectType() == "FontString" and region:GetText() == ADDON_FRAME_CAPTION then
                      print("i found it!")
                      anonAddonFrame = frame
                      return
                  end
              end
          end
      end
  end
   
  end

• The addon uses ace and defined a function as a member of the addon object. Example from Grid:
  

  _G.Grid = LibStub("AceAddon-3.0"):NewAddon(Grid, "Grid", "AceConsole-3.0", "AceEvent-3.0")
   
  function Grid:Debug(str, ...)
      ..........
  end

  
  In this situation you could include the ace addon library yourself and do something like:
  
  

  local grid = LibStub("AceAddon-3.0"):GetAddon("Grid")
   
  if grid then
      grid.Debug = function(self, str, ...)
          print("I'm in your Grid, messing with your debug messages")
      end
  end

2) You need to check the loading order to make sure that your modification loads after the regarding addon.

local function AlterSomeAddon()
    ........
end
 
if IsAddOnLoaded(someaddon) then
    AlterSomeAddon()
else
    local f = CreateFrame("Frame")
    f:RegisterEvent("ADDON_LOADED")
    f:SetScript("OnEvent", function(_, event, ...)
        if event == "ADDON_LOADED" and ... == someaddon then
            AlterSomeAddon()
        end
    end
end

[frohanss]

Thx for the reply. It looks totaly unknown to me atm. I'll try to dig into that and see what i can learn. And try to figure out how to use it to change recount first.

[Akkorian]

Hi Frohanss,

Unfortunately the Recount function you want to overwrite isn’t available from outside of the Recount file it’s defined in, so things are a little more complicated. This code should work.

Put this in your addon’s TOC file to make sure Recount loads before your addon:

## OptionalDependencies: Recount

Put this in your addon’s Lua file:

if Recount then
    local function setFont( fontstring, file, size, outline )
        -- Call the original SetFont method with a different size.
        fontstring:orig_SetFont( file, 11, outline )
    end
 
    local function hook( row )
        -- Save the font strings' original SetFont methods.
        row.LeftText.orig_SetFont = row.LeftText.SetFont
        row.RightText.orig_SetFont = row.RightText.SetFont
 
        -- Give the font strings new SetFont methods.
        row.LeftText.SetFont = setFont
        row.RightText.SetFont = setFont
    end
 
    if Recount.MainWindow then
        -- Recount already created its window, so you need to add hooks
        -- for any rows already created.
        for i, row in ipairs( Recount.MainWindow.Rows ) do
            hook( row )
        end
    end
 
    -- Hooking this function will hook any new rows as Recount makes them.
    local SetupBar = Recount.SetupBar
    function Recount:SetupBar( row )
        SetupBar( self, row )
        hook( row )
    end
end

[frohanss]

Thank you so much Akkorian for your example! It worked perfectly

[Aftermathhqt]

or you can do this way! works fine aswell.

local nButtons = CreateFrame("Frame", nil, UIParent)
nButtons:RegisterEvent("AddOn_LOADED")
nButtons:SetScript("OnEvent", function(self, event, AddOn)
    if AddOn == "AftermathhUI" then
         -- you are just in the way...
            _G["InterfaceOptionsBuffsPanelConsolidateBuffs"]:Hide()
        -- i have my own ui scale.
            _G["Advanced_UIScaleSlider"]:Hide()
            _G["Advanced_UseUIScale"]:Hide()
        -- no need since we are creating arena frames! O.O
            _G["InterfaceOptionsUnitFramePanelArenaEnemyFrames"]:Hide()
            _G["InterfaceOptionsUnitFramePanelArenaEnemyCastBar"]:Hide()
           _G["InterfaceOptionsUnitFramePanelArenaEnemyPets"]:Hide()
     elseif AddOn == "Bartender" then
        lets do some stuff herez!
     end
end)