WoWInterface SVN bdGrid

--[[ Element: Leader Icon

 Toggles visibility based on the units leader status.

 Widget

 Leader - Any UI widget.

 Notes

 The default leader icon will be applied if the UI widget is a texture and

 doesn't have a texture or color defined.

 Examples

   -- Position and size

   local Leader = self:CreateTexture(nil, "OVERLAY")

   Leader:SetSize(16, 16)

   Leader:SetPoint("BOTTOM", self, "TOP")

   -- Register it with oUF

   self.Leader = Leadera

 Hooks

 Override(self) - Used to completely override the internal update function.

                  Removing the table key entry will make the element fall-back

                  to its internal function again.

]]

local parent, ns = ...

local oUF = ns.oUF

local Update = function(self, event)

        local leader = self.Leader

        if(leader.PreUpdate) then

                leader:PreUpdate()

        end

        local unit = self.unit

        local isLeader = (UnitInParty(unit) or UnitInRaid(unit)) and UnitIsGroupLeader(unit)

        if(isLeader) then

                leader:Show()

        else

                leader:Hide()

        end

        if(leader.PostUpdate) then

                return leader:PostUpdate(isLeader)

        end

end

local Path = function(self, ...)

        return (self.Leader.Override or Update) (self, ...)

end

local ForceUpdate = function(element)

        return Path(element.__owner, 'ForceUpdate')

end

local Enable = function(self)

        local leader = self.Leader

        if(leader) then

                leader.__owner = self

                leader.ForceUpdate = ForceUpdate

                self:RegisterEvent("PARTY_LEADER_CHANGED", Path, true)

                self:RegisterEvent("GROUP_ROSTER_UPDATE", Path, true)

                if(leader:IsObjectType"Texture" and not leader:GetTexture()) then

                        leader:SetTexture[[Interface\GroupFrame\UI-Group-LeaderIcon]]

                end

                return true

        end

end

local Disable = function(self)

        local leader = self.Leader

        if(leader) then

                leader:Hide()

                self:UnregisterEvent("PARTY_LEADER_CHANGED", Path)

                self:UnregisterEvent("GROUP_ROSTER_UPDATE", Path)

        end

end

oUF:AddElement('Leader', Path, Enable, Disable)