Wiley-World.of.Warcraft.Programming.A.Guide.and.Reference.for.Creating.WoW.Addons

Chapter 26 ■ Creating Unit Frames with Group Templates 511the unit’s name is on the OVERLAY layer, before graphical layers are checked,frame levels are used to layer the graphics. Because both of the status bars arechildren of the unit frame, they are at least one frame level higher than thebutton, causing the textures for the status bars to appear above the font string.There is no good way to fix this, but one way is to manually lower the framelevel of the status bars to match the main button. This may not work in allcases, but in these simple unit frames it works quite well.Nudging Frame LevelsBecause the status bar frame levels only need to be adjusted when the frame isfirst created, this is a great place to utilize initialConfigFunction.Atthetopof SquareUnitFrames.lua, add the following function definition:function SquareUnitFrames_InitialConfig(frame)-- Nudge the status bar frame levels downframe.unit.healthBar:SetFrameLevel(frame.unit:GetFrameLevel())frame.unit.powerBar:SetFrameLevel(frame.unit:GetFrameLevel())endThen, right before the line that calls SquareUnitFrames_Header:Show():SquareUnitFrames_Header.initialConfigFunction = iSquareUnitFrames_InitialConfigNow whenever a frame is created, the initial configuration function is calledand the frame levels are nudged so the frame displays correctly. Figure 26-2shows SquareUnitFrames at this stage, with the names and colored status barsvisible.Figure 26-2: SquareUnitFrames showing the player frame, after nudging frame levels.Responding to Events and ClicksThe names are a bit squished and the frames don’t actually update when theplayer’s health or power change, but if you have people leave and join yourparty you should see the frames reconfiguring during combat. This sectionmakes the frames a bit more responsive by responding to events.Targeting the Unit on Left-ClickCurrently when you click the unit frames, they do nothing other than eat themouse click. As you learned in Chapter 15, you can fix this by setting attributes