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

Chapter 16 ■ Binding Keys and Clicks to Addon Code 321You have just a couple more clerical matters to attend to before movingon to the binding functions. Fill in the Capture_OnLoad and Capture_OnShowfunctions as follows:function BindingTestCapture_OnLoad(self)self:RegisterForClicks(“AnyUp“)endfunction BindingTestCapture_OnShow(self)self.text:SetText(CAPTURE_TEXT:format(self.button:GetID()))endNow the frame is prepared to respond to any mouse click and also displaysinstructions for setting the binding as shown in Figure 16-9.Figure 16-9: Final binding test capture frameUsing SetBinding()With the housekeeping tasks out of the way, you can now concentrate onthe bindings themselves. The heart of the binding API is the SetBinding()function, which associates a key with a binding action:success = SetBinding(“key“[, “action“])The key parameter is a string representing the desired key press (for example,SHIFT-F5) andtheaction parameter is the name of the binding action youwant the key to trigger. If the action is omitted (or nil for clarity) the binding isremoved from the key. SetBinding() returns 1 or nil depending on whetherthe binding was successfully set.The capture frame knows what action to use by looking at its buttonfield, which was set by BindingTestButton_OnClick. SothemainjobofBindingTestCapture_OnKeyDown is to build the key parameter and callSetBinding(). Now, OnKeyDown captures every key individually, evenmodifier keys. Because you can’t bind modifier keys, you should ignore themby adding the following code to the end of the OnKeyDown function:local modifier = key:sub(2)if modifier == “SHIFT“ or