I'm trying to create mouseover cast functionality to my unit frames, working essentially the same way VuhDo works for party and raid frames. An example of desired functionality: when hovering over my Boss1 frame, I would like to be able to cast dots on boss1 unit by simply pressing an assigned hotkey, not needing to click the unit and switch targets. [EDIT]: This is specifically for keybinds, not mouse clicks.
Regular mouseover macros don't quite cut it in my case, and I would really like to learn how to implement this kind of functionality properly.
I've gotten to the point where I think I'm quite close to my goal, but the implementation is very clunky and has a few problems. My code so far:
-- a is helper table
a.unit = "focus" -- Frame is focus for testing purposes
a.unitFrameName = "MyFocusFrame"
a.unitFrame = _G[a.unitFrameName]
-- Using SecureUnitButtonTemplate for easy unit frame functionality, EnterLeave for mouse enter/leave
local b = a.unitFrame or CreateFrame("Button", a.unitFrameName, UIParent, "SecureUnitButtonTemplate, SecureHandlerEnterLeaveTemplate")
b:SetPoint("CENTER", UIParent, "CENTER", 0, 0) -- Temp test position and size
local tex = b:CreateTexture(nil) -- To see my frame
tex:SetColorTexture(1, 0, 0)
b.unit = a.unit
-- SetScripts disable the _onenter and _onleave state handlers
local b = self:GetFrameRef("b")
--local unit = self:GetAttribute("unit")
b:SetBindingMacro(nil, "G", "Flash Heal macro") -- Where said macro is "/use [@mouseover] Flash Heal"
b = self:GetFrameRef("b")
print("Mouse left Focus frame") -- testing
b:ClearBindings() -- Clear override bindings on leave
My logic is to create an override binding macro when my mouse enters the frame, and clear it once the mouse leaves. I added SecureHandlerEnterLeaveTemplate to inherit from for that purpose. It seemed like a sensible solution and the example macro is actually working; I'm able to cast Flash Heal on my focus target when I press G and my mouse is above my focus frame.
However, I don't know if this is the best solution by any means, and I have a few problems and questions:
1) To be able to assign macros to SetBindingMacro, those macros have to exist in my macros. Is there a way to create them locally within the frame, maybe using macrotext attributes or something? Otherwise this will be a pain with multiple characters and different frames. I know Vuhdo is able to do it, I just don't understand how.
2) How should I handle GameTooltip? AFAIK I can't do anything to it in restricted environment, and using SetScript overrides my state handlers. Should I have two separate frames for that?
3) Would there be some other, entirely different solution to achieving my goal? E.g. some other handlers or using virtual button clicks etc.
Overall I feel like I'm close, but at the moment stuck and I just can't seem to figure out a way to get forward. I've spent hours trying to get hints reading the source of Vuhdo, Clique, Healbots and FrameXML, but honestly I couldn't get much out of any of those :/