What EVENT fires when UI elements are ready?

[LudiusMaximus]

TimeManagerClockButton:SetScript("OnClick", function (self, button)
  print("Do some stuff.")
  TimeManagerClockButton_OnClick(self)
end)

This in the beginning of my addon does not work, because TimeManagerClockButton is not yet known.

The following works, but is PLAYER_ENTERING_WORLD really the proper event to use?

local startupFrame = CreateFrame("Frame")
startupFrame:RegisterEvent("PLAYER_ENTERING_WORLD")
startupFrame:SetScript("OnEvent", function(self, event, ...)
  
  TimeManagerClockButton:SetScript("OnClick", function (self, button)
    print("Do some stuff.")
    TimeManagerClockButton_OnClick(self)
  end)
  
end)

[Kanegasi]

Blizzard_TimeManager.toc sets the time manager as LoadOnDemand, so it is not loaded initially.

UIParent attempts to load it twice, early if an alarm is enabled, then a second time at PLAYER_LOGIN:

function UIParent_OnEvent(self, event, ...)
    
    ...
    
    elseif ( event == "VARIABLES_LOADED" ) then
    
    ...
    
        if ( not TimeManagerFrame and GetCVar("timeMgrAlarmEnabled") == "1" ) then
            -- We have to load the time manager here if the alarm is enabled because the alarm can go off
            -- even if the clock is not shown. WorldFrame_OnUpdate handles alarm checking while the clock
            -- is hidden.
            TimeManager_LoadUI();
        end
    
    ...
    
    elseif ( event == "PLAYER_LOGIN" ) then
        TimeManager_LoadUI();

If it still somehow didn't load, TimeManager_LoadUI() is called when /stopwatch is used.

Since it should load at PLAYER_LOGIN, I suggest watching ADDON_LOADED like the Stopwatch does:

function StopwatchFrame_OnEvent(self, event, ...)
    if ( event == "ADDON_LOADED" ) then
        local name = ...;
        if ( name == "Blizzard_TimeManager" ) then

Or just force it with TimeManager_LoadUI() a frame before your code.

[LudiusMaximus]

Cool, thanks!

ADDON_LOADED with Blizzard_TimeManager works perfectly!