How to augment GameTooltip for world objects

[Nimhfree]

I already augment the GameTooltip for NPCs using:

GameTooltip:HookScript("OnTooltipSetUnit", blah blah blah)

However, when the GameTooltip is being shown for a world object, it does not seem to be using OnTooltipSetUnit. Does anyone know what it is doing, or what I can do to call AddLine() appropriately?

[semlar]

I'm pretty sure the only way to identify an object's tooltip is by matching its contents to its localized name.

[Nimhfree]

Even that would be acceptable to a point as I have its localized name. What I need to know is when it is going to be shown. I do not know the mechanism that causes that to happen.

[semlar]

Originally Posted by Nimhfree Even that would be acceptable to a point as I have its localized name. What I need to know is when it is going to be shown. I do not know the mechanism that causes that to happen.

You can just hook its OnShow script.

[MunkDev]

Not sure if this applies in 100% of cases, but checking if the tooltip's owner is UIParent works for NPCs and all world objects that display the tooltip.

if GameTooltip:GetOwner() == UIParent then
    -- rabble, rabble, rabble
end