WoW API: ExpandTrainerSkillLine

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ExpandTrainerSkillLine -Documentation by starlightblunder-

Expands a header, showing all spells below it.

ExpandTrainerSkillLine(id);

Arguments

id: Index of the trainer service header to expand (if the supplied index is not a header, an error is produced). Note that indices are affected by the trainer filter. (See GetTrainerServiceTypeFilter and SetTrainerServiceTypeFilter.)

Example

Expands all trainer headers.

local i, category;
for i=1,GetNumTrainerServices() do
 _ , _, category = GetTrainerServiceInfo(i);
 if (category == nil) then
  break; -- GetNumTrainerServices() does not check if you're talking to a trainer or not.
 end
 if (category == "header") then
  ExpandTrainerSkillLine(i);
 end
end