[Malsomnus]

Thanks for all the help and explanations

After a lot of experimentation around semlar's code, I technically have a button that switches one talent for me every time I press it. I haven't gotten around to trying to make it work for several talents yet, but here's the code I have so far, in case somebody finds it useful:

function pickTalent(row,col)
  local s = [[
    /stopmacro [combat]
    /click PlayerTalentFrameTalentsTalentRow%sTalent%s
    /click StaticPopup1Button1
  ]]
  return s:format(row,col)
end
 
f.btn = CreateFrame ("Button", nil, f, 'SecureActionButtonTemplate, SecureHandlerBaseTemplate')
f.btn:RegisterForClicks ("AnyDown")
f.btn:SetAttribute ("type","macro")
f.btn:SetAttribute ('macrotext', pickTalent(1,2))
 
f.btn:SetScript ('PostClick', function()
  C_Timer.After(1, function () 
    PlayerTalentFrameTalentsLearnButton:GetScript("OnClick")(PlayerTalentFrameTalentsLearnButton) 
  end)  
end)