API Frame HookScript

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Widget API ← Frame < HookScript

Sets a function to be called automatically after the original function is called, or "post hook". Works with secure frames. (secure)

frame:HookScript("handler", func)

Parameters Edit

Arguments Edit

string - the name of the handler type, like 'OnShow', 'OnClick'. See Widget handlers.
function - function to be called. Cannot be 'nil'.

Summary Edit

'HookScript' can be used on secure frames, where 'SetScript' would cause "taint" issues and bad UI behavior. Calls each hooked function after calling its original handler function. Any parameters returned by the hooking function will not be discarded, and not be passed to the original handler. Any handler added this way cannot be removed, and will stay until the UI is reloaded.

Examples Edit

local MyPartyFrame_OnClick = function( self, button )
    print(self:GetName() .. " clicked with " .. button)
for i = 1, 4 do
    local frame = _G["PartyMemberFrame"..i]
    frame:HookScript("OnClick", MyPartyFrame_OnClick)

Print notification in chat log when the player clicks a party member's portrait. 'HookScript' works while preserving the security of the unit frame after calling its original handler, where 'SetScript' in this case would not.

Notes Edit

  • Like any event handler, 'func' is called with arguments '(frame, arg1, arg2, ...)', 'event' being 'arg1' for OnEvent handlers.
  • Just like hooksecurefunc("handler", func), this can be used on secure code.
  • If the frame doesn't have a 'func' for 'handler', one will be created as if you called Frame:SetScript().
  • Every script handler has at least one argument (the frame itself, usually self).
  • See widget handlers for details on each handler.

See also Edit

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