World of Warcraft Scripting Quirks Edit

  • Macros
    • Can only cast spells from a hotkey or mouse click
    • Macros cannot cast spells on a delay
    • /cast only works in Macros
    • only one spell or action can be triggered per button press
  • Frames
    • OnUpdate handlers are only called when the frame is visible.
    • OnUpdate handles are called every frame. Use with care.
    • When nesting frames, you can access the parent frame name in XML names with $parent, this is a textual substitution and cannot be used in Lua. The Lua equivalent to $parent is the GetParent() method of the frame (e.g. getglobal(Frame:GetParent():GetName().."Button") is the same as $parentButton).
    • All Frames have a GetID() function which will obtain the ID specified in the XML. ID's must be positive integers enclosed in quotes: ie. id="1" or id="20"
    • If you don't specify parent="UIParent" in your top-level frames, your frames won't be scaled according to the currently active UI scale. This can lead to some hair-pulling as you try to figure out why your fonts are so huge. (But, in some cases, not having that scaling might be desirable.)
    • If you get no error output, but your addon is simply not being loaded, make sure you don't have a syntax error in your .xml file. A simple way to ensure that your xml is well-formed is to open it in Firefox; it will point out any XML structure errors to you. You can also check the contents of your Logs directory for errors.
  • Output to the outside world
    • The only file output allowed is when the UI engine saves variables before it exits or reloads. Addons use the "## SavedVariables:" header to indicate which data they wish to save.
  • Functions
    • x,y = GetCursorPosition(); will return the current position of the mouse with respect to the object it currently is in. This means x will be 0 if the mouse is at the left edge of a frame or button, regardless of where that frame or button is.
    • x,y = GetCursorPosition(UIParent); will return the current position of the mouse with respect to the entire UI. This can be considered the absolute position..
  • ChatFrame
    • Trying to send colored text to other players will cause your client to disconnect. Not sure if Blizz's server is forcing the disconnect, or my client.
      • Example: /tell Name |cFF00FF00Hello|r. The EditBox will show the text in green after replacing "||" with "|". Pressing enter to send the info to the server chat channel results in the following:
        • "|r" causes the disconnect,
        • "|c" doesn't have the same problem, but will cause the text after it not to show.
  • Variables
    • If you declare a local variable inside an code block (such as an IF block), it is only available inside that code block.
    • See Lua Scope for a complete description of the implications of Lua's variable scoping.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.

Also on FANDOM

Random Wiki