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Call Function Using External Button

 
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Game Hacking Dojo
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Joined: 17 Sep 2023
Posts: 109
PostPosted: Wed May 01, 2024 9:40 am    Post subject: Call Function Using External Button Reply with quote
How do I call functions I defined in an autorun Lua file that I want to call using another autorun Lua file that adds buttons to the UI and calls the functions already defined in the other script?

Yes, the functions are not "local"

When I call the functions using the Lua engine they work but when I use the buttons they do not work.

Code:
local SymbolsBtn = createMenuItem(MainForm)
SymbolsBtn.Name = 'SymbolsBtnExportSymbols'
SymbolsBtn.Caption = 'Export Symbols'
SymbolsBtn.OnClick = exportMainSymbols
miExtensions.add(SymbolsBtn)

local StringsBtn = createMenuItem(MainForm)
StringsBtn.Name = 'StringsBtnExportReferencedStrings'
StringsBtn.Caption = 'Export Referenced Strings'
StringsBtn.OnClick = pcall(createRefrencedFile,'s')
miExtensions.add(StringsBtn)

local FunctionsBtn = createMenuItem(MainForm)
FunctionsBtn.Name = 'FunctionsBtnExportReferencedFunctions'
FunctionsBtn.Caption = 'Export Referenced Functions'
FunctionsBtn.OnClick = pcall(createRefrencedFile,'f')
miExtensions.add(FunctionsBtn)


If I add this snippet to the file where it was originally defined it works.

Thank you
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ParkourPenguin
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PostPosted: Wed May 01, 2024 10:55 am    Post subject: Reply with quote
`exportMainSymbols` isn't defined when this script is run.
(technically, it might be, but that depends on the load order of the scripts)

A wrapper function should work:
Code:
SymbolsBtn.OnClick = function(...)
  exportMainSymbols(...)
end
This forces Lua to look up the name when the wrapper function is run instead of when the script is run.
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Game Hacking Dojo
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Posts: 109
PostPosted: Wed May 01, 2024 12:34 pm    Post subject: Reply with quote
Yup, that worked. Thank you.
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