How to run an external script

[amagnolo]

I would like to run an external program (script) when a button is clicked in a panel.
Is this possible? How should it be done?
Thank you

[amagnolo]

Self-answer: Yes, it is possible, using LUA. It was not so obvoius to me. 🙂

[goodweather]

Can you put an example of code? Thx. I’ll include that in the Step by Step guide…

[amagnolo]

Hello, here is the LUA code.
I needed a button to switch the CPU frequency between power saving and performance modes. So, the code first checks if the panel is running in Windows or in Linux/OS X, then calls the external script.
You can find the actual scripts in my panel distribution, at http://blog.magnolo.com/pianoteq-touch-panel/

set_governor = function(--[[ CtrlrModulator --]] mod, --[[ number --]] value, --[[ number --]] source)
	if value==0 then
		governor="powersave"
	else
		governor="performance"
	end
	if package.config:sub(1,1) == '\\' then -- windows
		os.execute( "%UserProfile%\\set_governor.bat "..governor)
	else -- OSX and Linux
		os.execute( "~/set_governor.sh "..governor)
	end
end

By the way, your guide was very useful to understand how to begin with Ctrlr, thank you very much!

• This reply was modified 8 years, 3 months ago by amagnolo.

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