/*-------------------------------------------------------------------- * Function: start_stop * Returns: t or nil * Description: Used by control buttons to call the start_process() * and stop_processes() functions. *------------------------------------------------------------------*/ function start_stop(button, prog, process_name, args...) { local child; if (button.switched_on()) start_process (button, prog, process_name, args); else stop_processes(prog, process_name); }
If a toggle button is pressed in, it becomes active (ie. the switched_on method returns true), and we want its associated process to start. The program calls the start_process function to start the process, passing along the necessary arguments.
If the user untoggles (releases) a toggle button, the switched_on method becomes FALSE, and we call the stop_processes function to stop the process associated with the button.
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