IDLE_ACTION
Predefined IUP action, generated when there are no events.
Callback
int function(void); [in C]
Return: IUP_CLOSE will be processed.
Notes
In Windows this callback changes the message loop to a more CPU consuming one. Set to NULL when not using.
In Motif it register a background processing procedure.
In GTK it sets an idle function.
It can only be set using IupSetFunction.
Often used to perform background operations. For example, a time-consuming drawing operation may allow the user to take a decision before the operation is over. But it is safer to use a timer for this purpose.
Lua Binding
To modify this action use the function iup.SetIdle(myfunction) in Lua. Using nil as a parameter to remove the association.