GUI.QuitPart of GUI module

Syntax   GUI.Quit

Description   This procedure causes GUI.ProcessEvent to return true. If the program is structured properly with a

            exit when GUI.ProcessEvent
        end loop
at the end of the program, then the program will exit the loop after finishing the current action procedure. This procedure is usually called from the action procedure of a Quit button or Exit menu item.

Example   Here is program that does nothing but wait for the user to press the quit button or type the letter 'Q', 'q', 'X', or 'x'.

        import GUI
        procedure KeyHandler (ch : char)
            if ch = 'Q' or ch = 'q' or ch = 'X' or ch = 'x' then
            end if
        end KeyHandler
        var quitButton : int := GUI.CreateButton (10, 10, 0, "Quit", GUI.Quit)
        GUI.SetKeyEventHandler (KeyHandler)
            exit when GUI.ProcessEvent
        end loop
        put "Done!"
Status   Exported qualified.

This means that you can only call the procedures by calling GUI.Quit, not by calling Quit.

See also   GUI.ProcessEvent. See also GUI.ResetQuit for resetting the "quit" flag, so that a second event loop can be used in the same program.