tkinter mainloop

[Terry Reedy]

On 11/19/2014 3:46 AM, ast wrote:
> Hello
>
> mainloop() is a window method which starts the event manager which
> tracks for events (mouse, keyboard ...) to be send to the window.
>
> But if I forget the root.mainloop() in my program, it works well anyway,
> I cant see any failure. Why ?
>
> Second question, is it possible to cancel a mainloop() ?

The one loop should been handling all events for all windows.

> I neeed this feature because I have a main window "root = Tk()"
> which opens a Toplevel secondary window "top = Toplevel()"
> and I would like root window to be frozen while the user fills
> the top window.

There are methods for freezing a widget.  Something like root.withdraw. 
  But there is more than one for doing slightly different things.

-- 
Terry Jan Reedy