Re: [gtkmm] mirroring actions in a user interface

["Timothy M. Shead" <tshead k-3d com>]

erik_ohrnberger dme net wrote:

> What is the best way to make sure that each user action applied to the first
> notebook gets propagated to all the other notebooks?

What you're trying to do here is called "Observer Design Pattern", which 
is very common in user interface work.  I strongly recommend picking-up 
a copy of the book "Design Patterns" by Gamma, et al, which covers this 
and other patterns in detail.

The thing that makes gtkmm stand out as a UI toolkit is that the signal 
system encourages you to Do The Right Thing when you come across 
Observer situations.  In your case, you will create a signal or signals 
that will be emitted when user actions mandate notebook modifications. 
Then, every notebook connects to that signal, updating itself when the 
signal is emitted.  You can have as few or as many notebooks as 
required, and they will all be automatically updated when changes are 
made to the first notebook.

Cheers,
Tim Shead