source: http://st-www.cs.uiuc.edu/users/smarch/st-docs/mvc.html
Basic Concepts:
In the MVC paradigm the user input, the modeling of the external world,
and the visual feedback to the user are explicitly separated and handled by
three types of object, each specialized for its task. The view manages
the graphical and/or textual output to the portion of the bitmapped display
that is allocated to its application. The controller interprets the
mouse and keyboard inputs from the user, commanding the model and/or the view
to change as appropriate. Finally, the model manages the behavior and
data of the application domain, responds to requests for information about its
state (usually from the view), and responds to instructions to change state
(usually from the controller).
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