" Encapsulation also means that the class is implemented in such a way that the internal representation of data is not exposed to the user of the object. The impedance mismatch between these two worlds, that of events, and that of objects, is something that's been recognized for a long time . Getting these two worlds to cooperate requires a lot of 'glue code' to make them work together. The 'model-view-controller' paradigm introduces the controller object in between the view (the GUI class) and the model (the object) to communicate between the other two objects. The actual implementation of the controller object can vary quite a bit, but the idea of an object to 'transform' events to changes in data and execution of methods is the essence of this pattern. What does "event driven" mean? Was there ever an application which did not respond to user events. . Air Engine Model Part Plane Vintage? Just because an application responds to events does not mean it is "event driven". Event driven means it spends much of its time waiting for an event and then takes action if and when an event occurs. "

" Herman, Edward S. 'The Propaganda Model: A Retrospective,' Against All Reason, December 9, 2003. Klaehn, Jeffery (ed. ) Filtering the News: Essays on Herman and Chomsky's Propaganda Model. Edinburgh: Black Rose, 2005. . . Model Building Plan Plane. . "