- +

MODEL-VIEW-CONTROLLER PROGRAMMING

MODEL

a software abstraction that represents the "internal state" or "functionality" of the program.

VIEW

presents some part of the model's state to the user (typically on-screen, but could be done with sound, speech etc.)

CONTROLLER

provides a way to modify the state of the model.

• often used with View and Controller combined
• e.g. on-screen "widget" both changes the state and displays the state of the model
• most toolkits do not support this very well.
• assumption: any action on View will lead to a change in Model.
• e.g. click on "mode" button will change the Model's mode.