Mvc devan
Download as PPT, PDF0 likes433 views
The document discusses the Model-View-Controller (MVC) architectural pattern. MVC separates an application's data model (Model), user interface (View), and control logic (Controller) to allow for more modular and cohesive systems. The model manages the application's data and business logic, the view displays the UI and outputs to the user, and the controller interprets user input and commands changes to the model or view. MVC promotes separation of concerns, loose coupling, and ease of maintenance. It originated in 1979 and was first used in Smalltalk-80 to develop graphical user interfaces like those of the Apple Lisa and Macintosh computers.
Mvc devan
- 2. What is MVC? Architectural design pattern which works to separate data and UI for a more cohesive and modularized system
- 3. What is MVC? Model represents the data model − “Manages behavior and data of the application domain” View represents the screen(s) shown to the user − “Manages the graphical and/or textual output to the portion of the bitmapped display that is allocated to its application” Controller represents interactions from the user that changes the data and the view − “Interprets the mouse and keyboard inputs from the user, commanding the model and/or the view to change as appropriate” (Burbeck)
- 4. How did it come about? Presented by Trygve Reenskaug in 1979 First used in the Smalltalk-80 framework − Used in making Apple interfaces (Lisa and Macintosh)
- 5. How does it work? User inputs a command Controller handles input and updates model or changes the view View, which relies on model to show data to user, updates if necessary Rinse and Repeat
- 6. What is MVC?
- 7. What’s the point? Provides a logical structure for heavily interactive system Adheres to good engineering design principles and practices − Information hiding, less coupling, simplicity, etc. − Delegated control style
- 8. What’s the point? Just plain easier (even if it doesn’t look it)! • Study shows that most introductory CS college students tend to clump a UI program into one big monolithic main class • Unfamiliarity stems from student tendency to program according to styles presented in textbooks and not being introduced to design principles early (Morse)
- 9. Conclusion MVC is a sound architectural design for almost any GUI application
- 10. Conclusion MVC is a sound architectural design for almost any GUI application