The document discusses Model-View-ViewModel (MVVM), a software architectural pattern. It separates an application into three main logical components: the model, the view, and the view model. The model represents the data and business logic. The view displays the UI and handles user input. The view model acts as an intermediary between the model and view, preparing the model data for display and passing user input to the model. The document provides examples of each component and notes how data binding and events allow the view and view model to communicate without directly referencing each other. It argues that MVVM promotes loose coupling, testability and maintainability.

1. ModelViewViewModel

2. Felipe Pimentel Felipe Pimentel

3. Felipe Pimentel FelipePimentell felipejfp@hotmail.com fpimentel88 felipe.pimentel@2pc.com.br http://felipepimentel.net

4. Felipe Pimentel

5. Agenda O que é? O que faz? Quando usar? Variações? Light Toolkit Demo!!!

6. “Mais outro M* alguma coisa?” MVP MVC MV?????

7. O que é MVVM? Padrão de arquitetura de apresentação Separando responsabilidades Isolar designers e desenvolvedores? Facilita os testes

8. Por que do MVVM? Fatores tecnologicos Databinds INotifyPropertyChanged IValueConverter Modelo de eventos utilizando ICommand

9. MVVM Model View DataBinding Presentation Model (ViewModel)

10. ModelMVVM Represents the data The entity Not required to know where it gets its data from From a WCF service. WCF RIA Services, etc May contain validation

11. ViewMVVM The screen, the UI, the UserControl in Silverlight Handles UI look and feel Presentation of information Communicates with ViewModel through bindings

12. ViewModelMVVM Conhecido por PresenterModel Main source of logic for the MVVM triad Connects the Model to the View Abstracts the View Public properties that are bound to a View INotifyPropertyChanged and INotifyCollectionChanged talk to the View through bindings Listens for changes from the View through bindings Invokes services to communicate outside the MVVM triad

13. MVVM DEMO!!!! DEMO!!! DEMO!! DEMO!

14. Referências John Papa - http://johnpapa.net/ http://www.galasoft.ch/mvvm/getstarted/ http://msdn.microsoft.com/en-us/magazine/dd419663.aspx http://virtualdreams.com.br