Translation of "Model View ViewModel"

wikipedia, “Model View ViewModel”, public translation into French from English More about this translation.

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Model View ViewModel

The Model View ViewModel (MVVM) is an architectural pattern used in software engineering that originated from Microsoft as a specialization of the Presentation Model design pattern introduced by Martin Fowler.[1] Largely based on the Model-view-controller pattern (MVC), MVVM is targeted at modern UI development platforms (Windows Presentation Foundation and Silverlight) in which there is a User Experience (UX) developer who has different requirements than a more “traditional” developer (i.e. oriented toward business logic and back end development). The View-Model of MVVM is “basically a value converter on steroids”[2] meaning that the View-Model is responsible for exposing the data objects from the Model in such a way that those objects are easily managed and consumed. In this respect, the View-Model is more Model than View, and handles most if not all of the View’s display logic (though the demarcation between what functions are handled by which layer is a subject of ongoing discussion[3] and exploration).

MVVM was designed to make use of specific functions in WPF to better facilitate the separation of View layer development from the rest of the pattern by removing virtually all “code behind” from the View layer.[4] Instead of requiring Interactive Designers to write View code, they can use the native WPF markup language XAML and create bindings to the ViewModel, which is written and maintained by application developers. This separation of roles allows Interactive Designers to focus on UX needs rather than programming or business logic, allowing for the layers of an application to be developed in multiple work streams.

History

Microsoft MVP Josh Smith reported[4] that

"In 2005, John Gossman, currently one of the WPF and Silverlight Architects at Microsoft, unveiled the Model-View-ViewModel (MVVM) pattern on his blog. MVVM is identical to Fowler's Presentation Model, in that both patterns feature an abstraction of a View, which contains a View's state and behavior. Fowler introduced Presentation Model as a means of creating a UI platform-independent abstraction of a View, whereas Gossman introduced MVVM as a standardized way to leverage core features of WPF to simplify the creation of user interfaces. In that sense, I consider MVVM to be a specialization of the more general PM pattern, tailor-made for the WPF and Silverlight platforms."

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