viewlayer

View layer is a term used in software architecture to denote the presentation layer of an application. It is responsible for rendering data to the user, collecting input, and translating user actions into commands that affect the underlying data or behavior. The view layer sits above the data and business logic layers and may consist of UI components, templates, and styles. It is often implemented with frontend frameworks or libraries that support declarative rendering and component composition.

In common architectural patterns such as Model-View-Controller (MVC), Model-View-ViewModel (MVVM), and Model-View-Presenter (MVP), the view layer handles rendering and interaction logic while delegating data management and business rules to other layers. The view layer typically binds to data supplied by controllers, presenters, or view models, and uses templates or components to render state. It may also manage UI state, validation feedback, and navigation triggers.

Domain-specific usage: Blender, a 3D graphics application, uses the term View Layer to describe a scene partition that controls which objects are visible, which render passes are produced, and how compositing and post-processing are applied. A scene can contain multiple view layers, allowing artists to render different subsets of objects or passes separately, then combine them in the compositor.

Benefits of a defined view layer include separation of concerns, improved testability of UI, and clearer maintenance boundaries. Challenges can include keeping the view layer synchronized with data state and managing complex UI state across components.