RenderingFlutterBinding class

A concrete binding for applications that use the Rendering framework directly. This is the glue that binds the framework to the Flutter engine.

When using the rendering framework directly, this binding, or one that implements the same interfaces, must be used. The following mixins are used to implement this binding:

• GestureBinding, which implements the basics of hit testing.
• SchedulerBinding, which introduces the concepts of frames.
• ServicesBinding, which provides access to the plugin subsystem.
• SemanticsBinding, which supports accessibility.
• PaintingBinding, which enables decoding images.
• RendererBinding, which handles the render tree.

You would only use this binding if you are writing to the rendering layer directly. If you are writing to a higher-level library, such as the Flutter Widgets library, then you would use that layer's binding (see WidgetsFlutterBinding).

The RenderingFlutterBinding can manage multiple render trees. Each render tree is rooted in a RenderView that must be added to the binding via addRenderView to be consider during frame production, hit testing, etc. Furthermore, the render tree must be managed by a PipelineOwner that is part of the pipeline owner tree rooted at rootPipelineOwner.

Adding PipelineOwners and RenderViews to this binding in the way described above is left as a responsibility for a higher level abstraction. The binding does not own any RenderViews directly.