MVP - The Multi View Playground

This repository contains samples to experiment with rendering into multiple views from Flutter. Some samples are aspirational and may not actually work. Some samples may require a custom engine build to run. Some samples may be outdated and/or have other issues. DO NOT DEPEND ON ANYTHING IN THIS REPOSITORY.

How to use?

This sample is meant to be used with a custom (prototype) engine and framework. Currently, it only supports macOS.

Set up the Framework development environment: See the wiki page.
In the framework repo, add the prototype remote and switch to the prototype branch:

git remote add goderbauer https://github.com/goderbauer/flutter/
git checkout goderbauer/rawview

Set up the Engine development environment: See the wiki page.
In the engine repo, add the prototype remote and switch to the prototype branch:

git remote add loic-sharma https://github.com/loic-sharma/flutter-engine/
git checkout loic-sharma/multiview-prototype

In this repo, edit pubspec.yaml, and add the following dependency override to use the custom dart:ui library:

dependency_overrides:
  sky_engine:
    path: /path/to/flutter/engine/out/host_debug_unopt/gen/dart-pkg/sky_engine

Build the custom engine: See the wiki page.
In this repo, update packages.

flutter pub get

Run a sample file (see below for options) with the custom engine. For example,

flutter run --local-engine=host_debug_unopt -d macos -t lib/raw_dynamic.dart

If everything goes well, the app should start up with a window, then another window after 1 second.

Samples

raw_static.dart

Renders some view-specific information into each FlutterView available in PlatformDispatcher.views using only APIs exposed by dart:ui. A new frame is only scheduled if the metrics of a FlutterView change or if a view is added/removed.

raw_dynamic.dart

Renders a spinning rectangular into each FlutterView available in PlatformDispatcher.views using only APIs exposed by dart:ui. Frames are continuously scheduled to keep the animation running.

widgets_static.dart

Renders some view-specific information into each FlutterView available in PlatformDispatcher.views using the Flutter widget framework (package:flutter/widgets.dart). A new frame is only scheduled if the metrics of a FlutterView change or if a view is added/removed.

widgets_dynamic.dart

Renders a spinning rectangular into each FlutterView available in PlatformDispatcher.views using the Flutter widget framework (package:flutter/widgets.dart). Frames are continuously scheduled to keep the animation running.

widgets_counter.dart

Renders the Counter app (an interactive Material Design app) into each FlutterView available in PlatformDispatcher.views.

loic-sharma / mvp