![]() Import 'package:shelf_cors_headers/shelf_cors_headers.dart' Ĭonst url = ' app. However, the package I want to fork (scrollablepositionedlist) is a part of a the flutter.widgets repository, which is not a package itself, but a collection of packages. Import 'package:shelf/shelf_io.dart' as io Import 'package:shelf_router/shelf_router.dart' Import 'package:flutter_json_widgets/flutter_json_widgets.dart' ![]() SSR Example Server (dart) // ignore_for_file: depend_on_referenced_packages For example, in VS Code, you can press ctrl+space or hover after typing in a Widget to see what properties it can use. The MaterialApp has a routes property that you can provide a static map to without depending on context. Each widget will have a number of parameters specific to that widget that you can learn about by reading the Flutter Documentation or by using the IntelliSense of your IDE / Text Editor. Since there is no logic things like LayoutBuilder are difficult to achieve. ).Īlso planning on expanding it to include form submission and http requests too. However, there are multiple types of intents that can be used with a class Callback and various actions (navigation, messages, empty. Since this is JSON ultimatly, then logic will not work here. The class will still map to the correct widget at runtime. Since the widget class is a sealed union things like ElevatedButton.icon will be ElevatedButtonIcon instead. While it is possible to match the Flutter SDK api for widget creation in most cases, there are times where this will differ. This package relies on another package called freezed to generate the classes, enums and especially the unions that make it very helpful for parsing. This does not depend on the flutter sdk for the core classes and can be used in places like the server, command line and dart2js. This includes reading and writing to JSON from classes that represent widgets or other helper classes and enums. Moreover, you can write your own Encoder of MethodChannel to boost the speed of data exchange.ĭifficult to write code, the whole UI of Home Widget is drawn by Canvas.This goal of this project is to provide a way to create Flutter widgets with JSON. No need to wait for render, the image is drawn realtime(also means fast). ![]() The handler of MethodChannel will draw a image by a dart Canvas and return the bytes array to native side, then convert back to Bitmap and show.įast, only a few of codes are executed, and bitmap is transferred via memory. In Image Mode, flutter engine is initialized with a separate main Dart function, no Flutter App will be initialized, instead, a MethodChannel will be created. Some Flutter API used is Internal/Undocumented and maybe changed with upgrade of Flutter. It takes lot of memory on iOS because it same as run a full Flutter App (FlutterEngine + FlutterViewController). It can takes >6 seconds in Debug mode on an very old Android phone, but fortunately, it only takes ~1 second in Release mode, so the speed is still acceptable. Slow, Flutter side of runApp is slow, and a 200ms delay should be manually set after setState, because you have to wait for UI render/refresh. Simple, write the same code as normal flutter app. The Widget's UI will be rendered in background by this new Flutter engine, when the render process is done, bitmap screenshots will be taken by Flutter engine and show in the Widget. To render Home Widget, a new instance of Flutter engine will be created, it is used to run a separate Flutter App that create the Widget's UI from a separate main Dart function. This project demonstrated 2 different methods to render a Widget: Flutter render engine on Android has bug on handling transparent image, details: flutter/flutter#73036.Flutter engine on iOS takes too much memory only tested in Simulator.Two Widget render modes are included, see below for details.All Widget examples in this project are full functional, including Widget configure page and background update.This project demonstrates how to create a pure Flutter rendered Home Widget or Today Widget on Android, iOS and macOS.
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