Minimal Rust / Flutter project utilizing NativeShell, libadwaita, and adwaita

main.dart

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:libadwaita/libadwaita.dart';
import 'package:nativeshell/nativeshell.dart';
import 'package:adwaita/adwaita.dart';
import 'package:window_decorations/window_decorations.dart';

void main() async {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: AdwaitaThemeData.dark(),
      home: DefaultTextStyle(
        style: TextStyle(
          color: Colors.white,
          fontSize: 14,
        ),
        child: Container(
          color: Colors.black,
          child: WindowWidget(
            onCreateState: (initData) {
              WindowState? state;
              state ??= MainWindowState();
              return state;
            },
          ),
        ),
      ),
    );
  }
}

class MainWindowState extends WindowState {
  @override
  Future<void> initializeWindow(Size intrinsicContentSize) async {
    await window.setStyle(WindowStyle(canResize: true, frame: WindowFrame.noTitle));
    await window.show();
  }

  @override
  WindowSizingMode get windowSizingMode =>
      WindowSizingMode.atLeastIntrinsicSize;

  final ThemeType _currentThemeType = ThemeType.auto;

  @override
  Widget build(BuildContext context) {
    return WindowLayoutProbe(
        child: Column(mainAxisSize: MainAxisSize.max, children: [
      AdwHeaderBar.minimalNativeshell(height: 30, window: window, start: [
        Builder(builder: (context) {
          return AdwHeaderButton(
              icon: const Icon(Icons.view_sidebar, size: 15),
              // isActive: _flapController.isOpen,
              onPressed: () {
                // _flapController.toggle();
              });
        })
      ], end: [
        DecoratedMinimizeButton(
          width: 25,
          type: _currentThemeType,
          onPressed: () => debugPrint('Minimize Window'),
        ),
        DecoratedMaximizeButton(
          width: 25,
          type: _currentThemeType,
          onPressed: () => debugPrint('Maximize Window'),
        ),
        DecoratedCloseButton(
          width: 25,
          type: _currentThemeType,
          onPressed: () => debugPrint('Close Window'),
        )
      ]),
      Container(
        padding: EdgeInsets.all(20),
        child: Center(child: Text('Welcome to NativeShell!')),
      )
    ]));
  }
}

pubspec.yaml

version: 1.0.0+1

environment:
  sdk: ">=2.12.0-214.0.dev <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  pedantic: ^1.9.2
  path: ^1.7.0

  # Not sure if you *need* all of these, some were left over from the 
  # original NativeShell example, which was more complex than this
  
  cupertino_icons: ^1.0.4
  nativeshell: ^0.1.13
  adwaita:
  libadwaita:
  window_decorations: ^2.0.0

  path_provider: ^2.0.8
  package_info_plus: ^1.3.0
  shared_preferences: ^2.0.13
   
  # I had to comment this out as I can't compile with this for some reason. 
  # Same reason I could not use the fix46 branch. Some sort of dependency confliction
  # url_launcher: ^6.0.6
  
dev_dependencies:
  flutter_test:
    sdk: flutter
    
flutter:
  uses-material-design: true

The above produces this minimal example, which could be built upon: