桌面端窗口

使用window_manager

在项目中使用下面的命令来安装：

flutter pub add window_manager

配置window_manager

注意：不同系统需要进行不同的配置，可以点击这里查看

对于macOS

import Cocoa
import FlutterMacOS
import window_manager

class MainFlutterWindow: NSWindow {
  override func awakeFromNib() {
    let flutterViewController = FlutterViewController()
    self.backgroundColor = NSColor.clear  
    flutterViewController.backgroundColor = NSColor.clear 
    let windowFrame = self.frame
    self.contentViewController = flutterViewController
    self.setFrame(windowFrame, display: true)

    RegisterGeneratedPlugins(registry: flutterViewController)

    super.awakeFromNib()
  }

  override public func order(_ place: NSWindow.OrderingMode, relativeTo otherWin: Int) {  
    super.order(place, relativeTo: otherWin)  
    hiddenWindowAtLaunch()  
  } 
}

对于Windows

// windows/runner/win32_window.cpp

// ...
flutter_controller_->engine()->SetNextFrameCallback([&]() {
  this->Show();
  // this->Show();
});

// ...

在main.dart中这样修改主函数：

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await windowManager.ensureInitialized();

  WindowOptions windowOptions = WindowOptions(
    size: Size(800, 600),
    center: true,
    backgroundColor: Colors.transparent,
    skipTaskbar: false,
    titleBarStyle: TitleBarStyle.hidden,
  );
  windowManager.waitUntilReadyToShow(windowOptions, () async {
    await windowManager.show();
    await windowManager.focus();
  });

  runApp(MyApp());
}

标题栏

// 注意添加with WindowListener
class _MainWindowState extends State<MainWindow> with WindowListener {

  @override
  void initState() {
    super.initState();
    windowManager.addListener(this);
  }

 @override
  void dispose() {
    windowManager.removeListener(this);
    super.dispose();
  }

  bool isMax=false;

  @override
  void onWindowMaximize(){
    setState(() {
      isMax=true;
    });
  }
  
  @override
  void onWindowUnmaximize(){
    setState(() {
      isMax=false;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        SizedBox(
          height: 30,
          child: Row(
            children: [
              Expanded(child: DragToMoveArea(child: Container())),
              if(Platform.isWindows) Row(
                children: [
                  WindowCaptionButton.minimize(
                    brightness: Theme.of(context).brightness,
                    onPressed: ()=>windowManager.minimize()
                  ),
                  isMax ? WindowCaptionButton.unmaximize(
                    brightness: Theme.of(context).brightness,
                    onPressed: ()=>windowManager.unmaximize()
                  ) : WindowCaptionButton.maximize(
                    brightness: Theme.of(context).brightness,
                    onPressed: ()=>windowManager.maximize()
                  ),  
                  WindowCaptionButton.close(
                    brightness: Theme.of(context).brightness,
                    onPressed: ()=>windowManager.close()
                  ),
                ],
              ),
            ],
          ),
        ),
      ],
    );
  }
}