[macos] Implement setBrightness method #86

Author: lijy91

example/lib/pages/home.dart

@@ -91,10 +91,16 @@ class _HomePageState extends State<HomePage> with TrayListener, WindowListener {
               title: Text('ThemeMode'),
               detailText: Text('${sharedConfig.themeMode}'),
               onTap: () async {
-                sharedConfigManager.setThemeMode(
-                  sharedConfig.themeMode == ThemeMode.light
-                      ? ThemeMode.dark
-                      : ThemeMode.light,
+                ThemeMode newThemeMode =
+                    sharedConfig.themeMode == ThemeMode.light
+                        ? ThemeMode.dark
+                        : ThemeMode.light;
+
+                await sharedConfigManager.setThemeMode(newThemeMode);
+                await windowManager.setBrightness(
+                  newThemeMode == ThemeMode.light
+                      ? Brightness.light
+                      : Brightness.dark,
                 );
               },
             ),

lib/src/window_manager.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:ui';
 
 import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
 
@@ -549,6 +550,17 @@ class WindowManager {
     await _channel.invokeMethod('setOpacity', arguments);
   }
 
+  /// Sets the brightness of the window.
+  ///
+  /// @platforms macos,windows
+  Future<void> setBrightness(Brightness brightness) async {
+    final Map<String, dynamic> arguments = {
+      'brightness': brightness.name,
+    };
+    print(arguments);
+    await _channel.invokeMethod('setBrightness', arguments);
+  }
+
   /// Starts a window drag based on the specified mouse-down event.
   Future<void> startDragging() async {
     await _channel.invokeMethod('startDragging');

macos/Classes/WindowManager.swift

@@ -72,7 +72,7 @@ public class WindowManager: NSObject, NSWindowDelegate {
             titleBarView.isHidden = true
         }
     }
-
+    
     public func destroy() {
         NSApp.terminate(nil)
     }
@@ -165,7 +165,7 @@ public class WindowManager: NSObject, NSWindowDelegate {
             }
         }
     }
-
+    
     public func setAspectRatio(_ args: [String: Any]) {
         let hasFrame = !mainWindow.styleMask.contains(.fullSizeContentView);
         let aspectRatio = (args["aspectRatio"] as! NSNumber).doubleValue
@@ -434,6 +434,16 @@ public class WindowManager: NSObject, NSWindowDelegate {
         mainWindow.alphaValue = opacity
     }
 
+    public func setBrightness(_ args: [String: Any]) {
+        let brightness: String = args["brightness"] as! String
+        if (brightness == "dark") {
+            mainWindow.appearance = NSAppearance(named: NSAppearance.Name.vibrantDark)
+        } else {
+            mainWindow.appearance = NSAppearance(named: NSAppearance.Name.vibrantLight)
+        }
+        mainWindow.invalidateShadow()
+    }
+    
     public func startDragging() {
         DispatchQueue.main.async {
             let window: NSWindow  = self.mainWindow

macos/Classes/WindowManagerPlugin.swift

@@ -223,6 +223,10 @@ public class WindowManagerPlugin: NSObject, FlutterPlugin {
             windowManager.setOpacity(args)
             result(true)
             break
+        case "setBrightness":
+            windowManager.setBrightness(args)
+            result(true)
+            break
         case "startDragging":
             windowManager.startDragging()
             result(true)