feat: support windows stock icons

example/widgets_api/lib/main.dart

@@ -1,14 +1,13 @@
 import 'package:betrayal/betrayal.dart';
 import 'package:flutter/foundation.dart';
+import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 
 void main() {
   // Configure plugin log levels
   BetrayalLogConfig.allowIndividualLevels();
   BetrayalLogConfig.level = kDebugMode ? "FINER" : "INFO";
 
-
-
   // This is only necessary if icons seem to persist after hot restarting.
   // That happens when after restarting the app is not immediately interacting
   // with [TrayIcon]s again.
@@ -18,8 +17,6 @@ void main() {
   // Now the app will immediately need a new [TrayIcon]
   // and the old one can be removed.
 
-
-
   runApp(const MyApp());
 }
 
@@ -93,25 +90,34 @@ class _MyHomePageState extends State<MyHomePage> {
                           duration: const Duration(milliseconds: 200),
                           child: Padding(
                             padding: const EdgeInsets.only(bottom: 32),
-                            child: Builder(
-                              // Get a fresh [BuildContext] that can access the [TrayIcon]
-                              builder: (BuildContext context) => Row(
-                                mainAxisAlignment:
-                                    MainAxisAlignment.spaceEvenly,
-                                children: [
-                                  for (var value in WinIcon.values)
-                                    IconButton(
-                                        tooltip: "Set the ${value.name} icon",
+                            child: SizedBox(
+                              height: 75,
+                              child: ScrollConfiguration(
+                                behavior: ScrollConfiguration.of(context)
+                                    .copyWith(dragDevices: {
+                                  PointerDeviceKind.touch,
+                                  PointerDeviceKind.mouse
+                                }, scrollbars: true),
+                                child: ListView.builder(
+                                  itemExtent: 75,
+                                  scrollDirection: Axis.horizontal,
+                                  itemCount: StockIcon.values.length,
+                                  itemBuilder:
+                                      (BuildContext context, int index) {
+                                    final icon = StockIcon.values[index];
+                                    return IconButton(
+                                        tooltip: "Set the ${icon.name} icon",
                                         onPressed: shown
                                             ? () => TrayIcon.of(context)
-                                                .setImage(winIcon: value)
+                                                .setImage(stockIcon: icon)
                                             : null,
-                                        icon: Text(value.emoji)),
-                                ],
+                                        icon: Text(icon.emoji));
+                                  },
+                                ),
                               ),
                             ),
                           ),
-                        )
+                        ),
                       ],
                     ),
                   )),

lib/betrayal.dart

@@ -1,4 +1,5 @@
 export 'src/win_icon.dart';
+export 'src/stock_icon.dart';
 export 'src/win_event.dart';
 export 'src/image.dart';
 export 'src/plugin.dart';

lib/src/image.dart

@@ -5,6 +5,7 @@ import 'dart:typed_data';
 
 import 'package:betrayal/src/plugin.dart';
 import 'package:betrayal/src/win_icon.dart';
+import 'package:betrayal/src/stock_icon.dart';
 import 'package:flutter/foundation.dart';
 import 'package:logging/logging.dart';
 import 'package:path/path.dart' as p;
@@ -52,6 +53,11 @@ Continuing under the assumption that only the file extension is wrong""");
     setIcon = (id, plugin) => plugin.setImageAsWinIcon(id, winIcon.code);
   }
 
+  /// A [TrayIconImageDelegate] that uses a Windows system icon.
+  TrayIconImageDelegate.fromStockIcon(StockIcon stockIcon) {
+    setIcon = (id, plugin) => plugin.setImageAsStockIcon(id, stockIcon.code);
+  }
+
   /// A [TrayIconImageDelegate] that uses an RGBA image buffer.
   ///
   /// The buffer is expected to be in the format of a 32x32 RGBA image.

lib/src/imperative.dart

@@ -184,6 +184,7 @@ class TrayIcon {
     Uri? path,
     ByteBuffer? pixels,
     String? asset,
+    StockIcon? stockIcon,
     WinIcon? winIcon,
   }) async {
     _ensureIsActive();
@@ -196,6 +197,8 @@ class TrayIcon {
       delegate = TrayIconImageDelegate.fromAsset(asset);
     } else if (path != null) {
       delegate = TrayIconImageDelegate.fromPath(uri: path);
+    } else if (stockIcon != null) {
+      delegate = TrayIconImageDelegate.fromStockIcon(stockIcon);
     } else if (winIcon != null) {
       delegate = TrayIconImageDelegate.fromWinIcon(winIcon);
     } else {

lib/src/plugin.dart

@@ -12,6 +12,7 @@ import 'package:flutter/widgets.dart';
 import 'package:logging/logging.dart';
 
 import 'image.dart';
+import 'stock_icon.dart';
 import 'win_icon.dart';
 import 'win_event.dart';
 
@@ -175,6 +176,15 @@ class BetrayalPlugin {
         'setImageAsWinIcon', {'id': id, 'resourceId': resourceId});
   }
 
+  /// Sets the icon's image, by loading a stock icon.
+  ///
+  /// Check out the [StockIcon] enum for a list of available icons.
+  @protected
+  Future<void> setImageAsStockIcon(Id id, int stockIconId) async {
+    await _channel.invokeMethod(
+        'setImageAsStockIcon', {'id': id, 'stockIconId': stockIconId});
+  }
+
   /// Sets the icon's image, by loading a byte buffer.
   ///
   /// The buffer has to be in the format of a 32-bit RGBA image.