Add SetIconPosition (MacOS)

lib/src/tray_manager.dart

@@ -17,6 +17,8 @@ const kEventOnTrayIconRightMouseDown = 'onTrayIconRightMouseDown';
 const kEventOnTrayIconRightMouseUp = 'onTrayIconRightMouseUp';
 const kEventOnTrayMenuItemClick = 'onTrayMenuItemClick';
 
+enum TrayIconPositon { left, right }
+
 class TrayManager {
   TrayManager._() {
     _channel.setMethodCallHandler(_methodCallHandler);
@@ -91,6 +93,7 @@ class TrayManager {
   Future<void> setIcon(
     String iconPath, {
     bool isTemplate = false, // macOS only
+    TrayIconPositon iconPosition = TrayIconPositon.left, // macOS only
   }) async {
     ByteData imageData = await rootBundle.load(iconPath);
     String base64Icon = base64Encode(imageData.buffer.asUint8List());
@@ -104,10 +107,21 @@ class TrayManager {
       ]),
       'base64Icon': base64Icon,
       'isTemplate': isTemplate,
+      'iconPosition': iconPosition.name,
     };
     await _channel.invokeMethod('setIcon', arguments);
   }
 
+  /// Sets the icon position of the tray icon.
+  ///
+  /// @platforms macos
+  Future<void> setIconPosition(TrayIconPositon trayIconPositon) async {
+    final arguments = <String, dynamic>{
+      'iconPosition': trayIconPositon.name,
+    };
+    await _channel.invokeMethod('setIconPosition', arguments);
+  }
+
   /// Sets the hover text for this tray icon.
   Future<void> setToolTip(String toolTip) async {
     final Map<String, dynamic> arguments = {

macos/Classes/TrayIcon.swift

@@ -27,10 +27,19 @@ public class TrayIcon: NSView {
         fatalError("init(coder:) has not been implemented")
     }
 
-    public func setImage(_ image: NSImage) {
+    public func setImage(_ image: NSImage, _ imagePosition: String) {
         if let button = statusItem?.button {
             button.image = image
-            button.imagePosition = NSControl.ImagePosition.imageLeft
+            setImagePosition(imagePosition)
+        }
+
+
+        self.frame = statusItem!.button!.frame
+    }
+
+    public func setImagePosition(_ imagePosition: String) {
+        if let button = statusItem?.button {
+            button.imagePosition = imagePosition == "right" ? NSControl.ImagePosition.imageRight : NSControl.ImagePosition.imageLeft
         }
         self.frame = statusItem!.button!.frame
     }

macos/Classes/TrayManagerPlugin.swift

@@ -48,6 +48,9 @@ public class TrayManagerPlugin: NSObject, FlutterPlugin, NSMenuDelegate {
         case "setIcon":
             setIcon(call, result: result)
             break
+        case "setIconPosition":
+            setIconPosition(call, result: result)
+            break
         case "setToolTip":
             setToolTip(call, result: result)
             break
@@ -131,6 +134,7 @@ public class TrayManagerPlugin: NSObject, FlutterPlugin, NSMenuDelegate {
         let args:[String: Any] = call.arguments as! [String: Any]
         let base64Icon: String =  args["base64Icon"] as! String;
         let isTemplate: Bool =  args["isTemplate"] as! Bool;
+        let iconPosition: String =  args["iconPosition"] as! String;
 
         let imageData = Data(base64Encoded: base64Icon, options: .ignoreUnknownCharacters)
         let image = NSImage(data: imageData!)
@@ -153,11 +157,20 @@ public class TrayManagerPlugin: NSObject, FlutterPlugin, NSMenuDelegate {
             }
         }
 
-        trayIcon?.setImage(image!)
+        trayIcon?.setImage(image!, iconPosition)
 
         result(true)
     }
 
+    public func setIconPosition(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        let args:[String: Any] = call.arguments as! [String: Any]
+        let iconPosition: String =  args["iconPosition"] as! String;
+
+        trayIcon?.setImagePosition(iconPosition)
+
+        result(true)
+    }
+
     public func setToolTip(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
         let args:[String: Any] = call.arguments as! [String: Any]
         let toolTip: String =  args["toolTip"] as! String;