fix MouseBackDetector

lib/components/gesture.dart

@@ -1,58 +1,19 @@
 part of 'components.dart';
 
-class MouseBackRecognizer extends BaseTapGestureRecognizer {
-  GestureTapDownCallback? onTapDown;
-
-  MouseBackRecognizer({
-    super.debugOwner,
-    super.supportedDevices,
-    super.allowedButtonsFilter,
-  });
-
-  @override
-  void handleTapCancel({
-    required PointerDownEvent down,
-    PointerCancelEvent? cancel,
-    required String reason,
-  }) {}
-
-  @override
-  void handleTapDown({required PointerDownEvent down}) {
-    final TapDownDetails details = TapDownDetails(
-      globalPosition: down.position,
-      localPosition: down.localPosition,
-      kind: getKindForPointer(down.pointer),
-    );
-
-    if (down.buttons == kBackMouseButton && onTapDown != null) {
-      invokeCallback<void>('onTapDown', () => onTapDown!(details));
-    }
-  }
-
-  @override
-  void handleTapUp({
-    required PointerDownEvent down,
-    required PointerUpEvent up,
-  }) {}
-}
-
 class MouseBackDetector extends StatelessWidget {
   const MouseBackDetector({super.key, required this.onTapDown, required this.child});
 
   final Widget child;
 
-  final GestureTapDownCallback onTapDown;
+  final void Function() onTapDown;
 
   @override
   Widget build(BuildContext context) {
-    return RawGestureDetector(
-      gestures: <Type, GestureRecognizerFactory>{
-        MouseBackRecognizer: GestureRecognizerFactoryWithHandlers<MouseBackRecognizer>(
-          () => MouseBackRecognizer(),
-          (MouseBackRecognizer instance) {
-            instance.onTapDown = onTapDown;
-          },
-        ),
+    return Listener(
+      onPointerDown: (event) {
+        if (event.buttons == kBackMouseButton) {
+          onTapDown();
+        }
       },
       behavior: HitTestBehavior.translucent,
       child: child,

lib/main.dart

@@ -150,9 +150,7 @@ class _MyAppState extends State<MyApp> {
                 ),
               },
               child: MouseBackDetector(
-                onTapDown: (event) {
-                  App.pop();
-                },
+                onTapDown: App.pop,
                 child: WindowFrame(widget),
               ),
             );