opt: use whole focus instead to trigger session enter or leave

flutter/lib/common/widgets/remote_input.dart

@@ -9,11 +9,12 @@ class RawKeyFocusScope extends StatelessWidget {
   final InputModel inputModel;
   final Widget child;
 
-  RawKeyFocusScope(
+  RawKeyFocusScope({
-      {this.focusNode,
+    this.focusNode,
     this.onFocusChange,
     required this.inputModel,
-      required this.child});
+    required this.child,
+  });
 
   @override
   Widget build(BuildContext context) {
@@ -35,11 +36,15 @@ class RawPointerMouseRegion extends StatelessWidget {
   final MouseCursor? cursor;
   final PointerEnterEventListener? onEnter;
   final PointerExitEventListener? onExit;
+  final PointerDownEventListener? onPointerDown;
+  final PointerUpEventListener? onPointerUp;
 
   RawPointerMouseRegion(
       {this.onEnter,
       this.onExit,
       this.cursor,
+      this.onPointerDown,
+      this.onPointerUp,
       required this.inputModel,
       required this.child});
 
@@ -47,8 +52,14 @@ class RawPointerMouseRegion extends StatelessWidget {
   Widget build(BuildContext context) {
     return Listener(
         onPointerHover: inputModel.onPointHoverImage,
-        onPointerDown: inputModel.onPointDownImage,
+        onPointerDown: (evt) {
-        onPointerUp: inputModel.onPointUpImage,
+          onPointerDown?.call(evt);
+          inputModel.onPointDownImage(evt);
+        },
+        onPointerUp: (evt) {
+          onPointerUp?.call(evt);
+          inputModel.onPointUpImage(evt);
+        },
         onPointerMove: inputModel.onPointMoveImage,
         onPointerSignal: inputModel.onPointerSignalImage,
         /*

flutter/lib/desktop/pages/remote_page.dart

@@ -52,6 +52,7 @@ class _RemotePageState extends State<RemotePage>
     with AutomaticKeepAliveClientMixin, MultiWindowListener {
   Timer? _timer;
   String keyboardMode = "legacy";
+  bool _isWindowBlur = false;
   final _cursorOverImage = false.obs;
   late RxBool _showRemoteCursor;
   late RxBool _zoomCursor;
@@ -59,7 +60,6 @@ class _RemotePageState extends State<RemotePage>
   late RxBool _keyboardEnabled;
 
   final FocusNode _rawKeyFocusNode = FocusNode(debugLabel: "rawkeyFocusNode");
-  var _imageFocused = false;
 
   Function(bool)? _onEnterOrLeaveImage4Menubar;
 
@@ -104,7 +104,6 @@ class _RemotePageState extends State<RemotePage>
     if (!Platform.isLinux) {
       Wakelock.enable();
     }
-    _rawKeyFocusNode.requestFocus();
     _ffi.ffiModel.updateEventListener(widget.id);
     _ffi.qualityMonitorModel.checkShowQualityMonitor(widget.id);
     // Session option should be set after models.dart/FFI.start
@@ -129,11 +128,18 @@ class _RemotePageState extends State<RemotePage>
   @override
   void onWindowBlur() {
     super.onWindowBlur();
+    _isWindowBlur = true;
     // unfocus the key focus when the whole window is lost focus,
     // and let OS to handle events instead.
     _rawKeyFocusNode.unfocus();
   }
 
+  @override
+  void onWindowFocus() {
+    super.onWindowFocus();
+    _isWindowBlur = false;
+  }
+
   @override
   void dispose() {
     debugPrint("REMOTE PAGE dispose ${widget.id}");
@@ -166,9 +172,16 @@ class _RemotePageState extends State<RemotePage>
                   color: Colors.black,
                   child: RawKeyFocusScope(
                       focusNode: _rawKeyFocusNode,
-                      onFocusChange: (bool v) {
+                      onFocusChange: (bool imageFocused) {
-                        _imageFocused = v;
+                        debugPrint(
-                        if (_imageFocused) {
+                            "onFocusChange(window active:${!_isWindowBlur}) $imageFocused");
+                        if (_isWindowBlur) {
+                          imageFocused = false;
+                          Future.delayed(Duration.zero, () {
+                            _rawKeyFocusNode.unfocus();
+                          });
+                        }
+                        if (imageFocused) {
                           _ffi.inputModel.enterOrLeave(true);
                         } else {
                           _ffi.inputModel.enterOrLeave(false);
@@ -199,9 +212,6 @@ class _RemotePageState extends State<RemotePage>
   }
 
   void enterView(PointerEnterEvent evt) {
-    if (!_imageFocused) {
-      _rawKeyFocusNode.requestFocus();
-    }
     _cursorOverImage.value = true;
     _firstEnterImage.value = true;
     if (_onEnterOrLeaveImage4Menubar != null) {
@@ -244,6 +254,11 @@ class _RemotePageState extends State<RemotePage>
           listenerBuilder: (child) => RawPointerMouseRegion(
             onEnter: enterView,
             onExit: leaveView,
+            onPointerDown: (event) {
+              if (!_rawKeyFocusNode.hasFocus) {
+                _rawKeyFocusNode.requestFocus();
+              }
+            },
             inputModel: _ffi.inputModel,
             child: child,
           ),