diff --git a/flutter/lib/common.dart b/flutter/lib/common.dart
index 8a2792a2b..752de582c 100644
--- a/flutter/lib/common.dart
+++ b/flutter/lib/common.dart
@@ -2,7 +2,6 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
-import 'dart:ui';
 
 import 'package:back_button_interceptor/back_button_interceptor.dart';
 import 'package:desktop_multi_window/desktop_multi_window.dart';
diff --git a/flutter/lib/desktop/pages/desktop_setting_page.dart b/flutter/lib/desktop/pages/desktop_setting_page.dart
index 709d4deda..b063c3c15 100644
--- a/flutter/lib/desktop/pages/desktop_setting_page.dart
+++ b/flutter/lib/desktop/pages/desktop_setting_page.dart
@@ -5,7 +5,6 @@ import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_hbb/common.dart';
-import 'package:flutter_hbb/consts.dart';
 import 'package:flutter_hbb/desktop/pages/desktop_home_page.dart';
 import 'package:flutter_hbb/desktop/pages/desktop_tab_page.dart';
 import 'package:flutter_hbb/models/platform_model.dart';
diff --git a/flutter/lib/desktop/pages/desktop_tab_page.dart b/flutter/lib/desktop/pages/desktop_tab_page.dart
index 8672a1dad..794dd1c08 100644
--- a/flutter/lib/desktop/pages/desktop_tab_page.dart
+++ b/flutter/lib/desktop/pages/desktop_tab_page.dart
@@ -6,6 +6,7 @@ import 'package:flutter_hbb/consts.dart';
 import 'package:flutter_hbb/desktop/pages/desktop_home_page.dart';
 import 'package:flutter_hbb/desktop/pages/desktop_setting_page.dart';
 import 'package:flutter_hbb/desktop/widgets/tabbar_widget.dart';
+import 'package:flutter_hbb/models/state_model.dart';
 import 'package:get/get.dart';
 import 'package:window_manager/window_manager.dart';
 
@@ -62,8 +63,6 @@ class _DesktopTabPageState extends State<DesktopTabPage> {
 
   @override
   Widget build(BuildContext context) {
-    RxBool fullscreen = false.obs;
-    Get.put(fullscreen, tag: 'fullscreen');
     final tabWidget = Container(
       child: Overlay(initialEntries: [
         OverlayEntry(builder: (context) {
@@ -84,9 +83,11 @@ class _DesktopTabPageState extends State<DesktopTabPage> {
     );
     return Platform.isMacOS
         ? tabWidget
-        : Obx(() => DragToResizeArea(
-            resizeEdgeSize:
-                fullscreen.value ? kFullScreenEdgeSize : kWindowEdgeSize,
-            child: tabWidget));
+        : Obx(
+            () => DragToResizeArea(
+              resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+              child: tabWidget,
+            ),
+          );
   }
 }
diff --git a/flutter/lib/desktop/pages/file_manager_tab_page.dart b/flutter/lib/desktop/pages/file_manager_tab_page.dart
index 5dd0629fb..66a14bd37 100644
--- a/flutter/lib/desktop/pages/file_manager_tab_page.dart
+++ b/flutter/lib/desktop/pages/file_manager_tab_page.dart
@@ -5,6 +5,7 @@ import 'package:desktop_multi_window/desktop_multi_window.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_hbb/common.dart';
 import 'package:flutter_hbb/consts.dart';
+import 'package:flutter_hbb/models/state_model.dart';
 import 'package:flutter_hbb/desktop/pages/file_manager_page.dart';
 import 'package:flutter_hbb/desktop/widgets/tabbar_widget.dart';
 import 'package:flutter_hbb/utils/multi_window_manager.dart';
@@ -47,7 +48,7 @@ class _FileManagerTabPageState extends State<FileManagerTabPage> {
 
     rustDeskWinManager.setMethodHandler((call, fromWindowId) async {
       print(
-          "[FileTransfer] call ${call.method} with args ${call.arguments} from window ${fromWindowId} to ${windowId()}");
+          "[FileTransfer] call ${call.method} with args ${call.arguments} from window $fromWindowId to ${windowId()}");
       // for simplify, just replace connectionId
       if (call.method == "new_file_transfer") {
         final args = jsonDecode(call.arguments);
@@ -87,9 +88,9 @@ class _FileManagerTabPageState extends State<FileManagerTabPage> {
     return Platform.isMacOS
         ? tabWidget
         : SubWindowDragToResizeArea(
-            resizeEdgeSize: kWindowEdgeSize,
-            windowId: windowId(),
             child: tabWidget,
+            resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+            windowId: stateGlobal.windowId,
           );
   }
 
diff --git a/flutter/lib/desktop/pages/port_forward_tab_page.dart b/flutter/lib/desktop/pages/port_forward_tab_page.dart
index de3ba0d92..c0eea86e6 100644
--- a/flutter/lib/desktop/pages/port_forward_tab_page.dart
+++ b/flutter/lib/desktop/pages/port_forward_tab_page.dart
@@ -5,6 +5,7 @@ import 'package:desktop_multi_window/desktop_multi_window.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_hbb/common.dart';
 import 'package:flutter_hbb/consts.dart';
+import 'package:flutter_hbb/models/state_model.dart';
 import 'package:flutter_hbb/desktop/pages/port_forward_page.dart';
 import 'package:flutter_hbb/desktop/widgets/tabbar_widget.dart';
 import 'package:flutter_hbb/utils/multi_window_manager.dart';
@@ -50,7 +51,7 @@ class _PortForwardTabPageState extends State<PortForwardTabPage> {
 
     rustDeskWinManager.setMethodHandler((call, fromWindowId) async {
       debugPrint(
-          "call ${call.method} with args ${call.arguments} from window ${fromWindowId}");
+          "call ${call.method} with args ${call.arguments} from window $fromWindowId");
       // for simplify, just replace connectionId
       if (call.method == "new_port_forward") {
         final args = jsonDecode(call.arguments);
@@ -98,9 +99,9 @@ class _PortForwardTabPageState extends State<PortForwardTabPage> {
     return Platform.isMacOS
         ? tabWidget
         : SubWindowDragToResizeArea(
-            resizeEdgeSize: kWindowEdgeSize,
-            windowId: windowId(),
             child: tabWidget,
+            resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+            windowId: stateGlobal.windowId,
           );
   }
 
diff --git a/flutter/lib/desktop/pages/remote_page.dart b/flutter/lib/desktop/pages/remote_page.dart
index 05a244802..6fdf44dac 100644
--- a/flutter/lib/desktop/pages/remote_page.dart
+++ b/flutter/lib/desktop/pages/remote_page.dart
@@ -28,15 +28,9 @@ class RemotePage extends StatefulWidget {
   const RemotePage({
     Key? key,
     required this.id,
-    required this.windowId,
-    required this.tabBarHeight,
-    required this.windowBorderWidth,
   }) : super(key: key);
 
   final String id;
-  final int windowId;
-  final double tabBarHeight;
-  final double windowBorderWidth;
 
   @override
   State<RemotePage> createState() => _RemotePageState();
@@ -58,11 +52,6 @@ class _RemotePageState extends State<RemotePage>
 
   late FFI _ffi;
 
-  void _updateTabBarHeight() {
-    _ffi.canvasModel.tabBarHeight = widget.tabBarHeight;
-    _ffi.canvasModel.windowBorderWidth = widget.windowBorderWidth;
-  }
-
   void _initStates(String id) {
     PrivacyModeState.init(id);
     BlockInputState.init(id);
@@ -91,7 +80,6 @@ class _RemotePageState extends State<RemotePage>
 
     _ffi = FFI();
 
-    _updateTabBarHeight();
     Get.put(_ffi, tag: widget.id);
     _ffi.start(widget.id);
     WidgetsBinding.instance.addPostFrameCallback((_) {
@@ -164,7 +152,6 @@ class _RemotePageState extends State<RemotePage>
   @override
   Widget build(BuildContext context) {
     super.build(context);
-    _updateTabBarHeight();
     return WillPopScope(
         onWillPop: () async {
           clientClose(_ffi.dialogManager);
@@ -241,7 +228,6 @@ class _RemotePageState extends State<RemotePage>
     paints.add(QualityMonitor(_ffi.qualityMonitorModel));
     paints.add(RemoteMenubar(
       id: widget.id,
-      windowId: widget.windowId,
       ffi: _ffi,
       onEnterOrLeaveImageSetter: (func) => _onEnterOrLeaveImage4Menubar = func,
       onEnterOrLeaveImageCleaner: () => _onEnterOrLeaveImage4Menubar = null,
diff --git a/flutter/lib/desktop/pages/remote_tab_page.dart b/flutter/lib/desktop/pages/remote_tab_page.dart
index 1a2fe557e..29253d537 100644
--- a/flutter/lib/desktop/pages/remote_tab_page.dart
+++ b/flutter/lib/desktop/pages/remote_tab_page.dart
@@ -6,6 +6,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_hbb/common.dart';
 import 'package:flutter_hbb/common/shared_state.dart';
 import 'package:flutter_hbb/consts.dart';
+import 'package:flutter_hbb/models/state_model.dart';
 import 'package:flutter_hbb/desktop/pages/remote_page.dart';
 import 'package:flutter_hbb/desktop/widgets/tabbar_widget.dart';
 import 'package:flutter_hbb/utils/multi_window_manager.dart';
@@ -34,24 +35,20 @@ class _ConnectionTabPageState extends State<ConnectionTabPage> {
 
   _ConnectionTabPageState(Map<String, dynamic> params) {
     RemoteCountState.init();
-    final RxBool fullscreen = Get.find(tag: 'fullscreen');
     final peerId = params['id'];
     if (peerId != null) {
       ConnectionTypeState.init(peerId);
       tabController.add(TabInfo(
-          key: peerId,
-          label: peerId,
-          selectedIcon: selectedIcon,
-          unselectedIcon: unselectedIcon,
-          onTabCloseButton: () => tabController.closeBy(peerId),
-          page: Obx(() => RemotePage(
-                key: ValueKey(peerId),
-                id: peerId,
-                windowId: windowId(),
-                tabBarHeight:
-                    fullscreen.isTrue ? 0 : kDesktopRemoteTabBarHeight,
-                windowBorderWidth: fullscreen.isTrue ? 0 : kWindowBorderWidth,
-              ))));
+        key: peerId,
+        label: peerId,
+        selectedIcon: selectedIcon,
+        unselectedIcon: unselectedIcon,
+        onTabCloseButton: () => tabController.closeBy(peerId),
+        page: RemotePage(
+          key: ValueKey(peerId),
+          id: peerId,
+        ),
+      ));
       _update_remote_count();
     }
   }
@@ -66,7 +63,6 @@ class _ConnectionTabPageState extends State<ConnectionTabPage> {
       print(
           "call ${call.method} with args ${call.arguments} from window $fromWindowId");
 
-      final RxBool fullscreen = Get.find(tag: 'fullscreen');
       // for simplify, just replace connectionId
       if (call.method == "new_remote_desktop") {
         final args = jsonDecode(call.arguments);
@@ -75,22 +71,13 @@ class _ConnectionTabPageState extends State<ConnectionTabPage> {
         window_on_top(windowId());
         ConnectionTypeState.init(id);
         tabController.add(TabInfo(
-            key: id,
-            label: id,
-            selectedIcon: selectedIcon,
-            unselectedIcon: unselectedIcon,
-            onTabCloseButton: () => tabController.closeBy(id),
-            page: ObxValue<RxBool>(
-              (fullscreen) => RemotePage(
-                id: id,
-                windowId: windowId(),
-                tabBarHeight:
-                    fullscreen.isTrue ? 0 : kDesktopRemoteTabBarHeight,
-                windowBorderWidth: fullscreen.isTrue ? 0 : kWindowBorderWidth,
-              ),
-              fullscreen,
-              key: ValueKey(id),
-            )));
+          key: id,
+          label: id,
+          selectedIcon: selectedIcon,
+          unselectedIcon: unselectedIcon,
+          onTabCloseButton: () => tabController.closeBy(id),
+          page: RemotePage(key: ValueKey(id), id: id),
+        ));
       } else if (call.method == "onDestroy") {
         tabController.clear();
       } else if (call.method == kWindowActionRebuild) {
@@ -105,7 +92,6 @@ class _ConnectionTabPageState extends State<ConnectionTabPage> {
 
   @override
   Widget build(BuildContext context) {
-    final RxBool fullscreen = Get.find(tag: 'fullscreen');
     final tabWidget = Container(
       decoration: BoxDecoration(
           border: Border.all(
@@ -113,61 +99,56 @@ class _ConnectionTabPageState extends State<ConnectionTabPage> {
               width: kWindowBorderWidth)),
       child: Scaffold(
           backgroundColor: Theme.of(context).backgroundColor,
-          body: Obx(() => DesktopTab(
-                controller: tabController,
-                showTabBar: fullscreen.isFalse,
-                onWindowCloseButton: handleWindowCloseButton,
-                tail: const AddButton().paddingOnly(left: 10),
-                pageViewBuilder: (pageView) {
-                  WindowController.fromWindowId(windowId())
-                      .setFullscreen(fullscreen.isTrue);
-                  return pageView;
-                },
-                tabBuilder: (key, icon, label, themeConf) => Obx(() {
-                  final connectionType = ConnectionTypeState.find(key);
-                  if (!connectionType.isValid()) {
-                    return Row(
-                      mainAxisAlignment: MainAxisAlignment.center,
-                      children: [
-                        icon,
-                        label,
-                      ],
-                    );
-                  } else {
-                    final msgDirect = translate(
-                        connectionType.direct.value == ConnectionType.strDirect
-                            ? 'Direct Connection'
-                            : 'Relay Connection');
-                    final msgSecure = translate(
-                        connectionType.secure.value == ConnectionType.strSecure
-                            ? 'Secure Connection'
-                            : 'Insecure Connection');
-                    return Row(
-                      mainAxisAlignment: MainAxisAlignment.center,
-                      children: [
-                        icon,
-                        Tooltip(
-                          message: '$msgDirect\n$msgSecure',
-                          child: SvgPicture.asset(
-                            'assets/${connectionType.secure.value}${connectionType.direct.value}.svg',
-                            width: themeConf.iconSize,
-                            height: themeConf.iconSize,
-                          ).paddingOnly(right: 5),
-                        ),
-                        label,
-                      ],
-                    );
-                  }
-                }),
-              ))),
+          body: DesktopTab(
+            controller: tabController,
+            onWindowCloseButton: handleWindowCloseButton,
+            tail: const AddButton().paddingOnly(left: 10),
+            pageViewBuilder: (pageView) => pageView,
+            tabBuilder: (key, icon, label, themeConf) => Obx(() {
+              final connectionType = ConnectionTypeState.find(key);
+              if (!connectionType.isValid()) {
+                return Row(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    icon,
+                    label,
+                  ],
+                );
+              } else {
+                final msgDirect = translate(
+                    connectionType.direct.value == ConnectionType.strDirect
+                        ? 'Direct Connection'
+                        : 'Relay Connection');
+                final msgSecure = translate(
+                    connectionType.secure.value == ConnectionType.strSecure
+                        ? 'Secure Connection'
+                        : 'Insecure Connection');
+                return Row(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    icon,
+                    Tooltip(
+                      message: '$msgDirect\n$msgSecure',
+                      child: SvgPicture.asset(
+                        'assets/${connectionType.secure.value}${connectionType.direct.value}.svg',
+                        width: themeConf.iconSize,
+                        height: themeConf.iconSize,
+                      ).paddingOnly(right: 5),
+                    ),
+                    label,
+                  ],
+                );
+              }
+            }),
+          )),
     );
     return Platform.isMacOS
         ? tabWidget
-        : Obx(() => SubWindowDragToResizeArea(
-            resizeEdgeSize:
-                fullscreen.value ? kFullScreenEdgeSize : kWindowEdgeSize,
-            windowId: windowId(),
-            child: tabWidget));
+        : SubWindowDragToResizeArea(
+            child: tabWidget,
+            resizeEdgeSize: stateGlobal.resizeEdgeSize.value,
+            windowId: stateGlobal.windowId,
+          );
   }
 
   void onRemoveId(String id) {
diff --git a/flutter/lib/desktop/screen/desktop_remote_screen.dart b/flutter/lib/desktop/screen/desktop_remote_screen.dart
index 4d045d02b..57886b2f2 100644
--- a/flutter/lib/desktop/screen/desktop_remote_screen.dart
+++ b/flutter/lib/desktop/screen/desktop_remote_screen.dart
@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 import 'package:flutter_hbb/common.dart';
 import 'package:flutter_hbb/desktop/pages/remote_tab_page.dart';
 import 'package:flutter_hbb/desktop/widgets/refresh_wrapper.dart';
-import 'package:get/get.dart';
 import 'package:provider/provider.dart';
 
 /// multi-tab desktop remote screen
@@ -13,8 +12,6 @@ class DesktopRemoteScreen extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    RxBool fullscreen = false.obs;
-    Get.put(fullscreen, tag: 'fullscreen');
     return MultiProvider(
         providers: [
           ChangeNotifierProvider.value(value: gFFI.ffiModel),
diff --git a/flutter/lib/desktop/widgets/remote_menubar.dart b/flutter/lib/desktop/widgets/remote_menubar.dart
index 86a169b7b..6a9bbeb1a 100644
--- a/flutter/lib/desktop/widgets/remote_menubar.dart
+++ b/flutter/lib/desktop/widgets/remote_menubar.dart
@@ -6,6 +6,7 @@ import 'dart:ui' as ui;
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_hbb/models/chat_model.dart';
+import 'package:flutter_hbb/models/state_model.dart';
 import 'package:get/get.dart';
 import 'package:provider/provider.dart';
 import 'package:rxdart/rxdart.dart' as rxdart;
@@ -29,7 +30,6 @@ class _MenubarTheme {
 
 class RemoteMenubar extends StatefulWidget {
   final String id;
-  final int windowId;
   final FFI ffi;
   final Function(Function(bool)) onEnterOrLeaveImageSetter;
   final Function() onEnterOrLeaveImageCleaner;
@@ -37,7 +37,6 @@ class RemoteMenubar extends StatefulWidget {
   const RemoteMenubar({
     Key? key,
     required this.id,
-    required this.windowId,
     required this.ffi,
     required this.onEnterOrLeaveImageSetter,
     required this.onEnterOrLeaveImageCleaner,
@@ -55,9 +54,12 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
   bool _isCursorOverImage = false;
   window_size.Screen? _screen;
 
-  bool get isFullscreen => Get.find<RxBool>(tag: 'fullscreen').isTrue;
+  int get windowId => stateGlobal.windowId;
+
+  bool get isFullscreen => stateGlobal.fullscreen;
   void _setFullscreen(bool v) {
-    Get.find<RxBool>(tag: 'fullscreen').value = v;
+    stateGlobal.setFullscreen(v);
+    setState(() {});
   }
 
   @override
@@ -213,7 +215,7 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
       onPressed: () {
         _setFullscreen(!isFullscreen);
       },
-      icon: Obx(() => isFullscreen
+      icon: isFullscreen
           ? const Icon(
               Icons.fullscreen_exit,
               color: _MenubarTheme.commonColor,
@@ -221,7 +223,7 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
           : const Icon(
               Icons.fullscreen,
               color: _MenubarTheme.commonColor,
-            )),
+            ),
     );
   }
 
@@ -920,8 +922,7 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
                 _setFullscreen(false);
                 double scale = _screen!.scaleFactor;
                 final wndRect =
-                    await WindowController.fromWindowId(widget.windowId)
-                        .getFrame();
+                    await WindowController.fromWindowId(windowId).getFrame();
                 final mediaSize = MediaQueryData.fromWindow(ui.window).size;
                 // On windows, wndRect is equal to GetWindowRect and mediaSize is equal to GetClientRect.
                 // https://stackoverflow.com/a/7561083
@@ -944,8 +945,7 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
                 double top = wndRect.top + (wndRect.height - height) / 2;
 
                 Rect frameRect = _screen!.frame;
-                final RxBool fullscreen = Get.find(tag: 'fullscreen');
-                if (fullscreen.isFalse) {
+                if (!isFullscreen) {
                   frameRect = _screen!.visibleFrame;
                 }
                 if (left < frameRect.left) {
@@ -960,7 +960,7 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
                 if ((top + height) > frameRect.bottom) {
                   top = frameRect.bottom - height;
                 }
-                await WindowController.fromWindowId(widget.windowId)
+                await WindowController.fromWindowId(windowId)
                     .setFrame(Rect.fromLTWH(left, top, width, height));
               }
             }();
diff --git a/flutter/lib/desktop/widgets/tabbar_widget.dart b/flutter/lib/desktop/widgets/tabbar_widget.dart
index 7fae47e69..0b28bca41 100644
--- a/flutter/lib/desktop/widgets/tabbar_widget.dart
+++ b/flutter/lib/desktop/widgets/tabbar_widget.dart
@@ -9,6 +9,7 @@ import 'package:flutter_hbb/common.dart';
 import 'package:flutter_hbb/consts.dart';
 import 'package:flutter_hbb/main.dart';
 import 'package:flutter_hbb/models/platform_model.dart';
+import 'package:flutter_hbb/models/state_model.dart';
 import 'package:get/get.dart';
 import 'package:get/get_rx/src/rx_workers/utils/debouncer.dart';
 import 'package:scroll_pos/scroll_pos.dart';
@@ -179,7 +180,6 @@ typedef LabelGetter = Rx<String> Function(String key);
 int _lastClickTime = DateTime.now().millisecondsSinceEpoch;
 
 class DesktopTab extends StatelessWidget {
-  final bool showTabBar;
   final bool showLogo;
   final bool showTitle;
   final bool showMinimize;
@@ -206,7 +206,6 @@ class DesktopTab extends StatelessWidget {
   DesktopTab({
     Key? key,
     required this.controller,
-    this.showTabBar = true,
     this.showLogo = true,
     this.showTitle = true,
     this.showMinimize = true,
@@ -229,8 +228,8 @@ class DesktopTab extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Column(children: [
-      Offstage(
-          offstage: !showTabBar,
+      Obx(() => Offstage(
+          offstage: !stateGlobal.showTabBar.isTrue,
           child: SizedBox(
             height: _kTabBarHeight,
             child: Column(
@@ -245,7 +244,7 @@ class DesktopTab extends StatelessWidget {
                 ),
               ],
             ),
-          )),
+          ))),
       Expanded(
           child: pageViewBuilder != null
               ? pageViewBuilder!(_buildPageView())
diff --git a/flutter/lib/main.dart b/flutter/lib/main.dart
index b3f74f930..df314396f 100644
--- a/flutter/lib/main.dart
+++ b/flutter/lib/main.dart
@@ -1,8 +1,8 @@
 import 'dart:convert';
-import 'dart:io';
 
 import 'package:desktop_multi_window/desktop_multi_window.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_hbb/models/state_model.dart';
 import 'package:flutter_hbb/desktop/pages/desktop_tab_page.dart';
 import 'package:flutter_hbb/desktop/pages/server_page.dart';
 import 'package:flutter_hbb/desktop/pages/install_page.dart';
@@ -15,7 +15,6 @@ import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:get/get.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
-import 'package:uni_links_desktop/uni_links_desktop.dart';
 import 'package:window_manager/window_manager.dart';
 
 // import 'package:window_manager/window_manager.dart';
@@ -41,11 +40,14 @@ Future<void> main(List<String> args) async {
   // main window
   if (args.isNotEmpty && args.first == 'multi_window') {
     windowId = int.parse(args[1]);
+    stateGlobal.setWindowId(windowId!);
     WindowController.fromWindowId(windowId!).showTitleBar(false);
     final argument = args[2].isEmpty
         ? <String, dynamic>{}
         : jsonDecode(args[2]) as Map<String, dynamic>;
     int type = argument['type'] ?? -1;
+    // to-do: No need to parse window id ?
+    // Because stateGlobal.windowId is a global value.
     argument['windowId'] = windowId;
     WindowType wType = type.windowType;
     switch (wType) {
diff --git a/flutter/lib/models/input_model.dart b/flutter/lib/models/input_model.dart
index 21278367f..2469ee0d9 100644
--- a/flutter/lib/models/input_model.dart
+++ b/flutter/lib/models/input_model.dart
@@ -10,6 +10,7 @@ import '../../models/model.dart';
 import '../../models/platform_model.dart';
 import '../common.dart';
 import '../consts.dart';
+import './state_model.dart';
 import 'dart:ui' as ui;
 
 /// Mouse button enum.
@@ -321,9 +322,7 @@ class InputModel {
     double x = evt['x'];
     double y = max(0.0, evt['y']);
     if (isDesktop) {
-      final RxBool fullscreen = Get.find(tag: 'fullscreen');
-      final tabBarHeight = fullscreen.isTrue ? 0 : kDesktopRemoteTabBarHeight;
-      y = y - tabBarHeight;
+      y = y - stateGlobal.tabBarHeight;
     }
     final canvasModel = parent.target!.canvasModel;
     final ffiModel = parent.target!.ffiModel;
diff --git a/flutter/lib/models/model.dart b/flutter/lib/models/model.dart
index 54d77ca95..ff26296da 100644
--- a/flutter/lib/models/model.dart
+++ b/flutter/lib/models/model.dart
@@ -14,6 +14,7 @@ import 'package:flutter_hbb/models/chat_model.dart';
 import 'package:flutter_hbb/models/file_model.dart';
 import 'package:flutter_hbb/models/server_model.dart';
 import 'package:flutter_hbb/models/user_model.dart';
+import 'package:flutter_hbb/models/state_model.dart';
 import 'package:flutter_hbb/utils/multi_window_manager.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:tuple/tuple.dart';
@@ -483,9 +484,9 @@ class CanvasModel with ChangeNotifier {
   // image scale
   double _scale = 1.0;
   // the tabbar over the image
-  double tabBarHeight = 0.0;
+  // double tabBarHeight = 0.0;
   // the window border's width
-  double windowBorderWidth = 0.0;
+  // double windowBorderWidth = 0.0;
   // remote id
   String id = '';
   // scroll offset x percent
@@ -571,6 +572,9 @@ class CanvasModel with ChangeNotifier {
     return parent.target?.ffiModel.display.height ?? defaultHeight;
   }
 
+  double get windowBorderWidth => stateGlobal.windowBorderWidth;
+  double get tabBarHeight => stateGlobal.tabBarHeight;
+
   Size get size {
     final size = MediaQueryData.fromWindow(ui.window).size;
     return Size(size.width - windowBorderWidth * 2,
diff --git a/flutter/lib/models/state_model.dart b/flutter/lib/models/state_model.dart
new file mode 100644
index 000000000..f6e3820b9
--- /dev/null
+++ b/flutter/lib/models/state_model.dart
@@ -0,0 +1,35 @@
+import 'package:desktop_multi_window/desktop_multi_window.dart';
+import 'package:get/get.dart';
+
+import '../consts.dart';
+
+class StateGlobal {
+  int _windowId = -1;
+  bool _fullscreen = false;
+  final RxBool _showTabBar = true.obs;
+  final RxDouble _resizeEdgeSize = 8.0.obs;
+
+  int get windowId => _windowId;
+  bool get fullscreen => _fullscreen;
+  double get tabBarHeight => fullscreen ? 0 : kDesktopRemoteTabBarHeight;
+  double get windowBorderWidth => fullscreen ? 0 : kWindowBorderWidth;
+  RxBool get showTabBar => _showTabBar;
+  RxDouble get resizeEdgeSize => _resizeEdgeSize;
+
+  setWindowId(int id) => _windowId = id;
+  setFullscreen(bool v) {
+    if (_fullscreen != v) {
+      _fullscreen = v;
+      _showTabBar.value = !_fullscreen;
+      _resizeEdgeSize.value =
+          fullscreen ? kFullScreenEdgeSize : kWindowEdgeSize;
+      WindowController.fromWindowId(windowId).setFullscreen(_fullscreen);
+    }
+  }
+
+  StateGlobal._();
+
+  static final StateGlobal instance = StateGlobal._();
+}
+
+final stateGlobal = StateGlobal.instance;