flutter_desktop: remote rxbool of fullscreen

Signed-off-by: fufesou <shuanglongchen@yeah.net>

flutter/lib/models/state_model.dart

@@ -0,0 +1,33 @@
+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;
+
+  int get windowId => _windowId;
+  bool get fullscreen => _fullscreen;
+  double get tabBarHeight => fullscreen ? 0 : kDesktopRemoteTabBarHeight;
+  double get windowBorderWidth => fullscreen ? 0 : kWindowBorderWidth;
+  RxBool get showTabBar => _showTabBar;
+  double get resizeEdgeSize =>
+      fullscreen ? kFullScreenEdgeSize : kWindowEdgeSize;
+
+  setWindowId(int id) => _windowId = id;
+  setFullscreen(bool v) {
+    if (_fullscreen != v) {
+      _fullscreen = v;
+      _showTabBar.value = !_fullscreen;
+      WindowController.fromWindowId(windowId).setFullscreen(_fullscreen);
+    }
+  }
+
+  StateGlobal._();
+
+  static final StateGlobal instance = StateGlobal._();
+}
+
+final stateGlobal = StateGlobal.instance;