优化桌面端折叠菜单

yy-admin-master/YY.Admin/ViewModels/MainWindowViewModel.cs

@@ -165,6 +165,18 @@ namespace YY.Admin.ViewModels
             set => SetProperty(ref _isAppSettingsOpen, value);
         }
 
+        /// <summary>
+        /// 为 true 时隐藏左侧功能菜单树（次级侧栏）
+        /// </summary>
+        private bool _isMenuTreePanelCollapsed;
+        public bool IsMenuTreePanelCollapsed
+        {
+            get => _isMenuTreePanelCollapsed;
+            set => SetProperty(ref _isMenuTreePanelCollapsed, value);
+        }
+
+        private NavItem? _menuTreeToggleNavItem;
+
         private AppSettingsViewModel? _appSettingsViewModel;
         public AppSettingsViewModel? AppSettingsViewModel {
             get => _appSettingsViewModel;
@@ -175,6 +187,7 @@ namespace YY.Admin.ViewModels
         public ICommand ResetAppSettingsCommand { get; }
         public ICommand OpenAppSettingsCommand { get; }
         public ICommand OpenServerSettingsCommand { get; }
+        public ICommand ToggleMenuTreePanelCommand { get; }
 
         #endregion
 
@@ -212,6 +225,7 @@ namespace YY.Admin.ViewModels
             OpenAppSettingsCommand = new DelegateCommand(OpenAppSettings);
             ResetAppSettingsCommand = new DelegateCommand(ResetAppSettings);
             OpenServerSettingsCommand = new DelegateCommand(OpenServerSettings);
+            ToggleMenuTreePanelCommand = new DelegateCommand(ToggleMenuTreePanel);
 
             // 初始化Sidebar数据
             InitNavItems();
@@ -300,6 +314,13 @@ namespace YY.Admin.ViewModels
                     Name = "Tab区域",
                     Command = new DelegateCommand<NavItem>(OnOpenOrActivateTab)
                 },
+                (_menuTreeToggleNavItem = new NavItem {
+                    Icon = "ChevronDoubleLeft",
+                    Name = "折叠菜单",
+                    AlignBottom = true,
+                    IsActive = false,
+                    Command = ToggleMenuTreePanelCommand
+                }),
                 new NavItem {
                     Icon = "Server",
                     Name = "服务器设置",
@@ -678,6 +699,29 @@ namespace YY.Admin.ViewModels
             }
         }
 
+        /// <summary>
+        /// 折叠 / 展示左侧菜单树区域
+        /// </summary>
+        private void ToggleMenuTreePanel()
+        {
+            IsMenuTreePanelCollapsed = !IsMenuTreePanelCollapsed;
+            if (_menuTreeToggleNavItem == null)
+            {
+                return;
+            }
+
+            if (IsMenuTreePanelCollapsed)
+            {
+                _menuTreeToggleNavItem.Name = "展示菜单";
+                _menuTreeToggleNavItem.Icon = "ChevronDoubleRight";
+            }
+            else
+            {
+                _menuTreeToggleNavItem.Name = "折叠菜单";
+                _menuTreeToggleNavItem.Icon = "ChevronDoubleLeft";
+            }
+        }
+
         private void OpenServerSettings()
         {
             _dialogService.ShowDialog("ServerSettingsDialog", r =>