[SharpDevelop]菜单状态更新

方式一

在Idle方法中更新

 1 void OnApplicationIdle(object sender, EventArgs e)  2  {  3             // Use the Idle event to update the status of menu and toolbar.  4             // Depending on your application and the number of menu items with complex conditions,  5             // you might want to update the status less frequently.

 6  UpdateMenuItemStatus();  7  }  8         

 9         /// <summary>Update Enabled/Visible state of items in the main menu based on conditions</summary>

10         void UpdateMenuItemStatus() 11  { 12             foreach (ToolStripItem item in menu.Items) { 13                 if (item is IStatusUpdate) 14                     (item as IStatusUpdate).UpdateStatus(); 15  } 16         }

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方式二

sealed class DefaultWorkbench : Form, IWorkbench

通过一个Timer来更新

1 toolbarUpdateTimer =  new System.Windows.Forms.Timer(); 2 toolbarUpdateTimer.Tick += new EventHandler(UpdateMenu);

 1 void UpdateMenu(object sender, EventArgs e)  2  {  3  UpdateMenus();  4  UpdateToolbars();  5  }  6         

 7         void UpdateMenus()  8  {  9             // update menu

10             foreach (object o in TopMenu.Items) { 11                 if (o is IStatusUpdate) { 12  ((IStatusUpdate)o).UpdateStatus(); 13  } 14  } 15  } 16         

17         void UpdateToolbars() 18  { 19             if (ToolBars != null) { 20                 foreach (ToolStrip toolStrip in ToolBars) { 21  ToolbarService.UpdateToolbar(toolStrip); 22  } 23  } 24         }

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方式三

sealed partial class WpfWorkbench : FullScreenEnabledWindow, IWorkbench, System.Windows.Forms.IWin32Window

1   requerySuggestedEventHandler = new EventHandler(CommandManager_RequerySuggested); 2   CommandManager.RequerySuggested += requerySuggestedEventHandler;

 1 EventHandler requerySuggestedEventHandler;  2 

 3 void CommandManager_RequerySuggested(object sender, EventArgs e)  4 {  5  UpdateMenu();  6 }  7 void UpdateMenu()  8 {  9  MenuService.UpdateStatus(mainMenu.ItemsSource); 10         foreach (ToolBar tb in toolBars) 11  { 12  ToolBarService.UpdateStatus(tb.ItemsSource); 13  } 14 }

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