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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.Reflection;
  6. using System.Windows.Input;
  7.  
  8. namespace Livet
  9. {
  10.     public static class LivetCommandManager
  11.     {
  12.         static LivetCommandManager()
  13.         {
  14.             InputManager.Current.PostProcessInput += new ProcessInputEventHandler(RaisedPostProcessInput);
  15.  
  16.             var primaryCommandDevice = typeof(InputManager)
  17.                 .GetProperty("PrimaryCommandDevice", BindingFlags.Instance | BindingFlags.NonPublic)
  18.                 .GetValue(InputManager.Current, null);
  19.  
  20.             var preProcessInput = primaryCommandDevice.GetType()
  21.                 .GetMethod("PreProcessInput", BindingFlags.Instance | BindingFlags.NonPublic);
  22.  
  23.             var postProcessInput = primaryCommandDevice.GetType()
  24.                 .GetMethod("PostProcessInput", BindingFlags.Instance | BindingFlags.NonPublic);
  25.  
  26.             var preProcessInputDelegate = Delegate.CreateDelegate(typeof(PreProcessInputEventHandler), primaryCommandDevice, preProcessInput);
  27.             var postProcessInputDelegate = Delegate.CreateDelegate(typeof(ProcessInputEventHandler), primaryCommandDevice, postProcessInput);
  28.  
  29.             typeof(InputManager).GetEvent("PreProcessInput").RemoveEventHandler(InputManager.Current, preProcessInputDelegate);
  30.             typeof(InputManager).GetEvent("PostProcessInput").RemoveEventHandler(InputManager.Current, postProcessInputDelegate);
  31.  
  32.             Mode = InvalidateRequerySuggestedMode.Default;
  33.         }
  34.  
  35.         private static void RaisedPostProcessInput(object sender, ProcessInputEventArgs e)
  36.         {
  37.             if (Mode == InvalidateRequerySuggestedMode.Default || Mode == InvalidateRequerySuggestedMode.Full)
  38.             {
  39.                 var routedEvent = e.StagingItem.Input.RoutedEvent;
  40.  
  41.                 if (routedEvent == Keyboard.KeyUpEvent ||
  42.                     routedEvent == Mouse.MouseUpEvent ||
  43.                     routedEvent == Keyboard.GotKeyboardFocusEvent ||
  44.                     routedEvent == Keyboard.LostKeyboardFocusEvent)
  45.                 {
  46.                     CommandManager.InvalidateRequerySuggested();
  47.                 }
  48.             }
  49.         }
  50.  
  51.         public static InvalidateRequerySuggestedMode Mode
  52.         {
  53.             get;
  54.             set;
  55.         }
  56.     }
  57.  
  58.     public enum InvalidateRequerySuggestedMode
  59.     {
  60.         None,
  61.         Default,
  62.         Full
  63.     }
  64. }
  65.  
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https://ideone.com/5wXDP
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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