mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Hosting/WorkflowCommandExtensionItem.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4
   5 namespace System.Activities.Presentation.Hosting
   6 {
   7     //WorkflowCommandExtensionItem - this class allows user to update each workflow's designer command
   8     //(i.e. input gestures collection). user has to provide IWorkflowCommandExtensionCallback implementation
   9     //to get notifications flowing in.
  10     public sealed class WorkflowCommandExtensionItem : ContextItem
  11     {
  12         public WorkflowCommandExtensionItem()
  13         {
  14         }
  15
  16         public WorkflowCommandExtensionItem(IWorkflowCommandExtensionCallback callback)
  17         {
  18             if (null == callback)
  19             {
  20                 throw FxTrace.Exception.AsError(new ArgumentNullException("callback"));
  21             }
  22             this.CommandExtensionCallback = callback;
  23         }
  24
  25         public override Type ItemType
  26         {
  27             get { return typeof(WorkflowCommandExtensionItem); }
  28         }
  29
  30         internal IWorkflowCommandExtensionCallback CommandExtensionCallback
  31         {
  32             get;
  33             private set;
  34         }
  35     }
  36 }