mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Base/Core/Internal/PropertyEditing/Selection/SelectionPath.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4 namespace System.Activities.Presentation.Internal.PropertyEditing.Selection
   5 {
   6     using System.ComponentModel;
   7     using System.Diagnostics;
   8
   9     // <summary>
  10     // A class we use to describe what visual element is currently selected within
  11     // the CategoryList class (property, category, category editor, ...)
  12     // </summary>
  13     internal class SelectionPath
  14     {
  15         private string _pathTypeId;
  16         private string _path;
  17
  18         // <summary>
  19         // Creates a new instance of SelectionPath with the specified
  20         // path ID and path.
  21         // </summary>
  22         // <param name="pathTypeId">Token that identifies the ISelectionPathInterpreter
  23         // that knows how to resolve the specified path</param>
  24         // <param name="path">Path to the selected object</param>
  25         public SelectionPath(string pathTypeId, string path)
  26         {
  27             _pathTypeId = pathTypeId;
  28             _path = path;
  29         }
  30
  31         // <summary>
  32         // Gets the token that identifies the ISelectionPathInterpreter that knows how
  33         // to resolve the contained path.
  34         // </summary>
  35         public string PathTypeId
  36         { get { return _pathTypeId; } }
  37
  38         // <summary>
  39         // Gets the path itself.
  40         // </summary>
  41         public string Path
  42         { get { return _path; } }
  43
  44         // <summary>
  45         // Packages this instance into a serializable object
  46         // </summary>
  47         public object State
  48         {
  49             get {
  50                 return new string[] { _pathTypeId, _path };
  51             }
  52         }
  53
  54         // <summary>
  55         // Converts the serializable object returned by the State property
  56         // back into an instance of SelectionPath
  57         // </summary>
  58         // <param name="state">State to convert</param>
  59         // <returns>Instance of SelectionPath represented by the given state object</returns>
  60         public static SelectionPath FromState(object state)
  61         {
  62             string[] values = state as string[];
  63             if (values == null || values.Length != 2)
  64             {
  65                 Debug.Fail("Invalid SelectionPath State object");
  66                 return null;
  67             }
  68
  69             return new SelectionPath(values[0], values[1]);
  70         }
  71     }
  72 }