mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/View/ModelPropertyPathExpanderConverter.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4
   5 namespace System.Activities.Presentation.View
   6 {
   7     using System;
   8     using System.Activities.Presentation.Internal.PropertyEditing.Model;
   9     using System.Activities.Presentation.Model;
  10     using System.Globalization;
  11     using System.Text;
  12     using System.Windows.Data;
  13
  14     sealed class ModelPropertyPathExpanderConverter : IValueConverter
  15     {
  16         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  17         {
  18             string result = null;
  19
  20             if (value != null)
  21             {
  22                 ModelPropertyEntry modelPropertyEntry = value as ModelPropertyEntry;
  23                 if (modelPropertyEntry != null)
  24                 {
  25                     StringBuilder propertyPath = new StringBuilder(modelPropertyEntry.PropertyName);
  26                     propertyPath.Insert(0, '.');
  27
  28                     ModelProperty property = modelPropertyEntry.FirstModelProperty;
  29                     if (property != null)
  30                     {
  31                         ModelItem convertedValue = property.Parent;
  32                         while (convertedValue != null && !typeof(Activity).IsAssignableFrom(convertedValue.ItemType))
  33                         {
  34                             if (null != convertedValue.Source)
  35                             {
  36                                 propertyPath.Insert(0, convertedValue.Source.Name);
  37                                 propertyPath.Insert(0, '.');
  38                             }
  39                             convertedValue = convertedValue.Parent;
  40                         }
  41                     }
  42                     propertyPath.Remove(0, 1);
  43                     result = propertyPath.ToString();
  44                 }
  45             }
  46             return result;
  47         }
  48
  49         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  50         {
  51             throw FxTrace.Exception.AsError( new NotSupportedException(SR.NonSupportedModelPropertyPathExpanderConverterConvertBack));
  52         }
  53     }
  54 }