mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Converters/OutlineViewTextConverter.cs

   1 //----------------------------------------------------------------
   2 // <copyright company="Microsoft Corporation">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //----------------------------------------------------------------
   6
   7 namespace System.Activities.Presentation.Converters
   8 {
   9     using System.Activities.Presentation.Model;
  10     using System.Globalization;
  11     using System.Runtime;
  12     using System.Windows;
  13     using System.Windows.Data;
  14     using Microsoft.Activities.Presentation;
  15
  16     internal class OutlineViewTextConverter : IMultiValueConverter
  17     {
  18         public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
  19         {
  20             string displayName = string.Empty;
  21             if (values[0] != DependencyProperty.UnsetValue)
  22             {
  23                 displayName = values[0] as string;
  24             }
  25
  26             if (string.IsNullOrEmpty(displayName) && values[1] != DependencyProperty.UnsetValue)
  27             {
  28                 ModelItem modelItem = values[1] as ModelItem;
  29                 if (modelItem != null)
  30                 {
  31                     ModelProperty nameProperty = modelItem.Properties["Name"];
  32                     if (nameProperty != null && nameProperty.Value != null)
  33                     {
  34                         displayName = nameProperty.Value.GetCurrentValue() as string;
  35                     }
  36
  37                     if (string.IsNullOrEmpty(displayName))
  38                     {
  39                         Fx.Assert(modelItem.ItemType != null && modelItem.ItemType.Name != null, "ModelItem should always have a name");
  40                         displayName = TypeNameHelper.GetDisplayName(modelItem.ItemType, false);
  41                     }
  42                 }
  43             }
  44
  45             return displayName;
  46         }
  47
  48         public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
  49         {
  50             throw FxTrace.Exception.AsError(new InvalidOperationException());
  51         }
  52     }
  53 }