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

   1 //------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //------------------------------------------------------------
   4
   5 namespace System.Activities.Presentation.View
   6 {
   7     using System.Globalization;
   8     using System.Windows.Data;
   9     using System.Windows;
  10
  11     sealed class CanExpandCollapseAllConverter : IValueConverter
  12     {
  13         public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  14         {
  15             if (value == null || value == DependencyProperty.UnsetValue)
  16             {
  17                 return false;
  18             }
  19
  20             ActivityDesignerOptionsAttribute attr = WorkflowViewService.GetAttribute<ActivityDesignerOptionsAttribute>(value.GetType());
  21             return attr == null || !attr.AlwaysCollapseChildren;
  22         }
  23
  24         public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  25         {
  26             throw FxTrace.Exception.AsError(new NotSupportedException());
  27         }
  28     }
  29 }