port from perforce

intromat/Intromat/Views/Converters/TypeVisibilityCheck.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace Intromat.Views.Converters
+{
+    /// <summary>
+    ///     Given an object o and a type t, return Visible if o is of type t, else return Collapsed.
+    /// </summary>
+    public class TypeVisibilityCheck : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return ((Type)parameter).IsInstanceOfType(value) ? Visibility.Visible : Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}