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Src/Xceed.Wpf.Toolkit/PropertyGrid/Implementation/Editors/SourceComboBoxEditor.cs

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+/*************************************************************************************
+
+   Extended WPF Toolkit
+
+   Copyright (C) 2007-2013 Xceed Software Inc.
+
+   This program is provided to you under the terms of the Microsoft Public
+   License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license 
+
+   For more features, controls, and fast professional support,
+   pick up the Plus Edition at http://xceed.com/wpf_toolkit
+
+   Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
+
+  ***********************************************************************************/
+
+using System;
+using System.Collections;
+using System.ComponentModel;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace Xceed.Wpf.Toolkit.PropertyGrid.Editors
+{
+  public class SourceComboBoxEditor : ComboBoxEditor
+  {
+    ICollection _collection;
+    TypeConverter _typeConverter;
+
+    public SourceComboBoxEditor( ICollection collection, TypeConverter typeConverter )
+    {
+      _collection = collection;
+      _typeConverter = typeConverter;
+    }
+
+    protected override IEnumerable CreateItemsSource( PropertyItem propertyItem )
+    {
+      return _collection;
+    }
+
+    protected override IValueConverter CreateValueConverter()
+    {
+      //When using a stringConverter, we need to convert the value
+      if( (_typeConverter != null) && (_typeConverter is StringConverter) )
+        return new SourceComboBoxEditorConverter( _typeConverter );
+      return null;
+    }
+  }
+
+  internal class SourceComboBoxEditorConverter : IValueConverter
+  {
+    private TypeConverter _typeConverter;
+
+    internal SourceComboBoxEditorConverter( TypeConverter typeConverter )
+    {
+      _typeConverter = typeConverter;
+    }
+
+    public object Convert( object value, Type targetType, object parameter, CultureInfo culture )
+    {
+      if( _typeConverter != null )
+      {
+        if( _typeConverter.CanConvertTo( typeof(string) ) )
+          return _typeConverter.ConvertTo( value, typeof(string) );
+      }
+      return value;
+    }
+
+    public object ConvertBack( object value, Type targetType, object parameter, CultureInfo culture )
+    {
+      if( _typeConverter != null )
+      {
+        if( _typeConverter.CanConvertFrom( value.GetType() ) )
+          return _typeConverter.ConvertFrom( value );
+      }
+      return value;
+    }
+  }
+}