Added ShapeToDataConverter

Wpf/ShapeToDataConverter.cs

@@ -0,0 +1,60 @@
+/*
+SpiroNet.Wpf
+Copyright (C) 2015 Wiesław Šoltés
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 3
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.
+
+*/
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using SpiroNet;
+
+namespace SpiroNet.Wpf
+{
+    internal class ShapeToDataConverter : IMultiValueConverter
+    {
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (values == null || values.Length != 2)
+                return null;
+            
+            var shape = values[0] as PathShape;
+            var dict = values[1] as IDictionary<PathShape, string>;
+            if (shape == null || dict == null)
+                return null;
+            
+            string data;
+            if (!dict.TryGetValue(shape, out data))
+                return null;
+            
+            return data;
+        }
+    
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}