Adjust project structure

src/Shared/HandyControl_Shared/Expression/Media/GeometryEffectConverter.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Globalization;
+
+namespace HandyControl.Expression.Media
+{
+    public sealed class GeometryEffectConverter : TypeConverter
+    {
+        private static readonly Dictionary<string, GeometryEffect> RegisteredEffects;
+
+        static GeometryEffectConverter()
+        {
+            var dictionary = new Dictionary<string, GeometryEffect>
+            {
+                {
+                    "None",
+                    GeometryEffect.DefaultGeometryEffect
+                },
+                {
+                    "Sketch",
+                    new SketchGeometryEffect()
+                }
+            };
+            RegisteredEffects = dictionary;
+        }
+
+        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
+        {
+            return typeof(string).IsAssignableFrom(sourceType);
+        }
+
+        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
+        {
+            return typeof(string).IsAssignableFrom(destinationType);
+        }
+
+        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
+        {
+            if (value is string key && RegisteredEffects.TryGetValue(key, out var effect))
+                return effect.CloneCurrentValue();
+            return null;
+        }
+
+        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value,
+            Type destinationType)
+        {
+            if (typeof(string).IsAssignableFrom(destinationType))
+            {
+                if (value is string) return value;
+                foreach (var pair in RegisteredEffects)
+                    if (pair.Value?.Equals(value as GeometryEffect) ?? value == null)
+                        return pair.Key;
+            }
+
+            return null;
+        }
+    }
+}