完善Pie饼图的交互动画效果

Runtime/Component/Child/MLValue.cs

@@ -10,20 +10,24 @@ namespace XCharts.Runtime
     [System.Serializable]
     public class MLValue : ChildComponent
     {
+        /// <summary>
+        /// the type of value.
+        /// |数值类型。
+        /// </summary>
         public enum Type
         {
             /// <summary>
-            /// Percent form.
+            /// Percent value form.
             /// |百分比形式。
             /// </summary>
             Percent,
             /// <summary>
-            /// Absolute form.
+            /// Absolute value form.
             /// |绝对值形式。
             /// </summary>
             Absolute,
             /// <summary>
-            /// Extra form.
+            /// Extra value form.
             /// |额外形式。
             /// </summary>
             Extra
@@ -34,18 +38,24 @@ namespace XCharts.Runtime
         public Type type { get { return m_Type; } set { m_Type = value; } }
         public float value { get { return m_Value; } set { m_Value = value; } }
 
-        public MLValue(Type type, float value)
-        {
-            m_Type = type;
-            m_Value = value;
-        }
-
         public MLValue(float value)
         {
             m_Type = Type.Percent;
             m_Value = value;
         }
 
+        public MLValue(Type type, float value)
+        {
+            m_Type = type;
+            m_Value = value;
+        }
+
+        /// <summary>
+        /// Get the value by type.
+        /// |根据类型获取值。
+        /// </summary>
+        /// <param name="total">默认值</param>
+        /// <returns></returns>
         public float GetValue(float total)
         {
             switch (m_Type)