0.2版本，重构代码，增加Editor

Assets/XCharts/Scripts/UI/Internal/Pie.cs

@@ -0,0 +1,46 @@
+using UnityEngine;
+
+namespace XCharts
+{
+    [System.Serializable]
+    public class Pie
+    {
+        [SerializeField] private string m_Name;
+        [SerializeField] private float m_InsideRadius;
+        [SerializeField] private float m_OutsideRadius;
+        [SerializeField] private float m_TooltipExtraRadius;
+        [SerializeField] private bool m_Rose;
+        [SerializeField] private float m_Space;
+        [SerializeField] private float m_Left;
+        [SerializeField] private float m_Right;
+        [SerializeField] private float m_Top;
+        [SerializeField] private float m_Bottom;
+
+        public string name { get { return m_Name; } set { m_Name = value; } }
+        public float insideRadius { get { return m_InsideRadius; } set { m_InsideRadius = value; } }
+        public float outsideRadius { get { return m_OutsideRadius; } set { m_OutsideRadius = value; } }
+        public float tooltipExtraRadius { get { return m_TooltipExtraRadius; } set { m_TooltipExtraRadius = value; } }
+        public bool rose { get { return m_Rose; } set { m_Rose = value; } }
+        public float space { get { return m_Space; } set { m_Space = value; } }
+        public float left { get { return m_Left; } set { m_Left = value; } }
+        public float right { get { return m_Right; } set { m_Right = value; } }
+        public float top { get { return m_Top; } set { m_Top = value; } }
+        public float bottom { get { return m_Bottom; } set { m_Bottom = value; } }
+
+        public static Pie defaultPie
+        {
+            get
+            {
+                var pie = new Pie
+                {
+                    m_Name = "Pie",
+                    m_InsideRadius = 0f,
+                    m_OutsideRadius = 80f,
+                    m_TooltipExtraRadius = 10f,
+                    m_Rose = false
+                };
+                return pie;
+            }
+        }
+    }
+}