[feature][serie] support the colorBy of serie

Runtime/Serie/Serie.cs

@@ -194,6 +194,29 @@ namespace XCharts.Runtime
         Auto
     }
 
+    /// <summary>
+    /// The policy to take color from theme.
+    /// |从主题中取色策略。
+    /// </summary>
+    public enum SerieColorBy
+    {
+        /// <summary>
+        /// Select state.
+        /// |默认策略。每种Serie都有自己的默认的取颜色策略。比如Line默认是Series策略，Pie默认是Data策略
+        /// </summary>
+        Default,
+        /// <summary>
+        /// assigns the colors in the palette by serie, so that all data in the same series are in the same color;.
+        /// |按照系列分配调色盘中的颜色，同一系列中的所有数据都是用相同的颜色。
+        /// </summary>
+        Serie,
+        /// <summary>
+        /// assigns colors in the palette according to data items, with each data item using a different color..
+        /// |按照数据项分配调色盘中的颜色，每个数据项都使用不同的颜色。
+        /// </summary>
+        Data
+    }
+
     /// <summary>
     /// 系列。
     /// </summary>
@@ -206,6 +229,7 @@ namespace XCharts.Runtime
         [SerializeField] private string m_SerieType = "";
         [SerializeField] private string m_SerieName;
         [SerializeField][Since("v3.2.0")] private SerieState m_State = SerieState.Normal;
+        [SerializeField][Since("v3.2.0")] private SerieColorBy m_ColorBy = SerieColorBy.Default;
         [SerializeField] private string m_Stack;
         [SerializeField] private int m_XAxisIndex = 0;
         [SerializeField] private int m_YAxisIndex = 0;
@@ -339,6 +363,16 @@ namespace XCharts.Runtime
             set { if (PropertyUtil.SetStruct(ref m_State, value)) { SetAllDirty(); } }
         }
         /// <summary>
+        /// The policy to take color from theme.
+        /// |从主题中取色的策略。
+        /// </summary>
+        public SerieColorBy colorBy
+        {
+            //get { return m_ColorBy; }
+            get { return m_ColorBy == SerieColorBy.Default?defaultColorBy : m_ColorBy; }
+            set { if (PropertyUtil.SetStruct(ref m_ColorBy, value)) { SetAllDirty(); } }
+        }
+        /// <summary>
         /// If stack the value. On the same category axis, the series with the same stack name would be put on top of each other.
         /// |数据堆叠，同个类目轴上系列配置相同的stack值后，后一个系列的值会在前一个系列的值上相加。
         /// </summary>
@@ -860,7 +894,10 @@ namespace XCharts.Runtime
         /// 系列中的数据内容数组。SerieData可以设置1到n维数据。
         /// </summary>
         public List<SerieData> data { get { return m_Data; } }
-
+        /// <summary>
+        /// 取色策略是否为按数据项分配。
+        /// </summary>
+        public bool colorByData { get { return colorBy == SerieColorBy.Data; } }
         public override bool vertsDirty
         {
             get
@@ -1703,7 +1740,7 @@ namespace XCharts.Runtime
 
         public bool IsLegendName(string legendName)
         {
-            if (useDataNameForColor)
+            if (colorBy == SerieColorBy.Data)
             {
                 return IsSerieDataLegendName(legendName) || IsSerieLegendName(legendName);
             }