增加MarkLine的onTop设置是否显示在最上层

Documentation~/en/configuration.md

@@ -1487,6 +1487,7 @@ Use a line in the chart to illustrate.
 |--|--|--|--|
 |show|true||Whether to display the marking line.
 |serieIndex|0||The serie index of markLine.
+|onTop|true|v3.8.2|whether the markline is on top.
 |animation|||The animation of markline. [AnimationStyle](#animationstyle)|
 |data|||A list of marked data. When the group of data item is 0, each data item represents a line; When the group is not 0, two data items of the same group represent the starting point and the ending point of the line respectively to form a line. In this case, the relevant style parameters of the line are the parameters of the starting point.
 
@@ -1498,6 +1499,8 @@ Use a line in the chart to illustrate.
 
 > XCharts.Runtime.MarkLineData : [ChildComponent](#childcomponent)
 
+> Since `v3.8.2`
+
 Data of marking line.
 
 ```mdx-code-block

Documentation~/zh/changelog.md

@@ -69,6 +69,7 @@ slug: /changelog
 
 ## master
 
+* (2023.11.01) 增加`MarkLine`的`onTop`设置是否显示在最上层
 * (2023.10.21) 修复`Pie`有0数据时`Label`的位置异常的问题
 * (2023.10.21) 增加`Axis`的对数轴支持子刻度
 * (2023.10.19) 修复`Pie`设置玫瑰图时引导线异常的问题

Documentation~/zh/configuration.md

@@ -1487,6 +1487,7 @@ Drawing grid in rectangular coordinate. Line chart, bar chart, and scatter chart
 |--|--|--|--|
 |show|true||是否显示标线。
 |serieIndex|0||标线影响的Serie索引。
+|onTop|true|v3.8.2|是否在最上层。
 |animation|||标线的动画样式。 [AnimationStyle](#animationstyle)|
 |data|||标线的数据列表。当数据项的group为0时，每个数据项表示一条标线；当group不为0时，相同group的两个数据项分别表 示标线的起始点和终止点来组成一条标线，此时标线的相关样式参数取起始点的参数。
 
@@ -1498,6 +1499,8 @@ Drawing grid in rectangular coordinate. Line chart, bar chart, and scatter chart
 
 > XCharts.Runtime.MarkLineData : [ChildComponent](#childcomponent)
 
+> 从 `v3.8.2` 开始支持
+
 图表标线的数据。
 
 ```mdx-code-block

Editor/MainComponents/MarkLineEditor.cs

@@ -11,6 +11,7 @@ namespace XCharts.Editor
         {
             ++EditorGUI.indentLevel;
             PropertyField("m_SerieIndex");
+            PropertyField("m_OnTop");
             PropertyField("m_Animation");
             PropertyListField("m_Data", true);
             --EditorGUI.indentLevel;

Runtime/Component/Mark/MarkLine.cs

@@ -37,6 +37,7 @@ namespace XCharts.Runtime
     {
         [SerializeField] private bool m_Show = true;
         [SerializeField] private int m_SerieIndex = 0;
+        [SerializeField][Since("v3.8.2")] private bool m_OnTop = true;
         [SerializeField] private AnimationStyle m_Animation = new AnimationStyle();
         [SerializeField] private List<MarkLineData> m_Data = new List<MarkLineData>();
 
@@ -59,6 +60,15 @@ namespace XCharts.Runtime
             set { if (PropertyUtil.SetStruct(ref m_SerieIndex, value)) SetVerticesDirty(); }
         }
         /// <summary>
+        /// whether the markline is on top.
+        /// |是否在最上层。
+        /// </summary> 
+        public bool onTop
+        {
+            get { return m_OnTop; }
+            set { if (PropertyUtil.SetStruct(ref m_OnTop, value)) SetVerticesDirty(); }
+        }
+        /// <summary>
         /// The animation of markline.
         /// |标线的动画样式。
         /// </summary>

Runtime/Component/Mark/MarkLineHandler.cs

@@ -19,9 +19,16 @@ namespace XCharts.Runtime
             InitMarkLine(component);
         }
 
+        public override void DrawBase(VertexHelper vh)
+        {
+            if (!component.onTop)
+                DrawMarkLine(vh, component);
+        }
+
         public override void DrawUpper(VertexHelper vh)
         {
-            DrawMarkLine(vh, component);
+            if (component.onTop)
+                DrawMarkLine(vh, component);
         }
 
         public override void Update()