增加AxisLine的startExtendLength和endExtendLength设置轴线的延长线

Documentation~/zh/changelog.md

@@ -80,6 +80,7 @@ slug: /changelog
 
 ## master
 
+* (2025.09.01) 增加`AxisLine`的`startExtendLength`和`endExtendLength`设置轴线的延长线
 * (2025.08.27) 修复`Serie`的`TitleStyle`在数据变更时不及时刷新的问题
 * (2025.05.19) 修复`TMP`开启时`Axis`运行报错
 * (2025.04.25) 修复`MarkArea`指定`yValue`或`xValue`时绘制区域不准确的问题

Editor/ChildComponents/LineDrawer.cs

@@ -29,6 +29,8 @@ namespace XCharts.Editor
         {
             base.DrawExtendeds(prop);
             PropertyField(prop, "m_OnZero");
+            PropertyField(prop, "m_StartExtendLength");
+            PropertyField(prop, "m_EndExtendLength");
             PropertyField(prop, "m_ShowArrow");
             PropertyField(prop, "m_Arrow");
         }

Runtime/Component/Axis/AxisHandler.cs

@@ -832,17 +832,19 @@ namespace XCharts
             var lineWidth = axis.axisLine.GetWidth(theme.lineWidth);
             var lineType = axis.axisLine.GetType(theme.lineType);
             var lineColor = axis.axisLine.GetColor(theme.lineColor);
+            var sExtendLength = axis.axisLine.startExtendLength;
+            var eExtendLength = axis.axisLine.endExtendLength;
 
             if (orient == Orient.Horizonal)
             {
-                var left = new Vector3(startX - lineWidth - (inverse ? offset : 0), startY);
+                var left = new Vector3(startX - lineWidth - (inverse ? offset : 0) - sExtendLength, startY);
-                var right = new Vector3(startX + axisLength + lineWidth + (!inverse ? offset : 0), startY);
+                var right = new Vector3(startX + axisLength + lineWidth + (!inverse ? offset : 0) + eExtendLength, startY);
                 ChartDrawer.DrawLineStyle(vh, lineType, lineWidth, left, right, lineColor);
             }
             else
             {
-                var bottom = new Vector3(startX, startY - lineWidth - (inverse ? offset : 0));
+                var bottom = new Vector3(startX, startY - lineWidth - (inverse ? offset : 0) - sExtendLength);
-                var top = new Vector3(startX, startY + axisLength + lineWidth + (!inverse ? offset : 0));
+                var top = new Vector3(startX, startY + axisLength + lineWidth + (!inverse ? offset : 0) + eExtendLength);
                 ChartDrawer.DrawLineStyle(vh, lineType, lineWidth, bottom, top, lineColor);
             }
         }

Runtime/Component/Axis/AxisLine.cs

@@ -10,6 +10,8 @@ namespace XCharts.Runtime
     public class AxisLine : BaseLine
     {
         [SerializeField] private bool m_OnZero;
+        [SerializeField] private float m_StartExtendLength;
+        [SerializeField] private float m_EndExtendLength;
         [SerializeField] private bool m_ShowArrow;
         [SerializeField] private ArrowStyle m_Arrow = new ArrowStyle();
 
@@ -23,6 +25,24 @@ namespace XCharts.Runtime
             set { if (PropertyUtil.SetStruct(ref m_OnZero, value)) SetVerticesDirty(); }
         }
         /// <summary>
+        /// Extend length of the axis line at the start.
+        /// ||轴线起点延长线长度。
+        /// </summary>
+        public float startExtendLength
+        {
+            get { return m_StartExtendLength; }
+            set { if (PropertyUtil.SetStruct(ref m_StartExtendLength, value)) SetVerticesDirty(); }
+        }
+        /// <summary>
+        /// Extend length of the axis line at the end.
+        /// ||轴线终点延长线长度。
+        /// </summary>
+        public float endExtendLength
+        {
+            get { return m_EndExtendLength; }
+            set { if (PropertyUtil.SetStruct(ref m_EndExtendLength, value)) SetVerticesDirty(); }
+        }
+        /// <summary>
         /// Whether to show the arrow symbol of axis.
         /// ||是否显示箭头。
         /// </summary>