修复Tooltip的Cross在开启DataZoom时指示位置不准确的问题

Documentation~/zh/changelog.md

@@ -73,6 +73,7 @@ slug: /changelog
 
 ## master
 
+* (2024.06.09) 修复`Tooltip`的`Cross`在`Axis`是类目轴并且开启`DataZoom`的情况下指示位置不准确的问题
 * (2024.06.06) 修复`Serie`在`Clone`时动画异常问题 (#320)
 * (2024.06.04) 修复`Serie`的`state`在代码动态设置时不刷新的问题
 * (2024.05.29) 调整`XCharts`在`Hierarchy`视图下的右键菜单到`UI/XCharts`下

Runtime/Component/Axis/Axis.cs

@@ -935,5 +935,43 @@ namespace XCharts.Runtime
                     (float)(Math.Abs(context.minValue) * (axisLength / (Math.Abs(context.minValue) + Math.Abs(context.maxValue))))
                 );
         }
+
+        public Vector3 GetCategoryPosition(int categoryIndex, int dataCount = 0)
+        {
+            if (dataCount <= 0)
+            {
+                dataCount = data.Count;
+            }
+            if (IsCategory() && dataCount > 0)
+            {
+                Vector3 pos;
+                if (boundaryGap)
+                {
+                    var each = context.length / dataCount;
+                    pos = context.start + context.dire * (each * (categoryIndex + 0.5f));
+                }
+                else
+                {
+                    var each = context.length / (dataCount - 1);
+                    pos = context.start + context.dire * (each * categoryIndex);
+                }
+                if (axisLabel.distance != 0)
+                {
+                    if (this is YAxis)
+                    {
+                        pos.x = GetLabelObjectPosition(0).x;
+                    }
+                    else
+                    {
+                        pos.y = GetLabelObjectPosition(0).y;
+                    }
+                }
+                return pos;
+            }
+            else
+            {
+                return Vector3.zero;
+            }
+        }
     }
 }

Runtime/Component/Axis/AxisHandler.cs

@@ -58,7 +58,7 @@ namespace XCharts
                                 (!axis.boundaryGap && (local.y > pY - splitWid / 2 && local.y <= pY + splitWid / 2)))
                             {
                                 axis.context.pointerValue = j;
-                                axis.context.pointerLabelPosition = axis.GetLabelObjectPosition(j);
+                                axis.context.pointerLabelPosition = axis.GetCategoryPosition(j, dataCount);
                                 if (j != lastPointerValue)
                                 {
                                     if (chart.onAxisPointerValueChanged != null)
@@ -78,7 +78,7 @@ namespace XCharts
                                 (!axis.boundaryGap && (local.x > pX - splitWid / 2 && local.x <= pX + splitWid / 2)))
                             {
                                 axis.context.pointerValue = j;
-                                axis.context.pointerLabelPosition = axis.GetLabelObjectPosition(j);
+                                axis.context.pointerLabelPosition = axis.GetCategoryPosition(j, dataCount);
                                 if (j != lastPointerValue)
                                 {
                                     if (chart.onAxisPointerValueChanged != null)

Runtime/Component/Tooltip/TooltipHandler.cs

@@ -701,7 +701,7 @@ namespace XCharts.Runtime
                         case Tooltip.Type.Line:
                             float pX = grid.context.x;
                             pX += xAxis.IsCategory() ?
-                                (float)(xAxis.context.axisTooltipValue * splitWidth + (xAxis.boundaryGap ? splitWidth / 2 : 0)) :
+                                (float)(xAxis.context.pointerValue * splitWidth + (xAxis.boundaryGap ? splitWidth / 2 : 0)) :
                                 xAxis.GetDistance(xAxis.context.axisTooltipValue, grid.context.width);
                             if (pX < grid.context.x)
                                 break;