Feature - Radar Chart - Need to show custom tooltip only for actual index

src/chart/radar/RadarSeries.ts

@@ -71,6 +71,10 @@ export interface RadarSeriesOption
 
     data?: (RadarSeriesDataItemOption | RadarSeriesDataValue)[]
 }
+export interface RadarCallbackDataParams extends CallbackDataParams {
+    indicatorIndex: number,
+    indicatorName:string
+}
 
 class RadarSeriesModel extends SeriesModel<RadarSeriesOption> {
 
@@ -102,6 +106,21 @@ class RadarSeriesModel extends SeriesModel<RadarSeriesOption> {
         });
     }
 
+    /**
+     * @overwrite
+     */
+    getDataParams(dataIndex: number, dataType: any, el?: Element): RadarCallbackDataParams {
+        const params = super.getDataParams(dataIndex) as RadarCallbackDataParams;
+        // indicatorIndex && indicatorName
+        const indicatorIndex = (el && (el as any).__dimIdx) !== undefined ? (el as any).__dimIdx : null;
+        if (indicatorIndex != null) {
+            const indicatorAxis = this.coordinateSystem.getIndicatorAxes()[indicatorIndex];
+            params.indicatorIndex = indicatorIndex;
+            params.indicatorName = indicatorAxis.name;
+        }
+        return params;
+    }
+
     formatTooltip(
         dataIndex: number,
         multipleSeries?: boolean,

src/component/tooltip/TooltipView.ts

@@ -673,8 +673,8 @@ class TooltipView extends ComponentView {
         if (tooltipTrigger != null && tooltipTrigger !== 'item') {
             return;
         }
-
-        const params = dataModel.getDataParams(dataIndex, dataType);
+        const el = e.target;
+        const params = dataModel.getDataParams(dataIndex, dataType, el);
         const markupStyleCreator = new TooltipMarkupStyleCreator();
         // Pre-create marker style for makers. Users can assemble richText
         // text in `formatter` callback and use those markers style.