fix(Pie- & DonutChart): improve activeSegment handling & fix focus behavior

packages/charts/src/components/DonutChart/DonutChart.mdx

@@ -43,7 +43,7 @@ import LegendStory from '../../resources/LegendConfig.mdx';
 
 ### With highlighted active segment
 
-<Canvas of={ComponentStories.WithHighlightedActiveSegment} />
+<Canvas of={ComponentStories.WithActiveShape} />
 
 ### Hide labels
 

packages/charts/src/components/DonutChart/DonutChart.stories.tsx

@@ -1,4 +1,5 @@
 import type { Meta, StoryObj } from '@storybook/react';
+import { useEffect, useState } from 'react';
 import { legendConfig, simpleDataSet, simpleDataSetWithSmallValues, tooltipConfig } from '../../resources/DemoProps.js';
 import { DonutChart } from './DonutChart.js';
 
@@ -73,15 +74,6 @@ export const WithFormatter: Story = {
   }
 };
 
-export const WithHighlightedActiveSegment: Story = {
-  args: {
-    chartConfig: {
-      activeSegment: 9,
-      showActiveSegmentDataLabel: true
-    }
-  }
-};
-
 export const HideLabels: Story = {
   args: {
     measure: {
@@ -103,3 +95,27 @@ export const WithCustomTooltipConfig: Story = {
 export const WithCustomLegendConfig: Story = {
   args: legendConfig
 };
+
+export const WithActiveShape: Story = {
+  args: {
+    chartConfig: {
+      activeSegment: 1,
+      showActiveSegmentDataLabel: true
+    }
+  },
+  render(args) {
+    const [activeSegment, setActiveSegment] = useState(args.chartConfig.activeSegment);
+    const handleChartClick = (e) => {
+      const { dataIndex } = e.detail;
+      if (dataIndex != null) {
+        setActiveSegment(dataIndex);
+      }
+    };
+
+    useEffect(() => {
+      setActiveSegment(args.chartConfig.activeSegment);
+    }, [args.chartConfig.activeSegment]);
+
+    return <DonutChart {...args} chartConfig={{ ...args.chartConfig, activeSegment }} onClick={handleChartClick} />;
+  }
+};

packages/charts/src/components/DonutChart/DonutChart.tsx

@@ -17,7 +17,7 @@ const DonutChart = forwardRef<HTMLDivElement, PieChartProps>((props, ref) => {
     ...props.chartConfig
   };
 
-  return <PieChart {...props} ref={ref} chartConfig={chartConfig} />;
+  return <PieChart {...props} ref={ref} chartConfig={chartConfig} data-component-name="DonutChart" />;
 });
 
 DonutChart.displayName = 'DonutChart';

packages/charts/src/components/PieChart/PieChart.module.css

@@ -3,4 +3,11 @@
   path:focus {
     outline: none;
   }
+
+  [data-active-legend] {
+    background: color-mix(in srgb, var(--sapSelectedColor), transparent 87%);
+    :global(.recharts-legend-item-text) {
+      color: var(--sapTextColor) !important;
+    }
+  }
 }

packages/charts/src/components/PieChart/PieChart.stories.tsx

@@ -1,4 +1,5 @@
 import type { Meta, StoryObj } from '@storybook/react';
+import { useEffect, useState } from 'react';
 import { legendConfig, simpleDataSet, simpleDataSetWithSmallValues, tooltipConfig } from '../../resources/DemoProps.js';
 import { PieChart } from './PieChart.js';
 
@@ -51,6 +52,41 @@ export const WithFormatter: Story = {
       activeSegment: 1,
       showActiveSegmentDataLabel: true
     }
+  },
+  render(args) {
+    const [activeSegment, setActiveSegment] = useState(1);
+    const handleChartClick = (e) => {
+      const { dataIndex } = e.detail;
+      if (dataIndex != null) {
+        setActiveSegment(dataIndex);
+      }
+    };
+
+    return <PieChart {...args} chartConfig={{ ...args.chartConfig, activeSegment }} onClick={handleChartClick} />;
+  }
+};
+
+export const WithActiveShape: Story = {
+  args: {
+    chartConfig: {
+      activeSegment: 1,
+      showActiveSegmentDataLabel: true
+    }
+  },
+  render(args) {
+    const [activeSegment, setActiveSegment] = useState(args.chartConfig.activeSegment);
+    const handleChartClick = (e) => {
+      const { dataIndex } = e.detail;
+      if (dataIndex != null) {
+        setActiveSegment(dataIndex);
+      }
+    };
+
+    useEffect(() => {
+      setActiveSegment(args.chartConfig.activeSegment);
+    }, [args.chartConfig.activeSegment]);
+
+    return <PieChart {...args} chartConfig={{ ...args.chartConfig, activeSegment }} onClick={handleChartClick} />;
   }
 };
 

packages/charts/src/components/PieChart/PieChart.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { enrichEventWithDetails, useStylesheet } from '@ui5/webcomponents-react-base';
+import { enrichEventWithDetails, useStylesheet, useSyncRef } from '@ui5/webcomponents-react-base';
 import { clsx } from 'clsx';
 import type { CSSProperties } from 'react';
 import { cloneElement, forwardRef, isValidElement, useCallback, useMemo } from 'react';
@@ -109,6 +109,8 @@ const PieChart = forwardRef<HTMLDivElement, PieChartProps>((props, ref) => {
   } = props;
 
   useStylesheet(styleData, PieChart.displayName);
+  const [componentRef, chartRef] = useSyncRef(ref);
+  const isDonutChart = props['data-component-name'] === 'DonutChart';
 
   const chartConfig: PieChartProps['chartConfig'] = {
     margin: { right: 30, left: 30, bottom: 30, top: 30, ...(props.chartConfig?.margin ?? {}) },
@@ -193,12 +195,23 @@ const PieChart = forwardRef<HTMLDivElement, PieChartProps>((props, ref) => {
       const ex = mx + (cos >= 0 ? 1 : -1) * 22;
       const ey = my;
       const textAnchor = cos >= 0 ? 'start' : 'end';
+      const activeLegendItem = chartRef.current?.querySelector<HTMLLIElement>(
+        `.legend-item-${chartConfig.activeSegment}`
+      );
+      if (!activeLegendItem?.dataset.activeLegend) {
+        const allLegendItems = chartRef.current?.querySelectorAll('.recharts-legend-item');
+
+        allLegendItems.forEach((item) => item.removeAttribute('data-active-legend'));
+        activeLegendItem.setAttribute('data-active-legend', 'true');
+      }
 
       return (
         <g>
-          <text x={cx} y={cy} dy={8} textAnchor="middle" fill={fill}>
-            {payload.name}
-          </text>
+          {isDonutChart && (
+            <text x={cx} y={cy} dy={8} textAnchor="middle" fill={fill}>
+              {payload.name}
+            </text>
+          )}
           <Sector
             cx={cx}
             cy={cy}
@@ -232,7 +245,7 @@ const PieChart = forwardRef<HTMLDivElement, PieChartProps>((props, ref) => {
         </g>
       );
     },
-    [showActiveSegmentDataLabel]
+    [showActiveSegmentDataLabel, chartConfig.activeSegment, isDonutChart]
   );
 
   const renderLabelLine = useCallback(
@@ -249,11 +262,11 @@ const PieChart = forwardRef<HTMLDivElement, PieChartProps>((props, ref) => {
     if (chartConfig.activeSegment != null && showActiveSegmentDataLabel) {
       if (chartConfig.legendPosition === 'bottom') {
         return {
-          paddingTop: '30px'
+          paddingBlockStart: '30px'
         };
       } else if (chartConfig.legendPosition === 'top') {
         return {
-          paddingBottom: '30px'
+          paddingBlockEnd: '30px'
         };
       }
     }
@@ -266,7 +279,7 @@ const PieChart = forwardRef<HTMLDivElement, PieChartProps>((props, ref) => {
   return (
     <ChartContainer
       dataset={dataset}
-      ref={ref}
+      ref={componentRef}
       loading={loading}
       loadingDelay={loadingDelay}
       Placeholder={ChartPlaceholder ?? PieChartPlaceholder}
@@ -301,6 +314,7 @@ const PieChart = forwardRef<HTMLDivElement, PieChartProps>((props, ref) => {
           label={dataLabel}
           activeIndex={chartConfig.activeSegment}
           activeShape={chartConfig.activeSegment != null && renderActiveShape}
+          rootTabIndex={-1}
         >
           {centerLabel && <RechartsLabel position="center">{centerLabel}</RechartsLabel>}
           {dataset &&