PieChart: Add color changing options to pie chart (#31588)

* Allow changing of series color for PieChart

* Use useTheme hook

* Remove duplicate import

public/app/plugins/panel/piechart/PieChartPanel.tsx

@@ -1,33 +1,46 @@
-import React, { PureComponent } from 'react';
-import { config } from 'app/core/config';
-import { PieChart } from '@grafana/ui';
+import React, { useCallback } from 'react';
+import { PieChart, useTheme } from '@grafana/ui';
 import { PieChartOptions } from './types';
 import { getFieldDisplayValues, PanelProps } from '@grafana/data';
+import { changeSeriesColorConfigFactory } from '../timeseries/overrides/colorSeriesConfigFactory';
 
 interface Props extends PanelProps<PieChartOptions> {}
 
-export class PieChartPanel extends PureComponent<Props> {
-  render() {
-    const { width, height, options, data, replaceVariables, fieldConfig, timeZone } = this.props;
+export const PieChartPanel: React.FC<Props> = ({
+  width,
+  height,
+  options,
+  data,
+  onFieldConfigChange,
+  replaceVariables,
+  fieldConfig,
+  timeZone,
+}) => {
+  const onSeriesColorChange = useCallback(
+    (label: string, color: string) => {
+      onFieldConfigChange(changeSeriesColorConfigFactory(label, color, fieldConfig));
+    },
+    [fieldConfig, onFieldConfigChange]
+  );
 
-    const values = getFieldDisplayValues({
-      fieldConfig,
-      reduceOptions: options.reduceOptions,
-      data: data.series,
-      theme: config.theme,
-      replaceVariables: replaceVariables,
-      timeZone,
-    }).map((v) => v.display);
+  const values = getFieldDisplayValues({
+    fieldConfig,
+    reduceOptions: options.reduceOptions,
+    data: data.series,
+    theme: useTheme(),
+    replaceVariables: replaceVariables,
+    timeZone,
+  }).map((v) => v.display);
 
-    return (
-      <PieChart
-        width={width}
-        height={height}
-        values={values}
-        pieType={options.pieType}
-        displayLabels={options.displayLabels}
-        legendOptions={options.legend}
-      />
-    );
-  }
-}
+  return (
+    <PieChart
+      width={width}
+      height={height}
+      values={values}
+      onSeriesColorChange={onSeriesColorChange}
+      pieType={options.pieType}
+      displayLabels={options.displayLabels}
+      legendOptions={options.legend}
+    />
+  );
+};