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import { classNamesFunction, getId } from '@fluentui/react/lib/Utilities';
import { ScaleOrdinal } from 'd3-scale';
import { IProcessedStyleSet } from '@fluentui/react/lib/Styling';
import { Callout, DirectionalHint } from '@fluentui/react/lib/Callout';
import { FocusZone, FocusZoneDirection, FocusZoneTabbableElements } from '@fluentui/react-focus';
import { IAccessibilityProps, ChartHoverCard, ILegend, Legends } from '../../index';
import { Pie } from './Pie/index';
import { IChartDataPoint, IDonutChartProps, IDonutChartStyleProps, IDonutChartStyles } from './index';
import { getAccessibleDataObject, getColorFromToken, getNextColor } from '../../utilities/index';
import { convertToLocaleString } from '../../utilities/locale-util';
const getClassNames = classNamesFunction<IDonutChartStyleProps, IDonutChartStyles>();
const LEGEND_CONTAINER_HEIGHT = 40;
export interface IDonutChartState {
showHover?: boolean;
value?: string | undefined;
legend?: string | undefined;
_width?: number | undefined;
_height?: number | undefined;
activeLegend?: string;
color?: string | undefined;
xCalloutValue?: string;
yCalloutValue?: string;
focusedArcId?: string;
selectedLegend: string;
dataPointCalloutProps?: IChartDataPoint;
callOutAccessibilityData?: IAccessibilityProps;
}
export class DonutChartBase extends React.Component<IDonutChartProps, IDonutChartState> {
public static defaultProps: Partial<IDonutChartProps> = {
innerRadius: 0,
hideLabels: true,
};
public _colors: ScaleOrdinal<string, {}>;
private _classNames: IProcessedStyleSet<IDonutChartStyles>;
private _rootElem: HTMLElement | null;
private _uniqText: string;
/* eslint-disable @typescript-eslint/no-explicit-any */
private _currentHoverElement: any;
private _calloutId: string;
private _calloutAnchorPoint: IChartDataPoint | null;
private _emptyChartId: string | null;
public static getDerivedStateFromProps(
nextProps: Readonly<IDonutChartProps>,
prevState: Readonly<IDonutChartState>,
): Partial<IDonutChartState> | null {
let widthState: { _width: number } | undefined;
Iif (nextProps.width && nextProps.width !== prevState._width) {
widthState = { _width: nextProps.width };
}
let heightState: { _height: number } | undefined;
Iif (nextProps.height && nextProps.height !== prevState._height) {
heightState = { _height: nextProps.height - LEGEND_CONTAINER_HEIGHT };
}
return { ...widthState, ...heightState };
}
constructor(props: IDonutChartProps) {
super(props);
this.state = {
showHover: false,
value: '',
legend: '',
_width: this.props.width || 200,
_height: this.props.height || 200,
activeLegend: '',
color: '',
xCalloutValue: '',
yCalloutValue: '',
selectedLegend: '',
focusedArcId: '',
};
this._hoverCallback = this._hoverCallback.bind(this);
this._focusCallback = this._focusCallback.bind(this);
this._hoverLeave = this._hoverLeave.bind(this);
this._calloutId = getId('callout');
this._uniqText = getId('_Pie_');
this._emptyChartId = getId('_DonutChart_empty');
}
public componentDidMount(): void {
if (this._rootElem) {
this.setState({
_width: this._rootElem.offsetWidth,
_height: this._rootElem.offsetHeight - LEGEND_CONTAINER_HEIGHT,
});
}
}
public render(): JSX.Element {
const { data, hideLegend = false } = this.props;
const points = this._addDefaultColors(data?.chartData);
this._classNames = getClassNames(this.props.styles!, {
theme: this.props.theme!,
width: this.state._width!,
height: this.state._height!,
color: this.state.color!,
className: this.props.className!,
});
const legendBars = this._createLegends(points);
const donutMarginHorizontal = this.props.hideLabels ? 0 : 80;
const donutMarginVertical = this.props.hideLabels ? 0 : 40;
const outerRadius =
Math.min(this.state._width! - donutMarginHorizontal, this.state._height! - donutMarginVertical) / 2;
const chartData = this._elevateToMinimums(points.filter((d: IChartDataPoint) => d.data! >= 0));
const valueInsideDonut = this._valueInsideDonut(this.props.valueInsideDonut!, chartData!);
return !this._isChartEmpty() ? (
<div
className={this._classNames.root}
ref={(rootElem: HTMLElement | null) => (this._rootElem = rootElem)}
onMouseLeave={this._handleChartMouseLeave}
>
<FocusZone direction={FocusZoneDirection.horizontal} handleTabKey={FocusZoneTabbableElements.all}>
<div>
<svg
className={this._classNames.chart}
aria-label={data?.chartTitle}
ref={(node: SVGElement | null) => this._setViewBox(node)}
>
<Pie
width={this.state._width!}
height={this.state._height!}
outerRadius={outerRadius}
innerRadius={this.props.innerRadius!}
data={chartData!}
onFocusCallback={this._focusCallback}
hoverOnCallback={this._hoverCallback}
hoverLeaveCallback={this._hoverLeave}
uniqText={this._uniqText}
onBlurCallback={this._onBlur}
activeArc={this._getHighlightedLegend()}
focusedArcId={this.state.focusedArcId || ''}
href={this.props.href!}
calloutId={this._calloutId}
valueInsideDonut={this._toLocaleString(valueInsideDonut)}
theme={this.props.theme!}
showLabelsInPercent={this.props.showLabelsInPercent}
hideLabels={this.props.hideLabels}
/>
</svg>
</div>
</FocusZone>
<Callout
target={this._currentHoverElement}
alignTargetEdge={true}
isBeakVisible={false}
directionalHint={DirectionalHint.topAutoEdge}
gapSpace={15}
hidden={!(!this.props.hideTooltip && this.state.showHover)}
id={this._calloutId}
onDismiss={this._closeCallout}
preventDismissOnLostFocus={true}
/** Keep the callout updated with details of focused/hovered arc */
shouldUpdateWhenHidden={true}
{...this.props.calloutProps!}
{...getAccessibleDataObject(this.state.callOutAccessibilityData, 'text', false)}
>
{this.props.onRenderCalloutPerDataPoint ? (
this.props.onRenderCalloutPerDataPoint(this.state.dataPointCalloutProps!)
) : (
<ChartHoverCard
Legend={this.state.xCalloutValue ? this.state.xCalloutValue : this.state.legend}
YValue={this.state.yCalloutValue ? this.state.yCalloutValue : this.state.value}
color={this.state.color}
culture={this.props.culture}
/>
)}
</Callout>
{!hideLegend && <div className={this._classNames.legendContainer}>{legendBars}</div>}
</div>
) : (
<div
id={this._emptyChartId!}
role={'alert'}
style={{ opacity: '0' }}
aria-label={'Graph has no data to display'}
/>
);
}
private _closeCallout = () => {
this.setState({
showHover: false,
});
};
private _elevateToMinimums(data: IChartDataPoint[]) {
let sumOfData = 0;
const minPercent = 0.01;
const elevatedData: IChartDataPoint[] = [];
data.forEach(item => {
sumOfData += item.data!;
});
data.forEach(item => {
elevatedData.push(
minPercent * sumOfData > item.data! && item.data! > 0
? {
...item,
data: minPercent * sumOfData,
yAxisCalloutData:
item.yAxisCalloutData === undefined ? item.data!.toLocaleString() : item.yAxisCalloutData,
}
: item,
);
});
return elevatedData;
}
private _setViewBox(node: SVGElement | null): void {
if (node === null) {
return;
}
const widthVal = node.parentElement ? node.parentElement.clientWidth : this.state._width;
const heightVal =
node.parentElement && node.parentElement?.offsetHeight > this.state._height!
? node.parentElement?.offsetHeight
: this.state._height;
const viewbox = `0 0 ${widthVal!} ${heightVal!}`;
node.setAttribute('viewBox', viewbox);
}
private _createLegends(chartData: IChartDataPoint[]): JSX.Element {
const legendDataItems = chartData.map((point: IChartDataPoint, index: number) => {
const color: string = point.color!;
// mapping data to the format Legends component needs
const legend: ILegend = {
title: point.legend!,
color,
action: () => {
if (this.state.selectedLegend === point.legend) {
this.setState({ selectedLegend: '' });
} else {
this.setState({ selectedLegend: point.legend! });
}
},
hoverAction: () => {
this._handleChartMouseLeave();
this.setState({ activeLegend: point.legend! });
},
onMouseOutAction: () => {
this.setState({ activeLegend: '' });
},
};
return legend;
});
const legends = (
<Legends
legends={legendDataItems}
centerLegends
overflowProps={this.props.legendsOverflowProps}
focusZonePropsInHoverCard={this.props.focusZonePropsForLegendsInHoverCard}
overflowText={this.props.legendsOverflowText}
{...this.props.legendProps}
/>
);
return legends;
}
private _focusCallback = (data: IChartDataPoint, id: string, element: SVGPathElement): void => {
this._currentHoverElement = element;
this.setState({
/** Show the callout if highlighted arc is focused and Hide it if unhighlighted arc is focused */
showHover: this.state.selectedLegend === '' || this.state.selectedLegend === data.legend,
value: data.data!.toString(),
legend: data.legend,
color: data.color!,
xCalloutValue: data.xAxisCalloutData!,
yCalloutValue: data.yAxisCalloutData!,
focusedArcId: id,
dataPointCalloutProps: data,
callOutAccessibilityData: data.callOutAccessibilityData!,
});
};
private _hoverCallback = (data: IChartDataPoint, e: React.MouseEvent<SVGPathElement>): void => {
if (this._calloutAnchorPoint !== data) {
this._calloutAnchorPoint = data;
this._currentHoverElement = e;
this.setState({
/** Show the callout if highlighted arc is hovered and Hide it if unhighlighted arc is hovered */
showHover: this.state.selectedLegend === '' || this.state.selectedLegend === data.legend,
value: data.data!.toString(),
legend: data.legend,
color: data.color!,
xCalloutValue: data.xAxisCalloutData!,
yCalloutValue: data.yAxisCalloutData!,
dataPointCalloutProps: data,
callOutAccessibilityData: data.callOutAccessibilityData!,
});
}
};
private _onBlur = (): void => {
this.setState({ focusedArcId: '' });
};
private _hoverLeave(): void {
/**/
}
private _handleChartMouseLeave = () => {
this._calloutAnchorPoint = null;
this.setState({ showHover: false });
};
private _valueInsideDonut(valueInsideDonut: string | number | undefined, data: IChartDataPoint[]) {
const highlightedLegend = this._getHighlightedLegend();
if (valueInsideDonut !== undefined && (highlightedLegend !== '' || this.state.showHover)) {
let legendValue = valueInsideDonut;
data!.map((point: IChartDataPoint, index: number) => {
if (point.legend === highlightedLegend || (this.state.showHover && point.legend === this.state.legend)) {
legendValue = point.yAxisCalloutData ? point.yAxisCalloutData : point.data!;
}
return;
});
return legendValue;
} else {
return valueInsideDonut;
}
}
private _toLocaleString(data: string | number | undefined) {
const localeString = convertToLocaleString(data, this.props.culture);
if (!localeString) {
return data;
}
return localeString?.toString();
}
/**
* This function returns
* the selected legend if there is one
* or the hovered legend if none of the legends is selected.
* Note: This won't work in case of multiple legends selection.
*/
private _getHighlightedLegend() {
return this.state.selectedLegend || this.state.activeLegend;
}
private _isChartEmpty(): boolean {
return !(
this.props.data &&
this.props.data.chartData &&
this.props.data.chartData!.filter((d: IChartDataPoint) => d.data! > 0).length > 0
);
}
private _addDefaultColors = (donutChartDataPoint?: IChartDataPoint[]): IChartDataPoint[] => {
return donutChartDataPoint
? donutChartDataPoint.map((item, index) => {
let color: string;
// isInverted property is applicable to v8 themes only
if (typeof item.color === 'undefined') {
color = getNextColor(index, 0, this.props.theme?.isInverted);
} else {
color = getColorFromToken(item.color, this.props.theme?.isInverted);
}
return { ...item, color };
})
: [];
};
}
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