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import { IProcessedStyleSet, IPalette } from '@fluentui/react/lib/Styling';
import { classNamesFunction, getId, getRTL } from '@fluentui/react/lib/Utilities';
import { ILegend, Legends } from '../Legends/index';
import { IAccessibilityProps, IChartDataPoint, IChartProps } from './index';
import { IRefArrayData, IStackedBarChartProps, IStackedBarChartStyleProps, IStackedBarChartStyles } from '../../index';
import { Callout, DirectionalHint } from '@fluentui/react/lib/Callout';
import { FocusZone, FocusZoneDirection } from '@fluentui/react-focus';
import { ChartHoverCard, getAccessibleDataObject } from '../../utilities/index';
import { FocusableTooltipText } from '../../utilities/FocusableTooltipText';
import { convertToLocaleString } from '../../utilities/locale-util';
const getClassNames = classNamesFunction<IStackedBarChartStyleProps, IStackedBarChartStyles>();
export interface IStackedBarChartState {
isCalloutVisible: boolean;
selectedLegend: string;
activeLegend: string;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
refSelected: any;
dataForHoverCard: number;
color: string;
xCalloutValue?: string;
yCalloutValue?: string;
dataPointCalloutProps?: IChartDataPoint;
callOutAccessibilityData?: IAccessibilityProps;
calloutLegend: string;
barSpacingInPercent: number;
}
export class StackedBarChartBase extends React.Component<IStackedBarChartProps, IStackedBarChartState> {
public static defaultProps: Partial<IStackedBarChartProps> = {
barHeight: 12,
hideNumberDisplay: false,
hideLegend: false,
ignoreFixStyle: false,
};
private _classNames: IProcessedStyleSet<IStackedBarChartStyles>;
private _calloutId: string;
private _refArray: IRefArrayData[];
private _calloutAnchorPoint: IChartDataPoint | null;
private _emptyChartId: string;
private barChartSvgRef: React.RefObject<SVGSVGElement>;
private _isRTL = getRTL();
public constructor(props: IStackedBarChartProps) {
super(props);
this.state = {
isCalloutVisible: false,
selectedLegend: '',
activeLegend: '',
refSelected: null,
dataForHoverCard: 0,
color: '',
xCalloutValue: '',
yCalloutValue: '',
calloutLegend: '',
barSpacingInPercent: 0,
};
this._refArray = [];
this._onLeave = this._onLeave.bind(this);
this._refCallback = this._refCallback.bind(this);
this._onBarLeave = this._onBarLeave.bind(this);
this._calloutId = getId('callout');
this._emptyChartId = getId('_SBC_empty');
this.barChartSvgRef = React.createRef<SVGSVGElement>();
}
public componentDidMount(): void {
const svgWidth = this.barChartSvgRef.current?.getBoundingClientRect().width || 0;
const MARGIN_WIDTH_IN_PX = 3;
Iif (svgWidth) {
const currentBarSpacing = (MARGIN_WIDTH_IN_PX / svgWidth) * 100;
this.setState({ barSpacingInPercent: currentBarSpacing });
}
}
public render(): JSX.Element {
if (!this._isChartEmpty()) {
this._adjustProps();
const { data, benchmarkData, targetData, hideNumberDisplay, ignoreFixStyle, culture } = this.props;
const { palette } = this.props.theme!;
const barHeight = ignoreFixStyle || data!.chartData!.length > 2 ? this.props.barHeight : 12;
if (benchmarkData) {
// benchmark color is used to render color for benchmark triangle and benchmark legend
benchmarkData.color = benchmarkData.color || palette.neutralTertiary;
}
if (targetData) {
// target color is used to render color for target triangle and target legend
targetData.color = targetData.color || palette.neutralSecondary;
}
const bars = this._createBarsAndLegends(data!, barHeight!, palette, benchmarkData, targetData);
const showRatio = hideNumberDisplay === false && !ignoreFixStyle && data!.chartData!.length === 2;
const showNumber = hideNumberDisplay === false && !ignoreFixStyle && data!.chartData!.length === 1;
const total = data!.chartData!.reduce(
(acc: number, value: IChartDataPoint) => acc + (value.data ? value.data : 0),
0,
);
let benchmarkRatio = 0;
if (benchmarkData && total) {
benchmarkRatio = (benchmarkData.data! / total) * 100;
}
let targetRatio = 0;
if (targetData && total) {
targetRatio = (targetData.data! / total) * 100;
}
const showLegend = this.props.hideLegend === false && (ignoreFixStyle || data!.chartData!.length > 2);
this._classNames = getClassNames(this.props.styles!, {
legendColor: this.state.color,
theme: this.props.theme!,
benchmarkColor: benchmarkData ? benchmarkData.color : '',
benchmarkRatio,
targetColor: targetData ? targetData.color : '',
targetRatio,
showTriangle: !!(benchmarkData || targetData),
});
const getChartData = () =>
convertToLocaleString(data!.chartData![0].data ? data!.chartData![0].data : 0, culture);
return (
<div className={this._classNames.root} onMouseLeave={this._handleChartMouseLeave}>
<FocusZone direction={FocusZoneDirection.horizontal}>
<div className={this._classNames.chartTitle}>
{data!.chartTitle && (
<FocusableTooltipText
className={this._classNames.chartTitleLeft}
content={data!.chartTitle}
accessibilityData={data!.chartTitleAccessibilityData}
/>
)}
{showRatio && (
<div {...getAccessibleDataObject(data!.chartDataAccessibilityData, 'text', false)}>
<span className={this._classNames.ratioNumerator}>{getChartData()}</span>
{!this.props.hideDenominator && (
<span className={this._classNames.ratioDenominator}>
{' / ' + convertToLocaleString(total, culture)}
</span>
)}
</div>
)}
{showNumber && (
<div
className={this._classNames.ratioNumerator}
{...getAccessibleDataObject(data!.chartDataAccessibilityData, 'text', false)}
>
{getChartData()}
</div>
)}
</div>
{(benchmarkData || targetData) && (
<div className={this._classNames.benchmarkContainer}>
{benchmarkData && <div className={this._classNames.benchmark} role="text" />}
{targetData && <div className={this._classNames.target} role="text" />}
</div>
)}
</FocusZone>
<FocusZone direction={FocusZoneDirection.horizontal}>
<div>
<svg ref={this.barChartSvgRef} className={this._classNames.chart} aria-label={data?.chartTitle}>
<g>{bars[0]}</g>
<Callout
gapSpace={15}
isBeakVisible={false}
target={this.state.refSelected}
setInitialFocus={true}
hidden={!(!this.props.hideTooltip && this.state.isCalloutVisible)}
directionalHint={DirectionalHint.topAutoEdge}
id={this._calloutId}
onDismiss={this._closeCallout}
preventDismissOnLostFocus={true}
/** Keep the callout updated with details of focused/hovered bar */
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.calloutLegend}
YValue={this.state.yCalloutValue ? this.state.yCalloutValue : this.state.dataForHoverCard}
color={this.state.color}
culture={culture}
/>
)}
</>
</Callout>
</svg>
</div>
</FocusZone>
{showLegend && <div className={this._classNames.legendContainer}>{bars[1]}</div>}
</div>
);
}
return (
<div
id={this._emptyChartId}
role={'alert'}
style={{ opacity: '0' }}
aria-label={'Graph has no data to display'}
/>
);
}
private _adjustProps(): void {
this._classNames = getClassNames(this.props.styles!, {
legendColor: this.state.color,
theme: this.props.theme!,
width: this.props.width!,
barHeight: this.props.barHeight!,
className: this.props.className!,
});
}
/**
* The Create bar functions returns an array of <rect> elements, which form the bars
* For each bar an x value, and a width needs to be specified
* The computations are done based on percentages
* Extra margin is also provided, in the x value to provide some spacing
*/
private _createBarsAndLegends(
data: IChartProps,
barHeight: number,
palette: IPalette,
benchmarkData?: IChartDataPoint,
targetData?: IChartDataPoint,
): [JSX.Element[], JSX.Element] {
const noOfBars =
data.chartData?.reduce((count: number, point: IChartDataPoint) => (count += (point.data || 0) > 0 ? 1 : 0), 0) ||
1;
const totalMarginPercent = this.state.barSpacingInPercent * (noOfBars - 1);
const defaultPalette: string[] = [palette.blueLight, palette.blue, palette.blueMid, palette.red, palette.black];
const legendDataItems: ILegend[] = [];
// calculating starting point of each bar and it's range
const startingPoint: number[] = [];
const total = data.chartData!.reduce(
(acc: number, point: IChartDataPoint) => acc + (point.data ? point.data : 0),
0,
);
let prevPosition = 0;
let value = 0;
let sumOfPercent = 0;
data.chartData!.map((point: IChartDataPoint, index: number) => {
const pointData = point.data ? point.data : 0;
value = (pointData / total) * 100;
if (value < 1 && value !== 0) {
value = 1;
} else if (value > 99 && value !== 100) {
value = 99;
}
sumOfPercent += value;
return sumOfPercent;
});
/**
* The %age of the space occupied by the margin needs to subtracted
* while computing the scaling ratio, since the margins are not being
* scaled down, only the data is being scaled down from a higher percentage to lower percentage
* Eg: 95% of the space is taken by the bars, 5% by the margins
* Now if the sumOfPercent is 120% -> This needs to be scaled down to 95%, not 100%
* since that's only space available to the bars
*/
const scalingRatio = sumOfPercent !== 0 ? sumOfPercent / (100 - totalMarginPercent) : 1;
const bars = data.chartData!.map((point: IChartDataPoint, index: number) => {
const color: string = point.color ? point.color : defaultPalette[Math.floor(Math.random() * 4 + 1)];
const pointData = point.data ? point.data : 0;
// mapping data to the format Legends component needs
const legend: ILegend = {
title: point.legend!,
color: color,
action:
total > 0
? () => {
this._onClick(point.legend!);
}
: undefined,
hoverAction:
total > 0
? () => {
this._handleChartMouseLeave();
this._onHover(point.legend!);
}
: undefined,
onMouseOutAction:
total > 0
? () => {
this._onLeave();
}
: undefined,
};
if (!point.placeHolder) {
legendDataItems.push(legend);
}
if (index > 0) {
prevPosition += value;
}
value = (pointData / total) * 100;
if (value < 1 && value !== 0) {
value = 1 / scalingRatio;
} else if (value > 99 && value !== 100) {
value = 99 / scalingRatio;
} else {
value = value / scalingRatio;
}
startingPoint.push(prevPosition);
const styles = this.props.styles;
const shouldHighlight = this._legendHighlighted(point.legend!) || this._noLegendHighlighted() ? true : false;
this._classNames = getClassNames(styles!, {
theme: this.props.theme!,
shouldHighlight: shouldHighlight,
href: this.props.href!,
});
return (
<g
key={index}
className={this._classNames.opacityChangeOnHover}
ref={(e: SVGGElement) => {
this._refCallback(e, legend.title);
}}
data-is-focusable={!this.props.hideTooltip && shouldHighlight}
onFocus={this._onBarFocus.bind(this, pointData, color, point)}
onBlur={this._onBarLeave}
aria-label={this._getAriaLabel(point)}
role="img"
onMouseOver={this._onBarHover.bind(this, pointData, color, point)}
onMouseMove={this._onBarHover.bind(this, pointData, color, point)}
onMouseLeave={this._onBarLeave}
pointerEvents="all"
onClick={this.props.href ? this._redirectToUrl.bind(this, this.props.href!) : point.onClick}
>
<rect
key={index}
id={getId('_SBC_bar')}
x={`${
this._isRTL
? 100 - startingPoint[index] - value - this.state.barSpacingInPercent * index
: startingPoint[index] + this.state.barSpacingInPercent * index
}%`}
y={0}
width={value + '%'}
height={barHeight}
fill={color}
/>
</g>
);
});
// add benchmark legends
this._addLegend(legendDataItems, benchmarkData);
this._addLegend(legendDataItems, targetData);
const legends = (
<Legends
legends={legendDataItems}
enabledWrapLines={this.props.enabledLegendsWrapLines}
overflowProps={this.props.legendsOverflowProps}
focusZonePropsInHoverCard={this.props.focusZonePropsForLegendsInHoverCard}
overflowText={this.props.legendsOverflowText}
{...this.props.legendProps}
/>
);
return [
total === 0
? [
this._generateEmptyBar(
barHeight,
this.props.barBackgroundColor ? this.props.barBackgroundColor : palette.neutralLight,
),
]
: bars,
legends,
];
}
private _onBarFocus(pointData: number, color: string, point: IChartDataPoint): void {
this._refArray.forEach((obj: IRefArrayData) => {
Iif (obj.index === point.legend!) {
this.setState({
refSelected: obj.refElement,
/** Show the callout if highlighted bar is focused and Hide it if unhighlighted bar is focused */
isCalloutVisible: this.state.selectedLegend === '' || this.state.selectedLegend === point.legend!,
calloutLegend: point.legend!,
dataForHoverCard: pointData,
color: color,
xCalloutValue: point.xAxisCalloutData!,
yCalloutValue: point.yAxisCalloutData!,
dataPointCalloutProps: point,
callOutAccessibilityData: point.callOutAccessibilityData!,
});
}
});
}
private _addLegend(legendDataItems: ILegend[], data?: IChartDataPoint): void {
if (data) {
const legend: ILegend = {
title: data.legend!,
color: data.color!,
shape: 'triangle',
};
legendDataItems.push(legend);
}
}
private _generateEmptyBar(barHeight: number, color: string): JSX.Element {
return (
<g key={0} className={this._classNames.opacityChangeOnHover}>
<rect key={0} id={getId('_SBC_empty_bar_')} x={'0%'} y={0} width={'100%'} height={barHeight} fill={color} />
</g>
);
}
private _refCallback(element: SVGGElement, legendTitle: string): void {
this._refArray.push({ index: legendTitle, refElement: element });
}
private _onClick(legendTitle: string): void {
Iif (this.state.selectedLegend === legendTitle) {
this.setState({
selectedLegend: '',
});
} else {
this.setState({
selectedLegend: legendTitle,
});
}
}
private _onHover(legendTitle: string): void {
this.setState({
activeLegend: legendTitle,
});
}
private _onLeave(): void {
this.setState({
activeLegend: '',
});
}
private _onBarHover(
pointData: number,
color: string,
point: IChartDataPoint,
mouseEvent: React.MouseEvent<SVGPathElement>,
): void {
mouseEvent.persist();
if (this._calloutAnchorPoint !== point) {
this._calloutAnchorPoint = point;
this.setState({
refSelected: mouseEvent,
/** Show the callout if highlighted bar is hovered and Hide it if unhighlighted bar is hovered */
isCalloutVisible: this.state.selectedLegend === '' || this.state.selectedLegend === point.legend!,
calloutLegend: point.legend!,
dataForHoverCard: pointData,
color: color,
xCalloutValue: point.xAxisCalloutData!,
yCalloutValue: point.yAxisCalloutData!,
dataPointCalloutProps: point,
callOutAccessibilityData: point.callOutAccessibilityData!,
});
}
}
private _onBarLeave(): void {
/**/
}
private _handleChartMouseLeave = () => {
this._calloutAnchorPoint = null;
this.setState({
isCalloutVisible: false,
});
};
private _redirectToUrl(href: string | undefined): void {
href ? (window.location.href = href) : '';
}
private _closeCallout = () => {
this.setState({
isCalloutVisible: false,
});
};
/**
* This function checks if the given legend is highlighted or not.
* A legend can be highlighted in 2 ways:
* 1. selection: if the user clicks on it
* 2. hovering: if there is no selected legend and the user hovers over it
*/
private _legendHighlighted = (legendTitle: string) => {
return (
this.state.selectedLegend === legendTitle ||
(this.state.selectedLegend === '' && this.state.activeLegend === legendTitle)
);
};
/**
* This function checks if none of the legends is selected or hovered.
*/
private _noLegendHighlighted = () => {
return this.state.selectedLegend === '' && this.state.activeLegend === '';
};
private _getAriaLabel = (point: IChartDataPoint): string => {
const legend = point.xAxisCalloutData || point.legend;
const yValue = point.yAxisCalloutData || point.data || 0;
return point.callOutAccessibilityData?.ariaLabel || (legend ? `${legend}, ` : '') + `${yValue}.`;
};
private _isChartEmpty(): boolean {
return !(this.props.data && this.props.data.chartData && this.props.data.chartData.length > 0);
}
}
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