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import { classNamesFunction, getId, getRTL } from '@fluentui/react/lib/Utilities';
import { IProcessedStyleSet, IPalette } from '@fluentui/react/lib/Styling';
import { ILegend, Legends } from '../Legends/index';
import {
IAccessibilityProps,
IChartDataPoint,
IChartProps,
IMultiStackedBarChartProps,
IMultiStackedBarChartStyles,
IMultiStackedBarChartStyleProps,
MultiStackedBarChartVariant,
} from './index';
import { Callout, DirectionalHint } from '@fluentui/react/lib/Callout';
import { FocusZone, FocusZoneDirection } from '@fluentui/react-focus';
import { convertToLocaleString } from '../../utilities/locale-util';
import { ChartHoverCard, formatValueWithSIPrefix, getAccessibleDataObject } from '../../utilities/index';
import { FocusableTooltipText } from '../../utilities/FocusableTooltipText';
const getClassNames = classNamesFunction<IMultiStackedBarChartStyleProps, IMultiStackedBarChartStyles>();
export interface IRefArrayData {
legendText?: string;
refElement?: SVGGElement;
}
export interface IMultiStackedBarChartState {
isCalloutVisible: boolean;
refArray: IRefArrayData[];
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 MultiStackedBarChartBase extends React.Component<IMultiStackedBarChartProps, IMultiStackedBarChartState> {
public static defaultProps: Partial<IMultiStackedBarChartProps> = {
barHeight: 12,
hideRatio: [],
hideDenominator: [],
};
private _classNames: IProcessedStyleSet<IMultiStackedBarChartStyles>;
private _calloutId: string;
private _calloutAnchorPoint: IChartDataPoint | null;
private _longestBarTotalValue: number;
private _isRTL: boolean = getRTL();
private barChartSvgRef: React.RefObject<SVGSVGElement>;
private _emptyChartId: string;
private _barId: string;
private _barIdPlaceholderPartToWhole: string;
private _barIdEmpty: string;
public constructor(props: IMultiStackedBarChartProps) {
super(props);
this.state = {
isCalloutVisible: false,
refArray: [],
selectedLegend: '',
activeLegend: '',
refSelected: null,
dataForHoverCard: 0,
color: '',
xCalloutValue: '',
yCalloutValue: '',
calloutLegend: '',
barSpacingInPercent: 0,
};
this._onLeave = this._onLeave.bind(this);
this._onBarLeave = this._onBarLeave.bind(this);
this._calloutId = getId('callout');
this.barChartSvgRef = React.createRef<SVGSVGElement>();
this._emptyChartId = getId('_MSBC_empty');
this._barId = getId('_MSBC_rect_');
this._barIdPlaceholderPartToWhole = getId('_MSBC_rect_partToWhole_');
this._barIdEmpty = getId('_MSBC_rect_empty');
}
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()) {
const { data, theme, culture } = this.props;
this._adjustProps();
const { palette } = theme!;
const legends = this._getLegendData(data!, this.props.hideRatio!, palette);
const { isCalloutVisible } = this.state;
this._classNames = getClassNames(this.props.styles!, {
legendColor: this.state.color,
theme: theme!,
variant: this.props.variant,
hideLabels: this.props.hideLabels,
});
const legendName = this.state.xCalloutValue ? this.state.xCalloutValue : this.state.calloutLegend;
const calloutYVal = this.state.yCalloutValue ? this.state.yCalloutValue : this.state.dataForHoverCard;
this._longestBarTotalValue = this._computeLongestBarTotalValue();
const bars: JSX.Element[] = data!.map((singleChartData: IChartProps, index: number) => {
const singleChartBars = this._createBarsAndLegends(
singleChartData!,
this.props.barHeight!,
palette,
this.props.hideRatio![index],
this.props.hideDenominator![index],
this.props.href,
index,
);
return (
<div key={index} id={`_MSBC_bar-${index}`}>
{singleChartBars}
</div>
);
});
return (
<div className={this._classNames.root} onMouseLeave={this._handleChartMouseLeave}>
{bars}
{!this.props.hideLegend && <div className={this._classNames.legendContainer}>{legends}</div>}
<Callout
gapSpace={15}
isBeakVisible={false}
target={this.state.refSelected}
setInitialFocus={true}
hidden={!(!this.props.hideTooltip && 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={legendName} YValue={calloutYVal} color={this.state.color} culture={culture} />
)}
</>
</Callout>
</div>
);
}
return (
<div
id={this._emptyChartId}
role={'alert'}
style={{ opacity: '0' }}
aria-label={'Graph has no data to display'}
/>
);
}
/**
* 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,
hideRatio: boolean,
hideDenominator: boolean,
href?: string,
barNo?: number,
): 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 { culture } = this.props;
const defaultPalette: string[] = [palette.blueLight, palette.blue, palette.blueMid, palette.red, palette.black];
// calculating starting point of each bar and it's range
const startingPoint: number[] = [];
const barTotalValue = data.chartData!.reduce(
(acc: number, point: IChartDataPoint) => acc + (point.data ? point.data : 0),
0,
);
const total =
this.props.variant === MultiStackedBarChartVariant.AbsoluteScale ? this._longestBarTotalValue : barTotalValue;
let sumOfPercent = 0;
data.chartData!.map((point: IChartDataPoint, index: number) => {
const pointData = point.data ? point.data : 0;
const currValue = (pointData / total) * 100;
let value = currValue ? currValue : 0;
if (value < 1 && value !== 0) {
value = 1;
} else Iif (value > 99 && value !== 100) {
value = 99;
}
sumOfPercent += value;
return sumOfPercent;
});
// Include an imaginary placeholder bar with value equal to
// the difference between longestBarTotalValue and barTotalValue
// while calculating sumOfPercent to get correct scalingRatio for absolute-scale variant
if (this.props.variant === MultiStackedBarChartVariant.AbsoluteScale) {
let value = total === 0 ? 0 : ((total - barTotalValue) / total) * 100;
Iif (value < 1 && value !== 0) {
value = 1;
} else Iif (value > 99 && value !== 100) {
value = 99;
}
sumOfPercent += value;
}
/**
* 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;
let prevPosition = 0;
let value = 0;
const bars = data.chartData!.map((point: IChartDataPoint, index: number) => {
const color: string = point.color
? point.color
: point.placeHolder
? palette.neutralLight
: defaultPalette[Math.floor(Math.random() * 4 + 1)];
const pointData = point.data ? point.data : 0;
if (index > 0) {
prevPosition += value;
}
value = (pointData / total) * 100 ? (pointData / total) * 100 : 0;
if (value < 1 && value !== 0) {
value = 1 / scalingRatio;
} else Iif (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,
href,
variant: this.props.variant,
hideLabels: this.props.hideLabels,
});
return (
<g
key={index}
className={point.placeHolder ? this._classNames.placeHolderOnHover : this._classNames.opacityChangeOnHover}
ref={(e: SVGGElement) => {
this._refCallback(e, point.legend!);
}}
data-is-focusable={!this.props.hideTooltip && shouldHighlight}
onFocus={this._onBarFocus.bind(this, pointData, color, point)}
onBlur={this._onBarLeave}
role="img"
aria-label={this._getAriaLabel(point)}
onMouseOver={point.placeHolder ? undefined : this._onBarHover.bind(this, pointData, color, point)}
onMouseMove={point.placeHolder ? undefined : this._onBarHover.bind(this, pointData, color, point)}
onMouseLeave={point.placeHolder ? undefined : this._onBarLeave}
onClick={href ? (point.placeHolder ? undefined : this._redirectToUrl.bind(this, href)) : point.onClick}
>
<rect
key={index}
id={`${this._barId}-${barNo}-${index}`}
x={`${
this._isRTL
? 100 - startingPoint[index] - value - this.state.barSpacingInPercent * index
: startingPoint[index] + this.state.barSpacingInPercent * index
}%`}
y={0}
width={value + '%'}
height={barHeight}
fill={color}
/>
</g>
);
});
if (this.props.variant === MultiStackedBarChartVariant.AbsoluteScale && !this.props.hideLabels) {
let showLabel = false;
let barLabel = 0;
if (this._noLegendHighlighted()) {
showLabel = true;
barLabel = barTotalValue;
} else E{
data.chartData?.forEach(point => {
Iif (this._legendHighlighted(point.legend!)) {
showLabel = true;
barLabel += point.data ? point.data : 0;
}
});
}
if (showLabel) {
bars.push(
<text
key="text"
x={`${
this._isRTL
? 100 - (startingPoint[startingPoint.length - 1] || 0) - value - totalMarginPercent
: (startingPoint[startingPoint.length - 1] || 0) + value + totalMarginPercent
}%`}
textAnchor={'start'}
y={barHeight / 2}
dominantBaseline="central"
transform={`translate(${this._isRTL ? -4 : 4})`}
className={this._classNames.barLabel}
aria-label={`Total: ${barLabel}`}
role="img"
>
{formatValueWithSIPrefix(barLabel)}
</text>,
);
}
} else {
// Render placeholder bars only for part-to-whole variant
Iif (data.chartData!.length === 0) {
bars.push(
<g key={0} className={this._classNames.noData} onClick={this._redirectToUrl.bind(this, href)}>
<rect
key={0}
id={this._barIdPlaceholderPartToWhole}
x={'0%'}
y={0}
width={'100%'}
height={barHeight}
fill={palette.neutralLight}
/>
</g>,
);
}
Iif (barTotalValue === 0) {
bars.push(
<g key={'empty'} className={this._classNames.noData} onClick={this._redirectToUrl.bind(this, href)}>
<rect
key={0}
id={this._barIdEmpty}
x={'0%'}
y={0}
width={'100%'}
height={barHeight}
fill={palette.neutralLight}
/>
</g>,
);
}
}
const hideNumber = hideRatio === undefined ? false : hideRatio;
// Hide right side text of chart title for absolute-scale variant
const showRatio =
this.props.variant !== MultiStackedBarChartVariant.AbsoluteScale && !hideNumber && data!.chartData!.length === 2;
const showNumber =
this.props.variant !== MultiStackedBarChartVariant.AbsoluteScale && !hideNumber && data!.chartData!.length === 1;
const getChartData = () => convertToLocaleString(data!.chartData![0].data ? data!.chartData![0].data : 0, culture);
return (
<div className={this._classNames.singleChartRoot}>
<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>
{!hideDenominator && (
<span className={this._classNames.ratioDenominator}>
{' / ' + convertToLocaleString(barTotalValue, culture)}
</span>
)}
</div>
)}
{showNumber && (
<div
className={this._classNames.ratioNumerator}
{...getAccessibleDataObject(data!.chartDataAccessibilityData, 'text', false)}
>
{getChartData()}
</div>
)}
</div>
</FocusZone>
<FocusZone direction={FocusZoneDirection.horizontal}>
<div className={this._classNames.chartWrapper}>
<svg ref={this.barChartSvgRef} className={this._classNames.chart} aria-label={data?.chartTitle}>
{bars}
</svg>
</div>
</FocusZone>
</div>
);
}
private _onBarFocus(pointData: number, color: string, point: IChartDataPoint): void {
this.state.refArray.forEach((obj: IRefArrayData) => {
Iif (obj.legendText === 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,
xCalloutValue: point.xAxisCalloutData!,
yCalloutValue: point.yAxisCalloutData!,
dataPointCalloutProps: point,
callOutAccessibilityData: point.callOutAccessibilityData!,
});
}
});
}
private _refCallback(element: SVGGElement, legendTitle: string): void {
this.state.refArray.push({ legendText: legendTitle, refElement: element });
}
private _adjustProps = (): void => {
const { theme, className, styles, width, barHeight } = this.props;
this._classNames = getClassNames(styles!, {
legendColor: this.state.color,
theme: theme!,
width,
className,
barHeight,
});
};
private _onHover(legendTitle: string): void {
this.setState({
activeLegend: legendTitle,
});
}
private _getLegendData = (data: IChartProps[], hideRatio: boolean[], palette: IPalette): JSX.Element => {
const defaultPalette: string[] = [palette.blueLight, palette.blue, palette.blueMid, palette.red, palette.black];
const actions: ILegend[] = [];
data.forEach((singleChartData: IChartProps, index: number) => {
const validChartData = singleChartData.chartData!.filter((_: IChartDataPoint) => !_.placeHolder);
if (validChartData!.length < 3) {
const hideNumber = hideRatio[index] === undefined ? false : hideRatio[index];
if (hideNumber) {
validChartData!.forEach((point: IChartDataPoint) => {
const color: string = point.color ? point.color : defaultPalette[Math.floor(Math.random() * 4 + 1)];
const checkSimilarLegends = actions.filter(
(leg: ILegend) => leg.title === point.legend! && leg.color === color,
);
Iif (checkSimilarLegends!.length > 0) {
return;
}
const legend: ILegend = {
title: point.legend!,
color,
action: () => {
this._onClick(point.legend!);
},
hoverAction: () => {
this._handleChartMouseLeave();
this._onHover(point.legend!);
},
onMouseOutAction: () => {
this._onLeave();
},
};
actions.push(legend);
});
}
} else {
validChartData!.forEach((point: IChartDataPoint) => {
const color: string = point.color ? point.color : defaultPalette[Math.floor(Math.random() * 4 + 1)];
const checkSimilarLegends = actions.filter(
(leg: ILegend) => leg.title === point.legend! && leg.color === color,
);
if (checkSimilarLegends!.length > 0) {
return;
}
const legend: ILegend = {
title: point.legend!,
color,
action: () => {
this._onClick(point.legend!);
},
hoverAction: () => {
this._handleChartMouseLeave();
this._onHover(point.legend!);
},
onMouseOutAction: () => {
this._onLeave();
},
};
actions.push(legend);
});
}
});
return (
<Legends
legends={actions}
overflowProps={this.props.legendsOverflowProps}
focusZonePropsInHoverCard={this.props.focusZonePropsForLegendsInHoverCard}
overflowText={this.props.legendsOverflowText}
{...this.props.legendProps}
/>
);
};
private _onClick(legendTitle: string): void {
Iif (this.state.selectedLegend === legendTitle) {
this.setState({
selectedLegend: '',
});
} else {
this.setState({
selectedLegend: 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,
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 _computeLongestBarTotalValue = () => {
let longestBarTotalValue = 0;
this.props.data!.forEach(({ chartData }) => {
const barTotalValue = chartData!.reduce(
(acc: number, point: IChartDataPoint) => acc + (point.data ? point.data : 0),
0,
);
longestBarTotalValue = Math.max(longestBarTotalValue, barTotalValue);
});
return longestBarTotalValue;
};
private _isChartEmpty(): boolean {
return !(
this.props.data &&
this.props.data.length > 0 &&
this.props.data.filter(
item => item.chartData && item.chartData.length === 0 && (!item.chartTitle || item.chartTitle === ''),
).length === 0
);
}
}
|