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1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 | 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 446x 446x 22x 22x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 48x 55x 48x 48x 48x 22x 21x 58x 58x 58x 58x 58x 58x 6x 6x 58x 58x 55x 58x 58x 58x 77x 77x 77x 48x 182x 182x 445x 24x 421x 445x 48x 57x 48x 77x 48x 77x 77x 77x 77x 48x 6x 2x 2x 4x 4x 48x 55x 55x 55x 55x 138x 138x 5x 2x 3x 1x 2x 2x 138x 55x 16x 16x 16x 5x 2x 3x 16x 55x 48x 48x 446x 446x 446x 159x 6x 153x 108x 45x 287x 4x 283x 48x 446x 446x 446x 446x 446x 446x 48x 446x 446x 446x 159x 114x 6x 108x 45x 45x 287x 4x 283x 77x 77x 77x 4x 73x 181x 181x 181x 181x 181x 181x 181x 181x 181x 181x 3x 3x 3x 3x 6x 181x 181x 181x 181x 268x 268x 268x 268x 268x 268x 268x 268x 268x 268x 268x 268x 268x 268x 268x 178x 178x 178x 178x 178x 178x 178x 178x 268x 245x 243x 243x 80x 243x 483x 23x 23x 181x 77x 77x 75x 75x 77x 2x 2x 2x 2x 2x 77x 48x 10x 10x 2x 8x 10x 10x 10x 19x 19x 19x 19x 9x 19x 19x 19x 19x 19x 10x 48x 9x 9x 48x 276x 276x 276x 3x 276x 4x 276x 22x 489x 48x 48x 48x 9x 9x 9x 9x 26x 9x 9x 9x 9x 7x 7x 48x 692x 692x 48x 48x 3x 3x 48x 10x 48x 2x 1x 1x 2x 2x 2x 2x 2x 2x 3x 2x 48x 2x 1x 1x 2x 2x 2x 2x 2x 2x 2x 3x 2x 48x 48x 290x 48x 283x 48x 32x 48x 449x 449x 449x 449x 449x 449x 449x 22x 58x 141x 22x | import * as React from 'react';
import { Axis as D3Axis } from 'd3-axis';
import { select as d3Select, pointer } from 'd3-selection';
import { bisector } from 'd3-array';
import { ILegend, Legends } from '../Legends/index';
import { line as d3Line, curveLinear as d3curveLinear } from 'd3-shape';
import { classNamesFunction, getId, find, memoizeFunction, getRTL } from '@fluentui/react/lib/Utilities';
import {
IAccessibilityProps,
CartesianChart,
IBasestate,
IChildProps,
ILineChartProps,
ILineChartPoints,
ICustomizedCalloutData,
IMargins,
IRefArrayData,
IColorFillBarsProps,
ILineChartStyleProps,
ILineChartStyles,
ILineChartGap,
ILineChartDataPoint,
} from '../../index';
import { DirectionalHint } from '@fluentui/react/lib/Callout';
import { EventsAnnotation } from './eventAnnotation/EventAnnotation';
import {
calloutData,
ChartTypes,
getXAxisType,
XAxisTypes,
tooltipOfXAxislabels,
Points,
pointTypes,
getMinMaxOfYAxis,
getTypeOfAxis,
getNextColor,
getColorFromToken,
} from '../../utilities/index';
type NumericAxis = D3Axis<number | { valueOf(): number }>;
const getClassNames = classNamesFunction<ILineChartStyleProps, ILineChartStyles>();
enum PointSize {
hoverSize = 11,
invisibleSize = 1,
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const bisect = bisector((d: any) => d.x).left;
const DEFAULT_LINE_STROKE_SIZE = 4;
// The given shape of a icon must be 2.5 times bigger than line width (known as stroke width)
const PATH_MULTIPLY_SIZE = 2.5;
/**
*
* @param x units from origin
* @param y units from origin
* @param w is the legnth of the each side of a shape
* @param index index to get the shape path
*/
const _getPointPath = (x: number, y: number, w: number, index: number): string => {
const allPointPaths = [
// circle path
`M${x - w / 2} ${y}
A${w / 2} ${w / 2} 0 1 0 ${x + w / 2} ${y}
M${x - w / 2} ${y}
A ${w / 2} ${w / 2} 0 1 1 ${x + w / 2} ${y}
`,
//square
`M${x - w / 2} ${y - w / 2}
L${x + w / 2} ${y - w / 2}
L${x + w / 2} ${y + w / 2}
L${x - w / 2} ${y + w / 2}
Z`,
//triangle
`M${x - w / 2} ${y - 0.2886 * w}
H ${x + w / 2}
L${x} ${y + 0.5774 * w} Z`,
//diamond
`M${x} ${y - w / 2}
L${x + w / 2} ${y}
L${x} ${y + w / 2}
L${x - w / 2} ${y}
Z`,
//pyramid
`M${x} ${y - 0.5774 * w}
L${x + w / 2} ${y + 0.2886 * w}
L${x - w / 2} ${y + 0.2886 * w} Z`,
//hexagon
`M${x - 0.5 * w} ${y - 0.866 * w}
L${x + 0.5 * w} ${y - 0.866 * w}
L${x + w} ${y}
L${x + 0.5 * w} ${y + 0.866 * w}
L${x - 0.5 * w} ${y + 0.866 * w}
L${x - w} ${y}
Z`,
//pentagon
`M${x} ${y - 0.851 * w}
L${x + 0.6884 * w} ${y - 0.2633 * w}
L${x + 0.5001 * w} ${y + 0.6884 * w}
L${x - 0.5001 * w} ${y + 0.6884 * w}
L${x - 0.6884 * w} ${y - 0.2633 * w}
Z`,
//octagon
`M${x - 0.5001 * w} ${y - 1.207 * w}
L${x + 0.5001 * w} ${y - 1.207 * w}
L${x + 1.207 * w} ${y - 0.5001 * w}
L${x + 1.207 * w} ${y + 0.5001 * w}
L${x + 0.5001 * w} ${y + 1.207 * w}
L${x - 0.5001 * w} ${y + 1.207 * w}
L${x - 1.207 * w} ${y + 0.5001 * w}
L${x - 1.207 * w} ${y - 0.5001 * w}
Z`,
];
return allPointPaths[index];
};
type LineChartDataWithIndex = ILineChartPoints & { index: number };
export interface ILineChartState extends IBasestate {
// This array contains data of selected legends for points
selectedLegendPoints: LineChartDataWithIndex[];
// This array contains data of selected legends for color bars
selectedColorBarLegend: IColorFillBarsProps[];
// This is a boolean value which is set to true
// when at least one legend is selected
isSelectedLegend: boolean;
// This value will be used as customized callout props - point callout.
dataPointCalloutProps?: ICustomizedCalloutData;
// This value will be used as Customized callout props - For stack callout.
stackCalloutProps?: ICustomizedCalloutData;
// active or hovered point
activePoint?: string;
// x-axis callout accessibility data
xAxisCalloutAccessibilityData?: IAccessibilityProps;
nearestCircleToHighlight: ILineChartDataPoint | null;
activeLine: number | null;
}
export class LineChartBase extends React.Component<ILineChartProps, ILineChartState> {
public static defaultProps: Partial<ILineChartProps> = {
enableReflow: true,
};
private _points: LineChartDataWithIndex[];
// eslint-disable-next-line @typescript-eslint/no-explicit-any
private _calloutPoints: any[];
// eslint-disable-next-line @typescript-eslint/no-explicit-any
private _xAxisScale: any = '';
// eslint-disable-next-line @typescript-eslint/no-explicit-any
private _yAxisScale: any = '';
private _circleId: string;
private _lineId: string;
private _borderId: string;
private _verticalLine: string;
private _colorFillBarPatternId: string;
private _uniqueCallOutID: string | null;
private _refArray: IRefArrayData[];
private margins: IMargins;
private eventLabelHeight: number = 36;
private lines: JSX.Element[];
private _renderedColorFillBars: JSX.Element[];
private _colorFillBars: IColorFillBarsProps[];
private _tooltipId: string;
private _rectId: string;
private _staticHighlightCircle: string;
private _createLegendsMemoized: (data: LineChartDataWithIndex[]) => JSX.Element;
private _firstRenderOptimization: boolean;
private _emptyChartId: string;
private _isRTL: boolean = getRTL();
constructor(props: ILineChartProps) {
super(props);
this.state = {
hoverXValue: '',
activeLegend: '',
YValueHover: [],
refSelected: '',
selectedLegend: '',
isCalloutVisible: false,
selectedLegendPoints: [],
selectedColorBarLegend: [],
isSelectedLegend: false,
activePoint: '',
nearestCircleToHighlight: null,
activeLine: null,
};
this._refArray = [];
this._points = this._injectIndexPropertyInLineChartData(this.props.data.lineChartData);
this._colorFillBars = [];
this._calloutPoints = calloutData(this._points) || [];
this._circleId = getId('circle');
this._lineId = getId('lineID');
this._borderId = getId('borderID');
this._verticalLine = getId('verticalLine');
this._colorFillBarPatternId = getId('colorFillBarPattern');
this._tooltipId = getId('LineChartTooltipId_');
this._rectId = getId('containerRectLD');
this._staticHighlightCircle = getId('staticHighlightCircle');
this._createLegendsMemoized = memoizeFunction((data: LineChartDataWithIndex[]) => this._createLegends(data));
this._firstRenderOptimization = true;
this._emptyChartId = getId('_LineChart_empty');
props.eventAnnotationProps &&
props.eventAnnotationProps.labelHeight &&
(this.eventLabelHeight = props.eventAnnotationProps.labelHeight);
}
public componentDidUpdate(prevProps: ILineChartProps): void {
/** note that height and width are not used to resize or set as dimesions of the chart,
* fitParentContainer is responisble for setting the height and width or resizing of the svg/chart
*/
Iif (
prevProps.height !== this.props.height ||
prevProps.width !== this.props.width ||
prevProps.data !== this.props.data
) {
this._points = this._injectIndexPropertyInLineChartData(this.props.data.lineChartData);
this._calloutPoints = calloutData(this._points) || [];
}
}
public render(): JSX.Element {
const { tickValues, tickFormat, eventAnnotationProps, legendProps, data } = this.props;
this._points = this._injectIndexPropertyInLineChartData(data.lineChartData);
const isXAxisDateType = getXAxisType(this._points);
let points = this._points;
if (legendProps && !!legendProps.canSelectMultipleLegends) {
points = this.state.selectedLegendPoints.length >= 1 ? this.state.selectedLegendPoints : this._points;
this._calloutPoints = calloutData(points);
}
let legendBars = null;
// reduce computation cost by only creating legendBars
// if when hideLegend is false.
// NOTE: they are rendered only when hideLegend is false in CartesianChart.
if (!this.props.hideLegend) {
legendBars = this._createLegendsMemoized(this._points!);
}
const calloutProps = {
isCalloutVisible: this.state.isCalloutVisible,
directionalHint: DirectionalHint.topAutoEdge,
YValueHover: this.state.YValueHover,
hoverXValue: this.state.hoverXValue,
id: `toolTip${this._uniqueCallOutID}`,
target: this.state.refSelected,
isBeakVisible: false,
gapSpace: 15,
onDismiss: this._closeCallout,
preventDismissOnEvent: () => true,
hidden: !(!this.props.hideTooltip && this.state.isCalloutVisible),
descriptionMessage:
this.props.getCalloutDescriptionMessage && this.state.stackCalloutProps
? this.props.getCalloutDescriptionMessage(this.state.stackCalloutProps)
: undefined,
'data-is-focusable': true,
xAxisCalloutAccessibilityData: this.state.xAxisCalloutAccessibilityData,
...this.props.calloutProps,
};
const tickParams = {
tickValues,
tickFormat,
};
return !this._isChartEmpty() ? (
<CartesianChart
{...this.props}
chartTitle={data.chartTitle}
points={points}
chartType={ChartTypes.LineChart}
isCalloutForStack
calloutProps={calloutProps}
tickParams={tickParams}
legendBars={legendBars}
getmargins={this._getMargins}
getGraphData={this._initializeLineChartData}
xAxisType={isXAxisDateType ? XAxisTypes.DateAxis : XAxisTypes.NumericAxis}
customizedCallout={this._getCustomizedCallout()}
onChartMouseLeave={this._handleChartMouseLeave}
enableFirstRenderOptimization={this.props.enablePerfOptimization && this._firstRenderOptimization}
/* eslint-disable react/jsx-no-bind */
// eslint-disable-next-line react/no-children-prop
children={(props: IChildProps) => {
this._xAxisScale = props.xScale!;
this._yAxisScale = props.yScale!;
return (
<>
<g>
<line
x1={0}
y1={0}
x2={0}
y2={props.containerHeight}
stroke={'#323130'}
id={this._verticalLine}
visibility={'hidden'}
strokeDasharray={'5,5'}
/>
{this.props.optimizeLargeData ? (
<rect
id={this._rectId}
width={props.containerWidth}
height={props.containerHeight}
fill={'transparent'}
/>
) : (
<></>
)}
<g>
{this._renderedColorFillBars}
{this.lines}
</g>
{eventAnnotationProps && (
<EventsAnnotation
theme={this.props.theme}
{...eventAnnotationProps}
scale={props.xScale!}
chartYTop={this.margins.top! + this.eventLabelHeight}
chartYBottom={props.containerHeight! - 35}
/>
)}
</g>
</>
);
}}
/>
) : (
<div
id={this._emptyChartId}
role={'alert'}
style={{ opacity: '0' }}
aria-label={'Graph has no data to display'}
/>
);
}
private _injectIndexPropertyInLineChartData = (lineChartData?: ILineChartPoints[]): LineChartDataWithIndex[] | [] => {
const { allowMultipleShapesForPoints = false } = this.props;
return lineChartData
? lineChartData.map((item: ILineChartPoints, index: number) => {
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,
index: allowMultipleShapesForPoints ? index : -1,
color,
};
})
: [];
};
private _getCustomizedCallout = () => {
return this.props.onRenderCalloutPerStack
? this.props.onRenderCalloutPerStack(this.state.stackCalloutProps)
: this.props.onRenderCalloutPerDataPoint
? this.props.onRenderCalloutPerDataPoint(this.state.dataPointCalloutProps)
: null;
};
private _getMargins = (margins: IMargins) => {
this.margins = margins;
};
private _initializeLineChartData = (
xScale: NumericAxis,
yScale: NumericAxis,
containerHeight: number,
containerWidth: number,
xElement: SVGElement | null,
) => {
this._xAxisScale = xScale;
this._yAxisScale = yScale;
this._renderedColorFillBars = this.props.colorFillBars ? this._createColorFillBars(containerHeight) : [];
this.lines = this._createLines(xElement!, containerHeight!);
};
private _handleSingleLegendSelectionAction = (lineChartItem: LineChartDataWithIndex | IColorFillBarsProps) => {
if (this.state.selectedLegend === lineChartItem.legend) {
this.setState({ selectedLegend: '' });
this._handleLegendClick(lineChartItem, null);
} else {
this.setState({ selectedLegend: lineChartItem.legend });
this._handleLegendClick(lineChartItem, lineChartItem.legend);
}
};
private _onHoverCardHide = () => {
this.setState({
selectedLegendPoints: [],
selectedColorBarLegend: [],
isSelectedLegend: false,
});
};
private _createLegends(data: LineChartDataWithIndex[]): JSX.Element {
const { legendProps, allowMultipleShapesForPoints = false } = this.props;
const isLegendMultiSelectEnabled = !!(legendProps && !!legendProps.canSelectMultipleLegends);
const legendDataItems = data.map((point: LineChartDataWithIndex) => {
const color: string = point.color!;
// mapping data to the format Legends component needs
const legend: ILegend = {
title: point.legend!,
color,
action: () => {
if (isLegendMultiSelectEnabled) {
this._handleMultipleLineLegendSelectionAction(point);
} else {
this._handleSingleLegendSelectionAction(point);
}
},
onMouseOutAction: () => {
this.setState({ activeLegend: '' });
},
hoverAction: () => {
this._handleChartMouseLeave();
this.setState({ activeLegend: point.legend });
},
...(point.legendShape && {
shape: point.legendShape,
}),
...(allowMultipleShapesForPoints && {
shape: Points[point.index % Object.keys(pointTypes).length] as ILegend['shape'],
}),
};
return legend;
});
const colorFillBarsLegendDataItems = this.props.colorFillBars
? this.props.colorFillBars.map((colorFillBar: IColorFillBarsProps, index: number) => {
const title = colorFillBar.legend;
// isInverted property is applicable to v8 themes only
const color = getColorFromToken(colorFillBar.color, this.props.theme?.isInverted);
const legend: ILegend = {
title,
color,
action: () => {
if (isLegendMultiSelectEnabled) {
this._handleMultipleColorFillBarLegendSelectionAction(colorFillBar);
} else {
this._handleSingleLegendSelectionAction(colorFillBar);
}
},
onMouseOutAction: () => {
this.setState({ activeLegend: '' });
},
hoverAction: () => {
this._handleChartMouseLeave();
this.setState({ activeLegend: title });
},
opacity: this._getColorFillBarOpacity(colorFillBar),
stripePattern: colorFillBar.applyPattern,
};
return legend;
})
: [];
return (
<Legends
legends={[...legendDataItems, ...colorFillBarsLegendDataItems]}
enabledWrapLines={this.props.enabledLegendsWrapLines}
overflowProps={this.props.legendsOverflowProps}
focusZonePropsInHoverCard={this.props.focusZonePropsForLegendsInHoverCard}
overflowText={this.props.legendsOverflowText}
{...(isLegendMultiSelectEnabled && { onLegendHoverCardLeave: this._onHoverCardHide })}
{...this.props.legendProps}
/>
);
}
private _closeCallout = () => {
this.setState({
isCalloutVisible: false,
});
};
private _getBoxWidthOfShape = (pointId: string, pointIndex: number, isLastPoint: boolean) => {
const { allowMultipleShapesForPoints = false, strokeWidth = DEFAULT_LINE_STROKE_SIZE } = this.props;
const { activePoint } = this.state;
if (allowMultipleShapesForPoints) {
if (activePoint === pointId) {
return PointSize.hoverSize;
} else if (pointIndex === 1 || isLastPoint) {
return strokeWidth * PATH_MULTIPLY_SIZE;
} else {
return PointSize.invisibleSize;
}
} else {
if (activePoint === pointId) {
return PointSize.hoverSize;
} else {
return PointSize.invisibleSize;
}
}
};
private _getPath = (
xPos: number,
yPos: number,
pointId: string,
pointIndex: number,
isLastPoint: boolean,
pointOftheLine: number,
): string => {
const { allowMultipleShapesForPoints = false } = this.props;
let w = this._getBoxWidthOfShape(pointId, pointIndex, isLastPoint);
const index: number = allowMultipleShapesForPoints ? pointOftheLine % Object.keys(pointTypes).length : 0;
const widthRatio = pointTypes[index].widthRatio;
w = widthRatio > 1 ? w / widthRatio : w;
return _getPointPath(xPos, yPos, w, index);
};
private _getPointFill = (lineColor: string, pointId: string, pointIndex: number, isLastPoint: boolean) => {
const { activePoint } = this.state;
const { theme, allowMultipleShapesForPoints = false } = this.props;
if (allowMultipleShapesForPoints) {
if (pointIndex === 1 || isLastPoint) {
if (activePoint === pointId) {
return theme!.semanticColors.bodyBackground;
} else {
return lineColor;
}
} else {
Iif (activePoint === pointId) {
return theme!.semanticColors.bodyBackground;
} else {
return lineColor;
}
}
} else {
if (activePoint === pointId) {
return theme!.semanticColors.bodyBackground;
} else {
return lineColor;
}
}
};
private _createLines(xElement: SVGElement, containerHeight: number): JSX.Element[] {
const lines: JSX.Element[] = [];
if (this.state.isSelectedLegend) {
this._points = this.state.selectedLegendPoints;
} else {
this._points = this._injectIndexPropertyInLineChartData(this.props.data.lineChartData);
}
for (let i = this._points.length - 1; i >= 0; i--) {
const linesForLine: JSX.Element[] = [];
const bordersForLine: JSX.Element[] = [];
const pointsForLine: JSX.Element[] = [];
const legendVal: string = this._points[i].legend;
const lineColor: string = this._points[i].color!;
const { activePoint } = this.state;
const { theme } = this.props;
const verticaLineHeight = containerHeight - this.margins.bottom! + 6;
if (this._points[i].data.length === 1) {
const { x: x1, y: y1, xAxisCalloutData, xAxisCalloutAccessibilityData } = this._points[i].data[0];
const circleId = `${this._circleId}_${i}`;
const isLegendSelected: boolean =
this._legendHighlighted(legendVal) || this._noLegendHighlighted() || this.state.isSelectedLegend;
pointsForLine.push(
<circle
id={circleId}
key={circleId}
r={activePoint === circleId ? 5.5 : 3.5}
cx={this._xAxisScale(x1)}
cy={this._yAxisScale(y1)}
fill={activePoint === circleId ? theme!.semanticColors.bodyBackground : lineColor}
opacity={isLegendSelected ? 1 : 0.1}
onMouseOver={this._handleHover.bind(
this,
x1,
y1,
verticaLineHeight,
xAxisCalloutData,
circleId,
xAxisCalloutAccessibilityData,
)}
onMouseMove={this._handleHover.bind(
this,
x1,
y1,
verticaLineHeight,
xAxisCalloutData,
circleId,
xAxisCalloutAccessibilityData,
)}
onMouseOut={this._handleMouseOut}
strokeWidth={activePoint === circleId ? DEFAULT_LINE_STROKE_SIZE : 0}
stroke={activePoint === circleId ? lineColor : ''}
role="img"
aria-label={this._getAriaLabel(i, 0)}
data-is-focusable={isLegendSelected}
ref={(e: SVGCircleElement | null) => {
this._refCallback(e!, circleId);
}}
onFocus={() => this._handleFocus(circleId, x1, xAxisCalloutData, circleId, xAxisCalloutAccessibilityData)}
onBlur={this._handleMouseOut}
{...this._getClickHandler(this._points[i].data[0].onDataPointClick)}
/>,
);
}
let gapIndex = 0;
const gaps = this._points[i].gaps?.sort((a, b) => a.startIndex - b.startIndex) ?? [];
// Use path rendering technique for larger datasets to optimize performance.
Iif (this.props.optimizeLargeData && this._points[i].data.length > 1) {
const line = d3Line()
// eslint-disable-next-line @typescript-eslint/no-explicit-any
.x((d: any) => this._xAxisScale(d[0]))
// eslint-disable-next-line @typescript-eslint/no-explicit-any
.y((d: any) => this._yAxisScale(d[1]))
.curve(d3curveLinear);
const lineId = `${this._lineId}_${i}`;
const borderId = `${this._borderId}_${i}`;
const strokeWidth =
this._points[i].lineOptions?.strokeWidth || this.props.strokeWidth || DEFAULT_LINE_STROKE_SIZE;
const isLegendSelected: boolean =
this._legendHighlighted(legendVal) || this._noLegendHighlighted() || this.state.isSelectedLegend;
const lineData: [number, number][] = [];
for (let k = 0; k < this._points[i].data.length; k++) {
lineData.push([
this._points[i].data[k].x instanceof Date
? (this._points[i].data[k].x as Date).getTime()
: (this._points[i].data[k].x as number),
this._points[i].data[k].y,
]);
}
if (isLegendSelected) {
const lineBorderWidth = this._points[i].lineOptions?.lineBorderWidth
? Number.parseFloat(this._points[i].lineOptions!.lineBorderWidth!.toString())
: 0;
Iif (lineBorderWidth > 0) {
bordersForLine.push(
<path
id={borderId}
key={borderId}
d={line(lineData)!}
fill="transparent"
strokeLinecap={this._points[i].lineOptions?.strokeLinecap ?? 'round'}
strokeWidth={Number.parseFloat(strokeWidth.toString()) + lineBorderWidth}
stroke={this._points[i].lineOptions?.lineBorderColor || theme!.semanticColors.bodyBackground}
opacity={1}
/>,
);
}
linesForLine.push(
<path
id={lineId}
key={lineId}
d={line(lineData)!}
fill="transparent"
data-is-focusable={true}
stroke={lineColor}
strokeWidth={strokeWidth}
strokeLinecap={this._points[i].lineOptions?.strokeLinecap ?? 'round'}
onMouseMove={this._onMouseOverLargeDataset.bind(this, i, verticaLineHeight)}
onMouseOver={this._onMouseOverLargeDataset.bind(this, i, verticaLineHeight)}
onMouseOut={this._handleMouseOut}
{...this._getClickHandler(this._points[i].onLineClick)}
opacity={1}
role="img"
aria-label={`${legendVal}, series ${i + 1} of ${this._points.length} with ${
this._points[i].data.length
} data points.`}
/>,
);
} else {
linesForLine.push(
<path
id={lineId}
key={lineId}
d={line(lineData)!}
fill="transparent"
data-is-focusable={false}
stroke={lineColor}
strokeWidth={strokeWidth}
strokeLinecap={this._points[i].lineOptions?.strokeLinecap ?? 'round'}
opacity={0.1}
role="img"
aria-label={`${legendVal}, series ${i + 1} of ${this._points.length} with ${
this._points[i].data.length
} data points.`}
/>,
);
}
const isPointHighlighted = this.state.activeLine !== null && this.state.activeLine === i;
pointsForLine.push(
<circle
id={`${this._staticHighlightCircle}_${i}`}
key={`${this._staticHighlightCircle}_${i}`}
r={5.5}
cx={0}
cy={0}
fill={theme!.semanticColors.bodyBackground}
strokeWidth={DEFAULT_LINE_STROKE_SIZE}
stroke={lineColor}
visibility={isPointHighlighted ? 'visibility' : 'hidden'}
onMouseMove={this._onMouseOverLargeDataset.bind(this, i, verticaLineHeight)}
onMouseOver={this._onMouseOverLargeDataset.bind(this, i, verticaLineHeight)}
onMouseOut={this._handleMouseOut}
/>,
);
} else if (!this.props.optimizeLargeData) {
for (let j = 1; j < this._points[i].data.length; j++) {
const gapResult = this._checkInGap(j, gaps, gapIndex);
const isInGap = gapResult.isInGap;
gapIndex = gapResult.gapIndex;
const lineId = `${this._lineId}_${i}_${j}`;
const borderId = `${this._borderId}_${i}_${j}`;
const circleId = `${this._circleId}_${i}_${j}`;
const { x: x1, y: y1, xAxisCalloutData, xAxisCalloutAccessibilityData } = this._points[i].data[j - 1];
const { x: x2, y: y2 } = this._points[i].data[j];
let path = this._getPath(
this._xAxisScale(x1),
this._yAxisScale(y1),
circleId,
j,
false,
this._points[i].index,
);
const strokeWidth =
this._points[i].lineOptions?.strokeWidth || this.props.strokeWidth || DEFAULT_LINE_STROKE_SIZE;
const isLegendSelected: boolean =
this._legendHighlighted(legendVal) || this._noLegendHighlighted() || this.state.isSelectedLegend;
const currentPointHidden = this._points[i].hideNonActiveDots && activePoint !== circleId;
pointsForLine.push(
<path
id={circleId}
key={circleId}
d={path}
data-is-focusable={isLegendSelected}
onMouseOver={this._handleHover.bind(
this,
x1,
y1,
verticaLineHeight,
xAxisCalloutData,
circleId,
xAxisCalloutAccessibilityData,
)}
onMouseMove={this._handleHover.bind(
this,
x1,
y1,
verticaLineHeight,
xAxisCalloutData,
circleId,
xAxisCalloutAccessibilityData,
)}
onMouseOut={this._handleMouseOut}
onFocus={() => this._handleFocus(lineId, x1, xAxisCalloutData, circleId, xAxisCalloutAccessibilityData)}
onBlur={this._handleMouseOut}
{...this._getClickHandler(this._points[i].data[j - 1].onDataPointClick)}
opacity={isLegendSelected && !currentPointHidden ? 1 : 0.01}
fill={this._getPointFill(lineColor, circleId, j, false)}
stroke={lineColor}
strokeWidth={strokeWidth}
role="img"
aria-label={this._getAriaLabel(i, j - 1)}
/>,
);
if (j + 1 === this._points[i].data.length) {
// If this is last point of the line segment.
const lastCircleId = `${circleId}${j}L`;
const hiddenHoverCircleId = `${circleId}${j}D`;
const lastPointHidden = this._points[i].hideNonActiveDots && activePoint !== lastCircleId;
path = this._getPath(
this._xAxisScale(x2),
this._yAxisScale(y2),
lastCircleId,
j,
true,
this._points[i].index,
);
const {
xAxisCalloutData: lastCirlceXCallout,
xAxisCalloutAccessibilityData: lastCirlceXCalloutAccessibilityData,
} = this._points[i].data[j];
pointsForLine.push(
<React.Fragment key={`${lastCircleId}_container`}>
<path
id={lastCircleId}
key={lastCircleId}
d={path}
data-is-focusable={isLegendSelected}
onMouseOver={this._handleHover.bind(
this,
x2,
y2,
verticaLineHeight,
lastCirlceXCallout,
lastCircleId,
lastCirlceXCalloutAccessibilityData,
)}
onMouseMove={this._handleHover.bind(
this,
x2,
y2,
verticaLineHeight,
lastCirlceXCallout,
lastCircleId,
lastCirlceXCalloutAccessibilityData,
)}
onMouseOut={this._handleMouseOut}
onFocus={() =>
this._handleFocus(lineId, x2, lastCirlceXCallout, lastCircleId, lastCirlceXCalloutAccessibilityData)
}
onBlur={this._handleMouseOut}
{...this._getClickHandler(this._points[i].data[j].onDataPointClick)}
opacity={isLegendSelected && !lastPointHidden ? 1 : 0.01}
fill={this._getPointFill(lineColor, lastCircleId, j, true)}
stroke={lineColor}
strokeWidth={strokeWidth}
role="img"
aria-label={this._getAriaLabel(i, j)}
/>
{/* Dummy circle acting as magnetic latch for last callout point */}
<circle
id={hiddenHoverCircleId}
key={hiddenHoverCircleId}
r={8}
cx={this._xAxisScale(x2)}
cy={this._yAxisScale(y2)}
opacity={0}
width={0}
onMouseOver={this._handleHover.bind(
this,
x2,
y2,
verticaLineHeight,
lastCirlceXCallout,
lastCircleId,
lastCirlceXCalloutAccessibilityData,
)}
onMouseMove={this._handleHover.bind(
this,
x2,
y2,
verticaLineHeight,
lastCirlceXCallout,
lastCircleId,
lastCirlceXCalloutAccessibilityData,
)}
onMouseOut={this._handleMouseOut}
strokeWidth={0}
focusable={false}
onBlur={this._handleMouseOut}
/>
</React.Fragment>,
);
/* eslint-enable react/jsx-no-bind */
}
if (isLegendSelected) {
// don't draw line if it is in a gap
if (!isInGap) {
const lineBorderWidth = this._points[i].lineOptions?.lineBorderWidth
? Number.parseFloat(this._points[i].lineOptions!.lineBorderWidth!.toString())
: 0;
if (lineBorderWidth > 0) {
bordersForLine.push(
<line
id={borderId}
key={borderId}
x1={this._xAxisScale(x1)}
y1={this._yAxisScale(y1)}
x2={this._xAxisScale(x2)}
y2={this._yAxisScale(y2)}
strokeLinecap={this._points[i].lineOptions?.strokeLinecap ?? 'round'}
strokeWidth={Number.parseFloat(strokeWidth.toString()) + lineBorderWidth}
stroke={this._points[i].lineOptions?.lineBorderColor || theme!.semanticColors.bodyBackground}
opacity={1}
/>,
);
}
linesForLine.push(
<line
id={lineId}
key={lineId}
x1={this._xAxisScale(x1)}
y1={this._yAxisScale(y1)}
x2={this._xAxisScale(x2)}
y2={this._yAxisScale(y2)}
strokeWidth={strokeWidth}
ref={(e: SVGLineElement | null) => {
this._refCallback(e!, lineId);
}}
onMouseOver={this._handleHover.bind(
this,
x1,
y1,
verticaLineHeight,
xAxisCalloutData,
circleId,
xAxisCalloutAccessibilityData,
)}
onMouseMove={this._handleHover.bind(
this,
x1,
y1,
verticaLineHeight,
xAxisCalloutData,
circleId,
xAxisCalloutAccessibilityData,
)}
onMouseOut={this._handleMouseOut}
stroke={lineColor}
strokeLinecap={this._points[i].lineOptions?.strokeLinecap ?? 'round'}
strokeDasharray={this._points[i].lineOptions?.strokeDasharray}
strokeDashoffset={this._points[i].lineOptions?.strokeDashoffset}
opacity={1}
{...this._getClickHandler(this._points[i].onLineClick)}
/>,
);
}
} else {
if (!isInGap) {
linesForLine.push(
<line
id={lineId}
key={lineId}
x1={this._xAxisScale(x1)}
y1={this._yAxisScale(y1)}
x2={this._xAxisScale(x2)}
y2={this._yAxisScale(y2)}
strokeWidth={strokeWidth}
stroke={lineColor}
strokeLinecap={this._points[i].lineOptions?.strokeLinecap ?? 'round'}
strokeDasharray={this._points[i].lineOptions?.strokeDasharray}
strokeDashoffset={this._points[i].lineOptions?.strokeDashoffset}
opacity={0.1}
/>,
);
}
}
}
}
lines.push(...bordersForLine, ...linesForLine, ...pointsForLine);
}
const classNames = getClassNames(this.props.styles!, {
theme: this.props.theme!,
});
// Removing un wanted tooltip div from DOM, when prop not provided.
if (!this.props.showXAxisLablesTooltip) {
try {
document.getElementById(this._tooltipId) && document.getElementById(this._tooltipId)!.remove();
// eslint-disable-next-line no-empty
} catch (e) {}
}
// Used to display tooltip at x axis labels.
if (!this.props.wrapXAxisLables && this.props.showXAxisLablesTooltip) {
const xAxisElement = d3Select(xElement).call(this._xAxisScale);
try {
document.getElementById(this._tooltipId) && document.getElementById(this._tooltipId)!.remove();
// eslint-disable-next-line no-empty
} catch (e) {}
const tooltipProps = {
tooltipCls: classNames.tooltip!,
id: this._tooltipId,
xAxis: xAxisElement,
};
xAxisElement && tooltipOfXAxislabels(tooltipProps);
}
return lines;
}
private _createColorFillBars = (containerHeight: number) => {
const colorFillBars: JSX.Element[] = [];
if (this.state.isSelectedLegend) {
this._colorFillBars = this.state.selectedColorBarLegend;
} else {
this._colorFillBars = this.props.colorFillBars!;
}
const yMinMaxValues = getMinMaxOfYAxis(this._points, ChartTypes.LineChart);
const FILL_Y_PADDING = 3;
for (let i = 0; i < this._colorFillBars.length; i++) {
const colorFillBar = this._colorFillBars[i];
const colorFillBarId = getId(colorFillBar.legend.replace(/\W/g, ''));
// isInverted property is applicable to v8 themes only
const color = getColorFromToken(colorFillBar.color, this.props.theme?.isInverted);
if (colorFillBar.applyPattern) {
// Using a pattern element because CSS was unable to render diagonal stripes for rect elements
colorFillBars.push(this._getStripePattern(color, i));
}
for (let j = 0; j < colorFillBar.data.length; j++) {
const startX = colorFillBar.data[j].startX;
const endX = colorFillBar.data[j].endX;
const opacity =
this._legendHighlighted(colorFillBar.legend) || this._noLegendHighlighted() || this.state.isSelectedLegend
? this._getColorFillBarOpacity(colorFillBar)
: 0.1;
colorFillBars.push(
<rect
fill={colorFillBar.applyPattern ? `url(#${this._colorFillBarPatternId}_${i})` : color}
fillOpacity={opacity}
x={this._isRTL ? this._xAxisScale(endX) : this._xAxisScale(startX)}
y={this._yAxisScale(yMinMaxValues.endValue) - FILL_Y_PADDING}
width={Math.abs(this._xAxisScale(endX) - this._xAxisScale(startX))}
height={
this._yAxisScale(this.props.yMinValue || 0) - this._yAxisScale(yMinMaxValues.endValue) + FILL_Y_PADDING
}
key={`${colorFillBarId}${j}`}
/>,
);
}
}
return colorFillBars;
};
private _getStripePattern = (color: string, id: number) => {
// This describes a tile pattern that resembles diagonal stripes
// For more information: https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/d
const stripePath = 'M-4,4 l8,-8 M0,16 l16,-16 M12,20 l8,-8';
return (
<pattern
id={`${this._colorFillBarPatternId}_${id}`}
width={16}
height={16}
key={`${this._colorFillBarPatternId}_${id}`}
patternUnits={'userSpaceOnUse'}
>
<path d={stripePath} stroke={color} strokeWidth={1.25} />
</pattern>
);
};
private _checkInGap = (pointIndex: number, gaps: ILineChartGap[], currentGapIndex: number) => {
let gapIndex = currentGapIndex;
let isInGap = false;
while (gapIndex < gaps.length && pointIndex > gaps[gapIndex].endIndex) {
gapIndex++;
}
if (gapIndex < gaps.length && pointIndex > gaps[gapIndex].startIndex && pointIndex <= gaps[gapIndex].endIndex) {
isInGap = true;
}
return { isInGap, gapIndex };
};
private _refCallback(element: SVGGElement, legendTitle: string): void {
this._refArray.push({ index: legendTitle, refElement: element });
}
private _onMouseOverLargeDataset = (
linenumber: number,
lineHeight: number,
mouseEvent: React.MouseEvent<SVGRectElement | SVGPathElement | SVGCircleElement>,
) => {
mouseEvent.persist();
const { data } = this.props;
const { lineChartData } = data;
// This will get the value of the X when mouse is on the chart
const xOffset = this._xAxisScale.invert(pointer(mouseEvent)[0], document.getElementById(this._rectId)!);
const i = bisect(lineChartData![linenumber].data, xOffset);
const d0 = lineChartData![linenumber].data[i - 1] as ILineChartDataPoint;
const d1 = lineChartData![linenumber].data[i] as ILineChartDataPoint;
let axisType: XAxisTypes | null = null;
let xPointToHighlight: string | Date | number | null = null;
let index: null | number = null;
if (d0 === undefined && d1 !== undefined) {
xPointToHighlight = d1.x;
index = i;
} else if (d0 !== undefined && d1 === undefined) {
xPointToHighlight = d0.x;
index = i - 1;
} else {
axisType = getTypeOfAxis(lineChartData![linenumber].data[0].x, true) as XAxisTypes;
let x0;
let point0;
let point1;
switch (axisType) {
case XAxisTypes.DateAxis:
x0 = new Date(xOffset).getTime();
point0 = (d0.x as Date).getTime();
point1 = (d1.x as Date).getTime();
xPointToHighlight = Math.abs(x0 - point0) > Math.abs(x0 - point1) ? d1.x : d0.x;
index = Math.abs(x0 - point0) > Math.abs(x0 - point1) ? i : i - 1;
break;
case XAxisTypes.NumericAxis:
x0 = xOffset as number;
point0 = d0.x as number;
point1 = d1.x as number;
xPointToHighlight = Math.abs(x0 - point0) > Math.abs(x0 - point1) ? d1.x : d0.x;
index = Math.abs(x0 - point0) > Math.abs(x0 - point1) ? i : i - 1;
break;
default:
break;
}
}
const { xAxisCalloutData, xAxisCalloutAccessibilityData } = lineChartData![linenumber].data[index as number];
const formattedDate = xPointToHighlight instanceof Date ? xPointToHighlight.toLocaleString() : xPointToHighlight;
const modifiedXVal = xPointToHighlight instanceof Date ? xPointToHighlight.getTime() : xPointToHighlight;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const found: any = find(this._calloutPoints, (element: { x: string | number }) => {
return element.x === modifiedXVal;
});
const pointToHighlight: ILineChartDataPoint = lineChartData![linenumber].data[index!];
const pointToHighlightUpdated =
this.state.nearestCircleToHighlight === null ||
(this.state.nearestCircleToHighlight !== null &&
pointToHighlight !== null &&
(this.state.nearestCircleToHighlight.x !== pointToHighlight.x ||
this.state.nearestCircleToHighlight.y !== pointToHighlight.y));
// if no points need to be called out then don't show vertical line and callout card
Iif (found && pointToHighlightUpdated) {
this._uniqueCallOutID = `#${this._staticHighlightCircle}_${linenumber}`;
d3Select(`#${this._staticHighlightCircle}_${linenumber}`)
.attr('cx', `${this._xAxisScale(pointToHighlight.x)}`)
.attr('cy', `${this._yAxisScale(pointToHighlight.y)}`)
.attr('visibility', 'visibility');
d3Select(`#${this._verticalLine}`)
.attr(
'transform',
() => `translate(${this._xAxisScale(pointToHighlight.x)}, ${this._yAxisScale(pointToHighlight.y)})`,
)
.attr('visibility', 'visibility')
.attr('y2', `${lineHeight - this._yAxisScale(pointToHighlight.y)}`);
this.setState({
nearestCircleToHighlight: pointToHighlight,
isCalloutVisible: true,
refSelected: `#${this._staticHighlightCircle}_${linenumber}`,
stackCalloutProps: found!,
YValueHover: found.values,
dataPointCalloutProps: found!,
hoverXValue: xAxisCalloutData ? xAxisCalloutData : formattedDate,
xAxisCalloutAccessibilityData,
activePoint: '',
activeLine: linenumber,
});
}
Iif (!found) {
this.setState({
isCalloutVisible: false,
nearestCircleToHighlight: pointToHighlight,
activePoint: '',
activeLine: linenumber,
});
}
};
private _handleFocus = (
lineId: string,
x: number | Date,
xAxisCalloutData: string | undefined,
circleId: string,
xAxisCalloutAccessibilityData?: IAccessibilityProps,
) => {
this._uniqueCallOutID = circleId;
const formattedData = x instanceof Date ? x.toLocaleDateString() : x;
const xVal = x instanceof Date ? x.getTime() : x;
const found = find(this._calloutPoints, (element: { x: string | number }) => element.x === xVal);
// if no points need to be called out then don't show vertical line and callout card
if (found) {
const _this = this;
d3Select(`#${this._verticalLine}`)
.attr('transform', () => `translate(${_this._xAxisScale(x)}, 0)`)
.attr('visibility', 'visibility');
this._refArray.forEach((obj: IRefArrayData) => {
Iif (obj.index === lineId) {
this.setState({
isCalloutVisible: true,
refSelected: obj.refElement,
hoverXValue: xAxisCalloutData ? xAxisCalloutData : '' + formattedData,
YValueHover: found.values,
stackCalloutProps: found!,
dataPointCalloutProps: found!,
activePoint: circleId,
xAxisCalloutAccessibilityData,
});
}
});
} else {
this.setState({
activePoint: circleId,
});
}
};
private _handleHover = (
x: number | Date,
y: number | Date,
lineHeight: number,
xAxisCalloutData: string | undefined,
circleId: string,
xAxisCalloutAccessibilityData: IAccessibilityProps | undefined,
mouseEvent: React.MouseEvent<SVGElement>,
) => {
mouseEvent.persist();
const formattedData = x instanceof Date ? x.toLocaleDateString() : x;
const xVal = x instanceof Date ? x.getTime() : x;
const _this = this;
const found = find(this._calloutPoints, (element: { x: string | number }) => element.x === xVal);
// if no points need to be called out then don't show vertical line and callout card
if (found) {
d3Select(`#${this._verticalLine}`)
.attr('transform', () => `translate(${_this._xAxisScale(x)}, ${_this._yAxisScale(y)})`)
.attr('visibility', 'visibility')
.attr('y2', `${lineHeight - _this._yAxisScale(y)}`);
if (this._uniqueCallOutID !== circleId) {
this._uniqueCallOutID = circleId;
this.setState({
isCalloutVisible: true,
refSelected: `#${circleId}`,
hoverXValue: xAxisCalloutData ? xAxisCalloutData : '' + formattedData,
YValueHover: found.values,
stackCalloutProps: found!,
dataPointCalloutProps: found!,
activePoint: circleId,
xAxisCalloutAccessibilityData,
nearestCircleToHighlight: null,
activeLine: null,
});
}
} else E{
this.setState({
activePoint: circleId,
nearestCircleToHighlight: null,
activeLine: null,
});
}
};
/**
* Screen readers announce an element as clickable if the onClick attribute is set.
* This function sets the attribute only when a click event handler is provided.
*/
private _getClickHandler = (func?: () => void): { onClick?: () => void } => {
Iif (func) {
return {
onClick: func,
};
}
return {};
};
private _handleMouseOut = () => {
d3Select(`#${this._verticalLine}`).attr('visibility', 'hidden');
};
private _handleChartMouseLeave = () => {
this._uniqueCallOutID = null;
this.setState({
isCalloutVisible: false,
activePoint: '',
activeLine: null,
});
};
private _handleLegendClick = (
lineChartItem: LineChartDataWithIndex | IColorFillBarsProps,
selectedLegend: string | null | string[],
): void => {
Iif (lineChartItem.onLegendClick) {
lineChartItem.onLegendClick(selectedLegend);
}
};
private _handleMultipleLineLegendSelectionAction = (selectedLine: LineChartDataWithIndex) => {
const selectedLineIndex = this.state.selectedLegendPoints.reduce((acc, line, index) => {
if (acc > -1 || line.legend !== selectedLine.legend) {
return acc;
} else E{
return index;
}
}, -1);
let selectedLines: LineChartDataWithIndex[];
if (selectedLineIndex === -1) {
selectedLines = [...this.state.selectedLegendPoints, selectedLine];
} else E{
selectedLines = this.state.selectedLegendPoints
.slice(0, selectedLineIndex)
.concat(this.state.selectedLegendPoints.slice(selectedLineIndex + 1));
}
const areAllLineLegendsSelected = this.props.data && selectedLines.length === this.props.data.lineChartData!.length;
Iif (
areAllLineLegendsSelected &&
((this.props.colorFillBars && this.props.colorFillBars.length === this.state.selectedColorBarLegend.length) ||
!this.props.colorFillBars)
) {
// Clear all legends if all legends including color fill bar legends are selected
// Or clear all legends if all legends are selected and there are no color fill bars
this._clearMultipleLegendSelections();
} else Iif (!selectedLines.length && !this.state.selectedColorBarLegend.length) {
// Clear all legends if no legends including color fill bar legends are selected
this._clearMultipleLegendSelections();
} else {
// Otherwise, set state when one or more legends are selected, including color fill bar legends
this.setState({
selectedLegendPoints: selectedLines,
isSelectedLegend: true,
});
}
const selectedLegendTitlesToPass = selectedLines.map((line: LineChartDataWithIndex) => line.legend);
this._handleLegendClick(selectedLine, selectedLegendTitlesToPass);
};
private _handleMultipleColorFillBarLegendSelectionAction = (selectedColorFillBar: IColorFillBarsProps) => {
const selectedColorFillBarIndex = this.state.selectedColorBarLegend.reduce((acc, colorFillBar, index) => {
if (acc > -1 || colorFillBar.legend !== selectedColorFillBar.legend) {
return acc;
} else E{
return index;
}
}, -1);
let selectedColorFillBars: IColorFillBarsProps[];
if (selectedColorFillBarIndex === -1) {
selectedColorFillBars = [...this.state.selectedColorBarLegend, selectedColorFillBar];
} else E{
selectedColorFillBars = this.state.selectedColorBarLegend
.slice(0, selectedColorFillBarIndex)
.concat(this.state.selectedColorBarLegend.slice(selectedColorFillBarIndex + 1));
}
const areAllColorFillBarLegendsSelected =
selectedColorFillBars.length === (this.props.colorFillBars && this.props.colorFillBars!.length);
Iif (
areAllColorFillBarLegendsSelected &&
((this.props.data && this.props.data.lineChartData!.length === this.state.selectedLegendPoints.length) ||
!this.props.data)
) {
// Clear all legends if all legends, including line legends, are selected
// Or clear all legends if all legends are selected and there is no line data
this._clearMultipleLegendSelections();
} else Iif (!selectedColorFillBars.length && !this.state.selectedLegendPoints.length) {
// Clear all legends if no legends are selected, including line legends
this._clearMultipleLegendSelections();
} else {
// set state when one or more legends are selected, including line legends
this.setState({
selectedColorBarLegend: selectedColorFillBars,
isSelectedLegend: true,
});
}
const selectedLegendTitlesToPass = selectedColorFillBars.map(
(colorFillBar: IColorFillBarsProps) => colorFillBar.legend,
);
this._handleLegendClick(selectedColorFillBar, selectedLegendTitlesToPass);
};
private _clearMultipleLegendSelections = () => {
this.setState({
selectedColorBarLegend: [],
selectedLegendPoints: [],
isSelectedLegend: 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 = (legend: string) => {
return (
this.state.selectedLegend === legend || (this.state.selectedLegend === '' && this.state.activeLegend === legend)
);
};
/**
* This function checks if none of the legends is selected or hovered.
*/
private _noLegendHighlighted = () => {
return this.state.selectedLegend === '' && this.state.activeLegend === '';
};
private _getColorFillBarOpacity = (colorFillBar: IColorFillBarsProps) => {
return colorFillBar.applyPattern ? 1 : 0.4;
};
private _getAriaLabel = (lineIndex: number, pointIndex: number): string => {
const line = this._points[lineIndex];
const point = line.data[pointIndex];
const formattedDate = point.x instanceof Date ? point.x.toLocaleString() : point.x;
const xValue = point.xAxisCalloutData || formattedDate;
const legend = line.legend;
const yValue = point.yAxisCalloutData || point.y;
return point.callOutAccessibilityData?.ariaLabel || `${xValue}. ${legend}, ${yValue}.`;
};
private _isChartEmpty(): boolean {
return !(
this.props.data &&
this.props.data.lineChartData &&
this.props.data.lineChartData.length > 0 &&
this.props.data.lineChartData.filter((item: ILineChartPoints) => item.data.length).length > 0
);
}
}
|