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import {
reverse,
clone,
last,
pointsToPath,
getRelativeMouse,
makeSafeForCSS,
minBy,
excludeUndefined,
} from "../../clientUtils/Util"
import { computed, action, observable } from "mobx"
import { SeriesName } from "../core/GrapherConstants"
import { observer } from "mobx-react"
import { DualAxisComponent } from "../axis/AxisViews"
import { DualAxis } from "../axis/Axis"
import {
LineLabelSeries,
LineLegend,
LineLegendManager,
} from "../lineLegend/LineLegend"
import { NoDataModal } from "../noDataModal/NoDataModal"
import { Tooltip } from "../tooltip/Tooltip"
import { rgb } from "d3-color"
import {
AbstactStackedChart,
AbstactStackedChartProps,
} from "../stackedCharts/AbstractStackedChart"
import { StackedSeries } from "./StackedConstants"
import { stackSeries, withMissingValuesAsZeroes } from "./StackedUtils"
import { makeClipPath } from "../chart/ChartUtils"
import { Time } from "../../clientUtils/owidTypes"
interface AreasProps extends React.SVGAttributes<SVGGElement> {
dualAxis: DualAxis
seriesArr: readonly StackedSeries<Time>[]
focusedSeriesNames: SeriesName[]
onHover: (hoverIndex: number | undefined) => void
}
const BLUR_COLOR = "#ddd"
@observer
class Areas extends React.Component<AreasProps> {
base: React.RefObject<SVGGElement> = React.createRef()
@observable hoverIndex?: number
@action.bound private onCursorMove(
ev: React.MouseEvent<SVGGElement> | React.TouchEvent<SVGElement>
): void {
const { dualAxis, seriesArr } = this.props
if (this.base.current) {
const mouse = getRelativeMouse(this.base.current, ev.nativeEvent)
if (dualAxis.innerBounds.contains(mouse)) {
const closestPoint = minBy(seriesArr[0].points, (d) =>
Math.abs(
dualAxis.horizontalAxis.place(d.position) - mouse.x
)
)
if (closestPoint) {
const index = seriesArr[0].points.indexOf(closestPoint)
this.hoverIndex = index
} else {
this.hoverIndex = undefined
}
} else {
this.hoverIndex = undefined
}
this.props.onHover(this.hoverIndex)
}
}
@action.bound private onCursorLeave(): void {
this.hoverIndex = undefined
this.props.onHover(this.hoverIndex)
}
private seriesIsBlur(series: StackedSeries<Time>): boolean {
return (
this.props.focusedSeriesNames.length > 0 &&
!this.props.focusedSeriesNames.includes(series.seriesName)
)
}
@computed private get areas(): JSX.Element[] {
const { dualAxis, seriesArr } = this.props
const { horizontalAxis, verticalAxis } = dualAxis
const xBottomLeft = [horizontalAxis.range[0], verticalAxis.range[0]]
const xBottomRight = [horizontalAxis.range[1], verticalAxis.range[0]]
// Stacked area chart stacks each series upon the previous series, so we must keep track of the last point set we used
let prevPoints = [xBottomLeft, xBottomRight]
return seriesArr.map((series) => {
const mainPoints = series.points.map(
(point) =>
[
horizontalAxis.place(point.position),
verticalAxis.place(point.value + point.valueOffset),
] as [number, number]
)
const points = mainPoints.concat(reverse(clone(prevPoints)) as any)
prevPoints = mainPoints
return (
<path
className={makeSafeForCSS(series.seriesName) + "-area"}
key={series.seriesName + "-area"}
strokeLinecap="round"
d={pointsToPath(points)}
fill={this.seriesIsBlur(series) ? BLUR_COLOR : series.color}
fillOpacity={0.7}
clipPath={this.props.clipPath}
/>
)
})
}
@computed private get borders(): JSX.Element[] {
const { dualAxis, seriesArr } = this.props
const { horizontalAxis, verticalAxis } = dualAxis
// Stacked area chart stacks each series upon the previous series, so we must keep track of the last point set we used
return seriesArr.map((series) => {
const points = series.points.map(
(point) =>
[
horizontalAxis.place(point.position),
verticalAxis.place(point.value + point.valueOffset),
] as [number, number]
)
return (
<path
className={makeSafeForCSS(series.seriesName) + "-border"}
key={series.seriesName + "-border"}
strokeLinecap="round"
d={pointsToPath(points)}
stroke={rgb(
this.seriesIsBlur(series) ? BLUR_COLOR : series.color
)
.darker(0.5)
.toString()}
strokeOpacity={0.7}
strokeWidth={0.5}
fill="none"
clipPath={this.props.clipPath}
/>
)
})
}
render(): JSX.Element {
const { dualAxis, seriesArr } = this.props
const { horizontalAxis, verticalAxis } = dualAxis
const { hoverIndex } = this
return (
<g
ref={this.base}
className="Areas"
onMouseMove={this.onCursorMove}
onMouseLeave={this.onCursorLeave}
onTouchStart={this.onCursorMove}
onTouchMove={this.onCursorMove}
onTouchEnd={this.onCursorLeave}
onTouchCancel={this.onCursorLeave}
>
<rect
x={horizontalAxis.range[0]}
y={verticalAxis.range[1]}
width={horizontalAxis.range[1] - horizontalAxis.range[0]}
height={verticalAxis.range[0] - verticalAxis.range[1]}
opacity={0}
fill="rgba(255,255,255,0)"
/>
{this.areas}
{this.borders}
{hoverIndex !== undefined && (
<g className="hoverIndicator">
{seriesArr.map((series) => {
const point = series.points[hoverIndex]
return this.seriesIsBlur(series) ||
point.fake ? null : (
<circle
key={series.seriesName}
cx={horizontalAxis.place(point.position)}
cy={verticalAxis.place(
point.value + point.valueOffset
)}
r={2}
fill={series.color}
/>
)
})}
<line
x1={horizontalAxis.place(
seriesArr[0].points[hoverIndex].position
)}
y1={verticalAxis.range[0]}
x2={horizontalAxis.place(
seriesArr[0].points[hoverIndex].position
)}
y2={verticalAxis.range[1]}
stroke="rgba(180,180,180,.4)"
/>
</g>
)}
</g>
)
}
}
@observer
export class StackedAreaChart
extends AbstactStackedChart
implements LineLegendManager
{
constructor(props: AbstactStackedChartProps) {
super(props)
}
@computed get midpoints(): number[] {
let prevY = 0
return this.series.map((series) => {
const lastValue = last(series.points)
if (!lastValue) return 0
const y = lastValue.value + lastValue.valueOffset
const middleY = prevY + (y - prevY) / 2
prevY = y
return middleY
})
}
@computed get labelSeries(): LineLabelSeries[] {
const { midpoints } = this
return this.series
.map((series, index) => ({
color: series.color,
seriesName: series.seriesName,
label: series.seriesName,
yValue: midpoints[index],
}))
.reverse()
}
@computed get maxLineLegendWidth(): number {
return Math.min(150, this.bounds.width / 3)
}
@computed get legendDimensions(): LineLegend | undefined {
if (this.manager.hideLegend) return undefined
return new LineLegend({ manager: this })
}
@observable hoveredPointIndex?: number
@action.bound onHover(hoverIndex: number | undefined): void {
this.hoveredPointIndex = hoverIndex
}
@observable hoverSeriesName?: SeriesName
@action.bound onLineLegendClick(): void {
if (this.manager.startSelectingWhenLineClicked)
this.manager.isSelectingData = true
}
@computed protected get paddingForLegend(): number {
const { legendDimensions } = this
return legendDimensions ? legendDimensions.width : 20
}
@action.bound onLineLegendMouseOver(seriesName: SeriesName): void {
this.hoverSeriesName = seriesName
}
@action.bound onLineLegendMouseLeave(): void {
this.hoverSeriesName = undefined
}
@computed get focusedSeriesNames(): string[] {
const { externalLegendFocusBin } = this.manager
const focusedSeriesNames = excludeUndefined([
this.props.manager.annotation?.entityName,
this.hoverSeriesName,
])
if (externalLegendFocusBin) {
focusedSeriesNames.push(
...this.series
.map((s) => s.seriesName)
.filter((name) => externalLegendFocusBin.contains(name))
)
}
return focusedSeriesNames
}
@computed get isFocusMode(): boolean {
return this.focusedSeriesNames.length > 0
}
seriesIsBlur(series: StackedSeries<Time>): boolean {
return (
this.focusedSeriesNames.length > 0 &&
!this.focusedSeriesNames.includes(series.seriesName)
)
}
@computed private get tooltip(): JSX.Element | undefined {
if (this.hoveredPointIndex === undefined) return undefined
const { hoveredPointIndex, dualAxis, series } = this
// Grab the first value to get the year from
const bottomSeriesPoint = series[0].points[hoveredPointIndex]
// If some data is missing, don't calculate a total
const somePointsMissingForHoveredTime = series.some(
(series) => series.points[hoveredPointIndex].fake
)
const legendBlockStyle = {
width: "10px",
height: "10px",
display: "inline-block",
marginRight: "2px",
}
const lastStackedPoint = last(series)!.points[hoveredPointIndex]
const totalValue = lastStackedPoint.value + lastStackedPoint.valueOffset
const yColumn = this.yColumns[0] // Assumes same type for all columns.
return (
<Tooltip
tooltipManager={this.props.manager}
x={dualAxis.horizontalAxis.place(bottomSeriesPoint.position)}
y={
dualAxis.verticalAxis.rangeMin +
dualAxis.verticalAxis.rangeSize / 2
}
style={{ padding: "0.3em" }}
offsetX={5}
>
<table style={{ fontSize: "0.9em", lineHeight: "1.4em" }}>
<tbody>
<tr>
<td>
<strong>
{this.inputTable.timeColumnFormatFunction(
bottomSeriesPoint.position
)}
</strong>
</td>
<td></td>
</tr>
{series
.slice()
.reverse()
.map((series) => {
const point = series.points[hoveredPointIndex]
const isBlur = this.seriesIsBlur(series)
const textColor = isBlur ? "#ddd" : "#333"
const blockColor = isBlur
? BLUR_COLOR
: series.color
return (
<tr
key={series.seriesName}
style={{ color: textColor }}
>
<td
style={{
paddingRight: "0.8em",
fontSize: "0.9em",
}}
>
<div
style={{
...legendBlockStyle,
backgroundColor: blockColor,
}}
/>{" "}
{series.seriesName}
</td>
<td style={{ textAlign: "right" }}>
{point.fake
? "No data"
: yColumn.formatValueLong(
point.value
)}
</td>
</tr>
)
})}
{/* Total */}
{!somePointsMissingForHoveredTime && (
<tr>
<td style={{ fontSize: "0.9em" }}>
<div
style={{
...legendBlockStyle,
backgroundColor: "transparent",
}}
/>{" "}
<strong>Total</strong>
</td>
<td style={{ textAlign: "right" }}>
<span>
<strong>
{yColumn.formatValueLong(
totalValue
)}
</strong>
</span>
</td>
</tr>
)}
</tbody>
</table>
</Tooltip>
)
}
render(): JSX.Element {
if (this.failMessage)
return (
<NoDataModal
manager={this.manager}
bounds={this.props.bounds}
message={this.failMessage}
/>
)
const { bounds, dualAxis, renderUid, series } = this
const showLegend = !this.manager.hideLegend
const clipPath = makeClipPath(renderUid, {
...bounds,
height: bounds.height * 2,
x: dualAxis.innerBounds.x,
})
return (
<g ref={this.base} className="StackedArea">
{clipPath.element}
<DualAxisComponent dualAxis={dualAxis} showTickMarks={true} />
<g clipPath={clipPath.id}>
{showLegend && <LineLegend manager={this} />}
<Areas
dualAxis={dualAxis}
seriesArr={series}
focusedSeriesNames={this.focusedSeriesNames}
onHover={this.onHover}
/>
</g>
{this.tooltip}
</g>
)
}
/** Whether we want to display series with only zeroes (inherited). False for this class, true for others */
get showAllZeroSeries() {
return false
}
@computed get lineLegendX(): number {
return this.legendDimensions
? this.bounds.right - this.legendDimensions.width
: 0
}
@computed get series(): readonly StackedSeries<number>[] {
return stackSeries(withMissingValuesAsZeroes(this.unstackedSeries))
}
}
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