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import { AxisConfig, FontSizeManager } from "../axis/AxisConfig"
import { ChartInterface } from "../chart/ChartInterface"
import { ChartManager } from "../chart/ChartManager"
import {
BASE_FONT_SIZE,
SeriesName,
SeriesStrategy,
} from "../core/GrapherConstants"
import { Bounds, DEFAULT_BOUNDS } from "../../clientUtils/Bounds"
import {
exposeInstanceOnWindow,
flatten,
guid,
max,
} from "../../clientUtils/Util"
import { computed } from "mobx"
import { observer } from "mobx-react"
import React from "react"
import {
StackedPoint,
StackedRawSeries,
StackedSeries,
} from "./StackedConstants"
import { OwidTable } from "../../coreTable/OwidTable"
import {
autoDetectSeriesStrategy,
autoDetectYColumnSlugs,
makeSelectionArray,
} from "../chart/ChartUtils"
import { ScaleOrdinal, scaleOrdinal } from "d3-scale"
import { easeLinear } from "d3-ease"
import { select } from "d3-selection"
import { ColorSchemes } from "../color/ColorSchemes"
import { CoreColumn } from "../../coreTable/CoreTableColumns"
import { SelectionArray } from "../selection/SelectionArray"
import { CategoricalBin } from "../color/ColorScaleBin"
import { HorizontalColorLegendManager } from "../horizontalColorLegend/HorizontalColorLegends"
export interface AbstactStackedChartProps {
bounds?: Bounds
manager: ChartManager
disableLinearInterpolation?: boolean // just for testing
}
@observer
export class AbstactStackedChart
extends React.Component<AbstactStackedChartProps>
implements ChartInterface, FontSizeManager
{
transformTable(table: OwidTable): OwidTable {
table = table.filterByEntityNames(
this.selectionArray.selectedEntityNames
)
// TODO: remove this filter once we don't have mixed type columns in datasets
table = table
.replaceNonNumericCellsWithErrorValues(this.yColumnSlugs)
.dropRowsWithErrorValuesForAllColumns(this.yColumnSlugs)
if (!this.props.disableLinearInterpolation) {
this.yColumnSlugs.forEach((slug) => {
table = table.interpolateColumnLinearly(slug)
})
}
// Drop rows for which no valid data points exist for any display column
// after interpolation, which most likely means they lie at the start/end
// of the time range and were not extrapolated
table = table.dropRowsWithErrorValuesForAnyColumn(this.yColumnSlugs)
if (this.manager.isRelativeMode) {
table = this.isEntitySeries
? table.toPercentageFromEachEntityForEachTime(
this.yColumnSlugs[0]
)
: table.toPercentageFromEachColumnForEachEntityAndTime(
this.yColumnSlugs
)
}
return table
}
@computed get inputTable(): OwidTable {
return this.manager.table
}
@computed get transformedTable(): OwidTable {
return (
this.manager.transformedTable ??
this.transformTable(this.inputTable)
)
}
@computed get manager(): ChartManager {
return this.props.manager
}
@computed get bounds(): Bounds {
return this.props.bounds ?? DEFAULT_BOUNDS
}
@computed get fontSize(): number {
return this.manager.baseFontSize ?? BASE_FONT_SIZE
}
protected get paddingForLegend(): number {
return 0
}
@computed get renderUid(): number {
return guid()
}
@computed protected get yColumns(): CoreColumn[] {
return this.transformedTable.getColumns(this.yColumnSlugs)
}
@computed protected get yColumnSlugs(): string[] {
return (
this.manager.yColumnSlugsInSelectionOrder ??
autoDetectYColumnSlugs(this.manager)
)
}
private animSelection?: d3.Selection<
d3.BaseType,
unknown,
SVGGElement | null,
unknown
>
base: React.RefObject<SVGGElement> = React.createRef()
componentDidMount(): void {
// Fancy intro animation
this.animSelection = select(this.base.current)
.selectAll("clipPath > rect")
.attr("width", 0)
this.animSelection
.transition()
.duration(800)
.ease(easeLinear)
.attr("width", this.bounds.width)
.on("end", () => this.forceUpdate()) // Important in case bounds changes during transition
exposeInstanceOnWindow(this)
}
componentWillUnmount(): void {
if (this.animSelection) this.animSelection.interrupt()
}
@computed get seriesStrategy(): SeriesStrategy {
return autoDetectSeriesStrategy(this.manager)
}
@computed protected get dualAxis(): DualAxis {
const {
bounds,
horizontalAxisPart,
verticalAxisPart,
paddingForLegend,
} = this
return new DualAxis({
bounds: bounds.padRight(paddingForLegend),
horizontalAxis: horizontalAxisPart,
verticalAxis: verticalAxisPart,
})
}
@computed get yAxis(): VerticalAxis {
return this.dualAxis.verticalAxis
}
@computed get xAxis(): HorizontalAxis {
return this.dualAxis.horizontalAxis
}
@computed private get xAxisConfig(): AxisConfig {
return new AxisConfig(this.manager.xAxisConfig, this)
}
@computed private get horizontalAxisPart(): HorizontalAxis {
const axis = this.xAxisConfig.toHorizontalAxis()
axis.updateDomainPreservingUserSettings(
this.transformedTable.timeDomainFor(this.yColumnSlugs)
)
axis.formatColumn = this.inputTable.timeColumn
axis.hideFractionalTicks = true
axis.hideGridlines = true
return axis
}
@computed private get yAxisConfig(): AxisConfig {
// TODO: enable nice axis ticks for linear scales
return new AxisConfig(this.manager.yAxisConfig, this)
}
@computed private get verticalAxisPart(): VerticalAxis {
// const lastSeries = this.series[this.series.length - 1]
// const yValues = lastSeries.points.map((d) => d.yOffset + d.y)
const yValues = this.allStackedPoints.map(
(point) => point.value + point.valueOffset
)
const axis = this.yAxisConfig.toVerticalAxis()
// Use user settings for axis, unless relative mode
if (this.manager.isRelativeMode) axis.domain = [0, 100]
else axis.updateDomainPreservingUserSettings([0, max(yValues) ?? 100]) // Stacked area chart must have its own y domain)
axis.formatColumn = this.yColumns[0]
return axis
}
@computed
private get columnsAsSeries(): readonly StackedRawSeries<number>[] {
return this.yColumns
.map((col) => {
return {
isProjection: col.isProjection,
seriesName: col.displayName,
rows: col.owidRows,
}
})
.reverse() // For stacked charts, we want the first selected series to be on top, so we reverse the order of the stacks.
}
@computed
private get entitiesAsSeries(): readonly StackedRawSeries<number>[] {
const { isProjection, owidRowsByEntityName } = this.yColumns[0]
return this.selectionArray.selectedEntityNames
.map((seriesName) => {
return {
isProjection,
seriesName,
rows: owidRowsByEntityName.get(seriesName) || [],
}
})
.reverse() // For stacked charts, we want the first selected series to be on top, so we reverse the order of the stacks.
}
@computed
protected get rawSeries(): readonly StackedRawSeries<number>[] {
return this.isEntitySeries
? this.entitiesAsSeries
: this.columnsAsSeries
}
@computed
protected get allStackedPoints(): readonly StackedPoint<number>[] {
return flatten(this.series.map((series) => series.points))
}
@computed get failMessage(): string {
const { yColumnSlugs } = this
if (!yColumnSlugs.length) return "Missing variable"
if (!this.series.length) return "No matching data"
if (!this.allStackedPoints.length) return "No matching points"
return ""
}
@computed private get colorScheme(): ScaleOrdinal<string, string> {
const scheme =
(this.manager.baseColorScheme
? ColorSchemes[this.manager.baseColorScheme]
: null) ?? ColorSchemes.stackedAreaDefault
const seriesCount = this.isEntitySeries
? this.selectionArray.numSelectedEntities
: this.yColumns.length
const baseColors = scheme.getColors(seriesCount)
if (this.manager.invertColorScheme) baseColors.reverse()
return scaleOrdinal(baseColors)
}
getColorForSeries(seriesName: SeriesName): string {
const table = this.transformedTable
const color = this.isEntitySeries
? table.getColorForEntityName(seriesName)
: table.getColorForColumnByDisplayName(seriesName)
return color ?? this.colorScheme(seriesName) ?? "#ddd"
}
@computed protected get selectionArray(): SelectionArray {
return makeSelectionArray(this.manager)
}
@computed get isEntitySeries(): boolean {
return this.seriesStrategy === SeriesStrategy.entity
}
@computed get seriesColors(): string[] {
return this.series.map((series) => series.color)
}
/** Whether we want to display series with only zeroes. Defaults to true but e.g. StackedArea charts want to set this to false */
get showAllZeroSeries(): boolean {
return true
}
@computed get unstackedSeries(): readonly StackedSeries<number>[] {
return this.rawSeries
.filter(
(series) =>
series.rows.length &&
(this.showAllZeroSeries ||
series.rows.some((row) => row.value !== 0))
)
.map((series) => {
const { isProjection, seriesName, rows } = series
return {
seriesName,
isProjection,
points: rows.map((row) => {
return {
position: row.time,
time: row.time,
value: row.value,
valueOffset: 0,
}
}),
color: this.getColorForSeries(seriesName),
}
}) as StackedSeries<number>[]
}
@computed get series(): readonly StackedSeries<number>[] {
return this.unstackedSeries
}
@computed get externalLegend(): HorizontalColorLegendManager | undefined {
if (this.manager.hideLegend) {
const categoricalLegendData = this.series
.map(
(series, index) =>
new CategoricalBin({
index,
value: series.seriesName,
label: series.seriesName,
color: series.color,
})
)
.reverse()
return { categoricalLegendData }
}
return undefined
}
}
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