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import { select } from "d3-selection"
import {
min,
max,
maxBy,
sortBy,
exposeInstanceOnWindow,
uniq,
flatten,
} from "../../clientUtils/Util"
import { computed } from "mobx"
import { observer } from "mobx-react"
import { Bounds, DEFAULT_BOUNDS } from "../../clientUtils/Bounds"
import {
ScaleType,
BASE_FONT_SIZE,
SeriesStrategy,
} from "../core/GrapherConstants"
import {
HorizontalAxisComponent,
HorizontalAxisGridLines,
} from "../axis/AxisViews"
import { NoDataModal } from "../noDataModal/NoDataModal"
import { AxisConfig, FontSizeManager } from "../axis/AxisConfig"
import { ColorSchemes } from "../color/ColorSchemes"
import { ChartInterface } from "../chart/ChartInterface"
import {
BACKGROUND_COLOR,
DEFAULT_BAR_COLOR,
DiscreteBarChartManager,
DiscreteBarSeries,
} from "./DiscreteBarChartConstants"
import { OwidTable } from "../../coreTable/OwidTable"
import {
autoDetectSeriesStrategy,
autoDetectYColumnSlugs,
makeSelectionArray,
} from "../chart/ChartUtils"
import { HorizontalAxis } from "../axis/Axis"
import { SelectionArray } from "../selection/SelectionArray"
import { CoreColumn } from "../../coreTable/CoreTableColumns"
import { ColorScheme } from "../color/ColorScheme"
import {
Time,
SortOrder,
SortBy,
SortConfig,
Color,
HorizontalAlign,
} from "../../clientUtils/owidTypes"
import { CategoricalColorAssigner } from "../color/CategoricalColorAssigner"
import { ColorScale, ColorScaleManager } from "../color/ColorScale"
import {
ColorScaleConfig,
ColorScaleConfigInterface,
} from "../color/ColorScaleConfig"
import { ColorSchemeName } from "../color/ColorConstants"
import { darkenColorForLine } from "../color/ColorUtils"
import { CoreValueType } from "../../coreTable/CoreTableConstants"
import { isNotErrorValue } from "../../coreTable/ErrorValues"
import {
CategoricalBin,
ColorScaleBin,
NumericBin,
} from "../color/ColorScaleBin"
import { HorizontalNumericColorLegend } from "../horizontalColorLegend/HorizontalColorLegends"
const labelToTextPadding = 10
const labelToBarPadding = 5
const LEGEND_PADDING = 25
interface DiscreteBarItem {
seriesName: string
value: number
time: number
colorValue?: CoreValueType
color?: Color
}
@observer
export class DiscreteBarChart
extends React.Component<{
bounds?: Bounds
manager: DiscreteBarChartManager
}>
implements ChartInterface, FontSizeManager, ColorScaleManager
{
base: React.RefObject<SVGGElement> = React.createRef()
transformTable(table: OwidTable): OwidTable {
if (!this.yColumnSlugs.length) return table
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)
if (this.isLogScale)
table = table.replaceNonPositiveCellsForLogScale(this.yColumnSlugs)
table = table.dropRowsWithErrorValuesForAllColumns(this.yColumnSlugs)
this.yColumnSlugs.forEach((slug) => {
table = table.interpolateColumnWithTolerance(slug)
})
if (this.colorColumnSlug) {
table = table
// TODO: remove this filter once we don't have mixed type columns in datasets
// Currently we set skipParsing=true on these columns to be backwards-compatible
.replaceNonNumericCellsWithErrorValues([this.colorColumnSlug])
.interpolateColumnWithTolerance(this.colorColumnSlug)
}
return table
}
@computed get inputTable(): OwidTable {
return this.manager.table
}
@computed get transformedTable(): OwidTable {
return (
this.manager.transformedTable ??
this.transformTable(this.inputTable)
)
}
@computed private get manager(): DiscreteBarChartManager {
return this.props.manager
}
@computed private get targetTime(): Time | undefined {
return this.manager.endTime
}
@computed private get isLogScale(): boolean {
return this.yAxisConfig.scaleType === ScaleType.log
}
@computed private get bounds(): Bounds {
return (this.props.bounds ?? DEFAULT_BOUNDS).padRight(10)
}
@computed private get boundsWithoutColorLegend(): Bounds {
return this.bounds.padTop(
this.hasColorLegend ? this.legendHeight + LEGEND_PADDING : 0
)
}
@computed get fontSize(): number {
return this.manager.baseFontSize ?? BASE_FONT_SIZE
}
@computed private get legendLabelStyle(): {
fontSize: number
fontWeight: number
} {
return {
fontSize: 0.75 * this.fontSize,
fontWeight: 700,
}
}
@computed private get valueLabelStyle(): {
fontSize: number
fontWeight: number
} {
return {
fontSize: 0.75 * this.fontSize,
fontWeight: 400,
}
}
// Account for the width of the legend
@computed private get seriesLegendWidth(): number {
const labels = this.series.map((series) => series.seriesName)
const longestLabel = maxBy(labels, (d) => d.length)
return Bounds.forText(longestLabel, this.legendLabelStyle).width
}
@computed private get hasPositive(): boolean {
return this.series.some((d) => d.value >= 0)
}
@computed private get hasNegative(): boolean {
return this.series.some((d) => d.value < 0)
}
// The amount of space we need to allocate for bar end labels on the right
@computed private get rightValueLabelWidth(): number {
if (!this.hasPositive) return 0
const positiveLabels = this.series
.filter((d) => d.value >= 0)
.map((d) => this.formatValue(d))
const longestPositiveLabel = maxBy(positiveLabels, (l) => l.length)
return Bounds.forText(longestPositiveLabel, this.valueLabelStyle).width
}
// The amount of space we need to allocate for bar end labels on the left
// These are only present if there are negative values
// We pad this a little so it doesn't run directly up against the bar labels themselves
@computed private get leftValueLabelWidth(): number {
if (!this.hasNegative) return 0
const negativeLabels = this.series
.filter((d) => d.value < 0)
.map((d) => this.formatValue(d))
const longestNegativeLabel = maxBy(negativeLabels, (l) => l.length)
return (
Bounds.forText(longestNegativeLabel, this.valueLabelStyle).width +
labelToTextPadding
)
}
@computed private get x0(): number {
if (!this.isLogScale) return 0
const minValue = min(this.series.map((d) => d.value))
return minValue !== undefined ? Math.min(1, minValue) : 1
}
// Now we can work out the main x axis scale
@computed private get xDomainDefault(): [number, number] {
const allValues = this.series.map((d) => d.value)
return [
Math.min(this.x0, min(allValues) as number),
Math.max(this.x0, max(allValues) as number),
]
}
@computed private get xRange(): [number, number] {
return [
this.boundsWithoutColorLegend.left +
this.seriesLegendWidth +
this.leftValueLabelWidth,
this.boundsWithoutColorLegend.right - this.rightValueLabelWidth,
]
}
@computed private get yAxisConfig(): AxisConfig {
return new AxisConfig(this.manager.yAxisConfig, this)
}
@computed get yAxis(): HorizontalAxis {
// NB: We use the user's YAxis options here to make the XAxis
const axis = this.yAxisConfig.toHorizontalAxis()
axis.updateDomainPreservingUserSettings(this.xDomainDefault)
axis.formatColumn = this.yColumns[0] // todo: does this work for columns as series?
axis.range = this.xRange
axis.label = ""
return axis
}
@computed private get innerBounds(): Bounds {
return this.boundsWithoutColorLegend
.padLeft(this.seriesLegendWidth + this.leftValueLabelWidth)
.padBottom(this.yAxis.height)
.padRight(this.rightValueLabelWidth)
}
@computed private get selectionArray(): SelectionArray {
return makeSelectionArray(this.manager)
}
// Leave space for extra bar at bottom to show "Add country" button
@computed private get barCount(): number {
return this.series.length
}
@computed private get barHeight(): number {
return (0.8 * this.innerBounds.height) / this.barCount
}
@computed private get barSpacing(): number {
return this.innerBounds.height / this.barCount - this.barHeight
}
@computed private get barPlacements(): { x: number; width: number }[] {
const { series, yAxis } = this
return series.map((d) => {
const isNegative = d.value < 0
const barX = isNegative
? yAxis.place(d.value)
: yAxis.place(this.x0)
const barWidth = isNegative
? yAxis.place(this.x0) - barX
: yAxis.place(d.value) - barX
return { x: barX, width: barWidth }
})
}
@computed private get barWidths(): number[] {
return this.barPlacements.map((b) => b.width)
}
private d3Bars() {
return select(this.base.current).selectAll("g.bar > rect")
}
private animateBarWidth(): void {
this.d3Bars()
.transition()
.attr("width", (_, i) => this.barWidths[i])
}
componentDidMount(): void {
this.d3Bars().attr("width", 0)
this.animateBarWidth()
exposeInstanceOnWindow(this)
}
componentDidUpdate(): void {
// Animating the bar width after a render ensures there's no race condition, where the
// initial animation (in componentDidMount) did override the now-changed bar width in
// some cases. Updating the animation with the updated bar widths fixes that.
this.animateBarWidth()
}
render(): JSX.Element {
if (this.failMessage)
return (
<NoDataModal
manager={this.manager}
bounds={this.bounds}
message={this.failMessage}
/>
)
const {
series,
boundsWithoutColorLegend,
yAxis,
innerBounds,
barHeight,
barSpacing,
} = this
let yOffset = innerBounds.top + barHeight / 2
return (
<g ref={this.base} className="DiscreteBarChart">
<rect
x={boundsWithoutColorLegend.left}
y={boundsWithoutColorLegend.top}
width={boundsWithoutColorLegend.width}
height={boundsWithoutColorLegend.height}
opacity={0}
fill="rgba(255,255,255,0)"
/>
{this.hasColorLegend && (
<HorizontalNumericColorLegend manager={this} />
)}
<HorizontalAxisComponent
bounds={boundsWithoutColorLegend}
axis={yAxis}
preferredAxisPosition={innerBounds.bottom}
/>
<HorizontalAxisGridLines
horizontalAxis={yAxis}
bounds={innerBounds}
/>
{series.map((series) => {
// Todo: add a "placedSeries" getter to get the transformed series, then just loop over the placedSeries and render a bar for each
const isNegative = series.value < 0
const barX = isNegative
? yAxis.place(series.value)
: yAxis.place(this.x0)
const barWidth = isNegative
? yAxis.place(this.x0) - barX
: yAxis.place(series.value) - barX
const barColor = series.color
const valueLabel = this.formatValue(series)
const labelX = isNegative
? barX -
Bounds.forText(valueLabel, this.valueLabelStyle)
.width -
labelToTextPadding
: barX - labelToBarPadding
// Using transforms for positioning to enable better (subpixel) transitions
// Width transitions don't work well on iOS Safari – they get interrupted and
// it appears very slow. Also be careful with negative bar charts.
const result = (
<g
key={series.seriesName}
className="bar"
transform={`translate(0, ${yOffset})`}
>
<text
x={0}
y={0}
transform={`translate(${labelX}, 0)`}
fill="#555"
dominantBaseline="middle"
textAnchor="end"
{...this.legendLabelStyle}
>
{series.seriesName}
</text>
<rect
x={0}
y={0}
transform={`translate(${barX}, ${
-barHeight / 2
})`}
width={barWidth}
height={barHeight}
fill={barColor}
opacity={0.85}
style={{ transition: "height 200ms ease" }}
/>
<text
x={0}
y={0}
transform={`translate(${
yAxis.place(series.value) +
(isNegative
? -labelToBarPadding
: labelToBarPadding)
}, 0)`}
fill="#666"
dominantBaseline="middle"
textAnchor={isNegative ? "end" : "start"}
{...this.valueLabelStyle}
>
{valueLabel}
</text>
</g>
)
yOffset += barHeight + barSpacing
return result
})}
</g>
)
}
@computed get failMessage(): string {
const column = this.yColumns[0]
if (!column) return "No column to chart"
if (!this.selectionArray.hasSelection) return `No data selected`
// TODO is it better to use .series for this check?
return this.yColumns.every((col) => col.isEmpty)
? `No matching data in columns ${this.yColumnSlugs.join(", ")}`
: ""
}
formatValue(series: DiscreteBarSeries): string {
const column = this.yColumns[0] // todo: do we need to use the right column here?
const { transformedTable } = this
const showYearLabels =
this.manager.showYearLabels || series.time !== this.targetTime
const displayValue = column.formatValueShort(series.value)
return (
displayValue +
(showYearLabels
? ` (${transformedTable.timeColumnFormatFunction(series.time)})`
: "")
)
}
@computed private get yColumnSlugs(): string[] {
return autoDetectYColumnSlugs(this.manager)
}
@computed private get colorColumnSlug(): string | undefined {
return this.manager.colorColumnSlug
}
@computed private get colorColumn(): CoreColumn {
return this.transformedTable.get(this.colorColumnSlug)
}
@computed private get seriesStrategy(): SeriesStrategy {
const autoStrategy = autoDetectSeriesStrategy(this.manager, true)
// TODO this is an inconsistency between LineChart and DiscreteBar.
// We should probably make it consistent at some point.
if (
autoStrategy === SeriesStrategy.column &&
this.selectionArray.numSelectedEntities > 1
) {
return SeriesStrategy.entity
}
return autoStrategy
}
@computed protected get yColumns(): CoreColumn[] {
return this.transformedTable.getColumns(this.yColumnSlugs)
}
constructSeries(col: CoreColumn, indexes: number[]): DiscreteBarItem[] {
const { transformedTable, colorColumn, hasColorScale } = this
const values = col.valuesIncludingErrorValues
const originalTimes = col.originalTimeColumn.valuesIncludingErrorValues
const entityNames =
transformedTable.entityNameColumn.valuesIncludingErrorValues
const colorValues = colorColumn.valuesIncludingErrorValues
return indexes.map((index): DiscreteBarItem => {
const isColumnStrategy =
this.seriesStrategy === SeriesStrategy.column
const seriesName = isColumnStrategy
? col.displayName
: (entityNames[index] as string)
const colorValue = isNotErrorValue(colorValues[index])
? colorValues[index]
: undefined
const color = hasColorScale
? this.colorScale.getColor(colorValue)
: isColumnStrategy
? col.def.color
: transformedTable.getColorForEntityName(
entityNames[index] as string
)
return {
seriesName,
value: values[index] as number,
time: originalTimes[index] as number,
colorValue,
color,
}
})
}
@computed private get columnsAsSeries(): DiscreteBarItem[] {
return flatten(
this.yColumns.map((col) =>
this.constructSeries(col, col.validRowIndices.slice(0, 1))
)
)
}
@computed private get entitiesAsSeries(): DiscreteBarItem[] {
const col = this.yColumns[0]
return this.constructSeries(col, col.validRowIndices)
}
@computed get sortConfig(): SortConfig {
return this.manager.sortConfig ?? {}
}
@computed private get sortedRawSeries(): DiscreteBarItem[] {
const raw =
this.seriesStrategy === SeriesStrategy.entity
? this.entitiesAsSeries
: this.columnsAsSeries
let sortByFunc: (item: DiscreteBarItem) => number | string
switch (this.sortConfig.sortBy) {
case SortBy.entityName:
sortByFunc = (item: DiscreteBarItem) => item.seriesName
break
default:
case SortBy.total:
case SortBy.column: // we only have one yColumn, so total and column are the same
sortByFunc = (item: DiscreteBarItem) => item.value
break
}
const sortedSeries = sortBy(raw, sortByFunc)
const sortOrder = this.sortConfig.sortOrder ?? SortOrder.desc
if (sortOrder === SortOrder.desc) sortedSeries.reverse()
return sortedSeries
}
@computed private get colorScheme(): ColorScheme | undefined {
// If this DiscreteBarChart stems from a LineChart, we want to match its (default) color
// scheme OWID Distinct. Otherwise, use an all-blue color scheme (`undefined`) as default.
const defaultColorScheme = this.manager.isLineChart
? ColorSchemes["owid-distinct"]
: undefined
return (
(this.manager.baseColorScheme
? ColorSchemes[this.manager.baseColorScheme]
: undefined) ?? defaultColorScheme
)
}
@computed private get valuesToColorsMap(): Map<number, string> | undefined {
const { manager, colorScheme, sortedRawSeries } = this
return colorScheme?.getUniqValueColorMap(
uniq(sortedRawSeries.map((series) => series.value)),
!manager.invertColorScheme // negate here to be consistent with how things worked before
)
}
// Only used if it's a LineChart turned into DiscreteBar due to single-point timeline
@computed private get categoricalColorAssigner():
| CategoricalColorAssigner
| undefined {
if (!this.colorScheme) return undefined
return new CategoricalColorAssigner({
colorScheme: this.colorScheme,
invertColorScheme: this.manager.invertColorScheme,
colorMap:
this.seriesStrategy === SeriesStrategy.entity
? this.inputTable.entityNameColorIndex
: this.inputTable.columnDisplayNameToColorMap,
autoColorMapCache: this.manager.seriesColorMap,
})
}
@computed private get hasColorScale(): boolean {
return !this.colorColumn.isMissing
}
// Color scale props
@computed get colorScaleColumn(): CoreColumn {
return (
// For faceted charts, we have to get the values of inputTable before it's filtered by
// the faceting logic.
this.manager.colorScaleColumnOverride ??
// We need to use inputTable in order to get consistent coloring for a variable across
// charts, e.g. each continent being assigned to the same color.
// inputTable is unfiltered, so it contains every value that exists in the variable.
this.inputTable.get(this.colorColumnSlug)
)
}
@computed get colorScaleConfig(): ColorScaleConfigInterface | undefined {
return (
ColorScaleConfig.fromDSL(this.colorColumn.def) ??
this.manager.colorScale
)
}
@computed get hasNoDataBin(): boolean {
if (!this.hasColorScale) return false
return this.colorColumn.valuesIncludingErrorValues.some(
(value) => !isNotErrorValue(value)
)
}
defaultBaseColorScheme = ColorSchemeName.YlGnBu
defaultNoDataColor = "#959595"
transformColor = darkenColorForLine
colorScale = new ColorScale(this)
// End of color scale props
// Color legend props
@computed get hasColorLegend(): boolean {
return this.hasColorScale && !this.manager.hideLegend
}
@computed get legendX(): number {
return this.bounds.x
}
@computed get legendMaxWidth(): number {
return this.bounds.width
}
@computed get legendAlign(): HorizontalAlign {
return HorizontalAlign.center
}
// TODO just pass colorScale to legend and let it figure it out?
@computed get numericLegendData(): ColorScaleBin[] {
// Move CategoricalBins to end
return sortBy(
this.colorScale.legendBins,
(bin) => bin instanceof CategoricalBin
)
}
// TODO just pass colorScale to legend and let it figure it out?
@computed get equalSizeBins(): boolean | undefined {
return this.colorScale.config.equalSizeBins
}
numericBinSize = 10
numericBinStroke = BACKGROUND_COLOR
numericBinStrokeWidth = 1
legendTextColor = "#555"
legendTickSize = 1
@computed get numericLegend(): HorizontalNumericColorLegend | undefined {
return this.hasColorScale && !this.manager.hideLegend
? new HorizontalNumericColorLegend({ manager: this })
: undefined
}
@computed get numericLegendY(): number {
return this.bounds.top
}
@computed get legendTitle(): string | undefined {
return this.hasColorScale
? this.colorScale.legendDescription
: undefined
}
@computed get legendHeight(): number {
return this.numericLegend?.height ?? 0
}
// End of color legend props
@computed get series(): DiscreteBarSeries[] {
const { manager } = this
const series = this.sortedRawSeries.map((rawSeries) => {
const { value, time, colorValue, seriesName, color } = rawSeries
const series: DiscreteBarSeries = {
value,
time,
colorValue,
seriesName,
color:
color ??
this.valuesToColorsMap?.get(value) ??
DEFAULT_BAR_COLOR,
}
return series
})
if (
manager.isLineChart &&
!this.hasColorScale &&
this.categoricalColorAssigner
) {
// For LineChart-based bar charts, we want to assign colors from the color scheme.
// This way we get consistent between the DiscreteBarChart and the LineChart (by using the same logic).
series.forEach((s) => {
s.color = this.categoricalColorAssigner!.assign(s.seriesName)
})
}
return series
}
}
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