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import { select } from "d3-selection"
import { NoDataModal } from "../noDataModal/NoDataModal"
import { SortOrder } from "../../coreTable/CoreTableConstants"
import { Bounds } from "../../clientUtils/Bounds"
import { PointVector } from "../../clientUtils/PointVector"
import {
sortNumeric,
makeSafeForCSS,
getRelativeMouse,
intersection,
last,
flatten,
minBy,
min,
first,
isEmpty,
guid,
} from "../../clientUtils/Util"
import { computed, action } from "mobx"
import { observer } from "mobx-react"
import React from "react"
import { getElementWithHalo } from "./Halos"
import { MultiColorPolyline } from "./MultiColorPolyline"
import {
ScatterPointsWithLabelsProps,
ScatterRenderSeries,
ScatterLabel,
ScatterRenderPoint,
ScatterLabelFontFamily,
ScatterSeries,
} from "./ScatterPlotChartConstants"
import { ScatterLine, ScatterPoint } from "./ScatterPoints"
import {
makeStartLabel,
makeMidLabels,
makeEndLabel,
labelPriority,
} from "./ScatterUtils"
import { Triangle } from "./Triangle"
import { ColorScale } from "../color/ColorScale"
import { ScaleLinear } from "d3-scale"
// This is the component that actually renders the points. The higher level ScatterPlot class renders points, legends, comparison lines, etc.
@observer
export class ScatterPointsWithLabels extends React.Component<ScatterPointsWithLabelsProps> {
base: React.RefObject<SVGGElement> = React.createRef()
@computed private get seriesArray(): ScatterSeries[] {
return this.props.seriesArray
}
@computed private get isConnected(): boolean {
return this.seriesArray.some((g) => g.points.length > 1)
}
@computed private get focusedSeriesNames(): string[] {
return intersection(
this.props.focusedSeriesNames || [],
this.seriesArray.map((g) => g.seriesName)
)
}
@computed private get hoveredSeriesNames(): string[] {
return this.props.hoveredSeriesNames
}
// Layered mode occurs when any entity on the chart is hovered or focused
// Then, a special "foreground" set of entities is rendered over the background
@computed private get isLayerMode(): boolean {
return (
this.focusedSeriesNames.length > 0 ||
this.hoveredSeriesNames.length > 0
)
}
@computed private get bounds(): Bounds {
return this.props.dualAxis.innerBounds
}
// When focusing multiple entities, we hide some information to declutter
@computed private get isSubtleForeground(): boolean {
return (
this.focusedSeriesNames.length > 1 &&
this.props.seriesArray.some((series) => series.points.length > 2)
)
}
@computed private get colorScale(): ColorScale | undefined {
return this.props.colorScale
}
@computed private get sizeScale(): ScaleLinear<number, number> {
const sizeScale = scaleLinear()
.range([10, 1000])
.domain(this.props.sizeDomain)
return sizeScale
}
@computed private get fontScale(): (d: number) => number {
return scaleLinear().range([10, 13]).domain(this.sizeScale.domain())
}
@computed private get hideConnectedScatterLines(): boolean {
return this.props.hideConnectedScatterLines
}
// Pre-transform data for rendering
@computed private get initialRenderSeries(): ScatterRenderSeries[] {
const { seriesArray, sizeScale, fontScale, colorScale, bounds } = this
const xAxis = this.props.dualAxis.horizontalAxis.clone()
xAxis.range = bounds.xRange()
const yAxis = this.props.dualAxis.verticalAxis.clone()
yAxis.range = this.bounds.yRange()
return sortNumeric(
seriesArray.map((series) => {
const points = series.points.map((point) => {
const area = sizeScale(point.size || 4)
const scaleColor =
colorScale !== undefined
? colorScale.getColor(point.color)
: undefined
return {
position: new PointVector(
Math.floor(xAxis.place(point.x)),
Math.floor(yAxis.place(point.y))
),
color: scaleColor ?? series.color,
size: Math.sqrt(area / Math.PI),
fontSize: fontScale(series.size || 1),
time: point.time,
label: point.label,
}
})
return {
seriesName: series.seriesName,
displayKey: "key-" + makeSafeForCSS(series.seriesName),
color: series.color,
size: (last(points) as any).size,
points,
text: series.label,
midLabels: [],
allLabels: [],
offsetVector: PointVector.zero,
}
}),
(d) => d.size,
SortOrder.desc
)
}
@computed private get renderSeries(): ScatterRenderSeries[] {
// Draw the largest points first so that smaller ones can sit on top of them
const renderData = this.initialRenderSeries
for (const series of renderData) {
series.isHover = this.hoveredSeriesNames.includes(series.seriesName)
series.isFocus = this.focusedSeriesNames.includes(series.seriesName)
series.isForeground = series.isHover || series.isFocus
if (series.isHover) series.size += 1
}
for (const series of renderData) {
series.startLabel = makeStartLabel(
series,
this.isSubtleForeground,
this.hideConnectedScatterLines
)
series.midLabels = makeMidLabels(
series,
this.isSubtleForeground,
this.hideConnectedScatterLines
)
series.endLabel = makeEndLabel(
series,
this.isSubtleForeground,
this.hideConnectedScatterLines
)
series.allLabels = [series.startLabel]
.concat(series.midLabels)
.concat([series.endLabel])
.filter((x) => x) as ScatterLabel[]
}
const labels = flatten(renderData.map((series) => series.allLabels))
// Ensure labels fit inside bounds
// Must do before collision detection since it'll change the positions
this.moveLabelsInsideChartBounds(labels, this.bounds)
const labelsByPriority = sortNumeric(
labels,
(l) => labelPriority(l),
SortOrder.desc
)
if (this.focusedSeriesNames.length > 0)
this.hideUnselectedLabels(labelsByPriority)
this.hideCollidingLabelsByPriority(labelsByPriority)
return renderData
}
private hideUnselectedLabels(labelsByPriority: ScatterLabel[]): void {
labelsByPriority
.filter((label) => !label.series.isFocus && !label.series.isHover)
.forEach((label) => (label.isHidden = true))
}
private hideCollidingLabelsByPriority(
labelsByPriority: ScatterLabel[]
): void {
for (let i = 0; i < labelsByPriority.length; i++) {
const higherPriorityLabel = labelsByPriority[i]
if (higherPriorityLabel.isHidden) continue
for (let j = i + 1; j < labelsByPriority.length; j++) {
const lowerPriorityLabel = labelsByPriority[j]
if (lowerPriorityLabel.isHidden) continue
const isHighlightedEndLabelOfEqualPriority =
lowerPriorityLabel.isEnd &&
(lowerPriorityLabel.series.isHover ||
lowerPriorityLabel.series.isFocus) &&
higherPriorityLabel.series.isHover ===
lowerPriorityLabel.series.isHover &&
higherPriorityLabel.series.isFocus ===
lowerPriorityLabel.series.isFocus
if (
isHighlightedEndLabelOfEqualPriority
? // For highlighted end labels of equal priority, we want to allow some
// overlap – labels are still readable even if they overlap
higherPriorityLabel.bounds
.pad(6) // allow up to 6px of overlap
.intersects(lowerPriorityLabel.bounds)
: // For non-highlighted labels we want to leave more space between labels,
// partly to have a less noisy chart, and partly to prevent readers from
// thinking that "everything is labelled". In the past this has made
// readers think that if a label doesn't exist, it isn't plotted on the
// chart.
higherPriorityLabel.bounds
.pad(-6)
.intersects(lowerPriorityLabel.bounds)
) {
lowerPriorityLabel.isHidden = true
}
}
}
}
// todo: move this to bounds class with a test
private moveLabelsInsideChartBounds(
labels: ScatterLabel[],
bounds: Bounds
): void {
for (const label of labels) {
if (label.bounds.left < bounds.left - 1)
label.bounds = label.bounds.set({
x: label.bounds.x + label.bounds.width,
})
else if (label.bounds.right > bounds.right + 1)
label.bounds = label.bounds.set({
x: label.bounds.x - label.bounds.width,
})
if (label.bounds.top < bounds.top - 1)
label.bounds = label.bounds.set({ y: bounds.top })
else if (label.bounds.bottom > bounds.bottom + 1)
label.bounds = label.bounds.set({
y: bounds.bottom - label.bounds.height,
})
}
}
mouseFrame?: number
@action.bound onMouseLeave(): void {
if (this.mouseFrame !== undefined) cancelAnimationFrame(this.mouseFrame)
if (this.props.onMouseLeave) this.props.onMouseLeave()
}
@action.bound onMouseMove(ev: React.MouseEvent<SVGGElement>): void {
if (this.mouseFrame !== undefined) cancelAnimationFrame(this.mouseFrame)
const nativeEvent = ev.nativeEvent
this.mouseFrame = requestAnimationFrame(() => {
if (this.base.current) {
const mouse = getRelativeMouse(this.base.current, nativeEvent)
const closestSeries = minBy(this.renderSeries, (series) => {
if (series.points.length > 1)
return min(
series.points.slice(0, -1).map((d, i) => {
return PointVector.distanceFromPointToLineSq(
mouse,
d.position,
series.points[i + 1].position
)
})
)
return min(
series.points.map((v) =>
PointVector.distanceSq(v.position, mouse)
)
)
})
if (closestSeries && this.props.onMouseOver) {
const series = this.seriesArray.find(
(series) =>
series.seriesName === closestSeries.seriesName
)
if (series) this.props.onMouseOver(series)
}
}
})
}
@action.bound onClick(): void {
if (this.props.onClick) this.props.onClick()
}
@computed get backgroundSeries(): ScatterRenderSeries[] {
return this.renderSeries.filter((series) => !series.isForeground)
}
@computed get foregroundSeries(): ScatterRenderSeries[] {
return this.renderSeries.filter((series) => !!series.isForeground)
}
private renderBackgroundSeries(): JSX.Element[] {
const {
backgroundSeries,
isLayerMode,
isConnected,
hideConnectedScatterLines,
} = this
return hideConnectedScatterLines
? []
: backgroundSeries.map((series) => (
<ScatterLine
key={series.seriesName}
series={series}
isLayerMode={isLayerMode}
isConnected={isConnected}
/>
))
}
private renderBackgroundLabels(): JSX.Element {
const { isLayerMode } = this
return (
<g
className="backgroundLabels"
fill={!isLayerMode ? "#333" : "#aaa"}
>
{this.backgroundSeries.map((series) => {
return series.allLabels
.filter((label) => !label.isHidden)
.map((label) =>
getElementWithHalo(
series.displayKey + "-endLabel",
<text
x={label.bounds.x.toFixed(2)}
y={(
label.bounds.y + label.bounds.height
).toFixed(2)}
fontSize={label.fontSize.toFixed(2)}
fontWeight={label.fontWeight}
fill={isLayerMode ? "#aaa" : label.color}
>
{label.text}
</text>
)
)
})}
</g>
)
}
@computed get renderUid(): number {
return guid()
}
private renderForegroundSeries(): JSX.Element[] {
const { isSubtleForeground, hideConnectedScatterLines } = this
return this.foregroundSeries.map((series) => {
const lastValue = last(series.points) as ScatterRenderPoint
const strokeWidth =
(hideConnectedScatterLines
? 3
: series.isHover
? 3
: isSubtleForeground
? 1.5
: 2) +
lastValue.size * 0.05
if (series.points.length === 1)
return <ScatterPoint key={series.displayKey} series={series} />
const firstValue = first(series.points)
const opacity = isSubtleForeground ? 0.9 : 1
const radius = hideConnectedScatterLines
? strokeWidth
: strokeWidth / 2 + 1
let rotation = PointVector.angle(
series.offsetVector,
PointVector.up
)
if (series.offsetVector.x < 0) rotation = -rotation
return (
<g key={series.displayKey} className={series.displayKey}>
{!hideConnectedScatterLines && (
<MultiColorPolyline
points={series.points.map((point) => ({
x: point.position.x,
y: point.position.y,
color: point.color,
}))}
strokeWidth={strokeWidth}
opacity={opacity}
/>
)}
{(series.isFocus || hideConnectedScatterLines) &&
firstValue && (
<circle
cx={firstValue.position.x.toFixed(2)}
cy={firstValue.position.y.toFixed(2)}
r={radius}
fill={firstValue.color}
opacity={opacity}
stroke={firstValue.color}
strokeOpacity={0.6}
/>
)}
{(series.isHover || hideConnectedScatterLines) &&
series.points
.slice(
1,
hideConnectedScatterLines ? undefined : -1
)
.map((v, index) => (
<circle
key={index}
cx={v.position.x}
cy={v.position.y}
r={radius}
fill={v.color}
stroke="none"
/>
))}
{!hideConnectedScatterLines && (
<Triangle
transform={`rotate(${rotation}, ${lastValue.position.x.toFixed(
2
)}, ${lastValue.position.y.toFixed(2)})`}
cx={lastValue.position.x}
cy={lastValue.position.y}
r={strokeWidth * 2}
fill={lastValue.color}
opacity={opacity}
/>
)}
</g>
)
})
}
private renderForegroundLabels(): JSX.Element[][] {
return this.foregroundSeries.map((series) => {
return series.allLabels
.filter((label) => !label.isHidden)
.map((label, index) =>
getElementWithHalo(
`${series.displayKey}-label-${index}`,
<text
x={label.bounds.x.toFixed(2)}
y={(label.bounds.y + label.bounds.height).toFixed(
2
)}
fontSize={label.fontSize}
fontFamily={ScatterLabelFontFamily}
fontWeight={label.fontWeight}
fill={label.color}
>
{label.text}
</text>
)
)
})
}
animSelection?: d3.Selection<
d3.BaseType,
unknown,
SVGGElement | null,
unknown
>
private runAnimation(): void {
const radiuses: string[] = []
this.animSelection = select(this.base.current).selectAll("circle")
this.animSelection
.each(function () {
const circle = this as SVGCircleElement
radiuses.push(circle.getAttribute("r") as string)
circle.setAttribute("r", "0")
})
.transition()
.duration(500)
.attr("r", (_, i) => radiuses[i])
.on("end", () => this.forceUpdate())
}
componentDidMount(): void {
this.runAnimation()
}
componentWillUnmount(): void {
if (this.animSelection) this.animSelection.interrupt()
}
render(): JSX.Element {
const { bounds, renderSeries, renderUid } = this
const clipBounds = bounds.pad(-10)
if (isEmpty(renderSeries))
return (
<NoDataModal
manager={this.props.noDataModalManager}
bounds={bounds}
/>
)
return (
<g
ref={this.base}
className="PointsWithLabels clickable"
clipPath={`url(#scatterBounds-${renderUid})`}
onMouseMove={this.onMouseMove}
onMouseLeave={this.onMouseLeave}
onClick={this.onClick}
fontFamily={ScatterLabelFontFamily}
>
<rect
key="background"
x={bounds.x}
y={bounds.y}
width={bounds.width}
height={bounds.height}
fill="rgba(255,255,255,0)"
/>
<defs>
<clipPath id={`scatterBounds-${renderUid}`}>
<rect
x={clipBounds.x}
y={clipBounds.y}
width={clipBounds.width}
height={clipBounds.height}
/>
</clipPath>
</defs>
{this.renderBackgroundSeries()}
{this.renderBackgroundLabels()}
{this.renderForegroundSeries()}
{this.renderForegroundLabels()}
</g>
)
}
}
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