da2a5103fa
- Added the `color_based_on_candle` parameter to the legend, which will color the percentage change based on the candle color underneath the crosshair. (#210) - Fixed a bug which prevented the legend from turning off. (#216)
549 lines
22 KiB
JavaScript
549 lines
22 KiB
JavaScript
if (!window.Chart) {
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window.pane = {
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backgroundColor: '#0c0d0f',
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hoverBackgroundColor: '#3c434c',
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clickBackgroundColor: '#50565E',
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activeBackgroundColor: 'rgba(0, 122, 255, 0.7)',
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mutedBackgroundColor: 'rgba(0, 122, 255, 0.3)',
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borderColor: '#3C434C',
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color: '#d8d9db',
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activeColor: '#ececed',
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}
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class Chart {
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constructor(chartId, innerWidth, innerHeight, position, autoSize) {
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this.makeCandlestickSeries = this.makeCandlestickSeries.bind(this)
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this.reSize = this.reSize.bind(this)
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this.id = chartId
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this.lines = []
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this.interval = null
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this.wrapper = document.createElement('div')
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this.div = document.createElement('div')
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this.scale = {
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width: innerWidth,
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height: innerHeight,
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}
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this.commandFunctions = []
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this.chart = LightweightCharts.createChart(this.div, {
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width: window.innerWidth * innerWidth,
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height: window.innerHeight * innerHeight,
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layout: {
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textColor: pane.color,
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background: {
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color: '#000000',
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type: LightweightCharts.ColorType.Solid,
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},
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fontSize: 12
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},
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rightPriceScale: {
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scaleMargins: {top: 0.3, bottom: 0.25},
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},
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timeScale: {timeVisible: true, secondsVisible: false},
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crosshair: {
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mode: LightweightCharts.CrosshairMode.Normal,
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vertLine: {
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labelBackgroundColor: 'rgb(46, 46, 46)'
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},
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horzLine: {
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labelBackgroundColor: 'rgb(55, 55, 55)'
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}
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},
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grid: {
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vertLines: {color: 'rgba(29, 30, 38, 5)'},
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horzLines: {color: 'rgba(29, 30, 58, 5)'},
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},
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handleScroll: {vertTouchDrag: true},
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})
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this.legend = new Legend(this)
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this.wrapper.style.display = 'flex'
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this.wrapper.style.flexDirection = 'column'
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this.wrapper.style.position = 'relative'
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this.wrapper.style.float = position
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this.div.style.position = 'relative'
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// this.div.style.display = 'flex'
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this.reSize()
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this.wrapper.appendChild(this.div)
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document.getElementById('wrapper').append(this.wrapper)
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document.addEventListener('keydown', (event) => {
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for (let i = 0; i < this.commandFunctions.length; i++) {
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if (this.commandFunctions[i](event)) break
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}
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})
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if (!autoSize) return
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window.addEventListener('resize', () => this.reSize())
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}
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reSize() {
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let topBarOffset = 'topBar' in this && this.scale.height !== 0 ? this.topBar.offsetHeight : 0
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this.chart.resize(window.innerWidth * this.scale.width, (window.innerHeight * this.scale.height) - topBarOffset)
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this.wrapper.style.width = `${100 * this.scale.width}%`
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this.wrapper.style.height = `${100 * this.scale.height}%`
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if (this.legend) {
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if (this.scale.height === 0 || this.scale.width === 0) {
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this.legend.div.style.display = 'none'
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}
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else {
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this.legend.div.style.display = 'flex'
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}
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}
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}
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makeCandlestickSeries() {
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this.markers = []
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this.horizontal_lines = []
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this.data = []
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this.precision = 2
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let up = 'rgba(39, 157, 130, 100)'
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let down = 'rgba(200, 97, 100, 100)'
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this.series = this.chart.addCandlestickSeries({
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color: 'rgb(0, 120, 255)', upColor: up, borderUpColor: up, wickUpColor: up,
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downColor: down, borderDownColor: down, wickDownColor: down, lineWidth: 2,
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})
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this.volumeSeries = this.chart.addHistogramSeries({
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color: '#26a69a',
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priceFormat: {type: 'volume'},
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priceScaleId: 'volume_scale',
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})
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this.series.priceScale().applyOptions({
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scaleMargins: {top: 0.2, bottom: 0.2},
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});
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this.volumeSeries.priceScale().applyOptions({
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scaleMargins: {top: 0.8, bottom: 0},
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});
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}
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toJSON() {
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// Exclude the chart attribute from serialization
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const {chart, ...serialized} = this;
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return serialized;
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}
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}
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window.Chart = Chart
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class HorizontalLine {
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constructor(chart, lineId, price, color, width, style, axisLabelVisible, text) {
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this.updatePrice = this.updatePrice.bind(this)
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this.deleteLine = this.deleteLine.bind(this)
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this.chart = chart
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this.price = price
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this.color = color
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this.id = lineId
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this.priceLine = {
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price: this.price,
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color: this.color,
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lineWidth: width,
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lineStyle: style,
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axisLabelVisible: axisLabelVisible,
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title: text,
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}
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this.line = this.chart.series.createPriceLine(this.priceLine)
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this.chart.horizontal_lines.push(this)
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}
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toJSON() {
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// Exclude the chart attribute from serialization
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const {chart, line, ...serialized} = this;
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return serialized;
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}
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updatePrice(price) {
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this.chart.series.removePriceLine(this.line)
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this.price = price
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this.priceLine.price = this.price
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this.line = this.chart.series.createPriceLine(this.priceLine)
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}
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updateLabel(text) {
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this.chart.series.removePriceLine(this.line)
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this.priceLine.title = text
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this.line = this.chart.series.createPriceLine(this.priceLine)
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}
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updateColor(color) {
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this.chart.series.removePriceLine(this.line)
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this.color = color
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this.priceLine.color = this.color
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this.line = this.chart.series.createPriceLine(this.priceLine)
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}
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updateStyle(style) {
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this.chart.series.removePriceLine(this.line)
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this.priceLine.lineStyle = style
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this.line = this.chart.series.createPriceLine(this.priceLine)
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}
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deleteLine() {
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this.chart.series.removePriceLine(this.line)
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this.chart.horizontal_lines.splice(this.chart.horizontal_lines.indexOf(this))
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delete this
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}
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}
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window.HorizontalLine = HorizontalLine
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class Legend {
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constructor(chart) {
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this.ohlcEnabled = false
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this.percentEnabled = false
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this.linesEnabled = false
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this.colorBasedOnCandle = false
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this.div = document.createElement('div')
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this.div.style.position = 'absolute'
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this.div.style.zIndex = '3000'
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this.div.style.pointerEvents = 'none'
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this.div.style.top = '10px'
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this.div.style.left = '10px'
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this.div.style.display = 'flex'
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this.div.style.flexDirection = 'column'
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this.div.style.maxWidth = `${(chart.scale.width * 100) - 8}vw`
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this.text = document.createElement('span')
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this.text.style.lineHeight = '1.8'
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this.candle = document.createElement('div')
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this.div.appendChild(this.text)
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this.div.appendChild(this.candle)
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chart.div.appendChild(this.div)
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this.makeLines(chart)
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let legendItemFormat = (num, decimal) => num.toFixed(decimal).toString().padStart(8, ' ')
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let shorthandFormat = (num) => {
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const absNum = Math.abs(num)
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if (absNum >= 1000000) {
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return (num / 1000000).toFixed(1) + 'M';
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} else if (absNum >= 1000) {
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return (num / 1000).toFixed(1) + 'K';
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}
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return num.toString().padStart(8, ' ');
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}
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chart.chart.subscribeCrosshairMove((param) => {
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let options = chart.series.options()
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if (!param.time) {
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this.candle.style.color = 'transparent'
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this.candle.innerHTML = this.candle.innerHTML.replace(options['upColor'], '').replace(options['downColor'], '')
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return
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}
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let data = param.seriesData.get(chart.series);
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this.candle.style.color = ''
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let str = '<span style="line-height: 1.8;">'
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if (data) {
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if (this.ohlcEnabled) {
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str += `O ${legendItemFormat(data.open, chart.precision)} `
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str += `| H ${legendItemFormat(data.high, chart.precision)} `
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str += `| L ${legendItemFormat(data.low, chart.precision)} `
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str += `| C ${legendItemFormat(data.close, chart.precision)} `
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}
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if (this.percentEnabled) {
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let percentMove = ((data.close - data.open) / data.open) * 100
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let color = percentMove > 0 ? options['upColor'] : options['downColor']
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let percentStr = `${percentMove >= 0 ? '+' : ''}${percentMove.toFixed(2)} %`
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if (this.colorBasedOnCandle) {
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str += `| <span style="color: ${color};">${percentStr}</span>`
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}
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else {
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str += '| ' + percentStr
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}
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}
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let volumeData = param.seriesData.get(chart.volumeSeries)
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if (volumeData) {
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str += this.ohlcEnabled ? `<br>V ${shorthandFormat(volumeData.value)}` : ''
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}
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}
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this.candle.innerHTML = str + '</span>'
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this.lines.forEach((line) => {
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if (!this.linesEnabled) {
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line.row.style.display = 'none'
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return
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}
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line.row.style.display = 'flex'
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if (!param.seriesData.get(line.line.series)) return
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let price = param.seriesData.get(line.line.series).value
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if (line.line.type === 'histogram') {
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price = shorthandFormat(price)
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}
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else {
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price = legendItemFormat(price, line.line.precision)
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}
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line.div.innerHTML = `<span style="color: ${line.solid};">▨</span> ${line.line.name} : ${price}`
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})
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});
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}
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toJSON() {
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// Exclude the chart attribute from serialization
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const {lines, ...serialized} = this;
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return serialized;
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}
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makeLines(chart) {
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this.lines = []
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if (this.linesEnabled) chart.lines.forEach(line => this.lines.push(this.makeLineRow(line)))
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}
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makeLineRow(line) {
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let openEye = `
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<path style="fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke:${this.color};stroke-opacity:1;stroke-miterlimit:4;" d="M 21.998437 12 C 21.998437 12 18.998437 18 12 18 C 5.001562 18 2.001562 12 2.001562 12 C 2.001562 12 5.001562 6 12 6 C 18.998437 6 21.998437 12 21.998437 12 Z M 21.998437 12 " transform="matrix(0.833333,0,0,0.833333,0,0)"/>
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<path style="fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke:${this.color};stroke-opacity:1;stroke-miterlimit:4;" d="M 15 12 C 15 13.654687 13.654687 15 12 15 C 10.345312 15 9 13.654687 9 12 C 9 10.345312 10.345312 9 12 9 C 13.654687 9 15 10.345312 15 12 Z M 15 12 " transform="matrix(0.833333,0,0,0.833333,0,0)"/>\`
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`
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let closedEye = `
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<path style="fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke:${this.color};stroke-opacity:1;stroke-miterlimit:4;" d="M 20.001562 9 C 20.001562 9 19.678125 9.665625 18.998437 10.514062 M 12 14.001562 C 10.392187 14.001562 9.046875 13.589062 7.95 12.998437 M 12 14.001562 C 13.607812 14.001562 14.953125 13.589062 16.05 12.998437 M 12 14.001562 L 12 17.498437 M 3.998437 9 C 3.998437 9 4.354687 9.735937 5.104687 10.645312 M 7.95 12.998437 L 5.001562 15.998437 M 7.95 12.998437 C 6.689062 12.328125 5.751562 11.423437 5.104687 10.645312 M 16.05 12.998437 L 18.501562 15.998437 M 16.05 12.998437 C 17.38125 12.290625 18.351562 11.320312 18.998437 10.514062 M 5.104687 10.645312 L 2.001562 12 M 18.998437 10.514062 L 21.998437 12 " transform="matrix(0.833333,0,0,0.833333,0,0)"/>
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`
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let row = document.createElement('div')
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row.style.display = 'flex'
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row.style.alignItems = 'center'
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let div = document.createElement('div')
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let toggle = document.createElement('div')
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toggle.style.borderRadius = '4px'
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toggle.style.marginLeft = '10px'
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toggle.style.pointerEvents = 'auto'
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let svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
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svg.setAttribute("width", "22");
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svg.setAttribute("height", "16");
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let group = document.createElementNS("http://www.w3.org/2000/svg", "g");
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group.innerHTML = openEye
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let on = true
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toggle.addEventListener('click', (event) => {
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if (on) {
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on = false
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group.innerHTML = closedEye
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line.series.applyOptions({
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visible: false
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})
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} else {
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on = true
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line.series.applyOptions({
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visible: true
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})
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group.innerHTML = openEye
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}
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})
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toggle.addEventListener('mouseover', (event) => {
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document.body.style.cursor = 'pointer'
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toggle.style.backgroundColor = 'rgba(50, 50, 50, 0.5)'
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})
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toggle.addEventListener('mouseleave', (event) => {
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document.body.style.cursor = 'default'
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toggle.style.backgroundColor = 'transparent'
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})
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svg.appendChild(group)
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toggle.appendChild(svg);
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row.appendChild(div)
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row.appendChild(toggle)
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this.div.appendChild(row)
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return {
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div: div,
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row: row,
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toggle: toggle,
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line: line,
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solid: line.color.startsWith('rgba') ? line.color.replace(/[^,]+(?=\))/, '1') : line.color
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}
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}
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}
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window.Legend = Legend
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}
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function syncCharts(childChart, parentChart) {
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function crosshairHandler(chart, series, point) {
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if (!point) {
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chart.clearCrosshairPosition()
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return
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}
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chart.setCrosshairPosition(point.value || point.close, point.time, series);
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}
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function getPoint(series, param) {
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if (!param.time) return null;
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return param.seriesData.get(series) || null;
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}
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let setChildRange = (timeRange) => childChart.chart.timeScale().setVisibleLogicalRange(timeRange)
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let setParentRange = (timeRange) => parentChart.chart.timeScale().setVisibleLogicalRange(timeRange)
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let setParentCrosshair = (param) => {
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crosshairHandler(parentChart.chart, parentChart.series, getPoint(childChart.series, param))
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}
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let setChildCrosshair = (param) => {
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crosshairHandler(childChart.chart, childChart.series, getPoint(parentChart.series, param))
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}
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let selected = parentChart
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function addMouseOverListener(thisChart, otherChart, thisCrosshair, otherCrosshair, thisRange, otherRange) {
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thisChart.wrapper.addEventListener('mouseover', (event) => {
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if (selected === thisChart) return
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selected = thisChart
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otherChart.chart.timeScale().unsubscribeVisibleLogicalRangeChange(thisRange)
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otherChart.chart.unsubscribeCrosshairMove(thisCrosshair)
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thisChart.chart.timeScale().subscribeVisibleLogicalRangeChange(otherRange)
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thisChart.chart.subscribeCrosshairMove(otherCrosshair)
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})
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}
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addMouseOverListener(parentChart, childChart, setParentCrosshair, setChildCrosshair, setParentRange, setChildRange)
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addMouseOverListener(childChart, parentChart, setChildCrosshair, setParentCrosshair, setChildRange, setParentRange)
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parentChart.chart.timeScale().subscribeVisibleLogicalRangeChange(setChildRange)
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parentChart.chart.subscribeCrosshairMove(setChildCrosshair)
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}
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function stampToDate(stampOrBusiness) {
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return new Date(stampOrBusiness*1000)
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}
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function dateToStamp(date) {
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return Math.floor(date.getTime()/1000)
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}
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function lastBar(obj) {
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return obj[obj.length-1]
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}
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function calculateTrendLine(startDate, startValue, endDate, endValue, chart, ray=false) {
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let reversed = false
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if (stampToDate(endDate).getTime() < stampToDate(startDate).getTime()) {
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reversed = true;
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[startDate, endDate] = [endDate, startDate];
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}
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let startIndex
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if (stampToDate(startDate).getTime() < stampToDate(chart.data[0].time).getTime()) {
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startIndex = 0
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}
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else {
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startIndex = chart.data.findIndex(item => stampToDate(item.time).getTime() === stampToDate(startDate).getTime())
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}
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if (startIndex === -1) {
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throw new Error(`Could not calculate start index from time ${stampToDate(startDate)}.`)
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}
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let endIndex
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if (ray) {
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endIndex = chart.data.length+1000
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startValue = endValue
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}
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else {
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endIndex = chart.data.findIndex(item => stampToDate(item.time).getTime() === stampToDate(endDate).getTime())
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if (endIndex === -1) {
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let barsBetween = (endDate-lastBar(chart.data).time)/chart.interval
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endIndex = chart.data.length-1+barsBetween
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}
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}
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let numBars = endIndex-startIndex
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const rate_of_change = (endValue - startValue) / numBars;
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const trendData = [];
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let currentDate = null
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let iPastData = 0
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for (let i = 0; i <= numBars; i++) {
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if (chart.data[startIndex+i]) {
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currentDate = chart.data[startIndex+i].time
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}
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else {
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iPastData ++
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currentDate = lastBar(chart.data).time+(iPastData*chart.interval)
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}
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const currentValue = reversed ? startValue + rate_of_change * (numBars - i) : startValue + rate_of_change * i;
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trendData.push({ time: currentDate, value: currentValue });
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}
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return trendData;
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}
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if (!window.ContextMenu) {
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class ContextMenu {
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constructor() {
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this.menu = document.createElement('div')
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this.menu.style.position = 'absolute'
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this.menu.style.zIndex = '10000'
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this.menu.style.background = 'rgb(50, 50, 50)'
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this.menu.style.color = pane.activeColor
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this.menu.style.display = 'none'
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this.menu.style.borderRadius = '5px'
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this.menu.style.padding = '3px 3px'
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this.menu.style.fontSize = '13px'
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this.menu.style.cursor = 'default'
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document.body.appendChild(this.menu)
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this.hoverItem = null
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let closeMenu = (event) => {
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if (!this.menu.contains(event.target)) {
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this.menu.style.display = 'none';
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this.listen(false)
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}
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}
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this.onRightClick = (event) => {
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event.preventDefault();
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this.menu.style.left = event.clientX + 'px';
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this.menu.style.top = event.clientY + 'px';
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this.menu.style.display = 'block';
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document.removeEventListener('click', closeMenu)
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document.addEventListener('click', closeMenu)
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}
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}
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listen(active) {
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active ? document.addEventListener('contextmenu', this.onRightClick) : document.removeEventListener('contextmenu', this.onRightClick)
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}
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menuItem(text, action, hover=false) {
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let item = document.createElement('span')
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item.style.display = 'flex'
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item.style.alignItems = 'center'
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item.style.justifyContent = 'space-between'
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item.style.padding = '2px 10px'
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item.style.margin = '1px 0px'
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item.style.borderRadius = '3px'
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this.menu.appendChild(item)
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let elem = document.createElement('span')
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elem.innerText = text
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elem.style.pointerEvents = 'none'
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item.appendChild(elem)
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if (hover) {
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let arrow = document.createElement('span')
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arrow.innerText = `►`
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arrow.style.fontSize = '8px'
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arrow.style.pointerEvents = 'none'
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item.appendChild(arrow)
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}
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item.addEventListener('mouseover', (event) => {
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item.style.backgroundColor = 'rgba(0, 122, 255, 0.3)'
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if (this.hoverItem && this.hoverItem.closeAction) this.hoverItem.closeAction()
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this.hoverItem = {elem: elem, action: action, closeAction: hover}
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})
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item.addEventListener('mouseout', (event) => item.style.backgroundColor = 'transparent')
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if (!hover) item.addEventListener('click', (event) => {action(event); this.menu.style.display = 'none'})
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else {
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let timeout
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item.addEventListener('mouseover', () => timeout = setTimeout(() => action(item.getBoundingClientRect()), 100))
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item.addEventListener('mouseout', () => clearTimeout(timeout))
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}
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}
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separator() {
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let separator = document.createElement('div')
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separator.style.width = '90%'
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separator.style.height = '1px'
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separator.style.margin = '3px 0px'
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separator.style.backgroundColor = pane.borderColor
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this.menu.appendChild(separator)
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}
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}
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window.ContextMenu = ContextMenu
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}
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window.callbackFunction = () => undefined; |