527130e618
- Added `toolbox` to the common methods. - `toolbox.save_drawings_under` can save drawings under a specific `topbar` widget. eg `chart.toolbox.save_drawings_under(chart.topbar[’symbol’]`) - `toolbox.load_drawings` will load and display drawings stored under the tag/string given. - `toolbox.export_drawings` will export all currently saved drawings to the given file path. - `toolbox.import_drawings` will import the drawings stored at the given file path. Fixes/Enhancements: - `update` methods are no longer case sensitive. - HorizontalLines no longer throw cyclic structure errors in the web console. - `API` methods can now be normal methods or coroutines.
370 lines
15 KiB
JavaScript
370 lines
15 KiB
JavaScript
function makeChart(callbackFunction, innerWidth, innerHeight, autoSize=true) {
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let chart = {
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markers: [],
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horizontal_lines: [],
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lines: [],
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wrapper: document.createElement('div'),
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div: document.createElement('div'),
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scale: {
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width: innerWidth,
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height: innerHeight,
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},
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callbackFunction: callbackFunction,
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candleData: [],
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commandFunctions: []
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}
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chart.chart = LightweightCharts.createChart(chart.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: '#d1d4dc',
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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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let up = 'rgba(39, 157, 130, 100)'
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let down = 'rgba(200, 97, 100, 100)'
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chart.series = chart.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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chart.volumeSeries = chart.chart.addHistogramSeries({
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color: '#26a69a',
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priceFormat: {type: 'volume'},
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priceScaleId: '',
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})
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chart.series.priceScale().applyOptions({
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scaleMargins: {top: 0.2, bottom: 0.2},
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});
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chart.volumeSeries.priceScale().applyOptions({
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scaleMargins: {top: 0.8, bottom: 0},
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});
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chart.wrapper.style.width = `${100*innerWidth}%`
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chart.wrapper.style.height = `${100*innerHeight}%`
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chart.wrapper.style.display = 'flex'
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chart.wrapper.style.flexDirection = 'column'
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chart.div.style.position = 'relative'
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chart.div.style.display = 'flex'
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chart.wrapper.appendChild(chart.div)
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document.getElementById('wrapper').append(chart.wrapper)
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document.addEventListener('keydown', (event) => {
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for (let i=0; i<chart.commandFunctions.length; i++) {
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if (chart.commandFunctions[i](event)) break
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}
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})
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if (!autoSize) return chart
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window.addEventListener('resize', () => reSize(chart))
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return chart
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}
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function reSize(chart) {
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let topBarOffset = 'topBar' in chart ? chart.topBar.offsetHeight : 0
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chart.chart.resize(window.innerWidth*chart.scale.width, (window.innerHeight*chart.scale.height)-topBarOffset)
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}
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if (!window.HorizontalLine) {
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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.id = lineId
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this.priceLine = {
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price: this.price,
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color: 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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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, ohlcEnabled = true, percentEnabled = true, linesEnabled = true,
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color = 'rgb(191, 195, 203)', fontSize = '11', fontFamily = 'Monaco') {
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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.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.width = `${(chart.scale.width * 100) - 8}vw`
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this.div.style.color = color
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this.div.style.fontSize = fontSize + 'px'
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this.div.style.fontFamily = fontFamily
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this.candle = document.createElement('div')
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this.div.appendChild(this.candle)
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chart.div.appendChild(this.div)
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this.color = color
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this.linesEnabled = linesEnabled
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this.makeLines(chart)
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let legendItemFormat = (num) => num.toFixed(2).toString().padStart(8, ' ')
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chart.chart.subscribeCrosshairMove((param) => {
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if (param.time) {
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let data = param.seriesData.get(chart.series);
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let finalString = '<span style="line-height: 1.8;">'
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if (data) {
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this.candle.style.color = ''
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let ohlc = `O ${legendItemFormat(data.open)}
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| H ${legendItemFormat(data.high)}
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| L ${legendItemFormat(data.low)}
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| C ${legendItemFormat(data.close)} `
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let percentMove = ((data.close - data.open) / data.open) * 100
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let percent = `| ${percentMove >= 0 ? '+' : ''}${percentMove.toFixed(2)} %`
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finalString += ohlcEnabled ? ohlc : ''
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finalString += percentEnabled ? percent : ''
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}
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this.candle.innerHTML = finalString + '</span>'
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this.lines.forEach((line) => {
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if (!param.seriesData.get(line.line.series)) return
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let price = legendItemFormat(param.seriesData.get(line.line.series).value)
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line.div.innerHTML = `<span style="color: ${line.line.color};">▨</span> ${line.line.name} : ${price}`
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})
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} else {
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this.candle.style.color = 'transparent'
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}
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});
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}
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makeLines(chart) {
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this.lines = []
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if (this.linesEnabled) {
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chart.lines.forEach((line) => {
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this.lines.push(this.makeLineRow(line))
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})
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}
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}
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makeLineRow(line) {
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let openEye = `
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<path style="fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke:${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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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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}
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}
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}
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window.Legend = Legend
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}
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function syncCrosshairs(childChart, parentChart) {
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function crosshairHandler (e, thisChart, otherChart, otherHandler) {
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thisChart.applyOptions({crosshair: { horzLine: {
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visible: true,
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labelVisible: true,
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}}})
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otherChart.applyOptions({crosshair: { horzLine: {
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visible: false,
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labelVisible: false,
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}}})
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otherChart.unsubscribeCrosshairMove(otherHandler)
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if (e.time !== undefined) {
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let xx = otherChart.timeScale().timeToCoordinate(e.time);
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otherChart.setCrosshairXY(xx,300,true);
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} else if (e.point !== undefined){
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otherChart.setCrosshairXY(e.point.x,300,false);
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}
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otherChart.subscribeCrosshairMove(otherHandler)
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}
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let parent = 0
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let child = 0
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let parentCrosshairHandler = (e) => {
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parent ++
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if (parent < 10) return
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child = 0
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crosshairHandler(e, parentChart, childChart, childCrosshairHandler)
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}
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let childCrosshairHandler = (e) => {
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child ++
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if (child < 10) return
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parent = 0
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crosshairHandler(e, childChart, parentChart, parentCrosshairHandler)
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}
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parentChart.subscribeCrosshairMove(parentCrosshairHandler)
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childChart.subscribeCrosshairMove(childCrosshairHandler)
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}
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function chartTimeToDate(stampOrBusiness) {
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if (typeof stampOrBusiness === 'number') {
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stampOrBusiness = new Date(stampOrBusiness*1000)
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}
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else if (typeof stampOrBusiness === 'string') {
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let [year, month, day] = stampOrBusiness.split('-').map(Number)
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stampOrBusiness = new Date(Date.UTC(year, month-1, day))
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}
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else {
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stampOrBusiness = new Date(Date.UTC(stampOrBusiness.year, stampOrBusiness.month - 1, stampOrBusiness.day))
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}
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return stampOrBusiness
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}
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function dateToChartTime(date, interval) {
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if (interval >= 24*60*60*1000) {
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return {day: date.getUTCDate(), month: date.getUTCMonth()+1, year: date.getUTCFullYear()}
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}
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return Math.floor(date.getTime()/1000)
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}
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function calculateTrendLine(startDate, startValue, endDate, endValue, interval, chart, ray=false) {
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let reversed = false
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if (chartTimeToDate(endDate).getTime() < chartTimeToDate(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 (chartTimeToDate(startDate).getTime() < chartTimeToDate(chart.candleData[0].time).getTime()) {
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startIndex = 0
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}
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else {
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startIndex = chart.candleData.findIndex(item => chartTimeToDate(item.time).getTime() === chartTimeToDate(startDate).getTime())
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}
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if (startIndex === -1) {
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return []
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}
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let endIndex
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if (ray) {
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endIndex = chart.candleData.length+1000
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startValue = endValue
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}
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else {
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endIndex = chart.candleData.findIndex(item => chartTimeToDate(item.time).getTime() === chartTimeToDate(endDate).getTime())
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if (endIndex === -1) {
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let barsBetween = (chartTimeToDate(endDate)-chartTimeToDate(chart.candleData[chart.candleData.length-1].time))/interval
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endIndex = chart.candleData.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.candleData[startIndex+i]) {
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currentDate = chart.candleData[startIndex+i].time
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}
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else {
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iPastData ++
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currentDate = dateToChartTime(new Date(chartTimeToDate(chart.candleData[chart.candleData.length-1].time).getTime()+(iPastData*interval)), 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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