require:
- D3.js v4
- coffeescript
by TBD | @tbdr
Last active
February 10, 2020 17:06
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timeline chart with zoom
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| license: mit |
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| (function() { | |
| var i, j; | |
| window.VEHICLES = []; | |
| for (i = j = 1; j <= 15; i = ++j) { | |
| VEHICLES.push({ | |
| tir: i, | |
| start: new Date(+(new Date()) - Math.floor(Math.random() * 1000000000)), | |
| end: new Date() | |
| }); | |
| } | |
| }).call(this); |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="http://coffeescript.org/v1/browser-compiler/coffee-script.js"></script> | |
| <style> | |
| .chart { | |
| margin: 0 auto; | |
| width: 960px; | |
| min-height: 8px; | |
| height: 100%; | |
| box-shadow: 0 0 3px 1px #eee; | |
| } | |
| svg { | |
| vertical-align: top; | |
| width: 100%; | |
| height: 100%; | |
| } | |
| .tooltip { | |
| position: absolute; | |
| } | |
| .axis { | |
| height: 20px; | |
| } | |
| .zoom { | |
| cursor: move; | |
| position: absolute; | |
| top: 0; | |
| left: 0; | |
| fill: none; | |
| pointer-events: all; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="chart"></div> | |
| <script src="data.js"></script> | |
| <script type="text/coffeescript"> | |
| wrapper = document.querySelector '.chart' | |
| width = wrapper.clientWidth; | |
| parser = d3.isoParse | |
| minX = d3.min(VEHICLES, (d) -> parser d.start) | |
| maxX = d3.max(VEHICLES, (d) -> parser d.end) | |
| # --- X scale | |
| x = d3.scaleTime() | |
| .domain([minX, maxX]) | |
| .rangeRound([0, width]) | |
| # --- nest all the data | |
| symbols = d3.nest() | |
| .key (d) -> d.tir | |
| .entries(VEHICLES) | |
| height = wrapper.getBoundingClientRect().bottom | |
| spanX = (d) -> x(parser(d.start)) | |
| spanW = (d) -> x(parser(d.end)) - x(parser(d.start)) | |
| chart = (symbol) -> | |
| svg = d3.select this | |
| svg.selectAll 'rect' | |
| .data(symbol.values) | |
| .enter() | |
| .append 'rect' | |
| .attr 'x', (d) -> spanX d | |
| .attr 'y', 0 | |
| .attr 'width', (d) -> spanW d | |
| .attr 'height', height | |
| .attr 'fill', (d) -> d.color or '#ddf' | |
| .on 'mouseover', (d) -> | |
| tooltip.html [d.tir, d.start, d.end].join('<br>') | |
| .on 'mouseout', () -> | |
| tooltip.html '' | |
| # --- add all charts | |
| allCharts = d3.select(wrapper).selectAll('svg') | |
| .data(symbols) | |
| .enter() | |
| .append('svg') | |
| .attr('height', height) | |
| .each(chart) | |
| # --- add X axis | |
| xAxis = d3.axisBottom(x) | |
| .ticks(width / 100) | |
| globalX = d3.select(wrapper) | |
| .append('svg') | |
| .attr('class', 'axis') | |
| .call(xAxis) | |
| # --- catch all zoom svg rect | |
| catchAll = d3.select('body') | |
| .append 'svg' | |
| .attr 'class', 'zoom' | |
| .append 'rect' | |
| .attr 'fill', 'none' | |
| .attr 'width', width | |
| .attr 'height', wrapper.getBoundingClientRect().bottom | |
| # --- add tooltip | |
| tooltip = d3.select(wrapper).append('div') | |
| .attr 'class', 'tooltip' | |
| catchAll.call(d3.zoom() | |
| .scaleExtent([0.1, 10]) | |
| .on "zoom", -> | |
| transform = d3.event.transform | |
| globalX.call xAxis.scale(transform.rescaleX(x)) | |
| allCharts.selectAll('rect') | |
| .attr 'x', (d) -> transform.applyX spanX d | |
| .attr 'width', (d) -> transform.k * spanW d | |
| ) | |
| </script> | |
| </body> |
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