1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | 1× 1× | /* eslint-env browser */ const d3 = Object.assign({}, require('d3-selection'), require('d3-scale'), require('d3-axis'), require('d3-shape')); /** * Builds a Line Graph. * @constructor * @param {String} mode (init / refresh) * @exports lineGraph */ const lineGraph = function chart(mode) { const svgContainer = d3.select(`#${this.chartData.selector}`); let cs = { palette: { lineFill: '#ffcdcd', pointFill: '#005792', pointStroke: '#d1f4fa', }, x: { domain: [], range: [], axisHeight: 20, }, y: { axisWidth: 30, ticks: 5, }, }; /** * @method enter * @param {Object} points (svg element) * @description Runs when a new element is added to the dataset */ const enter = (points, path) => { if (mode === 'init') path.enter() .append('path') .attr('d', cs.lineFunction(this.ds)) .attr('fill', 'none') .attr('stroke', cs.palette.lineFill) .attr('stroke-width', 3); points.enter() .append('circle') .attr('class', this.selector) .attr('r', 2) .on('mouseover', (d) => { this.addTooltip(d, window.event); }) .on('mouseout', (d) => { this.removeTooltip(d); }) .attr('cx', d => cs.x.scale(d.dim) + cs.y.axisWidth + 5) .attr('cy', d => cs.y.scale(d.metric)); return points; }; /** * @method transition * @param {Object} points (svg element) * @description Runs when a value of an element in dataset is changed */ const transition = (points, path) => { path.transition() .attr('d', cs.lineFunction(this.ds)); points.transition() .attr('cx', d => cs.x.scale(d.dim) + cs.y.axisWidth + 5) .attr('cy', d => cs.y.scale(d.metric)) .attr('cx', d => cs.x.scale(d.dim) + cs.y.axisWidth + 5) .attr('cy', d => cs.y.scale(d.metric)); return points; }; /** * @method exit * @param {Object} points (svg element) * @description Runs when an element is removed from the dataset */ const exit = (points, path) => { points.exit().remove(); path.exit().remove(); return points; }; /** * @method buildScales * @description builds the scales for the x and y axes */ const buildScales = () => { cs.y.scale = d3.scaleLinear() .domain([this.min, this.max]) .range([this.height - cs.x.axisHeight, this.header]); cs.y.axis = d3.axisLeft().ticks(cs.y.ticks, 's').scale(cs.y.scale); this.ds.forEach(t => cs.x.domain.push(t.dim)); this.ds.forEach((t, i) => cs.x.range.push(((this.width * i) - this.header) / this.ds.length)); cs.x.scale = d3.scaleOrdinal().domain(cs.x.domain).range(cs.x.range); }; /** * @method drawAxis * @description draws the x and y axes on the svg */ const drawAxis = () => { cs.x.axis = d3.axisBottom().scale(cs.x.scale); cs.x.xOffset = cs.y.axisWidth + 5; cs.x.yOffset = this.height - cs.x.axisHeight; cs.y.xOffset = cs.y.axisWidth; cs.y.yOffset = 0; }; /** * * Helper Functions */ cs.lineFunction = d3.line() .x(d => cs.x.scale(d.dim) + cs.y.axisWidth + 5) .y(d => cs.y.scale(d.metric)); const points = svgContainer.selectAll('circle').data(this.ds); const path = svgContainer.selectAll('path').data(this.ds); cs = this.setOverrides(cs, this.chartData.overrides); buildScales(cs); drawAxis(cs); enter(points, path); transition(points,path); exit(points, path); svgContainer.append('g').append('g').attr('class', 'axis').attr('transform', `translate(${cs.x.xOffset}, ${cs.x.yOffset})`) .call(cs.x.axis); svgContainer.append('g').append('g').attr('class', 'axis').attr('transform', `translate(${cs.y.xOffset},${cs.y.yOffset})`) .call(cs.y.axis); }; export default lineGraph; |