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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 | 1× 1× 1× 1× 1× 1× 1× 1× 1× 1× | /* eslint-disable no-param-reassign */ import d3 from 'd3'; import { getColorFromScheme } from '../modules/colors'; import './sankey.css'; d3.sankey = require('d3-sankey').sankey; function sankeyVis(slice, payload) { const div = d3.select(slice.selector); const margin = { top: 5, right: 5, bottom: 5, left: 5, }; const width = slice.width() - margin.left - margin.right; const height = slice.height() - margin.top - margin.bottom; const formatNumber = d3.format(',.2f'); div.selectAll('*').remove(); const svg = div.append('svg') .attr('width', width + margin.left + margin.right) .attr('height', height + margin.top + margin.bottom) .append('g') .attr('transform', 'translate(' + margin.left + ',' + margin.top + ')'); const tooltip = div.append('div') .attr('class', 'sankey-tooltip') .style('opacity', 0); const sankey = d3.sankey() .nodeWidth(15) .nodePadding(10) .size([width, height]); const path = sankey.link(); let nodes = {}; // Compute the distinct nodes from the links. const links = payload.data.map(function (row) { const link = Object.assign({}, row); link.source = nodes[link.source] || (nodes[link.source] = { name: link.source }); link.target = nodes[link.target] || (nodes[link.target] = { name: link.target }); link.value = Number(link.value); return link; }); nodes = d3.values(nodes); sankey .nodes(nodes) .links(links) .layout(32); function getTooltipHtml(d) { let html; if (d.sourceLinks) { // is node html = d.name + " Value: <span class='emph'>" + formatNumber(d.value) + '</span>'; } else { const val = formatNumber(d.value); const sourcePercent = d3.round((d.value / d.source.value) * 100, 1); const targetPercent = d3.round((d.value / d.target.value) * 100, 1); html = [ "<div class=''>Path Value: <span class='emph'>", val, '</span></div>', "<div class='percents'>", "<span class='emph'>", (isFinite(sourcePercent) ? sourcePercent : '100'), '%</span> of ', d.source.name, '<br/>', "<span class='emph'>" + (isFinite(targetPercent) ? targetPercent : '--') + '%</span> of ', d.target.name, 'target', '</div>', ].join(''); } return html; } function onmouseover(d) { tooltip .html(function () { return getTooltipHtml(d); }) .transition() .duration(200) .style('left', (d3.event.offsetX + 10) + 'px') .style('top', (d3.event.offsetY + 10) + 'px') .style('opacity', 0.95); } function onmouseout() { tooltip.transition() .duration(100) .style('opacity', 0); } const link = svg.append('g').selectAll('.link') .data(links) .enter() .append('path') .attr('class', 'link') .attr('d', path) .style('stroke-width', d => Math.max(1, d.dy)) .sort((a, b) => b.dy - a.dy) .on('mouseover', onmouseover) .on('mouseout', onmouseout); function dragmove(d) { d3.select(this) .attr( 'transform', `translate(${d.x},${(d.y = Math.max(0, Math.min(height - d.dy, d3.event.y)))})`, ); sankey.relayout(); link.attr('d', path); } const node = svg.append('g').selectAll('.node') .data(nodes) .enter() .append('g') .attr('class', 'node') .attr('transform', function (d) { return 'translate(' + d.x + ',' + d.y + ')'; }) .call(d3.behavior.drag() .origin(function (d) { return d; }) .on('dragstart', function () { this.parentNode.appendChild(this); }) .on('drag', dragmove), ); const minRectHeight = 5; node.append('rect') .attr('height', d => d.dy > minRectHeight ? d.dy : minRectHeight) .attr('width', sankey.nodeWidth()) .style('fill', function (d) { const name = d.name || 'N/A'; d.color = getColorFromScheme(name.replace(/ .*/, ''), slice.formData.color_scheme); return d.color; }) .style('stroke', function (d) { return d3.rgb(d.color).darker(2); }) .on('mouseover', onmouseover) .on('mouseout', onmouseout); node.append('text') .attr('x', -6) .attr('y', function (d) { return d.dy / 2; }) .attr('dy', '.35em') .attr('text-anchor', 'end') .attr('transform', null) .text(function (d) { return d.name; }) .filter(function (d) { return d.x < width / 2; }) .attr('x', 6 + sankey.nodeWidth()) .attr('text-anchor', 'start'); } module.exports = sankeyVis; |