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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 | 1× 1× 1× 1× 1× | /* eslint-disable no-shadow, no-param-reassign, no-underscore-dangle, no-use-before-define */ import d3 from 'd3'; import { getColorFromScheme } from '../modules/colors'; require('./treemap.css'); /* Modified from http://bl.ocks.org/ganeshv/6a8e9ada3ab7f2d88022 */ function treemap(slice, payload) { const div = d3.select(slice.selector); const _draw = function (data, eltWidth, eltHeight, formData) { const margin = { top: 0, right: 0, bottom: 0, left: 0 }; const navBarHeight = 36; const navBarTitleSize = navBarHeight / 3; const navBarBuffer = 10; const width = eltWidth - margin.left - margin.right; const height = (eltHeight - navBarHeight - navBarBuffer - margin.top - margin.bottom); const formatNumber = d3.format(formData.number_format); let transitioning; const x = d3.scale.linear() .domain([0, width]) .range([0, width]); const y = d3.scale.linear() .domain([0, height]) .range([0, height]); const treemap = d3.layout.treemap() .children(function (d, depth) { return depth ? null : d._children; }) .sort(function (a, b) { return a.value - b.value; }) .ratio(formData.treemap_ratio) .mode('squarify') .round(false); const svg = div.append('svg') .attr('class', 'treemap') .attr('width', eltWidth) .attr('height', eltHeight); const chartContainer = svg.append('g') .attr('transform', 'translate(' + margin.left + ',' + (margin.top + navBarHeight + navBarBuffer) + ')') .style('shape-rendering', 'crispEdges'); const grandparent = svg.append('g') .attr('class', 'grandparent') .attr('transform', 'translate(0,' + (margin.top + (navBarBuffer / 2)) + ')'); grandparent.append('rect') .attr('width', width) .attr('height', navBarHeight); grandparent.append('text') .attr('x', width / 2) .attr('y', (navBarHeight / 2) + (navBarTitleSize / 2)) .style('font-size', navBarTitleSize + 'px') .style('text-anchor', 'middle'); const initialize = function (root) { root.x = 0; root.y = 0; root.dx = width; root.dy = height; root.depth = 0; }; // Aggregate the values for internal nodes. This is normally done by the // treemap layout, but not here because of our custom implementation. // We also take a snapshot of the original children (_children) to avoid // the children being overwritten when when layout is computed. const accumulate = function (d) { d._children = d.children; if (d._children) { d.value = d.children.reduce(function (p, v) { return p + accumulate(v); }, 0); } return d.value; }; // Compute the treemap layout recursively such that each group of siblings // uses the same size (1x1) rather than the dimensions of the parent cell. // This optimizes the layout for the current zoom state. Note that a wrapper // object is created for the parent node for each group of siblings so that // the parents dimensions are not discarded as we recurse. Since each group // of sibling was laid out in 1x1, we must rescale to fit using absolute // coordinates. This lets us use a viewport to zoom. const layout = function (d) { if (d._children) { treemap.nodes({ _children: d._children }); d._children.forEach(function (c) { c.x = d.x + (c.x * d.dx); c.y = d.y + (c.y * d.dy); c.dx *= d.dx; c.dy *= d.dy; c.parent = d; layout(c); }); } }; const display = function (d) { const transition = function (d) { if (transitioning || !d) { return; } transitioning = true; const g2 = display(d); const t1 = g1.transition().duration(750); const t2 = g2.transition().duration(750); // Update the domain only after entering new elements. x.domain([d.x, d.x + d.dx]); y.domain([d.y, d.y + d.dy]); // Enable anti-aliasing during the transition. chartContainer.style('shape-rendering', null); // Draw child nodes on top of parent nodes. chartContainer.selectAll('.depth').sort(function (a, b) { return a.depth - b.depth; }); // Fade-in entering text. g2.selectAll('text').style('fill-opacity', 0); // Transition to the new view. t1.selectAll('.ptext').call(text).style('fill-opacity', 0); t1.selectAll('.ctext').call(text2).style('fill-opacity', 0); t2.selectAll('.ptext').call(text).style('fill-opacity', 1); t2.selectAll('.ctext').call(text2).style('fill-opacity', 1); t1.selectAll('rect').call(rect); t2.selectAll('rect').call(rect); // Remove the old node when the transition is finished. t1.remove().each('end', function () { chartContainer.style('shape-rendering', 'crispEdges'); transitioning = false; }); }; grandparent .datum(d.parent) .on('click', transition) .select('text') .text(name(d)); const g1 = chartContainer.append('g') .datum(d) .attr('class', 'depth'); const g = g1.selectAll('g') .data(d._children) .enter() .append('g'); g.filter(function (d) { return d._children; }) .classed('children', true) .on('click', transition); const children = g.selectAll('.child') .data(function (d) { return d._children || [d]; }) .enter() .append('g'); children.append('rect') .attr('class', 'child') .call(rect) .append('title') .text(function (d) { return d.name + ' (' + formatNumber(d.value) + ')'; }); children.append('text') .attr('class', 'ctext') .text(function (d) { return d.name; }) .call(text2); g.append('rect') .attr('class', 'parent') .call(rect); const t = g.append('text') .attr('class', 'ptext') .attr('dy', '.75em'); t.append('tspan') .text(function (d) { return d.name; }); t.append('tspan') .attr('dy', '1.0em') .text(function (d) { return formatNumber(d.value); }); t.call(text); g.selectAll('rect') .style('fill', function (d) { return getColorFromScheme(d.name, formData.color_scheme); }); return g; }; const text = function (selection) { selection.selectAll('tspan') .attr('x', function (d) { return x(d.x) + 6; }); selection.attr('x', function (d) { return x(d.x) + 6; }) .attr('y', function (d) { return y(d.y) + 6; }) .style('opacity', function (d) { return this.getComputedTextLength() < x(d.x + d.dx) - x(d.x) ? 1 : 0; }); }; const text2 = function (selection) { selection.attr('x', function (d) { return x(d.x + d.dx) - this.getComputedTextLength() - 6; }) .attr('y', function (d) { return y(d.y + d.dy) - 6; }) .style('opacity', function (d) { return this.getComputedTextLength() < x(d.x + d.dx) - x(d.x) ? 1 : 0; }); }; const rect = function (selection) { selection.attr('x', function (d) { return x(d.x); }) .attr('y', function (d) { return y(d.y); }) .attr('width', function (d) { return x(d.x + d.dx) - x(d.x); }) .attr('height', function (d) { return y(d.y + d.dy) - y(d.y); }); }; const name = function (d) { return d.parent ? name(d.parent) + ' / ' + d.name + ' (' + formatNumber(d.value) + ')' : (slice.datasource.verbose_map[d.name] || d.name) + ' (' + formatNumber(d.value) + ')'; }; initialize(data); accumulate(data); layout(data); display(data); }; div.selectAll('*').remove(); const width = slice.width(); const height = slice.height() / payload.data.length; for (let i = 0, l = payload.data.length; i < l; i += 1) { _draw(payload.data[i], width, height, slice.formData); } } module.exports = treemap; |