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291 lines
8.9 KiB
291 lines
8.9 KiB
/* ------------------------------------------------------------------------------ |
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* |
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* # D3.js - stacked and multiple bars |
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* |
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* Demo d3.js bar chart setup with animated transition between stacked and multiple bars |
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* |
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* Version: 1.0 |
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* Latest update: August 1, 2015 |
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* |
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* ---------------------------------------------------------------------------- */ |
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$(function () { |
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// Create Uniform checkbox |
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$(".stacked-multiple").uniform({ |
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radioClass: 'choice' |
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}); |
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// Initialize chart |
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stackedMultiples('#d3-bar-stacked-multiples', 400); |
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// Chart setup |
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function stackedMultiples(element, height) { |
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// Basic setup |
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// ------------------------------ |
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// Define main variables |
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var d3Container = d3.select(element), |
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margin = {top: 5, right: 20, bottom: 20, left: 60}, |
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width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right, |
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height = height - margin.top - margin.bottom - 5; |
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// Format data |
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var parseDate = d3.time.format("%Y-%m").parse, |
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formatYear = d3.format("02d"), |
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formatDate = function(d) { return "Q" + ((d.getMonth() / 3 | 0) + 1) + formatYear(d.getFullYear() % 100); }; |
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// Construct scales |
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// ------------------------------ |
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// Horizontal |
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var x = d3.scale.ordinal() |
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.rangeRoundBands([0, width], .2); |
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// Vertical |
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var y = d3.scale.ordinal() |
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.rangeRoundBands([height, 0]); |
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var y0 = d3.scale.ordinal() |
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.rangeRoundBands([height, 0]); |
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var y1 = d3.scale.linear(); |
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// Colors |
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var color = d3.scale.category20(); |
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// Create axes |
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// ------------------------------ |
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// Horizontal |
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var xAxis = d3.svg.axis() |
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.scale(x) |
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.orient("bottom") |
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.tickFormat(formatDate); |
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// Vertical |
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var yAxis = d3.svg.axis() |
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.scale(y) |
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.orient("left") |
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.ticks(10, "%"); |
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// Create chart |
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// ------------------------------ |
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// Add SVG element |
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var container = d3Container.append("svg"); |
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// Add SVG group |
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var svg = container |
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.attr("width", width + margin.left + margin.right) |
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.attr("height", height + margin.top + margin.bottom) |
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.append("g") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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// Construct chart layout |
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// ------------------------------ |
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// Nest |
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var nest = d3.nest() |
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.key(function(d) { return d.browser; }); |
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// Stack |
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var stack = d3.layout.stack() |
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.values(function(d) { return d.values; }) |
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.x(function(d) { return d.date; }) |
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.y(function(d) { return d.value; }) |
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.out(function(d, y0) { d.valueOffset = y0; }); |
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// Load data |
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// ------------------------------ |
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d3.tsv("assets/demo_data/d3/bars/bars_stacked_multiple.tsv", function(error, data) { |
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// Pull out values |
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data.forEach(function(d) { |
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d.date = parseDate(d.date); |
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d.value = +d.value; |
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}); |
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// Nest values |
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var dataByGroup = nest.entries(data); |
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// Set input domains |
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// ------------------------------ |
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// Stack |
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stack(dataByGroup); |
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// Horizontal |
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x.domain(dataByGroup[0].values.map(function(d) { return d.date; })); |
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// Vertical |
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y0.domain(dataByGroup.map(function(d) { return d.key; })); |
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y1.domain([0, d3.max(data, function(d) { return d.value; })]).range([y0.rangeBand(), 0]); |
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// |
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// Append chart elements |
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// |
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// Add bars |
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// ------------------------------ |
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// Group bars |
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var group = svg.selectAll(".d3-bar-group") |
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.data(dataByGroup) |
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.enter() |
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.append("g") |
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.attr("class", "d3-bar-group") |
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.attr("transform", function(d) { return "translate(0," + y0(d.key) + ")"; }); |
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// Append text |
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group.append("text") |
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.attr("class", "d3-group-label") |
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.attr("x", -12) |
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.attr("y", function(d) { return y1(d.values[0].value / 2); }) |
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.attr("dy", ".35em") |
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.style("text-anchor", "end") |
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.text(function(d) { return d.key; }); |
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// Add bars |
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group.selectAll(".d3-bar") |
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.data(function(d) { return d.values; }) |
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.enter() |
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.append("rect") |
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.attr("class", "d3-bar") |
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.attr("x", function(d) { return x(d.date); }) |
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.attr("y", function(d) { return y1(d.value); }) |
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.attr("width", x.rangeBand()) |
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.attr("height", function(d) { return y0.rangeBand() - y1(d.value); }) |
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.style("fill", function(d) { return color(d.browser); }); |
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// Append axes |
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// ------------------------------ |
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// Horizontal |
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group.filter(function(d, i) { return !i; }).append("g") |
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.attr("class", "d3-axis d3-axis-horizontal d3-axis-strong") |
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.attr("transform", "translate(0," + (y0.rangeBand() + 1) + ")") |
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.call(xAxis); |
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// Vertical |
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var verticalAxis = svg.append("g") |
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.attr("class", "d3-axis d3-axis-vertical d3-axis-strong") |
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.call(yAxis); |
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// Appent text label |
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verticalAxis.append("text") |
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.attr('class', 'browser-label') |
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.attr("x", -12) |
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.attr("y", 12) |
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.attr("dy", ".71em") |
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.style("text-anchor", "end") |
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.style("fill", "#999") |
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.style("font-size", 12) |
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.text("Browser"); |
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// Setup layout change |
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// ------------------------------ |
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// Add change event |
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d3.selectAll(".stacked-multiple").on("change", change); |
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// Change value on page load |
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var timeout = setTimeout(function() { |
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d3.select("input[value=\"stacked\"]").property("checked", true).each(change); |
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$.uniform.update(); |
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}, 2000); |
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// Change function |
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function change() { |
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clearTimeout(timeout); |
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if (this.value === "multiples") transitionMultiples(); |
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else transitionStacked(); |
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} |
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// Transition to multiples |
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function transitionMultiples() { |
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var t = svg.transition().duration(750), |
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g = t.selectAll(".d3-bar-group").attr("transform", function(d) { return "translate(0," + y0(d.key) + ")"; }); |
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g.selectAll(".d3-bar").attr("y", function(d) { return y1(d.value); }); |
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g.select(".d3-group-label").attr("y", function(d) { return y1(d.values[0].value / 2); }) |
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} |
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// Transition to stacked |
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function transitionStacked() { |
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var t = svg.transition().duration(750), |
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g = t.selectAll(".d3-bar-group").attr("transform", "translate(0," + y0(y0.domain()[0]) + ")"); |
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g.selectAll(".d3-bar").attr("y", function(d) { return y1(d.value + d.valueOffset) }); |
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g.select(".d3-group-label").attr("y", function(d) { return y1(d.values[0].value / 2 + d.values[0].valueOffset); }) |
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} |
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}); |
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// Resize chart |
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// ------------------------------ |
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// Call function on window resize |
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$(window).on('resize', resize); |
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// Call function on sidebar width change |
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$('.sidebar-control').on('click', resize); |
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// Resize function |
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// |
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// Since D3 doesn't support SVG resize by default, |
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// we need to manually specify parts of the graph that need to |
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// be updated on window resize |
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function resize() { |
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// Layout variables |
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width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right; |
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// Layout |
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// ------------------------- |
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// Main svg width |
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container.attr("width", width + margin.left + margin.right); |
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// Width of appended group |
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svg.attr("width", width + margin.left + margin.right); |
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// Axes |
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// ------------------------- |
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// Horizontal range |
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x.rangeRoundBands([0, width], .2); |
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// Horizontal axis |
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svg.selectAll('.d3-axis-horizontal').call(xAxis); |
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// Chart elements |
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// ------------------------- |
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// Line path |
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svg.selectAll('.d3-bar').attr("x", function(d) { return x(d.date); }).attr("width", x.rangeBand()); |
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} |
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} |
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});
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