214 lines
5.4 KiB
JavaScript
214 lines
5.4 KiB
JavaScript
/* ------------------------------------------------------------------------------
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*
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* # D3.js - area chart with missing data
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*
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* Demo d3.js area chart setup with tooltip and missing data
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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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// Initialize chart
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areaMissing('#d3-missing-data', 400);
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// Chart setup
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function areaMissing(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: 40},
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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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// Data set
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var data = d3.range(60).map(function(i) {
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return {x: i / 59, y: i % 5 ? (Math.sin(i / 3) + 2) / 4 : null};
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});
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// Construct scales
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// ------------------------------
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// Horizontal
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var x = d3.scale.linear()
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.range([0, width]);
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// Vertical
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var y = d3.scale.linear()
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.range([height, 0]);
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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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// 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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// Add tooltip
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var tip = d3.tip()
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.attr('class', 'd3-tip')
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.offset([-10, 0])
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.html(function(d) {
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return d.x;
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});
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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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.datum(data)
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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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.call(tip);
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// Construct chart layout
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// ------------------------------
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// Line
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var line = d3.svg.line()
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.defined(function(d) { return d.y != null; })
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.x(function(d) { return x(d.x); })
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.y(function(d) { return y(d.y); });
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// Area
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var area = d3.svg.area()
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.defined(line.defined())
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.x(line.x())
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.y1(line.y())
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.y0(y(0));
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//
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// Append chart elements
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//
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// Append axes
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// ------------------------------
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// Horizontal
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svg.append("g")
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.attr("class", "d3-axis d3-axis-horizontal d3-axis-strong")
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.attr("transform", "translate(0," + height + ")")
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.call(xAxis);
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// Vertical
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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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// Chart elements
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// ------------------------------
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// Add area
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svg.append("path")
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.attr("class", "d3-area")
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.attr("d", area)
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.style("fill", "#81C784");
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// Add line
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svg.append("path")
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.attr("class", "d3-line d3-line-medium")
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.attr("d", line)
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.style("stroke", "#43A047");
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// Add dots
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svg.selectAll(".d3-dot")
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.data(data.filter(function(d) { return d.y; }))
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.enter()
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.append("circle")
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.attr("class", "d3-dot")
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.attr("cx", line.x())
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.attr("cy", line.y())
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.attr("r", 3)
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.style("fill", "#fff")
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.style("stroke", "#43A047")
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.style("stroke-width", 1.5)
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.on('mouseover', tip.show)
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.on('mouseout', tip.hide);
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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.range([0, width]);
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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-line').attr("d", line);
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// Area path
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svg.selectAll('.d3-area').attr("d", area);
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// Dots
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svg.selectAll('.d3-dot').attr("cx", line.x());
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}
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}
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});
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