/* ------------------------------------------------------------------------------
*
* # D3.js - line chart with chained transitions
*
* Demo d3.js line chart setup with chained transitions and .tsv data source
*
* Version: 1.0
* Latest update: August 1, 2015
*
* ---------------------------------------------------------------------------- */
$(function () {
// Create Uniform checkbox
$(".chained").uniform({
radioClass: 'choice',
wrapperClass: 'border-teal'
});
// Initialize chart
chainedTransitions('#d3-chained-transitions', 400);
// Chart setup
function chainedTransitions(element, height) {
// Basic setup
// ------------------------------
// Define main variables
var d3Container = d3.select(element),
margin = {top: 5, right: 90, bottom: 20, left: 40},
width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right,
height = height - margin.top - margin.bottom - 5;
// City name
var city = "New York";
// Format data
parseDate = d3.time.format("%Y%m%d").parse;
// Construct scales
// ------------------------------
// Horizontal
var x = d3.time.scale()
.range([0, width]);
// Vertical
var y = d3.scale.linear()
.range([height, 0]);
// Create axes
// ------------------------------
// Horizontal
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(6)
.tickFormat(d3.time.format("%b"));
// Vertical
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
// Create chart
// ------------------------------
// Add SVG element
var container = d3Container.append("svg");
// Add SVG group
var svg = container
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// Construct chart layout
// ------------------------------
// Line
var line = d3.svg.line()
.interpolate("basis")
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d[city]); });
// Load data
// ------------------------------
d3.tsv("assets/demo_data/d3/lines/lines_transitions.tsv", function(error, data) {
// Pull out values
data.forEach(function(d) {
d.date = parseDate(d.date);
d["New York"] = +d["New York"];
d["San Francisco"] = +d["San Francisco"];
});
// Set input domains
// ------------------------------
// Horizontal
x.domain([data[0].date, data[data.length - 1].date]);
// Vertical
y.domain(d3.extent(data, function(d) { return d[city]; }));
//
// Append chart elements
//
// Add line
svg.append("path")
.datum(data)
.attr("d", line)
.attr("class", "d3-line d3-line-medium")
.style("stroke", "#FF5722");
// Add text
svg.append("text")
.datum(data[data.length - 1])
.attr("class", "d3-city")
.attr("transform", transform)
.attr("x", 3)
.attr("dy", ".35em")
.text(city);
// Append axes
// ------------------------------
// Horizontal
svg.append("g")
.attr("class", "d3-axis d3-axis-horizontal d3-axis-strong")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
// Vertical
var verticalAxis = svg.append("g")
.attr("class", "d3-axis d3-axis-vertical d3-axis-strong")
.call(yAxis);
// Add text label
verticalAxis.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 10)
.attr("dy", ".71em")
.style("text-anchor", "end")
.style("fill", "#999")
.style("font-size", 12)
.text("Temperature (ºF)");
// Transitions
// ------------------------------
// Do stuff on value change
d3.selectAll(".chained").on("change", change);
// Set timeout for auto change
var timeout = setTimeout(function() {
d3.select("input[value=\"San Francisco\"]").property("checked", true).each(change);
$.uniform.update();
}, 3000);
// Change function
function change() {
clearTimeout(timeout);
city = this.value;
// First transition the line & label to the new city.
var t0 = svg.transition().duration(750);
t0.selectAll(".d3-line").attr("d", line);
t0.selectAll(".d3-city").attr("transform", transform).text(city);
// Then transition the y-axis.
y.domain(d3.extent(data, function(d) { return d[city]; }));
var t1 = t0.transition();
t1.selectAll(".d3-line").attr("d", line);
t1.selectAll(".d3-city").attr("transform", transform);
t1.selectAll(".d3-axis-vertical").call(yAxis);
}
// Transform text
function transform(d) {
return "translate(" + x(d.date) + "," + y(d[city]) + ")";
}
// Resize chart
// ------------------------------
// Call function on window resize
$(window).on('resize', resize);
// Call function on sidebar width change
$('.sidebar-control').on('click', resize);
// Resize function
//
// Since D3 doesn't support SVG resize by default,
// we need to manually specify parts of the graph that need to
// be updated on window resize
function resize() {
// Layout variables
width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right;
// Layout
// -------------------------
// Main svg width
container.attr("width", width + margin.left + margin.right);
// Width of appended group
svg.attr("width", width + margin.left + margin.right);
// Axes
// -------------------------
// Horizontal range
x.range([0, width]);
// Horizontal axis
svg.selectAll('.d3-axis-horizontal').call(xAxis);
// Chart elements
// -------------------------
// Line path
svg.selectAll('.d3-line').attr("d", line);
// Text
svg.selectAll(".d3-city").attr("transform", transform);
}
});
}
});