/* ------------------------------------------------------------------------------ * * # D3.js - spline transition * * Demo d3.js line chart setup with spline transition * * Version: 1.0 * Latest update: August 1, 2015 * * ---------------------------------------------------------------------------- */ $(function () { // Initialize chart splineTrransition('#d3-spline-transition', 400); // Chart setup function splineTrransition(element, height) { // Basic setup // ------------------------------ // Define main variables var d3Container = d3.select(element), margin = {top: 5, right: 5, bottom: 5, left: 30}, width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right, height = height - margin.top - margin.bottom - 5; // Add data var n = 50, random = d3.random.normal(0, .35), data = d3.range(n).map(random); // Construct scales // ------------------------------ // Horizontal var x = d3.scale.linear() .domain([1, n - 2]) .range([0, width]); // Vertical var y = d3.scale.linear() .domain([-1, 1]) .range([height, 0]); // Create axes // ------------------------------ // Horizontal var xAxis = d3.svg.axis() .scale(x) .orient("bottom"); // 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, i) { return x(i); }) .y(function(d, i) { return y(d); }); // // Append chart elements // // Add mask svg.append("defs") .append("clipPath") .attr("id", "transition-clip") .append("rect") .attr("width", width) .attr("height", height); // Append axes // ------------------------------ // Horizontal svg.append("g") .attr("class", "d3-axis d3-axis-horizontal d3-axis-strong") .attr("transform", "translate(0," + y(0) + ")") .call(xAxis); // Vertical svg.append("g") .attr("class", "d3-axis d3-axis-vertical d3-axis-strong") .call(yAxis); // Add line var path = svg.append("g") .attr("clip-path", "url(#transition-clip)") .append("path") .datum(data) .attr("d", line) .attr("class", "d3-line d3-line-medium") .style("stroke", "#607D8B"); // Transition // ------------------------------ // Initialize transition tick(); // Setup transition function tick() { // push a new data point onto the back data.push(random()); // redraw the line, and slide it to the left path .attr("d", line) .attr("transform", null) .transition() .duration(500) .ease("linear") .attr("transform", "translate(" + x(0) + ",0)") .each("end", tick); // pop the old data point off the front data.shift(); } // 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); // Crosshair svg.selectAll('#transition-clip rect').attr("width", width); } } });