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266 lines
7.4 KiB
266 lines
7.4 KiB
3 years ago
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/* ------------------------------------------------------------------------------
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*
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* # D3.js - line chart with pan and zoom
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*
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* Demo d3.js line chart setup with pan and zoom
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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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panZoom('#d3-pan-zoom', 400);
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// Chart setup
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function panZoom(element, height) {
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// Basic setup
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// ------------------------------
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// Demo data set
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var data = [
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[{'x':1,'y':0},{'x':2,'y':5},{'x':3,'y':10},{'x':4,'y':0},{'x':5,'y':6},{'x':6,'y':11},{'x':7,'y':9},{'x':8,'y':4},{'x':9,'y':11},{'x':10,'y':2}],
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[{'x':1,'y':1},{'x':2,'y':6},{'x':3,'y':11},{'x':4,'y':1},{'x':5,'y':7},{'x':6,'y':12},{'x':7,'y':8},{'x':8,'y':3},{'x':9,'y':13},{'x':10,'y':3}],
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[{'x':1,'y':2},{'x':2,'y':7},{'x':3,'y':12},{'x':4,'y':2},{'x':5,'y':8},{'x':6,'y':13},{'x':7,'y':7},{'x':8,'y':2},{'x':9,'y':4},{'x':10,'y':7}]
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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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// Colors
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var colors = ['#EF5350', '#5C6BC0', '#66BB6A']
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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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.domain([0, 11])
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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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.domain([-1, 14])
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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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.tickSize(-height)
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.tickPadding(10)
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.tickSubdivide(true)
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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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.tickPadding(10)
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.tickSize(-width)
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.tickSubdivide(true)
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.orient("left");
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// Add zoom
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// ------------------------------
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var zoom = d3.behavior.zoom()
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.x(x)
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.y(y)
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.scaleExtent([1, 10])
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.on("zoom", zoomed);
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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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.call(zoom)
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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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// Line
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var line = d3.svg.line()
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.interpolate("monotone")
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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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//
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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 d3-grid")
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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 d3-grid")
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.call(yAxis);
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// Append line
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// ------------------------------
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// Add clip path
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svg.append("clipPath")
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.attr("id", "zoom-clip")
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.append("rect")
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.attr("width", width)
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.attr("height", height);
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// Add line
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var path = svg.selectAll('.d3-line')
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.data(data)
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.enter()
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.append("path")
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.attr("d", line)
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.attr("class", "d3-line d3-line-medium")
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.attr("clip-path", "url(#zoom-clip)")
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.style('stroke', function(d,i){
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return colors[i%colors.length];
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});
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// Append dots
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// ------------------------------
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// Group dots
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var points = svg.selectAll('.d3-dots')
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.data(data)
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.enter()
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.append("g")
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.attr("class", "d3-dots")
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.attr("clip-path", "url(#clip)");
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// Add dots
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points.selectAll('.d3-dot')
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.data(function(d, index) {
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var a = [];
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d.forEach(function(point,i) {
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a.push({'index': index, 'point': point});
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});
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return a;
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})
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.enter()
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.append('circle')
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.attr('class', 'd3-dot')
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.attr("r", 3)
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.attr("transform", function(d) {
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return "translate(" + x(d.point.x) + "," + y(d.point.y) + ")"; }
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)
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.style("fill", "#fff")
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.style("stroke-width", 2)
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.style('stroke', function(d,i){
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return colors[d.index%colors.length];
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})
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.style("cursor", "pointer");
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// Update elements on zoom
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// ------------------------------
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function zoomed() {
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svg.select(".d3-axis-horizontal").call(xAxis);
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svg.select(".d3-axis-vertical").call(yAxis);
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svg.selectAll('.d3-line').attr('d', line);
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points.selectAll('.d3-dot').attr("transform", function(d) {
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return "translate(" + x(d.point.x) + "," + y(d.point.y) + ")"; }
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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.range([0, width]);
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// Horizontal axis
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svg.selectAll('.d3-axis-horizontal').call(xAxis);
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svg.selectAll('.d3-axis-vertical').call(yAxis.tickSize(-width));
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// Chart elements
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// -------------------------
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// Mask
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svg.select('#zoom-clip rect').attr("width", width);
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// Line path
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svg.selectAll('.d3-line').attr("d", line);
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// Dots
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points.selectAll('.d3-dot').attr("transform", function(d) {
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return "translate(" + x(d.point.x) + "," + y(d.point.y) + ")"; }
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);
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}
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}
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});
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