Created
May 27, 2013 07:28
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practica zoom & Brush con D3
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> | |
| <title>Brush</title> | |
| <script type="text/javascript" | |
| src="http://mbostock.github.com/d3/d3.js"></script> | |
| <style type="text/css"> | |
| svg { font: 10px sans-serif;shape-rendering: crispEdges; } | |
| rect { fill: #ddd; } | |
| circle { -webkit-transition: fill-opacity 250ms linear; } | |
| .selecting circle { fill-opacity: .2; } | |
| .selecting circle.selected { stroke: #f00; } | |
| .axis path, .axis line { | |
| fill: none; stroke: #fff; | |
| shape-rendering: crispEdges; | |
| } | |
| .brush .extent { | |
| stroke: #fff; fill-opacity: .125; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var color = d3.scale.category20(); | |
| var xMax = 400, | |
| yMax = 200; | |
| var random = d3.random.normal(.5, .1), | |
| data = d3.range(800).map(function() { | |
| return [random()*xMax, random()*yMax]; }); | |
| var margin = {top: 10, right: 10, bottom: 20, left: 40}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var x = d3.scale.linear() | |
| .domain([0, xMax]) | |
| .range([0, width]); | |
| var y = d3.scale.linear() | |
| .domain([0, yMax]) | |
| .range([height, 0]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom") | |
| .tickSize(-height); | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left") | |
| .ticks(5) | |
| .tickSize(-width); | |
| var zm = d3.behavior.zoom().x(x).y(y) | |
| .scaleExtent([1,8]).on("zoom", zoom); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", | |
| "translate(" + margin.left + "," + margin.top + ")") | |
| .call(zm); | |
| svg.append("rect") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(yAxis); | |
| draw(); | |
| svg.append("g") | |
| .attr("class", "brush") | |
| .call(d3.svg.brush().x(x).y(y) | |
| .on("brushstart", brushstart) | |
| .on("brush", brush) | |
| .on("brushend", brushend)); | |
| function brushstart() { | |
| svg.classed("selecting", true); | |
| } | |
| function draw() { | |
| vis=svg.append("g") | |
| .selectAll("circle") | |
| .data(data) | |
| .enter().append("circle") | |
| .attr("transform", function(d) { | |
| return "translate(" + x(d[0]) + "," + y(d[1]) + ")"; }) | |
| .attr("r", 3.5); | |
| } | |
| function update() { | |
| svg.selectAll("circle") | |
| .attr("transform", function(d) { | |
| return "translate(" + x(d[0]) + "," + y(d[1]) + ")"; }) | |
| .attr("r", zm.scale()*3) | |
| .attr("fill",function(d,i){return color(i);}); | |
| } | |
| function brush() { | |
| var e = d3.event.target.extent(); | |
| svg.selectAll("circle").classed("selected", function(d) { | |
| return e[0][0] <= d[0] && d[0] <= e[1][0] | |
| && e[0][1] <= d[1] && d[1] <= e[1][1]; | |
| }); | |
| } | |
| function brushend() { | |
| svg.classed("selecting", !d3.event.target.empty()); | |
| } | |
| function zoom() { | |
| svg.select(".x.axis").call(xAxis); | |
| svg.select(".y.axis").call(yAxis); | |
| update(); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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