d3
Version:
A small, free JavaScript library for manipulating documents based on data.
120 lines (94 loc) • 2.81 kB
HTML
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>Zoom + Pan</title>
<script type="text/javascript" src="../../d3.js"></script>
<script type="text/javascript" src="../../d3.behavior.js"></script>
<style type="text/css">
svg {
font: 10px sans-serif;
shape-rendering: crispEdges;
}
</style>
</head>
<body>
<script type="text/javascript">
var size = [710, 500], // width height
padding = [4, 4, 20, 40], // top right bottom left
tx = function(d) { return "translate(" + x(d) + ",0)"; },
ty = function(d) { return "translate(0," + y(d) + ")"; },
stroke = function(d) { return d ? "#ccc" : "#666"; };
// x-scale (1.42 = 710/500)
var x = d3.scale.linear()
.domain([-1.42, +1.42])
.range([0, size[0]]);
// y-scale (inverted domain)
var y = d3.scale.linear()
.domain([+1.00, -1.00])
.range([0, size[1]]);
var svg = d3.select("body").append("svg:svg")
.attr("width", size[0] + padding[3] + padding[1])
.attr("height", size[1] + padding[0] + padding[2])
.attr("pointer-events", "all")
.append("svg:g")
.attr("transform", "translate(" + padding[3] + "," + padding[0] + ")")
.call(d3.behavior.zoom().on("zoom", redraw));
svg.append("svg:rect")
.attr("width", size[0])
.attr("height", size[1])
.attr("stroke", "none")
.style("fill", "#fff");
svg.append("svg:a")
.attr("xlink:href", "http://mbostock.github.com/d3/")
.append("svg:text")
.style("font-size", "3em")
.attr("transform", "translate(110.5, 110.5)")
.text("D3.js");
redraw();
function redraw() {
if (d3.event) d3.event.transform(x, y);
var fx = x.tickFormat(10),
fy = y.tickFormat(10);
// Regenerate x-ticks…
var gx = svg.selectAll("g.x")
.data(x.ticks(10), String)
.attr("transform", tx);
gx.select("text")
.text(fx);
var gxe = gx.enter().insert("svg:g", "a")
.attr("class", "x")
.attr("transform", tx);
gxe.append("svg:line")
.attr("stroke", stroke)
.attr("y1", 0)
.attr("y2", size[1]);
gxe.append("svg:text")
.attr("y", size[1])
.attr("dy", "1em")
.attr("text-anchor", "middle")
.text(fx);
gx.exit().remove();
// Regenerate y-ticks…
var gy = svg.selectAll("g.y")
.data(y.ticks(10), String)
.attr("transform", ty);
gy.select("text")
.text(fy);
var gye = gy.enter().insert("svg:g", "a")
.attr("class", "y")
.attr("transform", ty);
gye.append("svg:line")
.attr("stroke", stroke)
.attr("x1", 0)
.attr("x2", size[0]);
gye.append("svg:text")
.attr("x", -3)
.attr("dy", ".35em")
.attr("text-anchor", "end")
.text(fy);
gy.exit().remove();
}
</script>
</body>
</html>