|
<!DOCTYPE html> |
|
<meta charset="utf-8"> |
|
<title>Simple Independent Axis Zooms on x, y, or xy</title> |
|
<script src="http://d3js.org/d3.v3.min.js"></script> |
|
<style> |
|
.axis path, .axis line { |
|
fill: none; |
|
stroke: #000; |
|
shape-rendering: crispEdges; |
|
} |
|
</style> |
|
<body> |
|
<div id="chart"></div> |
|
<script> |
|
var exampleChart = example(); |
|
|
|
var data = []; |
|
for (var i = 0; i < 100; i++) { |
|
data.push([Math.random(), Math.random()]); |
|
} |
|
d3.select('#chart') |
|
.append("svg").attr("width", window.innerWidth).attr("height",window.innerHeight) |
|
.datum(data).call(exampleChart); |
|
|
|
function example() { |
|
var svg; |
|
var margin = { |
|
top: 60, |
|
bottom: 80, |
|
left: 60, |
|
right: 0 |
|
}; |
|
var width = 500; |
|
var height = 400; |
|
var xaxis = d3.svg.axis(); |
|
var yaxis = d3.svg.axis(); |
|
var xscale = d3.scale.linear(); |
|
var yscale = d3.scale.linear(); |
|
var xyzoom, xzoom, yzoom; |
|
updateZooms(); |
|
|
|
function chart(selection) { |
|
selection.each(function(data) { |
|
svg = d3.select(this).selectAll('svg').data([data]); |
|
svg.enter().append('svg'); |
|
var g = svg.append('g') |
|
.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
|
|
|
g.append("defs").append("clipPath") |
|
.attr("id", "clip") |
|
.append("rect") |
|
.attr("width", width - margin.left - margin.right) |
|
.attr("height", height - margin.top - margin.bottom); |
|
|
|
g.append("svg:rect") |
|
.attr("class", "border") |
|
.attr("width", width - margin.left - margin.right) |
|
.attr("height", height - margin.top - margin.bottom) |
|
.style("stroke", "black") |
|
.style("fill", "none"); |
|
|
|
g.append("g").attr("class", "x axis") |
|
.attr("transform", "translate(" + 0 + "," + (height - margin.top - margin.bottom) + ")"); |
|
|
|
g.append("g").attr("class", "y axis"); |
|
|
|
g.append("g") |
|
.attr("class", "scatter") |
|
.attr("clip-path", "url(#clip)"); |
|
|
|
g |
|
.append("svg:rect") |
|
.attr("class", "zoom xy box") |
|
.attr("width", width - margin.left - margin.right) |
|
.attr("height", height - margin.top - margin.bottom) |
|
.style("visibility", "hidden") |
|
.attr("pointer-events", "all") |
|
.call(xyzoom); |
|
|
|
g |
|
.append("svg:rect") |
|
.attr("class", "zoom x box") |
|
.attr("width", width - margin.left - margin.right) |
|
.attr("height", height - margin.top - margin.bottom) |
|
.attr("transform", "translate(" + 0 + "," + (height - margin.top - margin.bottom) + ")") |
|
.style("visibility", "hidden") |
|
.attr("pointer-events", "all") |
|
.call(xzoom); |
|
|
|
g |
|
.append("svg:rect") |
|
.attr("class", "zoom y box") |
|
.attr("width", margin.left) |
|
.attr("height", height - margin.top - margin.bottom) |
|
.attr("transform", "translate(" + -margin.left + "," + 0 + ")") |
|
.style("visibility", "hidden") |
|
.attr("pointer-events", "all") |
|
.call(yzoom); |
|
|
|
// Update the x-axis |
|
xscale.domain(d3.extent(data, function(d) { |
|
return d[0]; |
|
})) |
|
.range([0, width - margin.left - margin.right]); |
|
|
|
xaxis.scale(xscale) |
|
.orient('bottom') |
|
.tickPadding(10); |
|
|
|
svg.select('g.x.axis').call(xaxis); |
|
|
|
// Update the y-scale. |
|
yscale.domain(d3.extent(data, function(d) { |
|
return d[1]; |
|
})) |
|
.range([height - margin.top - margin.bottom, 0]); |
|
|
|
yaxis.scale(yscale) |
|
.orient('left') |
|
.tickPadding(10); |
|
|
|
svg.select('g.y.axis').call(yaxis); |
|
|
|
draw(); |
|
}); |
|
|
|
return chart; |
|
} |
|
|
|
function update() { |
|
var gs = svg.select("g.scatter"); |
|
|
|
var circle = gs.selectAll("circle") |
|
.data(function(d) { |
|
return d; |
|
}); |
|
|
|
circle.enter().append("svg:circle") |
|
.attr("class", "points") |
|
.style("fill", "steelblue") |
|
.attr("cx", function(d) { |
|
return X(d); |
|
}) |
|
.attr("cy", function(d) { |
|
return Y(d); |
|
}) |
|
.attr("r", 4); |
|
|
|
circle.attr("cx", function(d) { |
|
return X(d); |
|
}) |
|
.attr("cy", function(d) { |
|
return Y(d); |
|
}); |
|
|
|
circle.exit().remove(); |
|
} |
|
|
|
function updateZooms() { |
|
xyzoom = d3.behavior.zoom() |
|
.x(xscale) |
|
.y(yscale) |
|
.on("zoom", draw); |
|
xzoom = d3.behavior.zoom() |
|
.x(xscale) |
|
.on("zoom", draw); |
|
yzoom = d3.behavior.zoom() |
|
.y(yscale) |
|
.on("zoom", draw); |
|
} |
|
|
|
function draw() { |
|
svg.select('g.x.axis').call(xaxis); |
|
svg.select('g.y.axis').call(yaxis); |
|
update(); |
|
// After every draw, we reinitialize zoom. After every zoom, we reexecute draw, which will reinitialize zoom. |
|
// This is how we can apply multiple independent zoom behaviors to the scales. |
|
// (Note that the zoom behaviors will always end up with zoom at around 1.0, and translate at around [0,0]) |
|
updateZooms(); |
|
svg.select('rect.zoom.xy.box').call(xyzoom); |
|
svg.select('rect.zoom.x.box').call(xzoom); |
|
svg.select('rect.zoom.y.box').call(yzoom); |
|
}; |
|
|
|
// X value to scale |
|
function X(d) { |
|
return xscale(d[0]); |
|
} |
|
|
|
// Y value to scale |
|
function Y(d) { |
|
return yscale(d[1]); |
|
} |
|
return chart; |
|
} |
|
</script> |
