Zoom by Rectangle

An example of setting x- and y-scale domains (zooming) by selecting a rectangular region using the mouse. The original question required that it work in tandem with d3.behavior.zoom for panning, hence the checkbox for switching on the “zoom by rectangle” mode.

<!DOCTYPE html>
<meta charset="utf-8">
<title>Zoom by Rectangle</title>
<script src="https://d3js.org/d3.v2.min.js?2.10.1"></script>
<style>

body {
  font-family: sans-serif;
}

.noselect {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

svg {
  font: 10px sans-serif;
  shape-rendering: crispEdges;
}

rect {
  fill: #ddd;
}

rect.zoom {
  stroke: steelblue;
  fill-opacity: 0.5;
}

.axis path, .axis line {
  fill: none;
  stroke: #fff;
}

</style>
<p><label for="zoom-rect"><input type="checkbox" id="zoom-rect"> zoom by rectangle</label>
<script>

var margin = {top: 0, right: 12, bottom: 12, left: 36},
    width = 960 - margin.left - margin.right,
    height = 430 - margin.top - margin.bottom;

var x = d3.scale.linear()
    .domain([-width / 2, width / 2])
    .range([0, width]);

var y = d3.scale.linear()
    .domain([-height / 2, height / 2])
    .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 zoom = d3.behavior.zoom().x(x).y(y).on("zoom", refresh);

var zoomRect = false;

d3.select("#zoom-rect").on("change", function() {
      zoomRect = this.checked;
    });

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);

function refresh() {
  svg.select(".x.axis").call(xAxis);
  svg.select(".y.axis").call(yAxis);
}

</script>

Modified http://d3js.org/d3.v2.min.js?2.10.1 to a secure url

https://d3js.org/d3.v2.min.js?2.10.1