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d3 click coordinates are relative to page not svg - how to translate them (Chrome error)

When an event is in play, d3.event.x gives the position of the x coordinate of the mouse click, but relative to the entire HTML doc. I tried using jQuery's $('svg').position() to get the actual position of the svg but this return blatantly fallacious values.

Is there some easy way to find the position of an svg relative to the page that I am overlooking? I am using Chrome, by the way, in case the jQuery problem is an obscure browser error.

EDIT: I checked this in firefox and $('svg').position() returns the correct coordinates. ?!?

like image 479
ballaw Avatar asked Apr 20 '12 13:04

ballaw


1 Answers

Instead of using d3.event, which is the browser's native event, use d3.mouse to get the coordinates relative to some container. For example:

var svg = d3.select("body").append("svg")
    .attr("width", 960)
    .attr("height", 500);

var rect = svg.append("rect")
    .attr("width", "100%")
    .attr("height", "100%")
    .on("mousemove", mousemove);

function mousemove(d, i) {
  console.log(d3.mouse(this));
}
like image 142
mbostock Avatar answered Nov 16 '22 07:11

mbostock