reusable legend
Created
April 25, 2018 21:52
-
-
Save smokbel/f5b75e1c7aa09a60477150be3c242945 to your computer and use it in GitHub Desktop.
legend
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: mit |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| d3.legend = function() { | |
| // Defaults | |
| var t = [0, 0], | |
| cb = null, | |
| colors = d3.scaleOrdinal() | |
| .domain(["A", "B", "C", "D"]) | |
| .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b"]); | |
| var box = 38, | |
| padding = 2, | |
| dx = box + padding; | |
| function legend(selection) { | |
| selection.each(function() { | |
| var legend = d3.select(this).selectAll(".legend") | |
| .data( colors.domain().slice().reverse() ) | |
| .enter().append("g") | |
| .attr("class", "legend") | |
| .attr("transform", function(d, i) { return "translate(" + t[0] + "," + (t[1] + i * dx) + ")"; }); | |
| legend.append("rect") | |
| .attr("x", 0 ) | |
| .attr("width", box) | |
| .attr("height", box) | |
| .style("fill", colors); | |
| legend.append("text") | |
| .attr("x", - 2 * padding ) | |
| .attr("y", box / 2) | |
| .attr("dy", ".35em") | |
| .style("text-anchor", "end") | |
| .style("font-size", "0.8em") | |
| .text(function(d) { return d; }); | |
| if (typeof cb == "function") cb(); | |
| }) | |
| } | |
| legend.translate = function(_) { | |
| if (!arguments.length) return t; | |
| t = _; | |
| return legend; | |
| }; | |
| legend.colors = function(_) { | |
| if (!arguments.length) return colors; | |
| colors = _; | |
| return legend; | |
| }; | |
| legend.cb = function(_) { | |
| if (!arguments.length) return cb; | |
| cb = _; | |
| return legend; | |
| }; | |
| return legend; | |
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>legend</title> | |
| <style> | |
| body { | |
| font-family:'Helvetica Neue', Helvetica, Arial, sans-serif; | |
| } | |
| </style> | |
| <body> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script> | |
| <script src="d3.legend.js"></script> | |
| <script> | |
| var margin = {top: 50, right: 50, bottom: 50, left: 50}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.bottom - margin.top; | |
| var colors = d3.scaleThreshold() | |
| .domain(['','>6',2,3,4,5,6,7,8,9]) | |
| .range(d3.schemePuOr[10]); | |
| var legend = d3.legend() | |
| .translate([ width / 4 , height / 4 ]) | |
| .colors(colors) | |
| .cb(function() { console.log("Done!"); }); | |
| 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(legend); | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment