In response to: http://stackoverflow.com/questions/27042222/create-custom-a-d3-generator
forked from jsl6906's block: Line bar chart generator
Last active
March 11, 2018 19:44
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Line bar chart generator
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| license: mit |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <body> | |
| <script src="http://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| height = 500; | |
| d3.functor = function functor(v) { | |
| return typeof v === "function" ? v : function() { | |
| return v; | |
| }; | |
| }; | |
| function lineBarGenerator() { | |
| //set defaults | |
| var x1 = function(d) { return d.x; }, | |
| y1 = height, | |
| y2 = function(d) { return -d.y; }; | |
| //returned function to generate lineBar path | |
| function lineBar(d) { | |
| var line_x1 = d3.functor(x1).call(this, d), | |
| line_y2 = d3.functor(y2).call(this, d); | |
| return `M ${line_x1}, ${y1} v ${-line_y2}`; | |
| } | |
| //getter-setter methods | |
| lineBar.x1 = function(value) { | |
| if (!arguments.length) return x1; x1 = value; return lineBar; | |
| }; | |
| lineBar.y1 = function(value) { | |
| if (!arguments.length) return y1; y1 = value; return lineBar; | |
| }; | |
| lineBar.y2 = function(value) { | |
| if (!arguments.length) return y2; y2 = value; return lineBar; | |
| }; | |
| return lineBar; | |
| } | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", "500px") | |
| .attr("height", "500px"); | |
| var lineBar = lineBarGenerator() | |
| .x1(function(d) { return d.x1; }) | |
| .y2(function(d) { return d.y2; }); | |
| var data = [ | |
| {x1: 150, y2: 100, stroke: "green"}, | |
| {x1: 200, y2: 150, stroke: "red"}, | |
| {x1: 100, y2: 250, stroke: "blue"} | |
| ]; | |
| svg.selectAll("path.lineBar") | |
| .data(data) | |
| .enter().append("path") | |
| .attr("class", "lineBar") | |
| .attr("d", lineBar) | |
| .style("stroke", function(d) { return d.stroke; }); | |
| </script> |
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