Click and drag (or touch) to draw a line.
forked from mbostock's block: Line Drawing
Created
February 26, 2016 23:28
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Line Drawing
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| license: gpl-3.0 |
This file contains 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"> | |
| <style> | |
| .line { | |
| fill: none; | |
| stroke: #000; | |
| stroke-width: 3px; | |
| stroke-linejoin: round; | |
| stroke-linecap: round; | |
| } | |
| </style> | |
| <svg width="960" height="500"> | |
| <rect style="fill:#fff;" width="100%" height="100%"></rect> | |
| </svg> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var activeLine; | |
| var renderPath = d3.svg.line() | |
| .x(function(d) { return d[0]; }) | |
| .y(function(d) { return d[1]; }) | |
| .interpolate("basis"); | |
| var svg = d3.select("svg") | |
| .call(d3.behavior.drag() | |
| .on("dragstart", dragstarted) | |
| .on("drag", dragged) | |
| .on("dragend", dragended)); | |
| function dragstarted() { | |
| activeLine = svg.append("path").datum([]).attr("class", "line"); | |
| } | |
| function dragged() { | |
| activeLine.datum().push(d3.mouse(this)); | |
| activeLine.attr("d", renderPath); | |
| } | |
| function dragended() { | |
| activeLine = null; | |
| } | |
| </script> |
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