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| function( | |
| canvas, // a canvas element | |
| data // an array of values from 0 to 1 | |
| ) { | |
| var | |
| context = canvas.getContext("2d"), // get the 2d canvas context | |
| i, // array length | |
| count = i = data.length, // set the iterator and count to the length of the array | |
| h = canvas.height = canvas.offsetHeight, // ensure we have the height adjusted for the size of the canvas | |
| w = canvas.width; // get the canvas width, COMPROMISE: w = canvas.width = canvas.offsetWidth; | |
| for (; i--; // iterate throught the array in reverse | |
| context.lineTo( | |
| w * i / (count - 1), // set line points | |
| h - (h * data[i]) | |
| )); | |
| context.stroke(); // draw the line | |
| } |
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| function(a,b,c,d,e,f){with(a)for(d=c=b.length,e=height=offsetHeight;c--;f.lineTo(width*c/~-d,e-e*b[c]))f=getContext("2d");f.stroke()} |
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| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE> | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
| 0. You just DO WHAT THE FUCK YOU WANT TO. |
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| { | |
| "name": "sparkLines", | |
| "description": "Simple spark line generator using canvas.", | |
| "keywords": [ | |
| "sparkline", | |
| "canvas" | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <style> | |
| body { | |
| font-size: 32px; | |
| } | |
| #canvas { | |
| width: 140px; | |
| height: 1em; | |
| background: #fafafa; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| spark lines | |
| <canvas id="canvas"></canvas> | |
| in 140 bytes | |
| </body> | |
| <script type="text/javascript"> | |
| var spark = function(a,b,c,d,e,f){with(a)for(d=c=b.length,e=height=offsetHeight;c--;f.lineTo(width*c/~-d,e-e*b[c]))f=getContext("2d");f.stroke()} | |
| var canvas = document.getElementById("canvas"); | |
| var data = [0, .8, 0.3, .5, .25, .75, 0.1, 1, 1, 1, 1, 1, 0.4, .9, .2, .8, .3, .7, .4, .6, .5, 0.7, 0.4, 0.2, 0.5, 0.2, 0.3, 0.4, 0.4, 0.1, 0.6, 0.2, 0.4, 0.1, 0.3, 0.5, 0.6, 0.8, 0.7, 0]; | |
| spark(canvas, data); | |
| </script> | |
| </html> |
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function(a,b,c,d,e,f){with(a)for(d=c=b.length,e=height=offsetHeight;c--;f.lineTo(width*c/~-d,e-e*b[c]))f=getContext("2d");f.stroke()}