Created
March 28, 2010 08:31
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rough canvas typing
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| document.body.innerHTML = '<html><body><canvas id="canvas" height="600" width="600"></canvas></body></html>'; | |
| var canvas = document.getElementById("canvas"); | |
| var ctx = canvas.getContext("2d"); | |
| var background = "#2A3335"; | |
| ctx.fillStyle = background; | |
| ctx.fillRect (0, 0, 600, 600); | |
| ctx.textBaseline = "top"; | |
| ctx.font = "20px Arial"; | |
| var lines = [""], line = 0; | |
| function clearLine(num) { | |
| var width = ctx.measureText(lines[num]).width || lines[line].length * 20; | |
| ctx.fillStyle = background; | |
| ctx.fillRect(10,10,width + 10, 20); | |
| } | |
| document.addEventListener("keydown", function(ev) { | |
| var code; | |
| if (!ev) { | |
| ev = window.event; | |
| } | |
| if (ev.keyCode) { | |
| code = ev.keyCode; | |
| } else if (ev.which) { | |
| code = ev.which; | |
| } | |
| console.log(code); | |
| switch (code) { | |
| case 8 : | |
| clearLine(line); | |
| lines[line] = lines[line].substring(0, lines[line].length-2 || 0); | |
| break; | |
| case 32: | |
| break; | |
| default: | |
| var char = String.fromCharCode(code); | |
| var casing = (ev.shiftKey) ? char.toUpperCase : char.toLowerCase; | |
| lines[line] += casing.call(char); | |
| break; | |
| } | |
| clearLine(line); | |
| ctx.fillStyle = "#FFFFFF"; | |
| ctx.fillText(lines[line], 10, 10); | |
| }, false); |
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