add range options to scale the scene depending on this range. Add rescale function to rescale the scene when a note is out of this range
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="description" content="">
<meta name="author" content="I.R.I">
<link rel="shortcut icon" href="/img/favicon.ico">
<title>Piano Roll</title>
<!-- Custom styles for this template -->
<link href="/css/pianoroll.css" rel="stylesheet">
</head>
<body>
<h1>Piano Roll</h1>
<noscript>You must enable JavaScript</noscript>
<div id="canvasContainer"></div>
<p>
<a href="#" onclick="clearInterval(moveInterval); clearInterval(verticalLinesInterval); return false;">stop intervals</a>
- temps écoulé : <span id="myspan"></span>
</p>
<pre id="log"></pre>
<script src="/js/libs-pianoroll.js"></script>
<script>
var eventCode = "test_1";
</script>
<script src="/js/pianoroll.js"></script>
<script>
var moveInterval = pianoroll.moveInterval;
var verticalLinesInterval = pianoroll.verticalLinesInterval;
</script>
</body>
</html>