<html>
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								<head>
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								  <title>Timeline | Vertical Scroll Option</title>
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								  <script src="../../../dist/vis.js"></script>
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								  <link href="../../../dist/vis.css" rel="stylesheet" type="text/css" />
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								  <script src="../../googleAnalytics.js"></script>
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								</head>
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								<body>
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								<h1>Timeline vertical scroll option</h1>
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								<h2>With <code>
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								verticalScroll: true,
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								zoomKey: 'ctrlKey'</code>
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								</h2>
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								<div id="mytimeline1"></div>
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								<h2>With <code>
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								horizontalScroll: true,
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								verticalScroll: true,
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								zoomKey: 'ctrlKey'</code>
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								</h2>
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								<div id="mytimeline2"></div>
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								<script>
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								  // create groups
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								  var numberOfGroups = 25; 
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								  var groups = new vis.DataSet()
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								  for (var i = 0; i < numberOfGroups; i++) {
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								    groups.add({
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								      id: i,
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								      content: 'Truck ' + i
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								    })
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								  }
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								  // create items
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								  var numberOfItems = 1000;
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								  var items = new vis.DataSet();
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								  var itemsPerGroup = Math.round(numberOfItems/numberOfGroups);
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								  for (var truck = 0; truck < numberOfGroups; truck++) {
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								    var date = new Date();
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								    for (var order = 0; order < itemsPerGroup; order++) {
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								      date.setHours(date.getHours() +  4 * (Math.random() < 0.2));
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								      var start = new Date(date);
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								      date.setHours(date.getHours() + 2 + Math.floor(Math.random()*4));
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								      var end = new Date(date);
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								      var orderIndex = order + itemsPerGroup * truck
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								      items.add({
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								        id: orderIndex,
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								        group: truck,
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								        start: start,
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								        end: end,
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								        content: 'Order ' + orderIndex
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								      });
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								    }
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								  }
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								  // specify options
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								  var options = {
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								    stack: true,
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								    verticalScroll: true,
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								    zoomKey: 'ctrlKey',
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								    maxHeight: 200,
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								    start: new Date(),
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								    end: new Date(1000*60*60*24 + (new Date()).valueOf()),
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								  };
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								  // create a Timeline
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								  options1 = Object.assign({}, options)
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								  var container1 = document.getElementById('mytimeline1');
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								  timeline1 = new vis.Timeline(container1, items, groups, options1);
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								  options2 = Object.assign({horizontalScroll: true}, options)
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								  var container2 = document.getElementById('mytimeline2');
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								  timeline2 = new vis.Timeline(container2, items, groups, options2);
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								</script>
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								</body>
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								</html>
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