<html>
<head>
<title>Timeline | A lot of grouped data</title>
<script src="../../../docs/js/jquery.min.js"></script>
<script src="../../../dist/vis.js"></script>
<link href="../../../dist/vis-timeline-graph2d.min.css" rel="stylesheet" type="text/css" />
<style type="text/css">
body {
color: #4D4D4D;
font: 10pt arial;
}
</style>
</head>
<body>
<h1>Timeline visible Groups</h1>
<button onclick="showVisibleGroups()">Show current visible items</button>
<div>
<h2>visible groups:</h2>
<h3 id="visibleGroupsContainer"></h3>
<h2>(Scroll with the mouse and see the items being focus automatically on the timeline)</h2>
</div>
<div id="mytimeline"></div>
<br>
<script>
function showVisibleGroups() {
var a = timeline.getVisibleGroups();
document.getElementById("visibleGroupsContainer").innerHTML = ""
document.getElementById("visibleGroupsContainer").innerHTML += a;
};
var now = Date.now()
var options = {
stack: true,
maxHeight: 640,
horizontalScroll: false,
verticalScroll: true,
zoomKey: "ctrlKey",
start: Date.now() - 1000 * 60 * 60 * 24 * 3, // minus 3 days
end: Date.now() + 1000 * 60 * 60 * 24 * 21, // plus 1 months aprox.
orientation: {
axis: "both",
item: "top"
},
};
var groups = new vis.DataSet();
var items = new vis.DataSet();
var count = 300;
for (var i = 0; i < count; i++) {
var start = now + 1000 * 60 * 60 * 24 * (i + Math.floor(Math.random() * 7))
var end = start + 1000 * 60 * 60 * 24 * (1 + Math.floor(Math.random() * 5))
groups.add({
id: i,
content: 'Task ' + i,
order: i
})
items.add({
id: i,
group: i,
start: start,
end: end,
type: 'range',
content: 'Item ' + i
});
}
// create a Timeline
var container = document.getElementById('mytimeline');
timeline = new vis.Timeline(container, null, options);
timeline.setGroups(groups);
timeline.setItems(items);
function debounce(func, wait = 100) {
let timeout;
return function (...args) {
clearTimeout(timeout);
timeout = setTimeout(() => {
func.apply(this, args);
}, wait);
};
}
let groupFocus = (e) => {
let vGroups = timeline.getVisibleGroups()
let vItems = vGroups.reduce((res, groupId) => {
let group = timeline.itemSet.groups[groupId]
if (group.items) {
res = res.concat(Object.keys(group.items))
}
return res
}, [])
timeline.focus(vItems)
}
this.timeline.on("scroll", debounce(groupFocus, 200))
// Enabling the next line leads to a continuous since calling focus might scroll vertically even if it shouldn't
// this.timeline.on("scrollSide", debounce(groupFocus, 200))
</script>
</body>
</html>