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Mon 21 Jul 22:43:21 CEST 2025

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js/dos/ext/vis/examples/network/events/renderEvents.html Normal file
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<!doctype html>
<html>
<head>
<title>Network | Basic usage</title>
<script type="text/javascript" src="../../../dist/vis.js"></script>
<link href="../../../dist/vis.css" rel="stylesheet" type="text/css"/>
<style type="text/css">
#mynetwork {
width: 600px;
height: 400px;
border: 1px solid lightgray;
}
p {
max-width:600px;
}
</style>
</head>
<body>
<p>
You can draw on the canvas using normal HTML5 canvas functions. The before drawing will be behind the network, the after drawing will be in front of the network.
</p>
<div id="mynetwork"></div>
<pre id="eventSpan"></pre>
<script type="text/javascript">
// create an array with nodes
var nodes = new vis.DataSet([
{id: 1, label: 'Node 1'},
{id: 2, label: 'Node 2'},
{id: 3, label: 'Node 3'},
{id: 4, label: 'Node 4'},
{id: 5, label: 'Node 5'}
]);
// create an array with edges
var edges = new vis.DataSet([
{from: 1, to: 3},
{from: 1, to: 2},
{from: 2, to: 4},
{from: 2, to: 5}
]);
// create a network
var container = document.getElementById('mynetwork');
var data = {
nodes: nodes,
edges: edges
};
var options = {};
var network = new vis.Network(container, data, options);
network.on("initRedraw", function () {
// do something like move some custom elements?
});
network.on("beforeDrawing", function (ctx) {
var nodeId = 1;
var nodePosition = network.getPositions([nodeId]);
ctx.strokeStyle = '#A6D5F7';
ctx.fillStyle = '#294475';
ctx.circle(nodePosition[nodeId].x, nodePosition[nodeId].y,50);
ctx.fill();
ctx.stroke();
});
network.on("afterDrawing", function (ctx) {
var nodeId = 1;
var nodePosition = network.getPositions([nodeId]);
ctx.strokeStyle = '#294475';
ctx.lineWidth = 4;
ctx.fillStyle = '#A6D5F7';
ctx.circle(nodePosition[nodeId].x, nodePosition[nodeId].y,20);
ctx.fill();
ctx.stroke();
});
</script>
<script src="../../googleAnalytics.js"></script>
</body>
</html>