Appearance
Color
This example shows how the color attribute can be used to change the color of edges in a graph.
ts
import Ogma from '@linkurious/ogma';
const COLORS = ['#132b43', '#326896', '#54aef3'];
const ogma = new Ogma({
container: 'graph-container'
});
// Create a rule that assigns a color to each node using a function.
// This function must be deterministic as it will be called later on, each time the node must be redrawn.
ogma.styles.addEdgeRule({
color: e => COLORS[+e.getId() % COLORS.length],
width: 5
});
// Generate a random graph
const graph = await ogma.generate.grid({ rows: 3, columns: 3 });
// Assign this graph to Ogma.
await ogma.setGraph(graph);
await ogma.layouts.force({
duration: 0,
locate: true,
charge: 1
});
// Color the edge '0' in orange.
await ogma.getEdge('0')!.setAttributes({ color: 'orange' });
// Assign the edges who have node '13' as source the color 'purple' and an arrow shape.
await ogma
.getEdges()
.filter(e => {
return e.getSource().getId() === '13';
})
.setAttributes({
color: 'purple',
shape: 'arrow'
});
html
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<link type="text/css" rel="stylesheet" href="styles.css" />
</head>
<body>
<div id="graph-container"></div>
<script type="module" src="index.ts"></script>
</body>
</html>
css
#graph-container {
top: 0;
bottom: 0;
left: 0;
right: 0;
position: absolute;
margin: 0;
overflow: hidden;
}