Color

styles

This example shows how to use the color attribute. Multiple color formats are available: hexadecimal, RGB(A), and CSS color names.

index.tsindex.htmlstyles.css

import Ogma from '@linkurious/ogma';

const COLORS = [
  '#161344',
  '#3f1c4c',
  '#632654',
  '#86315b',
  '#a93c63',
  '#cd476a',
  '#f35371'
];

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 each time the node is painted.
ogma.styles.addNodeRule({
  color: n => COLORS[+n.getId() % COLORS.length]
});

// Generate a random graph
ogma.generate
  .random({ nodes: 20, edges: 0 })
  // Assign this graph to Ogma.
  .then(graph => ogma.setGraph(graph))
  .then(() => ogma.layouts.force({ locate: true, duration: 0, gravity: 0.03 }))
  .then(() => {
    // Color the node '0' in orange.
    ogma.getNode('0')!.setAttributes({ color: 'orange' });

    // Color the nodes who have a coordinate x above 90 in purple.
    ogma
      .getNodes()
      .filter(n => n.getAttribute('x') > 90)
      .setAttributes({
        color: 'purple'
      });
  });

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;
}

Color ​

Color