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  2. Examples

Color pie ​

styles

This example shows how to use the color attribute to display a pie-chart on a node.

js
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 an array of colors to each node.
ogma.styles.addRule({
  nodeAttributes: {
    color: node => {
      // in this case ids are numeric, so let's use it to decide how many slices to show
      const i = +node.getId();
      return COLORS.slice(0, 1 + (i % COLORS.length));
    },
    radius: 10
  }
});

// Create a random graph
ogma.generate
  .random({ nodes: 12, edges: 0 })
  .then(graph => ogma.setGraph(graph))
  .then(() => ogma.layouts.grid({ locate: true }));
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 src="index.js"></script>
  </body>
</html>
css
#graph-container {
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  position: absolute;
  margin: 0;
  overflow: hidden;
}