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Group selection
This example shows how to use nodeGrouping to group selected nodes.
ts
import Ogma, { NodeGrouping } from '@linkurious/ogma';
const ogma = new Ogma({
container: 'graph-container'
});
const duration = 300;
const graph = await ogma.generate.random({ nodes: 15, edges: 15 });
await ogma.setGraph(graph);
await ogma.view.locateGraph();
await ogma.getNodes().slice(5, 10).setSelected(true);
const transformations: NodeGrouping<any, any>[] = [];
document.getElementById('group-button')!.addEventListener('click', () => {
const selectedNodes = ogma.getSelectedNodes();
if (selectedNodes.size < 2) return;
const grouping = ogma.transformations.addNodeGrouping({
selector: node => selectedNodes.includes(node),
nodeGenerator: nodes => ({
attributes: {
radius: nodes.reduce((radius, node) => {
return radius + node.getAttribute('radius');
}, 0)
}
}),
duration
});
transformations.push(grouping);
});
document.getElementById('ungroup-button')!.addEventListener('click', () => {
if (transformations.length > 0) transformations.pop()!.destroy(duration);
});
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>
<button id="group-button" class="group">Group selected nodes</button>
<button id="ungroup-button" class="ungroup">Undo last grouping</button>
<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;
}
button {
padding: 5px;
}
.group {
position: absolute;
top: 2em;
right: 2em;
}
.ungroup {
position: absolute;
top: 5em;
right: 2em;
}