Fix Font Size While Zooming

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Source

import { Graph } from '@antv/g6';

const data = {
  nodes: [
    { id: 'node0', size: 50, label: '0', style: { x: 326, y: 268 } },
    { id: 'node1', size: 30, label: '1', style: { x: 280, y: 384 } },
    { id: 'node2', size: 30, label: '2', style: { x: 234, y: 167 } },
    { id: 'node3', size: 30, label: '3', style: { x: 391, y: 368 } },
    { id: 'node4', size: 30, label: '4', style: { x: 444, y: 209 } },
    { id: 'node5', size: 30, label: '5', style: { x: 378, y: 157 } },
    { id: 'node6', size: 15, label: '6', style: { x: 229, y: 400 } },
    { id: 'node7', size: 15, label: '7', style: { x: 281, y: 440 } },
    { id: 'node8', size: 15, label: '8', style: { x: 188, y: 119 } },
    { id: 'node9', size: 15, label: '9', style: { x: 287, y: 157 } },
    { id: 'node10', size: 15, label: '10', style: { x: 185, y: 200 } },
    { id: 'node11', size: 15, label: '11', style: { x: 238, y: 110 } },
    { id: 'node12', size: 15, label: '12', style: { x: 239, y: 221 } },
    { id: 'node13', size: 15, label: '13', style: { x: 176, y: 160 } },
    { id: 'node14', size: 15, label: '14', style: { x: 389, y: 423 } },
    { id: 'node15', size: 15, label: '15', style: { x: 441, y: 341 } },
    { id: 'node16', size: 15, label: '16', style: { x: 442, y: 398 } },
  ],
  edges: [
    { source: 'node0', target: 'node1', label: '0-1' },
    { source: 'node0', target: 'node2', label: '0-2' },
    { source: 'node0', target: 'node3', label: '0-3' },
    { source: 'node0', target: 'node4', label: '0-4' },
    { source: 'node0', target: 'node5', label: '0-5' },
    { source: 'node1', target: 'node6', label: '1-6' },
    { source: 'node1', target: 'node7', label: '1-7' },
    { source: 'node2', target: 'node8', label: '2-8' },
    { source: 'node2', target: 'node9', label: '2-9' },
    { source: 'node2', target: 'node10', label: '2-10' },
    { source: 'node2', target: 'node11', label: '2-11' },
    { source: 'node2', target: 'node12', label: '2-12' },
    { source: 'node2', target: 'node13', label: '2-13' },
    { source: 'node3', target: 'node14', label: '3-14' },
    { source: 'node3', target: 'node15', label: '3-15' },
    { source: 'node3', target: 'node16', label: '3-16' },
  ],
};

const graph = new Graph({
  container: 'container',
  data,
  node: {
    style: {
      labelBackground: true,
      labelBackgroundFill: '#FFB6C1',
      labelBackgroundRadius: 4,
      labelFontFamily: 'Arial',
      labelPadding: [0, 4],
      labelText: (d) => d.id,
      size: (d) => d.size,
    },
  },
  behaviors: [
    'zoom-canvas',
    'drag-canvas',
    {
      key: 'fix-element-size',
      type: 'fix-element-size',
      enable: true,
      node: { shape: 'label' },
    },
  ],
});

graph.render();

import { Graph } from '@antv/g6';
import GUI from 'lil-gui';

export function addPanel(renderPanel: (gui: GUI) => void) {
  const gui = new GUI({ container: document.body });
  gui.title('Control');
  Object.assign(gui.domElement.style, { position: 'absolute', top: '0', right: '0', zIndex: '10' });
  renderPanel(gui);
  addEventListener('pagehide', () => gui.destroy(), { once: true });
}

export async function createGraph(
  options: ConstructorParameters<typeof Graph>[0],
  size: { width?: number; height?: number } = {},
  renderPanel?: (gui: GUI, graph: Graph) => void,
) {
  const container = document.createElement('div');
  Object.assign(container.style, {
    width: '100%',
    maxWidth: `${size.width || 600}px`,
    height: `${size.height || 400}px`,
  });
  document.getElementById('container')!.append(container);
  const graph = new Graph({ ...size, ...options, width: container.clientWidth, container, autoResize: true });
  addEventListener('pagehide', () => graph.destroy(), { once: true });
  await graph.render();
  if (renderPanel) addPanel((gui) => renderPanel(gui, graph));
  return container;
}