maxGraph/packages/html/stories/HierarchicalLayout.stories.js

/*
Copyright 2021-present The maxGraph project Contributors
Copyright (c) 2006-2020, JGraph Ltd

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import {
  Graph,
  domUtils,
  FastOrganicLayout,
  HierarchicalLayout,
  Perimeter,
  InternalEvent,
  RubberBandHandler,
  constants,
} from '@maxgraph/core';

import { globalTypes } from '../.storybook/preview';

export default {
  title: 'Layouts/HierarchicalLayout',
  argTypes: {
    ...globalTypes,
    contextMenu: {
      type: 'boolean',
      defaultValue: false,
    },
    rubberBand: {
      type: 'boolean',
      defaultValue: true,
    },
  },
};

const Template = ({ label, ...args }) => {
  const div = document.createElement('div');

  const container = document.createElement('div');
  container.style.position = 'relative';
  container.style.overflow = 'hidden';
  container.style.width = `${args.width}px`;
  container.style.height = `${args.height}px`;
  container.style.background = 'url(/images/grid.gif)';
  container.style.cursor = 'default';
  div.appendChild(container);

  // Creates the graph inside the given container
  const graph = new Graph(container);

  // Adds rubberband selection
  if (args.rubberBand) new RubberBandHandler(graph);

  // Changes the default vertex style in-place
  let style = graph.getStylesheet().getDefaultVertexStyle();
  style.perimiter = Perimeter.RectanglePerimeter;
  style.gradientColor = 'white';
  style.perimeterSpacing = 6;
  style.rounded = true;
  style.shadow = true;

  style = graph.getStylesheet().getDefaultEdgeStyle();
  style.rounded = true;

  // Creates a layout algorithm to be used
  // with the graph
  const layout = new HierarchicalLayout(graph);
  const organic = new FastOrganicLayout(graph);
  organic.forceConstant = 120;

  const parent = graph.getDefaultParent();

  const buttons = document.createElement('div');
  div.appendChild(buttons);

  // Adds a button to execute the layout
  let button = document.createElement('button');
  domUtils.write(button, 'Hierarchical');
  InternalEvent.addListener(button, 'click', function (evt) {
    layout.execute(parent);
  });
  buttons.appendChild(button);

  // Adds a button to execute the layout
  button = document.createElement('button');
  domUtils.write(button, 'Organic');

  InternalEvent.addListener(button, 'click', function (evt) {
    organic.execute(parent);
  });

  buttons.appendChild(button);

  // Load cells and layouts the graph
  graph.batchUpdate(() => {
    const v1 = graph.insertVertex(parent, null, '1', 0, 0, 80, 30);
    const v2 = graph.insertVertex(parent, null, '2', 0, 0, 80, 30);
    const v3 = graph.insertVertex(parent, null, '3', 0, 0, 80, 30);
    const v4 = graph.insertVertex(parent, null, '4', 0, 0, 80, 30);
    const v5 = graph.insertVertex(parent, null, '5', 0, 0, 80, 30);
    const v6 = graph.insertVertex(parent, null, '6', 0, 0, 80, 30);
    const v7 = graph.insertVertex(parent, null, '7', 0, 0, 80, 30);
    const v8 = graph.insertVertex(parent, null, '8', 0, 0, 80, 30);
    const v9 = graph.insertVertex(parent, null, '9', 0, 0, 80, 30);

    const e1 = graph.insertEdge(parent, null, '', v1, v2);
    const e2 = graph.insertEdge(parent, null, '', v1, v3);
    const e3 = graph.insertEdge(parent, null, '', v3, v4);
    const e4 = graph.insertEdge(parent, null, '', v2, v5);
    const e5 = graph.insertEdge(parent, null, '', v1, v6);
    const e6 = graph.insertEdge(parent, null, '', v2, v3);
    const e7 = graph.insertEdge(parent, null, '', v6, v4);
    const e8 = graph.insertEdge(parent, null, '', v6, v1);
    const e9 = graph.insertEdge(parent, null, '', v6, v7);
    const e10 = graph.insertEdge(parent, null, '', v7, v8);
    const e11 = graph.insertEdge(parent, null, '', v7, v9);
    const e12 = graph.insertEdge(parent, null, '', v7, v6);
    const e13 = graph.insertEdge(parent, null, '', v7, v5);

    // Executes the layout
    layout.execute(parent);
  });

  return div;
};

export const Default = Template.bind({});