maxGraph/packages/html/stories/Visibility.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, RubberBandHandler, DomHelpers } from '@maxgraph/core';
import {
  globalTypes,
  globalValues,
  rubberBandTypes,
  rubberBandValues,
} from './shared/args.js';
// style required by RubberBand
import '@maxgraph/core/css/common.css';

export default {
  title: 'Misc/Visibility',
  argTypes: {
    ...globalTypes,
    ...rubberBandTypes,
  },
  args: {
    ...globalValues,
    ...rubberBandValues,
  },
};

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);

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

  // Gets the default parent for inserting new cells. This
  // is normally the first child of the root (ie. layer 0).
  const parent = graph.getDefaultParent();

  let showOne = true;
  let showTwo = true;
  let showThree = true;

  // Overridden to implement dynamic conditions
  const isVisible = function () {
    // TODO super cannot be used here
    // let result = super.isVisible();
    let result = true;
    if (result && this.value != null) {
      result =
        (showOne && this.value == '1') ||
        (showTwo && this.value == '2') ||
        (showThree && this.value == '3');
    }
    return result;
  };

  // Adds cells to the model in a single step
  let v1;
  graph.batchUpdate(() => {
    v1 = graph.insertVertex({
      parent,
      value: '1',
      position: [20, 20],
      size: [80, 30],
    });
    v1.isVisible = isVisible;

    const v2 = graph.insertVertex({
      parent,
      value: '2',
      position: [200, 150],
      size: [80, 30],
    });
    v2.isVisible = isVisible;

    const e1 = graph.insertEdge({
      parent,
      value: '3',
      source: v1,
      target: v2,
    });
    e1.isVisible = isVisible;
  });

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

  // Dynamic conditions (requires refresh)
  buttons.appendChild(
    DomHelpers.button('Cond 1', function () {
      showOne = !showOne;
      graph.refresh();
    })
  );
  buttons.appendChild(
    DomHelpers.button('Cond 2', function () {
      showTwo = !showTwo;
      graph.refresh();
    })
  );
  buttons.appendChild(
    DomHelpers.button('Cond 3', function () {
      showThree = !showThree;
      graph.refresh();
    })
  );

  // Explicit show/hide
  buttons.appendChild(
    DomHelpers.button('Toggle cell', function () {
      graph.toggleCells(!v1.isVisible(), [v1], true);
    })
  );

  // Explicit remove/add
  let removed = null;

  buttons.appendChild(
    DomHelpers.button('Add/remove cell', function () {
      if (removed != null) {
        graph.addCells(removed);
        removed = null;
      } else {
        removed = graph.removeCells([v1]);
      }
    })
  );

  return div;
};

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