maxGraph/packages/html/stories/OffPage.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, CellTracker, constants, InternalEvent } from '@maxgraph/core';

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

export default {
  title: 'Zoom_OffPage/OffPage',
  argTypes: {
    ...globalTypes,
  },
};

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

  // Use complete cell as highlight region
  constants.ACTIVE_REGION = 1;

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

  // Highlights offpage connectors
  const highlight = new CellTracker(graph, null, function (me) {
    const cell = me.getCell();

    if (cell != null && cell.value != null && typeof cell.value.create === 'function') {
      return cell;
    }

    return null;
  });

  // Handles clicks on offpage connectors and
  // executes function in user object
  graph.addListener(InternalEvent.CLICK, function (source, evt) {
    const cell = evt.getProperty('cell');

    if (cell != null && cell.value != null && typeof cell.value.create === 'function') {
      cell.value.create();
    }
  });

  // Handles clicks on offpage connectors and
  // executes function in user object
  graph.getCursorForCell = function (cell) {
    if (cell != null && cell.value != null && typeof cell.value.create === 'function') {
      return 'pointer';
    }
  };

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

  first = function () {
    const value = {
      toString() {
        return 'Next';
      },
      create: second,
    };

    // Adds cells to the model in a single step
    graph.batchUpdate(() => {
      graph.getDataModel().setRoot(graph.getDataModel().createRoot());
      const parent = graph.getDefaultParent();

      const v1 = graph.insertVertex(parent, null, 'Click', 30, 20, 80, 30, {
        fillColor: '#FFFF88',
        strokeColor: '#FF1A00',
      });
      const v2 = graph.insertVertex(parent, null, 'Next', 20, 150, 100, 30, {
        fillColor: '#FFFF88',
        strokeColor: '#FF1A00',
      });
      const v3 = graph.insertVertex(parent, null, value, 200, 150, 40, 40, {
        shape: 'triangle',
        align: 'left',
        fillColor: '#C3D9FF',
        strokeColor: '#4096EE',
      });
      const e1 = graph.insertEdge(parent, null, null, v1, v2, { strokeColor: '#FF1A00' });
    });
  };

  second = function () {
    const value = {
      toString() {
        return 'Prev';
      },
      create: first,
    };

    // Adds cells to the model in a single step
    graph.batchUpdate(() => {
      graph.getDataModel().setRoot(graph.getDataModel().createRoot());
      const parent = graph.getDefaultParent();

      const v1 = graph.insertVertex(parent, null, 'Click', 30, 20, 80, 30, {
        fillColor: '#CDEB8B',
        strokeColor: '#008C00',
      });
      const v2 = graph.insertVertex(parent, null, 'Prev', 220, 20, 100, 30, {
        fillColor: '#CDEB8B',
        strokeColor: '#008C00',
      });
      const v3 = graph.insertVertex(parent, null, value, 30, 150, 40, 40, {
        shape: 'triangle',
        align: 'right',
        fillColor: '#C3D9FF',
        strokeColor: '#4096EE',
        direction: 'west',
      });
      const e1 = graph.insertEdge(parent, null, null, v1, v2, { strokeColor: '#008C00' });
    });
  };

  first();

  return container;
};

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