maxGraph/packages/html/stories/HelloPort.stories.js

import mxgraph from '@mxgraph/core';

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

export default {
  title: 'Connections/HelloPort',
  argTypes: {
    ...globalTypes,
    rubberBand: {
      type: 'boolean',
      defaultValue: true
    }
  }
};

const Template = ({ label, ...args }) => {
  const {
    mxGraph, 
    mxRubberband, 
    mxEdgeStyle,
    mxPoint,
    mxConstants,
    mxDomHelpers,
    mxClient
  } = mxgraph;

  mxClient.setImageBasePath('/images');

  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 mxGraph(container);
  graph.setConnectable(true);
  graph.setTooltips(true);

  // Sets the default edge style
  const style = graph.getStylesheet().getDefaultEdgeStyle();
  style.edge = mxEdgeStyle.ElbowConnector;

  // Ports are not used as terminals for edges, they are
  // only used to compute the graphical connection point
  graph.isPort = function(cell) {
    const geo = this.getCellGeometry(cell);

    return geo != null ? geo.relative : false;
  };

  // Implements a tooltip that shows the actual
  // source and target of an edge
  graph.getTooltipForCell = function(cell) {
    if (cell.isEdge()) {
      return `${this.convertValueToString(
        cell.getTerminal(true)
      )} => ${this.convertValueToString(
        cell.getTerminal(false)
      )}`;
    }

    return mxGraph.prototype.getTooltipForCell.apply(this, arguments);
  };

  // Removes the folding icon and disables any folding
  graph.isCellFoldable = function(cell) {
    return false;
  };

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

  // Adds cells to the model in a single step
  graph.getModel().beginUpdate();
  try {
    const v1 = graph.insertVertex(parent, null, 'Hello', 20, 80, 80, 30);
    v1.setConnectable(false);
    const v11 = graph.insertVertex(v1, null, '', 1, 1, 10, 10);
    v11.geometry.offset = new mxPoint(-5, -5);
    v11.geometry.relative = true;
    const v12 = graph.insertVertex(v1, null, '', 1, 0, 10, 10);
    v12.geometry.offset = new mxPoint(-5, -5);
    v12.geometry.relative = true;
    const v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
    const v3 = graph.insertVertex(parent, null, 'World2', 200, 20, 80, 30);
    var e1 = graph.insertEdge(parent, null, '', v11, v2);
    var e1 = graph.insertEdge(parent, null, '', v12, v3);
  } finally {
    // Updates the display
    graph.getModel().endUpdate();
  }

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

  const button = mxDomHelpers.button('View XML', function() {
    const encoder = new mxCodec();
    const node = encoder.encode(graph.getModel());
    utils.popup(utils.getPrettyXml(node), true);
  });

  controller.appendChild(button);

  return div;
}

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