maxGraph/packages/html/stories/Orthogonal.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,
  ConnectionHandler,
  SelectionHandler,
  Guide,
  Point,
  CellState,
  EdgeHandler,
  GraphView,
  InternalEvent,
} from '@maxgraph/core';

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

export default {
  title: 'Connections/Orthogonal',
  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';

  // Enables guides
  SelectionHandler.prototype.guidesEnabled = true;

  // Alt disables guides
  Guide.prototype.isEnabledForEvent = function (evt) {
    return !InternalEvent.isAltDown(evt);
  };

  // Enables snapping waypoints to terminals
  EdgeHandler.prototype.snapToTerminals = true;

  // Enables orthogonal connect preview in IE
  ConnectionHandler.prototype.movePreviewAway = false;

  // Creates the graph inside the given container
  const graph = new Graph(container);
  graph.disconnectOnMove = false;
  graph.foldingEnabled = false;
  graph.cellsResizable = false;
  graph.extendParents = false;
  graph.setConnectable(true);

  // Implements perimeter-less connection points as fixed points (computed before the edge style).
  graph.view.updateFixedTerminalPoint = function (edge, terminal, source, constraint) {
    GraphView.prototype.updateFixedTerminalPoint.apply(this, arguments);

    const pts = edge.absolutePoints;
    const pt = pts[source ? 0 : pts.length - 1];

    if (terminal != null && pt == null && this.getPerimeterFunction(terminal) == null) {
      edge.setAbsoluteTerminalPoint(
        new Point(this.getRoutingCenterX(terminal), this.getRoutingCenterY(terminal)),
        source
      );
    }
  };

  // Changes the default edge style
  graph.getStylesheet().getDefaultEdgeStyle().edgeStyle = 'orthogonalEdgeStyle';
  delete graph.getStylesheet().getDefaultEdgeStyle().endArrow;

  const connectionHandler = graph.getPlugin('ConnectionHandler');

  // Implements the connect preview
  connectionHandler.createEdgeState = function (me) {
    const edge = graph.createEdge(null, null, null, null, null);

    return new CellState(this.graph.view, edge, this.graph.getCellStyle(edge));
  };

  // Uncomment the following if you want the container
  // to fit the size of the graph
  // graph.setResizeContainer(true);

  // 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();

  // Adds cells to the model in a single step
  graph.batchUpdate(() => {
    const v1 = graph.insertVertex(parent, null, '', 40, 40, 40, 30);
    v1.setConnectable(false);
    const v11 = graph.insertVertex(
      v1,
      null,
      '',
      0.5,
      0,
      10,
      40,
      { portConstraint: 'northsouth' },
      true
    );
    v11.geometry.offset = new Point(-5, -5);
    const v12 = graph.insertVertex(
      v1,
      null,
      '',
      0,
      0.5,
      10,
      10,
      {
        portConstraint: 'west',
        shape: 'triangle',
        direction: 'west',
        perimeter: 'none',
        routingCenterX: -0.5,
        routingCenterY: 0,
      },
      true
    );
    v12.geometry.offset = new Point(-10, -5);
    const v13 = graph.insertVertex(
      v1,
      null,
      '',
      1,
      0.5,
      10,
      10,
      {
        portConstraint: 'east',
        shape: 'triangle',
        direction: 'east',
        perimeter: 'none',
        routingCenterX: 0.5,
        routingCenterY: 0,
      },
      true
    );
    v13.geometry.offset = new Point(0, -5);

    const v2 = graph.addCell(graph.getDataModel().cloneCell(v1));
    v2.geometry.x = 200;
    v2.geometry.y = 60;

    const v3 = graph.addCell(graph.getDataModel().cloneCell(v1));
    v3.geometry.x = 40;
    v3.geometry.y = 150;

    const v4 = graph.addCell(graph.getDataModel().cloneCell(v1));
    v4.geometry.x = 200;
    v4.geometry.y = 170;

    graph.insertEdge(parent, null, '', v1.getChildAt(2), v2.getChildAt(1));
    graph.insertEdge(parent, null, '', v2.getChildAt(2), v3.getChildAt(1));
    graph.insertEdge(parent, null, '', v3.getChildAt(2), v4.getChildAt(1));
  });

  return container;
};

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