gojs/extensionsTS/DragZoomingScript.ts

Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams

/*
*  Copyright (C) 1998-2020 by Northwoods Software Corporation. All Rights Reserved.
*/

/*
* This is an extension and not part of the main GoJS library.
* Note that the API for this class may change with any version, even point releases.
* If you intend to use an extension in production, you should copy the code to your own source directory.
* Extensions can be found in the GoJS kit under the extensions or extensionsTS folders.
* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
*/

import * as go from '../release/go.js';
import { DragZoomingTool } from './DragZoomingTool.js';

let myDiagram: go.Diagram;
let myLoading: go.Part;

export function init() {
  if ((window as any).goSamples) (window as any).goSamples();  // init for these samples -- you don't need to call this

  const $ = go.GraphObject.make;  // for conciseness in defining templates

  myDiagram =
    $(go.Diagram, 'myDiagramDiv',
      {
        initialDocumentSpot: go.Spot.Center,
        initialViewportSpot: go.Spot.Center,

        // Define the template for Nodes, just some text inside a colored rectangle
        nodeTemplate:
          $(go.Node, 'Spot',
            { width: 70, height: 20 },
            $(go.Shape, 'Rectangle',
              new go.Binding('fill', 'c')),
            $(go.TextBlock,
              { margin: 2 },
              new go.Binding('text', 'c'))),

        // Define the template for Links, just a simple line
        linkTemplate:
          $(go.Link,
            $(go.Shape, { stroke: 'black' })),

        layout:
          $(go.TreeLayout,
            {
              angle: 90,
              nodeSpacing: 4,
              compaction: go.TreeLayout.CompactionNone
            }),

        model:
          $(go.TreeModel,
            { // we use single character property names, to save space if rendered as JSON
              nodeKeyProperty: 'k',
              nodeParentKeyProperty: 'p'
            })
      });

  // Add an instance of the custom tool defined in DragZoomingTool.js.
  // This needs to be inserted before the standard DragSelectingTool,
  // which is normally the third Tool in the ToolManager.mouseMoveTools list.
  myDiagram.toolManager.mouseMoveTools.insertAt(2, new DragZoomingTool());

  // This is a status message
  myLoading =
    $(go.Part,
      { selectable: false, location: new go.Point(0, 0) },
      $(go.TextBlock, 'loading...',
        { stroke: 'red', font: '20pt sans-serif' }));

  // temporarily add the status indicator
  myDiagram.add(myLoading);

  // allow the myLoading indicator to be shown now,
  // but allow objects added in loadTree to also be considered part of the initial Diagram
  myDiagram.delayInitialization(loadTree);
}

function loadTree() {
  // create some tree data
  const total = 99;
  const treedata = [];
  for (let i = 0; i < total; i++) {
    // these property names are also specified when creating the TreeModel
    const d = {
      k: i,  // this node data's key
      c: go.Brush.randomColor(),  // the node's color
      p: (i > 0 ? Math.floor(Math.random() * i / 2) : undefined)  // the random parent's key
    };
    treedata.push(d);
  }

  // give the Diagram's model all the data
  myDiagram.model.nodeDataArray = treedata;

  // remove the status indicator
  myDiagram.remove(myLoading);

  // Attach to the window for console manipulation
  (window as any).myDiagram = myDiagram;
}