samples/minimalJSON.html

﻿<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Minimal GoJS Sample with JSON</title>
  <meta name="description" content="The Minimal sample, loading the model from a JSON data source." />
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <!-- Copyright 1998-2019 by Northwoods Software Corporation. -->

  <script src="../assets/js/jquery.min.js"></script>
  <script src="../release/go.js"></script>
  <script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
  <script id="code">
    function init() {
      if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
      var $$ = go.GraphObject.make;  // for conciseness in defining templates, avoid $ due to jQuery

      myDiagram = $$(go.Diagram, "myDiagramDiv",  // create a Diagram for the DIV HTML element
        {
          "undoManager.isEnabled": true  // enable undo & redo
        });

      // define a simple Node template
      myDiagram.nodeTemplate =
        $$(go.Node, "Auto",  // the Shape will go around the TextBlock
          $$(go.Shape, "RoundedRectangle", { strokeWidth: 0 },
            // Shape.fill is bound to Node.data.color
            new go.Binding("fill", "color")),
          $$(go.TextBlock,
            { margin: 8 },  // some room around the text
            // TextBlock.text is bound to Node.data.key
            new go.Binding("text", "key"))
        );

      // but use the default Link template, by not setting Diagram.linkTemplate

      // The previous initialization is the same as the minimal.html sample.
      // Here we request JSON-format text data from the server, in this case from a static file.
      jQuery.getJSON("minimal.json", load);
    }

    function load(jsondata) {
      // create the model from the data in the JavaScript object parsed from JSON text
      myDiagram.model = new go.GraphLinksModel(jsondata["nodes"], jsondata["links"]);
    }
  </script>
</head>
<body onload="init()">
<div id="sample">
  <p>Minimal <b>GoJS</b> Sample, reading JSON data</p>
  <!-- The DIV for the Diagram needs an explicit size or else we won't see anything.
       Also add a border to help see the edges. -->
  <div id="myDiagramDiv" style="border: solid 1px black; width:400px; height:400px"></div>
  <p>
  This is just like the <a href="minimal.html">Minimal</a> sample, but this reads JSON data from the server.
  </p>
  <p>
  Here are the contents of the <code>minimal.json</code> file:
  </p>
  <pre>
{
  "nodes":[
{ "key":"Alpha", "color":"lightblue" },
{ "key":"Beta", "color":"orange" },
{ "key":"Gamma", "color":"lightgreen" },
{ "key":"Delta", "color":"pink" }
  ],
  "links":[
{ "from":"Alpha", "to":"Beta" },
{ "from":"Alpha", "to":"Gamma" },
{ "from":"Beta", "to":"Beta" },
{ "from":"Gamma", "to":"Delta" },
{ "from":"Delta", "to":"Alpha" }
  ]
}
  </pre>
  <p>
  Because this is a "minimal" sample, this sample has no way to update the data on the server.
  </p>
</div>
</body>
</html>