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gojs/extensionsJSM/SnapLinkReshaping.html

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1<!DOCTYPE html>
2<html lang="en">
3<head>
4<meta charset="utf-8"/>
5<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no, viewport-fit=cover"/>
6<meta name="description" content="TypeScript: When reshaping an orthogonal link, make sure the points are moved onto a grid."/> 
7<link rel="stylesheet" href="../assets/css/style.css"/> 
8<!-- Copyright 1998-2021 by Northwoods Software Corporation. -->
9<title>Snap Link Reshaping</title>
10</head>
11
12<body>
<!-- This top nav is not part of the sample code -->
<nav id="navTop" class="w-full z-30 top-0 text-white bg-nwoods-primary">
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        <h1 class="mb-0 p-1 ">GoJS</h1>
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  <!-- * * * * * * * * * * * * * -->
  <!-- Start of GoJS sample code -->
  
51
  <div class="p-4 w-full">
<div id="sample">
  <div style="width: 100%; display: flex; justify-content: space-between">
    <div id="myPaletteDiv" style="width: 105px; height: 620px; margin-right: 2px; background-color: whitesmoke; border: solid 1px black"></div>
    <div id="myDiagramDiv" style="flex-grow: 1; height: 620px; border: solid 1px black"></div>
  </div>
  <label><input type="checkbox" id="AvoidsNodesCheckBox" checked="checked"/>avoidsNodes</label>
  <p>
    This sample is a simplified version of the <a href="../samples/draggableLink.html">Draggable Link</a> sample.
    Links are not draggable, there are no custom <a>Adornment</a>s, nodes are not rotatable, and links
    do not have text labels.
  </p>
  <p>
    Its purpose is to demonstrate the <a href="SnapLinkReshapingTool.ts">SnapLinkReshapingTool</a>,
    an extension of <a>LinkReshapingTool</a> that snaps each dragged reshape handle of selected Links to
    the nearest grid point.  If the <a>SnapLinkReshapingTool.avoidsNodes</a> option is true,
    as it is by default, then the reshaping is limited to points where the adjacent segments would not
    be crossing over any avoidable nodes.
  </p>
  <p>
    Note how the "LinkReshaped" DiagramEvent listener changes the <a>Link.routing</a> of the reshaped Link,
    so that it is no longer AvoidsNodes routing but simple Orthogonal routing.
    This combined with <a>Link.adjusting</a> being End permits the middle points of the link route to be
    retained even after the user moves or resizes nodes.
    Furthermore there is a TwoWay <a>Binding</a> on <a>Link.routing</a>, so that the model remembers
    whether the link route had ever been reshaped manually.
  </p>
  <button id="SaveButton">Save</button>
  <button id="LoadButton">Load</button>
  <textarea id="mySavedModel" style="width:100%;height:300px">
{ "class": "go.GraphLinksModel",
  "linkFromPortIdProperty": "fromPort",
  "linkToPortIdProperty": "toPort",
  "modelData": {"position":"0 0"},
  "nodeDataArray": [
{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-3, "loc":"184 176"},
{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-2, "loc":"248 248"},
{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-4, "loc":"424 192"},
{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-5, "loc":"320 152"},
{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-6, "loc":"424 320"},
{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-7, "loc":"352 256"},
{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-8, "loc":"176 296"},
{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-9, "loc":"288 344"},
{"text":"Step", "key":-10, "loc":"96 240"},
{"text":"Step", "key":-11, "loc":"536 280"}
],
  "linkDataArray": [
{"from":-10, "to":-11, "fromPort":"R", "toPort":"L", "points":[121,240,131,240,132,240,132,240,216,240,216,176,264,176,264,104,392,104,392,240,480,240,480,280,501,280,511,280], "routing":"Orthogonal"}
  ]}
  </textarea>
</div>
103
<script type="module" id="code">
  import * as go from "../release/go-module.js";
  import './Figures.js';
  import { SnapLinkReshapingTool } from './SnapLinkReshapingTool.js';
108
  if (window.goSamples) goSamples(); // init for the samples -- you don't need to call this
  const $ = go.GraphObject.make; // for conciseness in defining templates
111
  const myDiagram =
    $(go.Diagram, 'myDiagramDiv', // must name or refer to the DIV HTML element
      {
        // supply a simple narrow grid that manually reshaped link routes will follow
        grid: $(go.Panel, 'Grid', { gridCellSize: new go.Size(8, 8) }, $(go.Shape, 'LineH', { stroke: 'lightgray', strokeWidth: 0.5 }), $(go.Shape, 'LineV', { stroke: 'lightgray', strokeWidth: 0.5 })),
        'draggingTool.isGridSnapEnabled': true,
        linkReshapingTool: $(SnapLinkReshapingTool),
        // when the user reshapes a Link, change its Link.routing from AvoidsNodes to Orthogonal,
        // so that combined with Link.adjusting == End the link will retain its reshaped mid points
        // even after nodes are moved
        'LinkReshaped': (e) => { e.subject.routing = go.Link.Orthogonal; },
        'animationManager.isEnabled': false,
        'undoManager.isEnabled': true
      });
  // when the document is modified, add a "*" to the title and enable the "Save" button
  myDiagram.addDiagramListener('Modified', (e) => {
    const button = document.getElementById('SaveButton');
    if (button)
      button.disabled = !myDiagram.isModified;
    const idx = document.title.indexOf('*');
    if (myDiagram.isModified) {
      if (idx < 0)
        document.title += '*';
    }
    else {
      if (idx >= 0)
        document.title = document.title.substr(0, idx);
    }
  });
  // Define a function for creating a "port" that is normally transparent.
  // The "name" is used as the GraphObject.portId, the "spot" is used to control how links connect
  // and where the port is positioned on the node, and the boolean "output" and "input" arguments
  // control whether the user can draw links from or to the port.
  function makePort(name, spot, output, input) {
    // the port is basically just a small transparent square
    return $(go.Shape, 'Circle', {
      fill: null,
      stroke: null,
      desiredSize: new go.Size(7, 7),
      alignment: spot,
      alignmentFocus: spot,
      portId: name,
      fromSpot: spot, toSpot: spot,
      fromLinkable: output, toLinkable: input,
      cursor: 'pointer' // show a different cursor to indicate potential link point
    });
  }
  myDiagram.nodeTemplate =
    $(go.Node, 'Spot',
      { locationSpot: go.Spot.Center },
      new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify),
      { selectable: true },
      { resizable: true, resizeObjectName: 'PANEL' },
      // the main object is a Panel that surrounds a TextBlock with a Shape
      $(go.Panel, 'Auto',
        { name: 'PANEL' },
        new go.Binding('desiredSize', 'size', go.Size.parse).makeTwoWay(go.Size.stringify),
        $(go.Shape, 'Rectangle', // default figure
          {
            portId: '',
            fromLinkable: true, toLinkable: true, cursor: 'pointer',
            fill: 'white' // default color
          },
          new go.Binding('figure'),
          new go.Binding('fill')),
        $(go.TextBlock,
          {
            font: 'bold 11pt Helvetica, Arial, sans-serif',
            margin: 8,
            maxSize: new go.Size(160, NaN),
            wrap: go.TextBlock.WrapFit,
            editable: true
          },
          new go.Binding('text').makeTwoWay())
      ),
      // four small named ports, one on each side:
      makePort('T', go.Spot.Top, false, true),
      makePort('L', go.Spot.Left, true, true),
      makePort('R', go.Spot.Right, true, true),
      makePort('B', go.Spot.Bottom, true, false),
      {
        mouseEnter: (e, node) => {
          if (node instanceof go.Node)
            showSmallPorts(node, true);
        },
        mouseLeave: (e, node) => {
          if (node instanceof go.Node)
            showSmallPorts(node, false);
        }
      });
202
  function showSmallPorts(node, show) {
    node.ports.each((port) => {
      if (port.portId !== '') { // don't change the default port, which is the big shape
        port.fill = show ? 'rgba(0,0,0,.3)' : null;
      }
    });
  }
210
  myDiagram.linkTemplate =
    $(go.Link, // the whole link panel
      { relinkableFrom: true, relinkableTo: true, reshapable: true, resegmentable: true },
      {
        routing: go.Link.AvoidsNodes,
        adjusting: go.Link.End,
        curve: go.Link.JumpOver,
        corner: 5,
        toShortLength: 4
      },
      new go.Binding('points').makeTwoWay(),
      // remember the Link.routing too
      new go.Binding('routing', 'routing', go.Binding.parseEnum(go.Link, go.Link.AvoidsNodes))
        .makeTwoWay(go.Binding.toString),
      $(go.Shape, // the link path shape
        { isPanelMain: true, strokeWidth: 2 }),
      $(go.Shape, // the arrowhead
        { toArrow: 'Standard', stroke: null }));
229
  load(); // load an initial diagram from some JSON text
231
  const link = myDiagram.links.first();
  if (link) link.isSelected = true;
234
  // initialize the Palette that is on the left side of the page
  const myPalette =
    $(go.Palette, 'myPaletteDiv', // must name or refer to the DIV HTML element
      {
        maxSelectionCount: 1,
        nodeTemplateMap: myDiagram.nodeTemplateMap,
        model: new go.GraphLinksModel([
          { text: 'Start', figure: 'Circle', fill: 'green' },
          { text: 'Step' },
          { text: 'DB', figure: 'Database', fill: 'lightgray' },
          { text: '???', figure: 'Diamond', fill: 'lightskyblue' },
          { text: 'End', figure: 'Circle', fill: 'red' },
          { text: 'Comment', figure: 'RoundedRectangle', fill: 'lightyellow' }
        ])
      });
250
  // Show the diagram's model in JSON format that the user may edit
  function save() {
    saveDiagramProperties(); // do this first, before writing to JSON
    document.getElementById('mySavedModel').value = myDiagram.model.toJson();
    myDiagram.isModified = false;
  }
257
  function load() {
    myDiagram.model = go.Model.fromJson(document.getElementById('mySavedModel').value);
    loadDiagramProperties();
  }
262
  function saveDiagramProperties() {
    myDiagram.model.modelData.position = go.Point.stringify(myDiagram.position);
  }
266
  // Called by "InitialLayoutCompleted" DiagramEvent listener, NOT directly by load()!
  function loadDiagramProperties() {
    // set Diagram.initialPosition, not Diagram.position, to handle initialization side-effects
    const pos = myDiagram.model.modelData.position;
    if (pos) myDiagram.initialPosition = go.Point.parse(pos);
  }
273
  document.getElementById("SaveButton").onclick = save;
  document.getElementById("LoadButton").onclick = load;
  document.getElementById("AvoidsNodesCheckBox").onclick = function(e) {
      myDiagram.toolManager.linkReshapingTool.avoidsNodes = e.target.checked;
    }
279
  window.myDiagram = myDiagram; // Attach to the window for console debugging
</script>
  </div>
  <!-- * * * * * * * * * * * * * -->
  <!--  End of GoJS sample code  -->
</div>
286</body>
287<!--  This script is part of the gojs.net website, and is not needed to run the sample -->
288<script src="../assets/js/goSamples.js"></script>
289</html>

1	`<!DOCTYPE html>`
2	`<html lang="en">`
3	`<head>`
4	`<meta charset="utf-8"/>`
5	`<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no, viewport-fit=cover"/>`
6	`<meta name="description" content="TypeScript: When reshaping an orthogonal link, make sure the points are moved onto a grid."/>`
7	`<link rel="stylesheet" href="../assets/css/style.css"/>`
8	`<!-- Copyright 1998-2021 by Northwoods Software Corporation. -->`
9	`<title>Snap Link Reshaping</title>`
10	`</head>`
11
12	`<body>`
13	`<!-- This top nav is not part of the sample code -->`
14	`<nav id="navTop" class="w-full z-30 top-0 text-white bg-nwoods-primary">`
15	`<div class="w-full container max-w-screen-lg mx-auto flex flex-wrap sm:flex-nowrap items-center justify-between mt-0 py-2">`
16	`<div class="md:pl-4">`
17	`<a class="text-white hover:text-white no-underline hover:no-underline`
18	`font-bold text-2xl lg:text-4xl rounded-lg hover:bg-nwoods-secondary " href="../">`
19	`<h1 class="mb-0 p-1 ">GoJS</h1>`
20	`</a>`
21	`</div>`
22	`<button id="topnavButton" class="rounded-lg sm:hidden focus:outline-none focus:ring" aria-label="Navigation">`
23	`<svg fill="currentColor" viewBox="0 0 20 20" class="w-6 h-6">`
24	`<path id="topnavOpen" fill-rule="evenodd" d="M3 5a1 1 0 011-1h12a1 1 0 110 2H4a1 1 0 01-1-1zM3 10a1 1 0 011-1h12a1 1 0 110 2H4a1 1 0 01-1-1zM9 15a1 1 0 011-1h6a1 1 0 110 2h-6a1 1 0 01-1-1z" clip-rule="evenodd"></path>`
25	`<path id="topnavClosed" class="hidden" fill-rule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clip-rule="evenodd"></path>`
26	`</svg>`
27	`</button>`
28	`<div id="topnavList" class="hidden sm:block items-center w-auto mt-0 text-white p-0 z-20">`
29	`<ul class="list-reset list-none font-semibold flex justify-end flex-wrap sm:flex-nowrap items-center px-0 pb-0">`
30	`<li class="p-1 sm:p-0"><a class="topnav-link" href="../learn/">Learn</a></li>`
31	`<li class="p-1 sm:p-0"><a class="topnav-link" href="../samples/">Samples</a></li>`
32	`<li class="p-1 sm:p-0"><a class="topnav-link" href="../intro/">Intro</a></li>`
33	`<li class="p-1 sm:p-0"><a class="topnav-link" href="../api/">API</a></li>`
34	`<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/products/register.html">Register</a></li>`
35	`<li class="p-1 sm:p-0"><a class="topnav-link" href="../download.html">Download</a></li>`
36	`<li class="p-1 sm:p-0"><a class="topnav-link" href="https://forum.nwoods.com/c/gojs/11">Forum</a></li>`
37	`<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/contact.html"`
38	`target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/contact.html', 'contact');">Contact</a></li>`
39	`<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/sales/index.html"`
40	`target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/sales/index.html', 'buy');">Buy</a></li>`
41	`</ul>`
42	`</div>`
43	`</div>`
44	`<hr class="border-b border-gray-600 opacity-50 my-0 py-0" />`
45	`</nav>`
46	`<div class="md:flex flex-col md:flex-row md:min-h-screen w-full max-w-screen-xl mx-auto">`
47	`<div id="navSide" class="flex flex-col w-full md:w-48 text-gray-700 bg-white flex-shrink-0"></div>`
48	`<!-- * * * * * * * * * * * * * -->`
49	`<!-- Start of GoJS sample code -->`
50
51
52	`<div class="p-4 w-full">`
53	`<div id="sample">`
54	`<div style="width: 100%; display: flex; justify-content: space-between">`
55	`<div id="myPaletteDiv" style="width: 105px; height: 620px; margin-right: 2px; background-color: whitesmoke; border: solid 1px black"></div>`
56	`<div id="myDiagramDiv" style="flex-grow: 1; height: 620px; border: solid 1px black"></div>`
57	`</div>`
58	`<label><input type="checkbox" id="AvoidsNodesCheckBox" checked="checked"/>avoidsNodes</label>`
59	`<p>`
60	`This sample is a simplified version of the <a href="../samples/draggableLink.html">Draggable Link</a> sample.`
61	`Links are not draggable, there are no custom <a>Adornment</a>s, nodes are not rotatable, and links`
62	`do not have text labels.`
63	`</p>`
64	`<p>`
65	`Its purpose is to demonstrate the <a href="SnapLinkReshapingTool.ts">SnapLinkReshapingTool</a>,`
66	`an extension of <a>LinkReshapingTool</a> that snaps each dragged reshape handle of selected Links to`
67	`the nearest grid point. If the <a>SnapLinkReshapingTool.avoidsNodes</a> option is true,`
68	`as it is by default, then the reshaping is limited to points where the adjacent segments would not`
69	`be crossing over any avoidable nodes.`
70	`</p>`
71	`<p>`
72	`Note how the "LinkReshaped" DiagramEvent listener changes the <a>Link.routing</a> of the reshaped Link,`
73	`so that it is no longer AvoidsNodes routing but simple Orthogonal routing.`
74	`This combined with <a>Link.adjusting</a> being End permits the middle points of the link route to be`
75	`retained even after the user moves or resizes nodes.`
76	`Furthermore there is a TwoWay <a>Binding</a> on <a>Link.routing</a>, so that the model remembers`
77	`whether the link route had ever been reshaped manually.`
78	`</p>`
79	`<button id="SaveButton">Save</button>`
80	`<button id="LoadButton">Load</button>`
81	`<textarea id="mySavedModel" style="width:100%;height:300px">`
82	`{ "class": "go.GraphLinksModel",`
83	`"linkFromPortIdProperty": "fromPort",`
84	`"linkToPortIdProperty": "toPort",`
85	`"modelData": {"position":"0 0"},`
86	`"nodeDataArray": [`
87	`{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-3, "loc":"184 176"},`
88	`{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-2, "loc":"248 248"},`
89	`{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-4, "loc":"424 192"},`
90	`{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-5, "loc":"320 152"},`
91	`{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-6, "loc":"424 320"},`
92	`{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-7, "loc":"352 256"},`
93	`{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-8, "loc":"176 296"},`
94	`{"text":"DB", "figure":"Database", "fill":"lightgray", "key":-9, "loc":"288 344"},`
95	`{"text":"Step", "key":-10, "loc":"96 240"},`
96	`{"text":"Step", "key":-11, "loc":"536 280"}`
97	`],`
98	`"linkDataArray": [`
99	`{"from":-10, "to":-11, "fromPort":"R", "toPort":"L", "points":[121,240,131,240,132,240,132,240,216,240,216,176,264,176,264,104,392,104,392,240,480,240,480,280,501,280,511,280], "routing":"Orthogonal"}`
100	`]}`
101	`</textarea>`
102	`</div>`
103
104	`<script type="module" id="code">`
105	`import * as go from "../release/go-module.js";`
106	`import './Figures.js';`
107	`import { SnapLinkReshapingTool } from './SnapLinkReshapingTool.js';`
108
109	`if (window.goSamples) goSamples(); // init for the samples -- you don't need to call this`
110	`const $ = go.GraphObject.make; // for conciseness in defining templates`
111
112	`const myDiagram =`
113	`$(go.Diagram, 'myDiagramDiv', // must name or refer to the DIV HTML element`
114	`{`
115	`// supply a simple narrow grid that manually reshaped link routes will follow`
116	`grid: $(go.Panel, 'Grid', { gridCellSize: new go.Size(8, 8) }, $(go.Shape, 'LineH', { stroke: 'lightgray', strokeWidth: 0.5 }), $(go.Shape, 'LineV', { stroke: 'lightgray', strokeWidth: 0.5 })),`
117	`'draggingTool.isGridSnapEnabled': true,`
118	`linkReshapingTool: $(SnapLinkReshapingTool),`
119	`// when the user reshapes a Link, change its Link.routing from AvoidsNodes to Orthogonal,`
120	`// so that combined with Link.adjusting == End the link will retain its reshaped mid points`
121	`// even after nodes are moved`
122	`'LinkReshaped': (e) => { e.subject.routing = go.Link.Orthogonal; },`
123	`'animationManager.isEnabled': false,`
124	`'undoManager.isEnabled': true`
125	`});`
126	`// when the document is modified, add a "*" to the title and enable the "Save" button`
127	`myDiagram.addDiagramListener('Modified', (e) => {`
128	`const button = document.getElementById('SaveButton');`
129	`if (button)`
130	`button.disabled = !myDiagram.isModified;`
131	`const idx = document.title.indexOf('*');`
132	`if (myDiagram.isModified) {`
133	`if (idx < 0)`
134	`document.title += '*';`
135	`}`
136	`else {`
137	`if (idx >= 0)`
138	`document.title = document.title.substr(0, idx);`
139	`}`
140	`});`
141	`// Define a function for creating a "port" that is normally transparent.`
142	`// The "name" is used as the GraphObject.portId, the "spot" is used to control how links connect`
143	`// and where the port is positioned on the node, and the boolean "output" and "input" arguments`
144	`// control whether the user can draw links from or to the port.`
145	`function makePort(name, spot, output, input) {`
146	`// the port is basically just a small transparent square`
147	`return $(go.Shape, 'Circle', {`
148	`fill: null,`
149	`stroke: null,`
150	`desiredSize: new go.Size(7, 7),`
151	`alignment: spot,`
152	`alignmentFocus: spot,`
153	`portId: name,`
154	`fromSpot: spot, toSpot: spot,`
155	`fromLinkable: output, toLinkable: input,`
156	`cursor: 'pointer' // show a different cursor to indicate potential link point`
157	`});`
158	`}`
159	`myDiagram.nodeTemplate =`
160	`$(go.Node, 'Spot',`
161	`{ locationSpot: go.Spot.Center },`
162	`new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify),`
163	`{ selectable: true },`
164	`{ resizable: true, resizeObjectName: 'PANEL' },`
165	`// the main object is a Panel that surrounds a TextBlock with a Shape`
166	`$(go.Panel, 'Auto',`
167	`{ name: 'PANEL' },`
168	`new go.Binding('desiredSize', 'size', go.Size.parse).makeTwoWay(go.Size.stringify),`
169	`$(go.Shape, 'Rectangle', // default figure`
170	`{`
171	`portId: '',`
172	`fromLinkable: true, toLinkable: true, cursor: 'pointer',`
173	`fill: 'white' // default color`
174	`},`
175	`new go.Binding('figure'),`
176	`new go.Binding('fill')),`
177	`$(go.TextBlock,`
178	`{`
179	`font: 'bold 11pt Helvetica, Arial, sans-serif',`
180	`margin: 8,`
181	`maxSize: new go.Size(160, NaN),`
182	`wrap: go.TextBlock.WrapFit,`
183	`editable: true`
184	`},`
185	`new go.Binding('text').makeTwoWay())`
186	`),`
187	`// four small named ports, one on each side:`
188	`makePort('T', go.Spot.Top, false, true),`
189	`makePort('L', go.Spot.Left, true, true),`
190	`makePort('R', go.Spot.Right, true, true),`
191	`makePort('B', go.Spot.Bottom, true, false),`
192	`{`
193	`mouseEnter: (e, node) => {`
194	`if (node instanceof go.Node)`
195	`showSmallPorts(node, true);`
196	`},`
197	`mouseLeave: (e, node) => {`
198	`if (node instanceof go.Node)`
199	`showSmallPorts(node, false);`
200	`}`
201	`});`
202
203	`function showSmallPorts(node, show) {`
204	`node.ports.each((port) => {`
205	`if (port.portId !== '') { // don't change the default port, which is the big shape`
206	`port.fill = show ? 'rgba(0,0,0,.3)' : null;`
207	`}`
208	`});`
209	`}`
210
211	`myDiagram.linkTemplate =`
212	`$(go.Link, // the whole link panel`
213	`{ relinkableFrom: true, relinkableTo: true, reshapable: true, resegmentable: true },`
214	`{`
215	`routing: go.Link.AvoidsNodes,`
216	`adjusting: go.Link.End,`
217	`curve: go.Link.JumpOver,`
218	`corner: 5,`
219	`toShortLength: 4`
220	`},`
221	`new go.Binding('points').makeTwoWay(),`
222	`// remember the Link.routing too`
223	`new go.Binding('routing', 'routing', go.Binding.parseEnum(go.Link, go.Link.AvoidsNodes))`
224	`.makeTwoWay(go.Binding.toString),`
225	`$(go.Shape, // the link path shape`
226	`{ isPanelMain: true, strokeWidth: 2 }),`
227	`$(go.Shape, // the arrowhead`
228	`{ toArrow: 'Standard', stroke: null }));`
229
230	`load(); // load an initial diagram from some JSON text`
231
232	`const link = myDiagram.links.first();`
233	`if (link) link.isSelected = true;`
234
235	`// initialize the Palette that is on the left side of the page`
236	`const myPalette =`
237	`$(go.Palette, 'myPaletteDiv', // must name or refer to the DIV HTML element`
238	`{`
239	`maxSelectionCount: 1,`
240	`nodeTemplateMap: myDiagram.nodeTemplateMap,`
241	`model: new go.GraphLinksModel([`
242	`{ text: 'Start', figure: 'Circle', fill: 'green' },`
243	`{ text: 'Step' },`
244	`{ text: 'DB', figure: 'Database', fill: 'lightgray' },`
245	`{ text: '???', figure: 'Diamond', fill: 'lightskyblue' },`
246	`{ text: 'End', figure: 'Circle', fill: 'red' },`
247	`{ text: 'Comment', figure: 'RoundedRectangle', fill: 'lightyellow' }`
248	`])`
249	`});`
250
251	`// Show the diagram's model in JSON format that the user may edit`
252	`function save() {`
253	`saveDiagramProperties(); // do this first, before writing to JSON`
254	`document.getElementById('mySavedModel').value = myDiagram.model.toJson();`
255	`myDiagram.isModified = false;`
256	`}`
257
258	`function load() {`
259	`myDiagram.model = go.Model.fromJson(document.getElementById('mySavedModel').value);`
260	`loadDiagramProperties();`
261	`}`
262
263	`function saveDiagramProperties() {`
264	`myDiagram.model.modelData.position = go.Point.stringify(myDiagram.position);`
265	`}`
266
267	`// Called by "InitialLayoutCompleted" DiagramEvent listener, NOT directly by load()!`
268	`function loadDiagramProperties() {`
269	`// set Diagram.initialPosition, not Diagram.position, to handle initialization side-effects`
270	`const pos = myDiagram.model.modelData.position;`
271	`if (pos) myDiagram.initialPosition = go.Point.parse(pos);`
272	`}`
273
274	`document.getElementById("SaveButton").onclick = save;`
275	`document.getElementById("LoadButton").onclick = load;`
276	`document.getElementById("AvoidsNodesCheckBox").onclick = function(e) {`
277	`myDiagram.toolManager.linkReshapingTool.avoidsNodes = e.target.checked;`
278	`}`
279
280	`window.myDiagram = myDiagram; // Attach to the window for console debugging`
281	`</script>`
282	`</div>`
283	`<!-- * * * * * * * * * * * * * -->`
284	`<!-- End of GoJS sample code -->`
285	`</div>`
286	`</body>`
287	`<!-- This script is part of the gojs.net website, and is not needed to run the sample -->`
288	`<script src="../assets/js/goSamples.js"></script>`
289	`</html>`