create-gojs-kit
Version:
A CLI for downloading GoJS samples, extensions, and docs
345 lines (311 loc) • 14 kB
HTML
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no, viewport-fit=cover"/>
<meta name="description" content="Dimensioning Links show the distance from a spot on a node to another spot on a node." />
<meta itemprop="description" content="Dimensioning Links show the distance from a spot on a node to another spot on a node." />
<meta property="og:description" content="Dimensioning Links show the distance from a spot on a node to another spot on a node." />
<meta name="twitter:description" content="Dimensioning Links show the distance from a spot on a node to another spot on a node." />
<link rel="preconnect" href="https://rsms.me/">
<link rel="stylesheet" href="../assets/css/style.css">
<!-- Copyright 1998-2025 by Northwoods Software Corporation. -->
<meta itemprop="name" content="Dimensioning Links Showing Distances Between Spots on Two Nodes" />
<meta property="og:title" content="Dimensioning Links Showing Distances Between Spots on Two Nodes" />
<meta name="twitter:title" content="Dimensioning Links Showing Distances Between Spots on Two Nodes" />
<meta property="og:image" content="https://gojs.net/latest/assets/images/screenshots/dimensioning.png" />
<meta itemprop="image" content="https://gojs.net/latest/assets/images/screenshots/dimensioning.png" />
<meta name="twitter:image" content="https://gojs.net/latest/assets/images/screenshots/dimensioning.png" />
<meta property="og:url" content="https://gojs.net/latest/samples/Dimensioning.html" />
<meta property="twitter:url" content="https://gojs.net/latest/samples/Dimensioning.html" />
<meta name="twitter:card" content="summary_large_image" />
<meta property="og:type" content="website" />
<meta property="twitter:domain" content="gojs.net" />
<title>
Dimensioning Links Showing Distances Between Spots on Two Nodes | GoJS Diagramming Library
</title>
</head>
<body>
<!-- This top nav is not part of the sample code -->
<nav id="navTop" class=" w-full h-[var(--topnav-h)] z-30 bg-white border-b border-b-gray-200">
<div class="max-w-screen-xl mx-auto flex flex-wrap items-start justify-between px-4">
<a class="text-white bg-nwoods-primary font-bold !leading-[calc(var(--topnav-h)_-_1px)] my-0 px-2 text-4xl lg:text-5xl logo"
href="../">
GoJS
</a>
<div class="relative">
<button id="topnavButton" class="h-[calc(var(--topnav-h)_-_1px)] px-2 m-0 text-gray-900 bg-inherit shadow-none md:hidden hover:!bg-inherit hover:!text-nwoods-accent hover:!shadow-none" aria-label="Navigation">
<svg class="h-7 w-7 block" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
<path d="M3.75 6.75h16.5M3.75 12h16.5m-16.5 5.25h16.5" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
</button>
<div id="topnavList" class="hidden md:block">
<div class="absolute right-0 z-30 flex flex-col items-end rounded border border-gray-200 p-4 pl-12 shadow bg-white text-gray-900 font-semibold
md:flex-row md:space-x-4 md:items-start md:border-0 md:p-0 md:shadow-none md:bg-inherit">
<a href="../learn/">Learn</a>
<a href="../samples/">Samples</a>
<a href="../intro/">Intro</a>
<a href="../api/">API</a>
<a href="../download.html">Download</a>
<a href="https://forum.nwoods.com/c/gojs/11" target="_blank" rel="noopener">Forum</a>
<a id="tc" href="https://nwoods.com/contact.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://nwoods.com/contact.html', 'contact');">Contact</a>
<a id="tb" href="https://nwoods.com/sales/index.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://nwoods.com/sales/index.html', 'buy');">Buy</a>
</div>
</div>
</div>
</div>
</nav>
<script>
window.addEventListener("DOMContentLoaded", function () {
// topnav
var topButton = document.getElementById("topnavButton");
var topnavList = document.getElementById("topnavList");
if (topButton && topnavList) {
topButton.addEventListener("click", function (e) {
topnavList
.classList
.toggle("hidden");
e.stopPropagation();
});
document.addEventListener("click", function (e) {
// if the clicked element isn't the list, close the list
if (!topnavList.classList.contains("hidden") && !e.target.closest("#topnavList")) {
topButton.click();
}
});
// set active <a> element
var url = window
.location
.href
.toLowerCase();
var aTags = topnavList.getElementsByTagName('a');
for (var i = 0; i < aTags.length; i++) {
var lowerhref = aTags[i]
.href
.toLowerCase();
if (lowerhref.endsWith('.html'))
lowerhref = lowerhref.slice(0, -5);
if (url.startsWith(lowerhref)) {
aTags[i]
.classList
.add('active');
break;
}
}
}
});
</script>
<div class="flex flex-col prose">
<div class="w-full max-w-screen-xl mx-auto">
<!-- * * * * * * * * * * * * * -->
<!-- Start of GoJS sample code -->
<script src="https://cdn.jsdelivr.net/npm/gojs@3.1.0"></script>
<div id="allSampleContent" class="p-4 w-full">
<script src="../extensions/DimensioningLink.js"></script>
<script id="code">
function init() {
myDiagram = new go.Diagram('myDiagramDiv', {
'undoManager.isEnabled': true
});
// A simple resizable node
myDiagram.nodeTemplate =
new go.Node('Auto', {
locationSpot: go.Spot.Center,
resizable: true
})
.bindTwoWay('location', 'loc', go.Point.parse, go.Point.stringify)
.add(
new go.Shape({ strokeWidth: 0, fill: 'lightgray' })
.bind('fill', 'color'),
new go.TextBlock({ margin: 10 })
.bind('text', 'key')
);
// A generalized example template using a DimensioningLink.
// Most usage might not have so many Bindings.
myDiagram.linkTemplateMap.add('Dimensioning',
new DimensioningLink()
.bind('fromSpot', 'fromSpot', go.Spot.parse)
.bind('toSpot', 'toSpot', go.Spot.parse)
.bind('direction')
.bind('extension')
.bind('inset')
.add(
new go.Shape({ stroke: 'gray' })
.bind('stroke', 'color'),
new go.Shape({ fromArrow: 'BackwardOpenTriangle', segmentIndex: 2, stroke: 'gray' })
.bind('stroke', 'color'),
new go.Shape({ toArrow: 'OpenTriangle', segmentIndex: -3, stroke: 'gray' })
.bind('stroke', 'color'),
new go.TextBlock({
segmentIndex: 2,
segmentFraction: 0.5,
segmentOrientation: go.Orientation.Upright,
alignmentFocus: go.Spot.Bottom,
stroke: 'gray',
font: '8pt sans-serif'
})
.bindObject('text', '', showDistance)
.bind('stroke', 'color')
));
// Return a string representing the distance between the two points.
// This is the cartesian distance if this.direction is NaN;
// otherwise it is the orthogonal distance along that axis.
function showDistance(link) {
const numpts = link.pointsCount;
if (numpts < 2) return '';
const p0 = link.getPoint(0);
const pn = link.getPoint(numpts - 1);
const ang = link.direction;
if (isNaN(ang)) return Math.floor(Math.sqrt(p0.distanceSquaredPoint(pn))) + '';
const rad = (ang * Math.PI) / 180;
return '' + Math.floor(Math.abs(Math.cos(rad) * (p0.x - pn.x)) +
Math.abs(Math.sin(rad) * (p0.y - pn.y)));
}
myDiagram.model = new go.GraphLinksModel(
[
{ key: 'Alpha', loc: '0 50' },
{ key: 'Beta', loc: '150 0' },
{ key: 'Gamma', loc: '100 150' }
],
[
{
from: 'Alpha',
to: 'Beta',
category: 'Dimensioning',
fromSpot: 'TopRight',
toSpot: 'TopLeft'
},
{
from: 'Alpha',
to: 'Beta',
category: 'Dimensioning',
fromSpot: 'TopLeft',
toSpot: 'TopRight',
extension: 50,
color: 'blue'
},
{
from: 'Alpha',
to: 'Beta',
category: 'Dimensioning',
fromSpot: 'TopLeft',
toSpot: 'TopLeft',
direction: 270,
color: 'green'
},
{
from: 'Alpha',
to: 'Beta',
category: 'Dimensioning',
fromSpot: 'BottomRight',
toSpot: 'BottomRight',
direction: 90,
color: 'purple'
},
{
from: 'Alpha',
to: 'Beta',
category: 'Dimensioning',
fromSpot: 'Center',
toSpot: 'Center',
extension: 50,
direction: NaN,
color: 'red'
},
{
from: 'Gamma',
to: 'Gamma',
category: 'Dimensioning',
fromSpot: 'TopLeft',
toSpot: 'TopRight',
direction: 0
},
{
from: 'Gamma',
to: 'Gamma',
category: 'Dimensioning',
fromSpot: 'TopRight',
toSpot: 'BottomRight',
direction: 90
},
{
from: 'Gamma',
to: 'Gamma',
category: 'Dimensioning',
fromSpot: 'BottomRight',
toSpot: 'BottomLeft',
direction: 180
},
{
from: 'Gamma',
to: 'Gamma',
category: 'Dimensioning',
fromSpot: 'BottomLeft',
toSpot: 'TopLeft',
direction: 270
}
]
);
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width: 100%; height: 400px"></div>
<p>
This sample makes use of the DimensioningLink extension, which inherits from the <a>Link</a> class.
The extension definition can be found at <a href="../extensions/DimensioningLink.js">DimensioningLink.js</a>.
</p>
</div>
</div>
<!-- * * * * * * * * * * * * * -->
<!-- End of GoJS sample code -->
</div>
<div id="allTagDescriptions" class="p-4 w-full max-w-screen-xl mx-auto">
<hr/>
<h3 class="text-xl">GoJS Features in this sample</h3>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>Links</h4>
<p>
The <a href="../api/symbols/Link.html" target="api">Link</a> class is used to implement a visual relationship between nodes.
Links are normally created by the presence of link data objects in the <a href="../api/symbols/GraphLinksModel.html#linkDataArray" target="api">GraphLinksModel.linkDataArray</a>
or by a parent key reference as the value of the <a href="../api/symbols/TreeModel.html#nodeParentKeyProperty" target="api">TreeModel.nodeParentKeyProperty</a> of a node data object
in a <a href="../api/symbols/TreeModel.html" target="api">TreeModel</a>.
More information can be found in the <a href="../intro/links.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#links">Related samples</a>
</p>
<hr>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>GoJS Extensions</h4>
<p>
<b>GoJS</b> can be extended in a variety of ways.
The most common way to change the standard behavior is to set properties on the <a href="../api/symbols/GraphObject.html" target="api">GraphObject</a>, <a href="../api/symbols/Diagram.html" target="api">Diagram</a>, <a href="../api/symbols/CommandHandler.html" target="api">CommandHandler</a>, <a href="../api/symbols/Tool.html" target="api">Tool</a>, or <a href="../api/symbols/Layout.html" target="api">Layout</a>.
But when the desired property does not exist, you might need to override methods of CommandHandler, Tool, Layout, Link, or Node.
Methods that you can override are documented in the API reference.
Various features of GoJS can be overriden, either by replacing a method on an instance (a feature of JavaScript) or by defining a subclass.
You should not modify the prototypes of any of the <b>GoJS</b> classes.
</p>
<p>
In addition to our samples, <b>GoJS</b> provides an <strong><a href="../samples/#extensions">extensions gallery</a></strong>,
showcasing the creation of custom tools and layouts.
Those classes and samples are written in TypeScript, available at <code>../extensionsJSM/</code>,
as ECMAScript/JavaScript modules -- these use the <code>../release/go-module.js</code> library.
We recommend that you copy the files that you need into your project, so that you can adjust how they refer to the GoJS library
that you choose and so that you can include them into your own building and packaging procedures.
</p>
<p>
More information can be found in the <a href="../intro/extensions.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#extensions">Related samples</a>
</p>
<hr>
</div>
</div>
</body>
<!-- This script is part of the gojs.net website, and is not needed to run the sample -->
<script src="../assets/js/goSamples.js"></script>
</html>