gojs
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Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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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="TypeScript: Dimensioning Links show the distance from a spot on a node to another spot on a node."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Using Dimensioning Links</title>
</head>
<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">
<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">
<div class="md:pl-4">
<a class="text-white hover:text-white no-underline hover:no-underline
font-bold text-2xl lg:text-4xl rounded-lg hover:bg-nwoods-secondary " href="../">
<h1 class="my-0 p-1 ">GoJS</h1>
</a>
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<button id="topnavButton" class="rounded-lg sm:hidden focus:outline-none focus:ring" aria-label="Navigation">
<svg fill="currentColor" viewBox="0 0 20 20" class="w-6 h-6">
<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>
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<hr class="border-b border-gray-600 opacity-50 my-0 py-0" />
</nav>
<div class="md:flex flex-col md:flex-row md:min-h-screen w-full max-w-screen-xl mx-auto">
<div id="navSide" class="flex flex-col w-full md:w-48 text-gray-700 bg-white flex-shrink-0"></div>
<!-- * * * * * * * * * * * * * -->
<!-- Start of GoJS sample code -->
<div id="allSampleContent" class="p-4 w-full">
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:400px"></div>
<p>
This sample makes use of the DimensioningLink class, which inherits from the <a>Link</a> class. That class is defined
at <a href="../extensions/DimensioningLink.js" target="_blank">DimensioningLink.js</a>.
</p>
</div>
<script type="module" id="code">
import * as go from "../release/go-module.js";
import { DimensioningLink } from './DimensioningLink.js';
if (window.goSamples) window.goSamples(); // init for these samples -- you don't need to call this
const $ = go.GraphObject.make;
const myDiagram = new go.Diagram('myDiagramDiv', {
'undoManager.isEnabled': true
});
// A simple resizable node
myDiagram.nodeTemplate =
$(go.Node, 'Auto', { locationSpot: go.Spot.Center }, new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify), { resizable: true }, $(go.Shape, { strokeWidth: 0, fill: 'lightgray' }, new go.Binding('fill', 'color')), $(go.TextBlock, { margin: 10 }, new go.Binding('text', 'key')));
// A generalized example template using a DimensioningLink.
// Most usage might not have so many Bindings.
myDiagram.linkTemplateMap.add('Dimensioning', $(DimensioningLink, new go.Binding('fromSpot', 'fromSpot', go.Spot.parse), new go.Binding('toSpot', 'toSpot', go.Spot.parse), new go.Binding('direction'), new go.Binding('extension'), new go.Binding('inset'), $(go.Shape, { stroke: 'gray' }, new go.Binding('stroke', 'color')), $(go.Shape, { fromArrow: 'BackwardOpenTriangle', segmentIndex: 2, stroke: 'gray' }, new go.Binding('stroke', 'color')), $(go.Shape, { toArrow: 'OpenTriangle', segmentIndex: -3, stroke: 'gray' }, new go.Binding('stroke', 'color')), $(go.TextBlock, {
segmentIndex: 2,
segmentFraction: 0.5,
segmentOrientation: go.Link.OrientUpright,
alignmentFocus: go.Spot.Bottom,
stroke: 'gray',
font: '8pt sans-serif'
}, new go.Binding('text', '', showDistance).ofObject(), new go.Binding('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.myDiagram = myDiagram; // Attach to the window for console debugging
</script>
</div>
<!-- * * * * * * * * * * * * * -->
<!-- End of GoJS sample code -->
</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>