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="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>
</div>
<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>
<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>
</svg>
</button>
<div id="topnavList" class="hidden sm:block items-center w-auto mt-0 text-white p-0 z-20">
<ul class="list-reset list-none font-semibold flex justify-end flex-wrap sm:flex-nowrap items-center px-0 pb-0">
<li class="p-1 sm:p-0"><a class="topnav-link" href="../learn/">Learn</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="../samples/">Samples</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="../intro/">Intro</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="../api/">API</a></li>
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<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/contact.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/contact.html', 'contact');">Contact</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/sales/index.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/sales/index.html', 'buy');">Buy</a></li>
</ul>
</div>
</div>
<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 -->
<script src="../release/go.js"></script>
<div id="allSampleContent" class="p-4 w-full">
<script src="../extensions/DimensioningLink.js"></script>
<script id="code">
function init() {
var $ = go.GraphObject.make;
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) {
var numpts = link.pointsCount;
if (numpts < 2) return "";
var p0 = link.getPoint(0);
var pn = link.getPoint(numpts - 1);
var ang = link.direction;
if (isNaN(ang)) return Math.floor(Math.sqrt(p0.distanceSquaredPoint(pn))) + "";
var 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 class, which inherits from the <a>Link</a> class.
That class is defined at <a href="../extensions/DimensioningLink.js">DimensioningLink.js</a>.
</p>
</div>
</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>