gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
199 lines (184 loc) • 8.9 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="A custom Link geometry that draws arrowheads at the end of each segment of orthogonally routed links."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Multi-Arrow 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>
<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/products/register.html">Register</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="../download.html">Download</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="https://forum.nwoods.com/c/gojs/11">Forum</a></li>
<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 id="code">
function init() {
// Since 2.2 you can also author concise templates with method chaining instead of GraphObject.make
// For details, see https://gojs.net/latest/intro/buildingObjects.html
const $ = go.GraphObject.make;
myDiagram =
new go.Diagram("myDiagramDiv", // the ID of the DIV HTML element
{
layout: $(go.ForceDirectedLayout),
"undoManager.isEnabled": true
});
myDiagram.nodeTemplate =
$(go.Node, go.Panel.Auto,
{ locationSpot: go.Spot.Center },
$(go.Shape,
{
figure: "RoundedRectangle",
parameter1: 10,
fill: "orange", // default fill color
portId: "",
fromLinkable: true,
fromSpot: go.Spot.AllSides,
toLinkable: true,
toSpot: go.Spot.AllSides,
cursor: "pointer"
},
new go.Binding("fill", "color")),
$(go.TextBlock,
{ margin: 10, font: "bold 12pt sans-serif" },
new go.Binding("text"))
);
myDiagram.linkTemplate =
$(MultiArrowLink, // subclass of Link, defined below
{
relinkableFrom: true,
relinkableTo: true,
reshapable: true,
resegmentable: true
},
$(go.Shape,
{ isPanelMain: true },
new go.Binding("fill", "color"))
// no arrowhead is defined here -- they are hard-coded in MultiArrowLink.makeGeometry
);
// create a few nodes and links
myDiagram.model = new go.GraphLinksModel([
{ key: 1, text: "one", color: "lightyellow" },
{ key: 2, text: "two", color: "brown" },
{ key: 3, text: "three", color: "green" },
{ key: 4, text: "four", color: "slateblue" },
{ key: 5, text: "five", color: "aquamarine" },
{ key: 6, text: "six", color: "lightgreen" },
{ key: 7, text: "seven" }
], [
{ from: 5, to: 6, color: "orange" },
{ from: 1, to: 2, color: "red" },
{ from: 1, to: 3, color: "blue" },
{ from: 1, to: 4, color: "goldenrod" },
{ from: 2, to: 5, color: "fuchsia" },
{ from: 3, to: 5, color: "green" },
{ from: 4, to: 5, color: "black" },
{ from: 6, to: 7 }
]);
}
// Produce a Geometry that includes an arrowhead at the end of each segment.
// This only works with orthogonal non-Bezier routing.
class MultiArrowLink extends go.Link {
constructor() {
super();
this.routing = go.Link.Orthogonal;
}
// produce a Geometry from the Link's route
makeGeometry() {
// get the Geometry created by the standard behavior
const geo = super.makeGeometry();
if (geo.type !== go.Geometry.Path || geo.figures.length === 0) return geo;
const mainfig = geo.figures.elt(0); // assume there's just one PathFigure
const mainsegs = mainfig.segments;
const arrowLen = 8; // length for each arrowhead
const arrowWid = 3; // actually half-width of each arrowhead
let fx = mainfig.startX;
let fy = mainfig.startY;
for (let i = 0; i < mainsegs.length; i++) {
const a = mainsegs.elt(i);
// assume each arrowhead is a simple triangle
const ax = a.endX;
const ay = a.endY;
let bx = ax;
let by = ay;
let cx = ax;
let cy = ay;
if (fx < ax - arrowLen) {
bx -= arrowLen; by += arrowWid;
cx -= arrowLen; cy -= arrowWid;
} else if (fx > ax + arrowLen) {
bx += arrowLen; by += arrowWid;
cx += arrowLen; cy -= arrowWid;
} else if (fy < ay - arrowLen) {
bx -= arrowWid; by -= arrowLen;
cx += arrowWid; cy -= arrowLen;
} else if (fy > ay + arrowLen) {
bx -= arrowWid; by += arrowLen;
cx += arrowWid; cy += arrowLen;
}
geo.add(new go.PathFigure(ax, ay, true)
.add(new go.PathSegment(go.PathSegment.Line, bx, by))
.add(new go.PathSegment(go.PathSegment.Line, cx, cy).close()));
fx = ax;
fy = ay;
}
return geo;
}
}
// end of MultiArrowLink class
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:700px; min-width: 200px"></div>
<p>
This sample demonstrates customization of the <a>Link</a> <a>Shape</a>'s <a>Geometry</a>.
</p>
<p>
The MultiArrowLink class in this sample inherits from Link and overrides the <a>Link.makeGeometry</a> method
to add arrowheads at the end of each interior segment, assuming that the route is orthogonal.
</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>