gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
200 lines (181 loc) • 9.25 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 Link class using a custom tapered geometry by overriding Link.makeGeometry."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Tapered 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
});
// This controls whether links overlap each other at each side of the node,
// or if the links are spread out on each side of the node.
const SPREADLINKS = true; // must be set before defining templates!
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: (SPREADLINKS ? go.Spot.AllSides : go.Spot.None),
toLinkable: true,
toSpot: (SPREADLINKS ? go.Spot.AllSides : go.Spot.None),
cursor: "pointer"
},
new go.Binding("fill", "color")),
$(go.TextBlock,
{ margin: 10, font: "bold 12pt sans-serif" },
new go.Binding("text"))
);
myDiagram.linkTemplate =
$(TaperedLink, // subclass of Link, defined below
go.Link.Bezier,
(SPREADLINKS ? go.Link.None : go.Link.Orthogonal),
{
fromEndSegmentLength: (SPREADLINKS ? 50 : 1),
toEndSegmentLength: (SPREADLINKS ? 50 : 1),
relinkableFrom: true,
relinkableTo: true
},
$(go.Shape,
{ stroke: null, strokeWidth: 0 },
new go.Binding("fill", "color"))
);
// 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 }
]);
}
class TaperedLink extends go.Link {
// produce a Geometry from the Link's route
makeGeometry() {
// maybe use the standard geometry for this route, instead?
const numpts = this.pointsCount;
if (numpts < 4 || this.computeCurve() !== go.Link.Bezier) {
return super.makeGeometry();
}
const p0 = this.getPoint(0);
const p1 = this.getPoint((numpts > 4) ? 2 : 1);
const p2 = this.getPoint((numpts > 4) ? numpts - 3 : 2);
const p3 = this.getPoint(numpts - 1);
const fromHoriz = Math.abs(p0.y - p1.y) < Math.abs(p0.x - p1.x);
const toHoriz = Math.abs(p2.y - p3.y) < Math.abs(p2.x - p3.x);
let p0x = p0.x + (fromHoriz ? 0 : -4);
let p0y = p0.y + (fromHoriz ? -4 : 0);
let p1x = p1.x + (fromHoriz ? 0 : -3);
let p1y = p1.y + (fromHoriz ? -3 : 0);
let p2x = p2.x + (toHoriz ? 0 : -2);
let p2y = p2.y + (toHoriz ? -2 : 0);
let p3x = p3.x + (toHoriz ? 0 : -1);
let p3y = p3.y + (toHoriz ? -1 : 0);
const fig = new go.PathFigure(p0x, p0y, true); // filled
fig.add(new go.PathSegment(go.PathSegment.Bezier, p3x, p3y, p1x, p1y, p2x, p2y));
p0x = p0.x + (fromHoriz ? 0 : 4);
p0y = p0.y + (fromHoriz ? 4 : 0);
p1x = p1.x + (fromHoriz ? 0 : 3);
p1y = p1.y + (fromHoriz ? 3 : 0);
p2x = p2.x + (toHoriz ? 0 : 2);
p2y = p2.y + (toHoriz ? 2 : 0);
p3x = p3.x + (toHoriz ? 0 : 1);
p3y = p3.y + (toHoriz ? 1 : 0);
fig.add(new go.PathSegment(go.PathSegment.Line, p3x, p3y));
fig.add(new go.PathSegment(go.PathSegment.Bezier, p0x, p0y, p2x, p2y, p1x, p1y).close());
const geo = new go.Geometry();
geo.add(fig);
geo.normalize();
return geo;
}
}
// end TaperedLink 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 TaperedLink class in this sample inherits from Link and overrides the makeGeometry method.
For Bezier-curve Links, this computes a Geometry that is thick at the "from" end and thin at the "to" end.
The implementation is very simple and does not account for links that
are coming out from a node at angles that are not a multiple of 90 degrees.
</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>