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="Layout of two trees in opposite directions, assuming a single root, using TreeLayout."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Double Tree</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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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/DoubleTreeLayout.js"></script>
<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; // for conciseness in defining templates in this function
myDiagram =
new go.Diagram("myDiagramDiv",
{
layout: $(DoubleTreeLayout,
{
//vertical: true, // default directions are horizontal
// choose whether this subtree is growing towards the right or towards the left:
directionFunction: n => n.data && n.data.dir !== "left"
// controlling the parameters of each TreeLayout:
//bottomRightOptions: { nodeSpacing: 0, layerSpacing: 20 },
//topLeftOptions: { alignment: go.TreeLayout.AlignmentStart },
})
});
// define all of the gradient brushes
var graygrad = $(go.Brush, "Linear", { 0: "#F5F5F5", 1: "#F1F1F1" });
var bluegrad = $(go.Brush, "Linear", { 0: "#CDDAF0", 1: "#91ADDD" });
var yellowgrad = $(go.Brush, "Linear", { 0: "#FEC901", 1: "#FEA200" });
var lavgrad = $(go.Brush, "Linear", { 0: "#EF9EFA", 1: "#A570AD" });
myDiagram.nodeTemplate =
$(go.Node, "Auto",
{ isShadowed: true },
// define the node's outer shape
$(go.Shape, "RoundedRectangle",
{ fill: graygrad, stroke: "#D8D8D8" }, // default fill is gray
new go.Binding("fill", "color")),
// define the node's text
$(go.TextBlock,
{ margin: 5, font: "bold 11px Helvetica, bold Arial, sans-serif" },
new go.Binding("text", "key"))
);
myDiagram.linkTemplate =
$(go.Link, // the whole link panel
{ selectable: false },
$(go.Shape)); // the link shape
// create the model for the double tree; could be eiher TreeModel or GraphLinksModel
myDiagram.model = new go.TreeModel([
{ key: "Root", color: lavgrad },
{ key: "Left1", parent: "Root", dir: "left", color: bluegrad },
{ key: "leaf1", parent: "Left1" },
{ key: "leaf2", parent: "Left1" },
{ key: "Left2", parent: "Left1", color: bluegrad },
{ key: "leaf3", parent: "Left2" },
{ key: "leaf4", parent: "Left2" },
{ key: "leaf5", parent: "Left1" },
{ key: "Right1", parent: "Root", dir: "right", color: yellowgrad },
{ key: "Right2", parent: "Right1", color: yellowgrad },
{ key: "leaf11", parent: "Right2" },
{ key: "leaf12", parent: "Right2" },
{ key: "leaf13", parent: "Right2" },
{ key: "leaf14", parent: "Right1" },
{ key: "leaf15", parent: "Right1" },
{ key: "Right3", parent: "Root", dir: "right", color: yellowgrad },
{ key: "leaf16", parent: "Right3" },
{ key: "leaf17", parent: "Right3" }
]);
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="background-color: white; border: solid 1px black; width: 100%; height: 500px"></div>
<p>
This sample displays a bow-tie diagram of two trees sharing a single root node growing in opposite directions.
The immediate child data of the ROOT node have a "dir" property
that describes the direction that subtree should grow.
</p>
<p>
The <a>Diagram.layout</a> is an instance of the <a>DoubleTreeLayout</a> extension layout,
defined in <a href="../extensions/DoubleTreeLayout.js">extensions/DoubleTreeLayout.js</a>.
The layout requires a <a>DoubleTreeLayout.directionFunction</a> predicate to decide for a child node
of the root node which way the subtree should grow.
</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>