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="Interactive demonstration of circular layout features by the CircularLayout class."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Circular Layout</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>
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</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 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
myDiagram =
new go.Diagram("myDiagramDiv", // must be the ID or reference to div
{
initialAutoScale: go.Diagram.UniformToFill,
layout: $(go.CircularLayout)
// other properties are set by the layout function, defined below
});
// define the Node template
myDiagram.nodeTemplate =
$(go.Node, "Spot",
// make sure the Node.location is different from the Node.position
{ locationSpot: go.Spot.Center },
new go.Binding("text", "text"), // for sorting
$(go.Shape, "Ellipse", // the default value for the Shape.figure property
{
fill: "lightgray",
stroke: null,
desiredSize: new go.Size(30, 30)
},
new go.Binding("figure", "figure"),
new go.Binding("fill", "fill"),
new go.Binding("desiredSize", "size")),
$(go.TextBlock,
new go.Binding("text", "text"))
);
// define the Link template
myDiagram.linkTemplate =
$(go.Link,
{ selectable: false },
$(go.Shape,
{ strokeWidth: 3, stroke: "#333" }));
// generate a circle using the default values
rebuildGraph();
}
function rebuildGraph() {
var numNodes = document.getElementById("numNodes").value;
numNodes = parseInt(numNodes, 10);
if (isNaN(numNodes)) numNodes = 16;
var width = document.getElementById("width").value;
width = parseFloat(width, 10);
var height = document.getElementById("height").value;
height = parseFloat(height, 10);
var randSizes = document.getElementById("randSizes").checked;
var circ = document.getElementById("circ").checked;
var cyclic = document.getElementById("cyclic").checked;
var minLinks = document.getElementById("minLinks").value;
minLinks = parseInt(minLinks, 10);
var maxLinks = document.getElementById("maxLinks").value;
maxLinks = parseInt(maxLinks, 10);
generateCircle(numNodes, width, height, minLinks, maxLinks, randSizes, circ, cyclic);
}
function generateCircle(numNodes, width, height, minLinks, maxLinks, randSizes, circ, cyclic) {
myDiagram.startTransaction("generateCircle");
// replace the diagram's model's nodeDataArray
generateNodes(numNodes, width, height, randSizes, circ);
// replace the diagram's model's linkDataArray
generateLinks(minLinks, maxLinks, cyclic);
// force a diagram layout
layout();
myDiagram.commitTransaction("generateCircle");
}
function generateNodes(numNodes, width, height, randSizes, circ) {
var nodeArray = [];
for (var i = 0; i < numNodes; i++) {
var size;
if (randSizes) {
size = new go.Size(Math.floor(Math.random() * (65 - width + 1)) + width, Math.floor(Math.random() * (65 - height + 1)) + height);
} else {
size = new go.Size(width, height);
}
if (circ) size.height = size.width;
var figure = "Rectangle";
if (circ) figure = "Ellipse";
nodeArray.push({
key: i,
text: i.toString(),
figure: figure,
fill: go.Brush.randomColor(),
size: size
});
}
// randomize the data, to help demonstrate sorting
for (i = 0; i < nodeArray.length; i++) {
var swap = Math.floor(Math.random() * nodeArray.length);
var temp = nodeArray[swap];
nodeArray[swap] = nodeArray[i];
nodeArray[i] = temp;
}
// set the nodeDataArray to this array of objects
myDiagram.model.nodeDataArray = nodeArray;
}
function generateLinks(min, max, cyclic) {
if (myDiagram.nodes.count < 2) return;
var linkArray = [];
var nit = myDiagram.nodes;
var nodes = new go.List(/*go.Node*/);
nodes.addAll(nit);
var num = nodes.length;
if (cyclic) {
for (var i = 0; i < num; i++) {
if (i >= num - 1) {
linkArray.push({ from: i, to: 0 });
} else {
linkArray.push({ from: i, to: i + 1 });
}
}
} else {
if (isNaN(min) || min < 0) min = 0;
if (isNaN(max) || max < min) max = min;
for (var i = 0; i < num; i++) {
var next = nodes.get(i);
var children = Math.floor(Math.random() * (max - min + 1)) + min;
for (var j = 1; j <= children; j++) {
var to = nodes.get(Math.floor(Math.random() * num));
// get keys from the Node.text strings
var nextKey = parseInt(next.text, 10);
var toKey = parseInt(to.text, 10);
if (nextKey !== toKey) {
linkArray.push({ from: nextKey, to: toKey });
}
}
}
}
myDiagram.model.linkDataArray = linkArray;
}
// Update the layout from the controls, and then perform the layout again
function layout() {
myDiagram.startTransaction("change Layout");
var lay = myDiagram.layout;
var radius = document.getElementById("radius").value;
if (radius !== "NaN") radius = parseFloat(radius, 10);
else radius = NaN;
lay.radius = radius;
var aspectRatio = document.getElementById("aspectRatio").value;
aspectRatio = parseFloat(aspectRatio, 10);
lay.aspectRatio = aspectRatio;
var startAngle = document.getElementById("startAngle").value;
startAngle = parseFloat(startAngle, 10);
lay.startAngle = startAngle;
var sweepAngle = document.getElementById("sweepAngle").value;
sweepAngle = parseFloat(sweepAngle, 10);
lay.sweepAngle = sweepAngle;
var spacing = document.getElementById("spacing").value;
spacing = parseFloat(spacing, 10);
lay.spacing = spacing;
var arrangement = document.getElementById("arrangement").value;
if (arrangement === "ConstantDistance") lay.arrangement = go.CircularLayout.ConstantDistance;
else if (arrangement === "ConstantAngle") lay.arrangement = go.CircularLayout.ConstantAngle;
else if (arrangement === "ConstantSpacing") lay.arrangement = go.CircularLayout.ConstantSpacing;
else if (arrangement === "Packed") lay.arrangement = go.CircularLayout.Packed;
var diamFormula = getRadioValue("diamFormula");
if (diamFormula === "Pythagorean") lay.nodeDiameterFormula = go.CircularLayout.Pythagorean;
else if (diamFormula === "Circular") lay.nodeDiameterFormula = go.CircularLayout.Circular;
var direction = document.getElementById("direction").value;
if (direction === "Clockwise") lay.direction = go.CircularLayout.Clockwise;
else if (direction === "Counterclockwise") lay.direction = go.CircularLayout.Counterclockwise;
else if (direction === "BidirectionalLeft") lay.direction = go.CircularLayout.BidirectionalLeft;
else if (direction === "BidirectionalRight") lay.direction = go.CircularLayout.BidirectionalRight;
var sorting = document.getElementById("sorting").value;
if (sorting === "Forwards") lay.sorting = go.CircularLayout.Forwards;
else if (sorting === "Reverse") lay.sorting = go.CircularLayout.Reverse;
else if (sorting === "Ascending") lay.sorting = go.CircularLayout.Ascending;
else if (sorting === "Descending") lay.sorting = go.CircularLayout.Descending;
else if (sorting === "Optimized") lay.sorting = go.CircularLayout.Optimized;
myDiagram.commitTransaction("change Layout");
}
function getRadioValue(name) {
var radio = document.getElementsByName(name);
for (var i = 0; i < radio.length; i++)
if (radio[i].checked) return radio[i].value;
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div style="margin-bottom: 5px; padding: 5px; background-color: aliceblue">
<span style="display: inline-block; vertical-align: top; padding: 5px">
<b>New Graph</b><br />
# of nodes: <input type="text" size="3" id="numNodes" value="16" /><br />
Node Size: <input type="text" size="3" id="width" value="25" /><input type="text" size="3" id="height" value="25" /><br />
Random Sizes: <input type="checkbox" id="randSizes" checked="checked" /> (<= 65) <br />
Circular Nodes: <input type="checkbox" id="circ" /><br />
Graph is simple ring: <input type="checkbox" id="cyclic" /><br />
Min Links from Node: <input type="text" size="2" id="minLinks" value="1" /><br />
Max Links from Node: <input type="text" size="2" id="maxLinks" value="2" /><br />
<button type="button" onclick="rebuildGraph()">Generate Circle</button>
</span>
<span style="display: inline-block; vertical-align: top; padding: 5px">
<b>CircularLayout Properties</b><br />
Radius:
<input type="text" size="3" id="radius" value="NaN" onchange="layout()" />
(along X axis; NaN or > 0)
<br />
Aspect Ratio:
<input type="text" size="2" id="aspectRatio" value="1" onchange="layout()" />
(1 is circular; > 0)
<br />
Start Angle:
<input type="text" size="3" id="startAngle" value="0" onchange="layout()" />
(angle at first element)
<br />
Sweep Angle:
<input type="text" size="3" id="sweepAngle" value="360" onchange="layout()" />
(degrees occupied; >= 1, <= 360)
<br />
Spacing:
<input type="text" size="2" id="spacing" value="6" onchange="layout()" />
(actual spacing also depends on radius)
<br />
Arrangement:
<select name="arrangement" id="arrangement" onchange="layout()">
<option value="ConstantDistance">ConstantDistance</option>
<option value="ConstantAngle">ConstantAngle</option>
<option value="ConstantSpacing" selected="selected">ConstantSpacing</option>
<option value="Packed">Packed</option>
</select>
<br />
Node Diameter:
<input type="radio" name="diamFormula" onclick="layout()" value="Pythagorean" checked="checked" /> Pythagorean
<input type="radio" name="diamFormula" onclick="layout()" value="Circular" /> Circular<br />
Direction:
<select name="direction" id="direction" onchange="layout()">
<option value="Clockwise" selected="selected">Clockwise</option>
<option value="Counterclockwise">Counterclockwise</option>
<option value="BidirectionalLeft">BidirectionalLeft</option>
<option value="BidirectionalRight">BidirectionalRight</option>
</select>
<br />
Sorting:
<select name="sorting" id="sorting" onchange="layout()">
<option value="Forwards" selected="selected">Forwards</option>
<option value="Reverse">Reverse</option>
<option value="Ascending">Ascending</option>
<option value="Descending">Descending</option>
<option value="Optimized">Optimized</option>
</select>
(use "Optimized" to reduce the number of link crossings)
</span>
</div>
<div id="myDiagramDiv" style="border: solid 1px black; background: white; width: 100%; height: 500px;"></div>
<p>
For information on <b>CircularLayout</b> and its properties, see the <a>CircularLayout</a> documentation page.
</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>