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>
<head>
<meta charset="UTF-8">
<title>Radial Layout</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="TypeScript: Radial layout of an arbitrary graph given a start node; selecting a node re-lays out using it as a new root node." />
<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
</head>
<body>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; background: white; width: 100%; height: 600px"></div>
<label for="maxLayersChanger">Max Layers: </label><input type="text" id="maxLayersChanger" name="maxLayers" style="width: 50px" value="2" />
<button id="setMaxLayersButton">Set Max Layers</button>
<p>
Click on a Node to center it and show its relationships. It is also easy to add more information to each node, including
pictures, or to put such information into <a href="../intro/toolTips.html" target="_blank">Tooltips</a>.
</p>
<p>
The <code>RadialLayout</code> class is an extension defined at <a href="../extensionsTS/RadialLayout.ts">RadialLayout.ts</a>.
You can control how many layers to show, whether to draw the circles, and whether to rotate the text, by modifying
RadialLayout properties or changing overrides of <code>RadialLayout.rotateNode</code> and/or <code>RadialLayout.commitLayers</code>.
</p>
</div>
<script type="module" id="code">
import * as go from "../release/go-module.js";
import { RadialLayout } from './RadialLayout.js';
if (window.goSamples) goSamples(); // init for the samples -- you don't need to call this
const $ = go.GraphObject.make; // for conciseness in defining templates
class CustomRadialLayout extends RadialLayout {
rotateNode(node, angle, sweep, radius) {
// rotate the nodes and make sure the text is not upside-down
node.angle = angle;
const label = node.findObject('TEXTBLOCK');
if (label !== null) {
label.angle = ((angle > 90 && angle < 270 || angle < -90) ? 180 : 0);
}
}
commitLayers() {
// optional: add circles in the background
// need to remove any old ones first
const diagram = this.diagram;
if (diagram === null)
return;
const gridlayer = diagram.findLayer('Grid');
if (gridlayer === null)
return;
const root = this.root;
if (root === null)
return;
const circles = new go.Set();
gridlayer.parts.each(function(circle) {
if (circle.name === 'CIRCLE')
circles.add(circle);
});
circles.each(function(circle) {
diagram.remove(circle);
});
// add circles centered at the root
const $$ = go.GraphObject.make; // for conciseness in defining templates
for (let lay = 1; lay <= this.maxLayers; lay++) {
const radius = lay * this.layerThickness;
const circle = $$(go.Part, { name: 'CIRCLE', layerName: 'Grid' }, { locationSpot: go.Spot.Center, location: root.location }, $$(go.Shape, 'Circle', { width: radius * 2, height: radius * 2 }, { fill: 'rgba(200,200,200,0.2)', stroke: null }));
diagram.add(circle);
}
}
} // end CustomRadialLayout
const myDiagram =
$(go.Diagram, 'myDiagramDiv', // must be the ID or reference to div
{
initialAutoScale: go.Diagram.Uniform,
padding: 10,
isReadOnly: true,
layout: $(CustomRadialLayout, { maxLayers: 2 }),
'animationManager.isEnabled': false
});
// shows when hovering over a node
const commonToolTip = $('ToolTip', $(go.Panel, 'Vertical', { margin: 3 }, $(go.TextBlock, // bound to node data
{ margin: 4, font: 'bold 12pt sans-serif' }, new go.Binding('text')), $(go.TextBlock, // bound to node data
new go.Binding('text', 'color', function(c) { return 'Color: ' + c; })), $(go.TextBlock, // bound to Adornment because of call to Binding.ofObject
new go.Binding('text', '', function(ad) { return 'Connections: ' + ad.adornedPart.linksConnected.count; }).ofObject())) // end Vertical Panel
); // end Adornment
// define the Node template
myDiagram.nodeTemplate =
$(go.Node, 'Spot',
{
locationSpot: go.Spot.Center,
locationObjectName: 'SHAPE',
selectionAdorned: false,
click: nodeClicked,
toolTip: commonToolTip
}, $(go.Shape, 'Circle',
{
name: 'SHAPE',
fill: 'lightgray',
stroke: 'transparent',
strokeWidth: 2,
desiredSize: new go.Size(20, 20),
portId: '' // so links will go to the shape, not the whole node
}, new go.Binding('fill', 'color')), $(go.TextBlock,
{
name: 'TEXTBLOCK',
alignment: go.Spot.Right,
alignmentFocus: go.Spot.Left
}, new go.Binding('text')));
// this is the root node, at the center of the circular layers
myDiagram.nodeTemplateMap.add('Root',
$(go.Node, 'Auto',
{
locationSpot: go.Spot.Center,
selectionAdorned: false,
toolTip: commonToolTip
},
$(go.Shape, 'Circle', { fill: 'white' }),
$(go.TextBlock, { font: 'bold 12pt sans-serif', margin: 5 }, new go.Binding('text'))
));
// define the Link template
myDiagram.linkTemplate =
$(go.Link,
{
routing: go.Link.Normal,
curve: go.Link.Bezier,
selectionAdorned: false,
layerName: 'Background'
},
$(go.Shape,
{ stroke: 'black', strokeWidth: 1 },
new go.Binding('stroke', 'color')));
generateGraph();
function generateGraph() {
const names = [
'Joshua', 'Daniel', 'Robert', 'Noah', 'Anthony',
'Elizabeth', 'Addison', 'Alexis', 'Ella', 'Samantha',
'Joseph', 'Scott', 'James', 'Ryan', 'Benjamin',
'Walter', 'Gabriel', 'Christian', 'Nathan', 'Simon',
'Isabella', 'Emma', 'Olivia', 'Sophia', 'Ava',
'Emily', 'Madison', 'Tina', 'Elena', 'Mia',
'Jacob', 'Ethan', 'Michael', 'Alexander', 'William',
'Natalie', 'Grace', 'Lily', 'Alyssa', 'Ashley',
'Sarah', 'Taylor', 'Hannah', 'Brianna', 'Hailey',
'Christopher', 'Aiden', 'Matthew', 'David', 'Andrew',
'Kaylee', 'Juliana', 'Leah', 'Anna', 'Allison',
'John', 'Samuel', 'Tyler', 'Dylan', 'Jonathan'
];
const nodeDataArray = [];
for (let i = 0; i < names.length; i++) {
nodeDataArray.push({ key: i, text: names[i], color: go.Brush.randomColor(128, 240) });
}
const linkDataArray = [];
const num = nodeDataArray.length;
for (let i = 0; i < num * 2; i++) {
const a = Math.floor(Math.random() * num);
const b = Math.floor(Math.random() * num / 4) + 1;
linkDataArray.push({ from: a, to: (a + b) % num, color: go.Brush.randomColor(0, 127) });
}
myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);
const someone = nodeDataArray[Math.floor(Math.random() * nodeDataArray.length)];
nodeClicked(null, myDiagram.findNodeForData(someone));
}
function nodeClicked(e, root) {
if (!(root instanceof go.Node))
return;
const diagram = root.diagram;
if (diagram === null)
return;
// all other nodes should be visible and use the default category
diagram.nodes.each(function(n) {
n.visible = true;
if (n !== root)
n.category = '';
});
// make this Node the root
root.category = 'Root';
// tell the RadialLayout what the root node should be
diagram.layout.root = root;
diagram.layoutDiagram(true);
}
// called when "Set Max Layers" button is clicked
function adjustMaxLayers() {
const newMaxLayers = parseInt(document.getElementById('maxLayersChanger').value);
function isInteger(val) {
return typeof val === 'number' &&
isFinite(val) &&
Math.floor(val) === val;
}
if (!isInteger(newMaxLayers) || newMaxLayers < 1 || newMaxLayers > 10) {
alert('Please enter an integer larger than zero and less than or equal to 10.');
}
else {
const lay = myDiagram.layout;
lay.maxLayers = Math.max(1, Math.min(newMaxLayers, 10));
nodeClicked(null, lay.root);
}
}
document.getElementById("setMaxLayersButton").onclick = adjustMaxLayers;
window.myDiagram = myDiagram; // Attach to the window for console debugging
</script>
</body>
</html>