gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
229 lines (214 loc) • 9.42 kB
HTML
<html>
<head>
<meta charset="UTF-8">
<title>Radial Layout</title>
<meta name="description" content="Radial layout of an arbitrary graph given a start node; selecting a node re-lays out using it as a new root node." />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
<script src="../release/go.js"></script>
<script src="../extensions/RadialLayout.js"></script>
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
<script id="code">
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
var $ = go.GraphObject.make; // for conciseness in defining templates
myDiagram =
$(go.Diagram, "myDiagramDiv", // must be the ID or reference to div
{
initialAutoScale: go.Diagram.Uniform,
padding: 10,
isReadOnly: true,
layout: $(RadialLayout, {
maxLayers: 2,
rotateNode: function(node, angle, sweep, radius) {
// rotate the nodes and make sure the text is not upside-down
node.angle = angle;
var label = node.findObject("TEXTBLOCK");
if (label !== null) {
label.angle = ((angle > 90 && angle < 270 || angle < -90) ? 180 : 0);
}
},
commitLayers: function() {
// optional: add circles in the background
// need to remove any old ones first
var diagram = this.diagram;
var gridlayer = diagram.findLayer("Grid");
var circles = new go.Set(/*go.Part*/);
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
var $ = go.GraphObject.make; // for conciseness in defining templates
for (var lay = 1; lay <= this.maxLayers; lay++) {
var radius = lay * this.layerThickness;
var circle =
$(go.Part,
{ name: "CIRCLE", layerName: "Grid" },
{ locationSpot: go.Spot.Center, location: this.root.location },
$(go.Shape, "Circle",
{ width: radius * 2, height: radius * 2 },
{ fill: "rgba(200,200,200,0.2)", stroke: null }));
diagram.add(circle);
}
}
}),
"animationManager.isEnabled": false
});
// shows when hovering over a node
var 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", // Node.location is the center of the Shape
selectionAdorned: false,
click: nodeClicked,
toolTip: commonToolTip
},
$(go.Shape, "Circle",
{
name: "SHAPE",
fill: "lightgray", // default value, but also data-bound
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", // default value, but is data-bound
strokeWidth: 1
},
new go.Binding("stroke", "color"))
);
generateGraph();
}
function generateGraph() {
var 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"
];
var nodeDataArray = [];
for (var i = 0; i < names.length; i++) {
nodeDataArray.push({ key: i, text: names[i], color: go.Brush.randomColor(128, 240) });
}
var linkDataArray = [];
var num = nodeDataArray.length;
for (var i = 0; i < num * 2; i++) {
var a = Math.floor(Math.random() * num);
var 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);
var someone = nodeDataArray[Math.floor(Math.random() * nodeDataArray.length)];
nodeClicked(null, myDiagram.findNodeForData(someone));
}
function nodeClicked(e, root) {
var 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() {
var 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 {
myDiagram.layout.maxLayers = Math.max(1, Math.min(newMaxLayers, 10));
nodeClicked(null, myDiagram.layout.root);
}
}
</script>
</head>
<body onload="init()">
<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 onclick="adjustMaxLayers()">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="../extensions/RadialLayout.js">RadialLayout.js</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>
</body>
</html>