create-gojs-kit
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A CLI for downloading GoJS samples, extensions, and docs
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<meta itemprop="name" content="Recentering Radial Partition Layout in Concentric Annular Wedges" />
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Recentering Radial Partition Layout in Concentric Annular Wedges | GoJS Diagramming Library
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<div class="w-full max-w-screen-xl mx-auto">
<!-- * * * * * * * * * * * * * -->
<!-- Start of GoJS sample code -->
<script src="https://cdn.jsdelivr.net/npm/gojs@3.1.0"></script>
<div id="allSampleContent" class="p-4 w-full">
<script src="../extensions/RadialLayout.js"></script>
<script id="code">
var layerThickness = 70; // how thick each ring should be
function init() {
myDiagram = new go.Diagram('myDiagramDiv', {
initialAutoScale: go.AutoScale.Uniform,
isReadOnly: true,
maxSelectionCount: 1,
layout: new RadialLayout({
maxLayers: 5,
layerThickness: layerThickness,
rotateNode: function (node, angle, sweep, radius) {
// method override must be function, not =>
// all nodes are centered at the origin
node.location = this.arrangementOrigin;
// because the Shape.geometry will be centered at the origin --
// see makeAnnularWedge, below
node.diagram.model.setDataProperty(node.data, 'angle', angle);
node.diagram.model.setDataProperty(node.data, 'sweep', sweep);
node.diagram.model.setDataProperty(node.data, 'radius', radius);
}
}),
'animationManager.isEnabled': false
});
var commonToolTip =
go.GraphObject.build('ToolTip')
.add(
new go.Panel('Vertical', { margin: 3 })
.add(
new go.TextBlock({ // bound to node data
margin: 4,
font: 'bold 12pt sans-serif'
})
.bind('text'),
new go.TextBlock() // bound to node data
.bind('text', 'color', c => 'Color: ' + c),
new go.TextBlock() // bound to Adornment because of call to Binding.ofObject
.bindObject('text', '', ad => 'Connections: ' + ad.adornedPart.linksConnected.count)
) // end Vertical Panel
); // end Adornment
// define the Node template
myDiagram.nodeTemplate =
new go.Node('Spot', {
locationSpot: go.Spot.Center,
selectionAdorned: false,
click: nodeClicked,
toolTip: commonToolTip
})
.add(
// this always occupies the full circle
new go.Shape({ fill: 'lightgray', strokeWidth: 0 })
.bind('geometry', '', makeAnnularWedge)
.bind('fill', 'color'),
new go.TextBlock({ width: layerThickness, textAlign: 'center' })
.bind('alignment', '', computeTextAlignment)
.bind('angle', 'angle', ensureUpright)
.bind('text')
);
function makeAnnularWedge(data) {
var angle = data.angle;
var sweep = data.sweep;
var radius = data.radius; // the inner radius
if (angle === undefined || sweep === undefined || radius === undefined) return null;
// the Geometry will be centered about (0,0)
var outer = radius + layerThickness; // the outer radius
var inner = radius;
var p = new go.Point(outer, 0).rotate(angle - sweep / 2);
var q = new go.Point(inner, 0).rotate(angle + sweep / 2);
var geo = new go.Geometry()
.add(new go.PathFigure(-outer, -outer)) // always make sure the Geometry includes the top left corner
.add(new go.PathFigure(outer, outer)) // and the bottom right corner of the whole circular area
.add(
new go.PathFigure(p.x, p.y) // start at outer corner, go clockwise
.add(new go.PathSegment(go.SegmentType.Arc, angle - sweep / 2, sweep, 0, 0, outer, outer))
.add(new go.PathSegment(go.SegmentType.Line, q.x, q.y)) // to opposite inner corner, then anticlockwise
.add(new go.PathSegment(go.SegmentType.Arc, angle + sweep / 2, -sweep, 0, 0, inner, inner).close())
);
return geo;
}
function computeTextAlignment(data) {
var angle = data.angle;
var radius = data.radius;
if (angle === undefined || radius === undefined) return go.Spot.Center;
var p = new go.Point(radius + layerThickness / 2, 0).rotate(angle);
return new go.Spot(0.5, 0.5, p.x, p.y);
}
function ensureUpright(angle) {
if (angle > 90 && angle < 270) return angle + 180;
return angle;
}
// this is the root node, at the center of the circular layers
myDiagram.nodeTemplateMap.add('Root',
new go.Node('Auto', {
locationSpot: go.Spot.Center,
selectionAdorned: false,
toolTip: commonToolTip,
width: layerThickness * 2,
height: layerThickness * 2
})
.add(
new go.Shape('Circle', {
fill: 'white',
strokeWidth: 0.5,
spot1: go.Spot.TopLeft,
spot2: go.Spot.BottomRight
}),
new go.TextBlock({
font: 'bold 14pt sans-serif',
textAlign: 'center'
})
.bind('text')
)
);
// define the Link template -- don't show anything!
myDiagram.linkTemplate = new go.Link();
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);
// layout based on a random person
var someone = nodeDataArray[Math.floor(Math.random() * nodeDataArray.length)];
var somenode = myDiagram.findNodeForData(someone);
nodeClicked(null, somenode);
}
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(n => {
n.visible = true;
if (n !== root) n.category = '';
});
// make this Node the root
root.category = 'Root';
// the root node always gets a full circle for itself, just in case the "Root"
// template has any bindings using these properties
diagram.model.setDataProperty(root.data, 'angle', 0);
diagram.model.setDataProperty(root.data, 'sweep', 360);
diagram.model.setDataProperty(root.data, 'radius', 0);
// tell the RadialLayout what the root node should be
// setting this property will automatically invalidate the layout and then perform it again
diagram.layout.root = root;
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; background: white; width: 100%; height: 600px"></div>
<p>Click on a Node to center it and show its relationships.</p>
<p>
The <code>RadialLayout</code> class is an extension defined at <a href="../extensions/RadialLayout.js">RadialLayout.js</a>. The override of the
<code>RadialLayout.rotateNode</code> sets the <code>angle</code>, <code>sweep</code>, and <code>radius</code> data properties. Bindings in the node template
use those properties to produce the appropriate <a>Shape.geometry</a> and the <a>GraphObject.alignment</a> and <a>GraphObject.angle</a> for each
<a>TextBlock</a>.
</p>
</div>
</div>
<!-- * * * * * * * * * * * * * -->
<!-- End of GoJS sample code -->
</div>
<div id="allTagDescriptions" class="p-4 w-full max-w-screen-xl mx-auto">
<hr/>
<h3 class="text-xl">GoJS Features in this sample</h3>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>Collections</h4>
<p>
<b>GoJS</b> provides its own collection classes: <a href="../api/symbols/List.html" target="api">List</a>, <a href="../api/symbols/Set.html" target="api">Set</a>, and <a href="../api/symbols/Map.html" target="api">Map</a>.
You can iterate over a collection by using an <a href="../api/symbols/Iterator.html" target="api">Iterator</a>.
More information can be found in the <a href="../intro/collections.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#collections">Related samples</a>
</p>
<hr>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>ToolTips</h4>
<p>
A tooltip is an <a href="../api/symbols/Adornment.html" target="api">Adornment</a> that is shown when the mouse hovers over an object that has its <a href="../api/symbols/GraphObject.html#toolTip" target="api">GraphObject.toolTip</a> set.
The tooltip part is bound to the same data as the part itself.
</p>
<p>
It is typical to implement a tooltip as a "ToolTip" Panel holding a <a href="../api/symbols/TextBlock.html" target="api">TextBlock</a> or a Panel of TextBlocks and other objects.
Each "ToolTip" is just an "Auto" Panel <a href="../api/symbols/Adornment.html" target="api">Adornment</a> that is shadowed, and where the border is a rectangular <a href="../api/symbols/Shape.html" target="api">Shape</a> with a light gray fill.
However you can implement the tooltip as any arbitrarily complicated Adornment.
</p>
<p>
More information can be found in the <a href="../intro/tooltips.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#tooltips">Related samples</a>
</p>
<hr>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>Geometry Path Strings</h4>
<p>
The <b>GoJS</b> <a href="../api/symbols/Geometry.html" target="api">Geometry</a> class controls the "shape" of a <a href="../api/symbols/Shape.html" target="api">Shape</a>,
whereas the <a href="../api/symbols/Shape.html#fill" target="api">Shape.fill</a> and <a href="../api/symbols/Shape.html#stroke" target="api">Shape.stroke</a> and other shape properties control the colors and appearance of the shape.
For common shape figures, there are predefined geometries that can be used by setting <a href="../api/symbols/Shape.html#figure" target="api">Shape.figure</a>.
However one can also define custom geometries.
</p>
<p>
One can construct any Geometry by allocating and initializing a <a href="../api/symbols/Geometry.html" target="api">Geometry</a> of at least one <a href="../api/symbols/PathFigure.html" target="api">PathFigure</a> holding some <a href="../api/symbols/PathSegment.html" target="api">PathSegment</a>s.
But you may find that using the string representation of a Geometry is easier to write and save in a database.
Use the static method <a href="../api/symbols/Geometry.html#parse" target="api">Geometry.parse</a> or the <a href="../api/symbols/Shape.html#geometryString" target="api">Shape.geometryString</a> property to transform a geometry path string into a <a href="../api/symbols/Geometry.html" target="api">Geometry</a> object.
</p>
<p>
More information can be found in the <a href="../intro/geometry.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#geometries">Related samples</a>
</p>
<hr>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>Custom Layouts</h4>
<p>
GoJS allows for the creation of custom layouts to meet specific needs.
</p>
<p>
There are also many layouts that are extensions -- not predefined in the <code>go.js</code> or <code>go-debug.js</code> library,
but available as source code in one of the three extension directories, with some documentation and corresponding samples.
More information can be found in the <a href="../intro/layouts.html#CustomLayouts">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#customlayout">Related samples</a>
</p>
<hr>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>GoJS Extensions</h4>
<p>
<b>GoJS</b> can be extended in a variety of ways.
The most common way to change the standard behavior is to set properties on the <a href="../api/symbols/GraphObject.html" target="api">GraphObject</a>, <a href="../api/symbols/Diagram.html" target="api">Diagram</a>, <a href="../api/symbols/CommandHandler.html" target="api">CommandHandler</a>, <a href="../api/symbols/Tool.html" target="api">Tool</a>, or <a href="../api/symbols/Layout.html" target="api">Layout</a>.
But when the desired property does not exist, you might need to override methods of CommandHandler, Tool, Layout, Link, or Node.
Methods that you can override are documented in the API reference.
Various features of GoJS can be overriden, either by replacing a method on an instance (a feature of JavaScript) or by defining a subclass.
You should not modify the prototypes of any of the <b>GoJS</b> classes.
</p>
<p>
In addition to our samples, <b>GoJS</b> provides an <strong><a href="../samples/#extensions">extensions gallery</a></strong>,
showcasing the creation of custom tools and layouts.
Those classes and samples are written in TypeScript, available at <code>../extensionsJSM/</code>,
as ECMAScript/JavaScript modules -- these use the <code>../release/go-module.js</code> library.
We recommend that you copy the files that you need into your project, so that you can adjust how they refer to the GoJS library
that you choose and so that you can include them into your own building and packaging procedures.
</p>
<p>
More information can be found in the <a href="../intro/extensions.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#extensions">Related samples</a>
</p>
<hr>
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