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="Show the visual elements of a simple diagram as a nested grouping diagram -- each Group is data bound to an element of the other Diagram."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>GoJS Visual Tree Using Nested Groups</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>
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<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">
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<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",
{
"undoManager.isEnabled": true
});
// define the "sample" Node template
myDiagram.nodeTemplate =
$(go.Node, "Auto",
$(go.Shape, "RoundedRectangle", // define the node's outer shape
{ fill: "white", stroke: "black" },
new go.Binding("fill", "color")),
$(go.TextBlock, // define the node's text
{ margin: 5 },
new go.Binding("text", "key"))
);
// use the default link template
myDiagram.model = new go.GraphLinksModel([
{ key: "Alpha", color: "lightblue" },
{ key: "Beta", color: "pink" }
], [
{ from: "Alpha", to: "Beta" }
]);
// Now we can initialize a Diagram that looks at the visual tree that constitutes the Diagram above.
myVisualTree =
new go.Diagram("myVisualTree",
{
isReadOnly: true, // do not allow users to modify or select in this view
allowSelect: false,
layout: $(go.TreeLayout, { nodeSpacing: 5 }) // automatically laid out as a tree
});
// use Groups, not regular Nodes or Links, to show relationship of GraphObjects in myDiagram
myVisualTree.groupTemplate =
$(go.Group, "Auto",
{
layout: $(go.GridLayout,
{
wrappingColumn: 2,
alignment: go.GridLayout.Position,
cellSize: new go.Size(1, 1)
})
},
$(go.Shape, { fill: "rgba(99,99,99,0.1)", strokeWidth: 0.5 }),
$(go.Panel, "Spot",
$(go.Placeholder,
{ padding: new go.Margin(15, 5, 5, 5) }),
$(go.TextBlock,
{
font: "bold 13px Helvetica, bold Arial, sans-serif",
stroke: "black",
margin: 3,
alignment: go.Spot.Top, alignmentFocus: go.Spot.Top
},
// bind the text to the Diagram/Layer/Part/GraphObject converted to a string
new go.Binding("text", "", x => x.toString()))
)
);
drawVisualTree();
}
function drawVisualTree() {
var visualNodeDataArray = [];
// recursively walk the visual tree, collecting objects as we go
function traverseVisualTree(obj, parent) {
obj.vtkey = visualNodeDataArray.length;
visualNodeDataArray.push(obj);
if (parent) {
obj.parentKey = parent.vtkey;
}
if (obj instanceof go.Diagram) {
var lit = obj.layers;
while (lit.next()) traverseVisualTree(lit.value, obj);
} else if (obj instanceof go.Layer) {
var pit = obj.parts;
while (pit.next()) traverseVisualTree(pit.value, obj);
} else if (obj instanceof go.Panel) {
var eit = obj.elements;
while (eit.next()) traverseVisualTree(eit.value, obj);
}
}
traverseVisualTree(myDiagram, null);
myVisualTree.model =
new go.GraphLinksModel(
{
nodeKeyProperty: "vtkey",
nodeGroupKeyProperty: "parentKey",
// always return true so that all node data is represented by groups
nodeIsGroupProperty: data => true,
nodeDataArray: visualNodeDataArray
});
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<b>myDiagram</b>, the diagram being inspected:<br />
<div id="myDiagramDiv" style="border: 1px solid black; width: 300px; height: 200px"></div>
<br />
<button onclick="drawVisualTree()">Draw Visual Tree</button>
<br />
<br />
<b>myVisualTree</b>, showing the Layers, Nodes and Links that are in <b>myDiagram</b> above:<br />
<div id="myVisualTree" style="border: 1px solid black; width: 100%; height: 400px"></div>
<p>
You can also try selecting, copying, and deleting parts in <b>myDiagram</b>
and then click on "Draw Visual Tree" again to see how the visual tree in <b>myDiagram</b> changes.
</p>
<p>See also the <a href="visualTree.html">Visual Tree</a> sample,
to show the same visual tree using nodes and links in a traditional tree structure.</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>