create-gojs-kit
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A CLI for downloading GoJS samples, extensions, and docs
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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="Demonstrate context menus implemented in HTML covering the whole window." />
<meta itemprop="description" content="Demonstrate context menus implemented in HTML covering the whole window." />
<meta property="og:description" content="Demonstrate context menus implemented in HTML covering the whole window." />
<meta name="twitter:description" content="Demonstrate context menus implemented in HTML covering the whole window." />
<link rel="preconnect" href="https://rsms.me/">
<link rel="stylesheet" href="../assets/css/style.css">
<!-- Copyright 1998-2025 by Northwoods Software Corporation. -->
<meta itemprop="name" content="LightBox Style HTML Context Menu" />
<meta property="og:title" content="LightBox Style HTML Context Menu" />
<meta name="twitter:title" content="LightBox Style HTML Context Menu" />
<meta property="og:image" content="https://gojs.net/latest/assets/images/screenshots/htmllightboxcontextmenu.png" />
<meta itemprop="image" content="https://gojs.net/latest/assets/images/screenshots/htmllightboxcontextmenu.png" />
<meta name="twitter:image" content="https://gojs.net/latest/assets/images/screenshots/htmllightboxcontextmenu.png" />
<meta property="og:url" content="https://gojs.net/latest/samples/htmlLightBoxContextMenu.html" />
<meta property="twitter:url" content="https://gojs.net/latest/samples/htmlLightBoxContextMenu.html" />
<meta name="twitter:card" content="summary_large_image" />
<meta property="og:type" content="website" />
<meta property="twitter:domain" content="gojs.net" />
<title>
LightBox Style HTML Context Menu | GoJS Diagramming Library
</title>
</head>
<body>
<!-- This top nav is not part of the sample code -->
<nav id="navTop" class=" w-full h-[var(--topnav-h)] z-30 bg-white border-b border-b-gray-200">
<div class="max-w-screen-xl mx-auto flex flex-wrap items-start justify-between px-4">
<a class="text-white bg-nwoods-primary font-bold !leading-[calc(var(--topnav-h)_-_1px)] my-0 px-2 text-4xl lg:text-5xl logo"
href="../">
GoJS
</a>
<div class="relative">
<button id="topnavButton" class="h-[calc(var(--topnav-h)_-_1px)] px-2 m-0 text-gray-900 bg-inherit shadow-none md:hidden hover:!bg-inherit hover:!text-nwoods-accent hover:!shadow-none" aria-label="Navigation">
<svg class="h-7 w-7 block" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
<path d="M3.75 6.75h16.5M3.75 12h16.5m-16.5 5.25h16.5" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
</button>
<div id="topnavList" class="hidden md:block">
<div class="absolute right-0 z-30 flex flex-col items-end rounded border border-gray-200 p-4 pl-12 shadow bg-white text-gray-900 font-semibold
md:flex-row md:space-x-4 md:items-start md:border-0 md:p-0 md:shadow-none md:bg-inherit">
<a href="../learn/">Learn</a>
<a href="../samples/">Samples</a>
<a href="../intro/">Intro</a>
<a href="../api/">API</a>
<a href="../download.html">Download</a>
<a href="https://forum.nwoods.com/c/gojs/11" target="_blank" rel="noopener">Forum</a>
<a id="tc" href="https://nwoods.com/contact.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://nwoods.com/contact.html', 'contact');">Contact</a>
<a id="tb" href="https://nwoods.com/sales/index.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://nwoods.com/sales/index.html', 'buy');">Buy</a>
</div>
</div>
</div>
</div>
</nav>
<script>
window.addEventListener("DOMContentLoaded", function () {
// topnav
var topButton = document.getElementById("topnavButton");
var topnavList = document.getElementById("topnavList");
if (topButton && topnavList) {
topButton.addEventListener("click", function (e) {
topnavList
.classList
.toggle("hidden");
e.stopPropagation();
});
document.addEventListener("click", function (e) {
// if the clicked element isn't the list, close the list
if (!topnavList.classList.contains("hidden") && !e.target.closest("#topnavList")) {
topButton.click();
}
});
// set active <a> element
var url = window
.location
.href
.toLowerCase();
var aTags = topnavList.getElementsByTagName('a');
for (var i = 0; i < aTags.length; i++) {
var lowerhref = aTags[i]
.href
.toLowerCase();
if (lowerhref.endsWith('.html'))
lowerhref = lowerhref.slice(0, -5);
if (url.startsWith(lowerhref)) {
aTags[i]
.classList
.add('active');
break;
}
}
}
});
</script>
<div class="flex flex-col prose">
<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">
<style>
/* CSS for the lightbox context menu */
#cmLight {
top: 0px;
z-index: 10002;
position: fixed;
text-align: center;
left: 25%;
width: 50%;
background-color: #f5f5f5;
padding: 16px;
border: 16px solid #444;
border-radius: 10px;
margin-top: 10px;
}
#cmDark {
z-index: 10001;
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: black;
opacity: 0.8;
}
#cmLight ul {
list-style: none;
}
#cmLight li {
font: 700 1.5em Helvetica, Arial, sans-serif;
position: relative;
min-width: 60px;
}
#cmLight a {
color: #444;
display: inline-block;
padding: 4px;
text-decoration: none;
margin: 2px;
border: 1px solid gray;
border-radius: 10px;
}
</style>
<script src="../extensions/LightBoxContextMenu.js"></script>
<script id="code">
function init() {
// Initialize the Diagram
myDiagram = new go.Diagram('myDiagramDiv', { 'undoManager.isEnabled': true });
// define a simple Node template (but use the default Link template)
myDiagram.nodeTemplate =
new go.Node('Auto', {
contextMenu: window.myHTMLLightBox // window.myHTMLLightBox is defined in extensions/LightBoxContextMenu.js
})
.add(
new go.Shape('RoundedRectangle', { strokeWidth: 0 })
// Shape.fill is bound to Node.data.color
.bind('fill', 'color'),
new go.TextBlock({ margin: 8 }) // some room around the text
// TextBlock.text is bound to Node.data.text
.bind('text')
);
// create the model data that will be represented by Nodes and Links
myDiagram.model = new go.GraphLinksModel(
[
{ key: 1, text: 'Alpha', color: 'lightblue' },
{ key: 2, text: 'Beta', color: 'orange' },
{ key: 3, text: 'Gamma', color: 'lightgreen' },
{ key: 4, text: 'Delta', color: 'pink' }
],
[
{ from: 1, to: 2 },
{ from: 1, to: 3 },
{ from: 2, to: 2 },
{ from: 3, to: 4 },
{ from: 4, to: 1 }
]
);
myDiagram.contextMenu = window.myHTMLLightBox; // window.myHTMLLightBox is defined in extensions/LightBoxContextMenu.js
} // end init
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div style="display: inline-block">
<div style="position: relative">
<div id="myDiagramDiv" style="border: solid 1px black; width: 400px; height: 400px"></div>
</div>
<div id="description">
<p>
This demonstrates the implementation of a custom HTML context menu using <a>HTMLInfo</a>. This sample is also a re-implementation of the built-in
<a>ContextMenuTool.defaultTouchContextMenu</a>.
</p>
<p>
The implementation is contained in the files <a href="../extensions/LightBoxContextMenu.js">LightBoxContextMenu.js</a> and
<a href="../extensions/LightBoxContextMenu.css">LightBoxContextMenu.css</a>. The JavaScript file exposes <code>window.myHTMLLightBox</code>, which is
used in this file as the value of <code>myDiagram.contextMenu</code>.
</p>
<p>For a more regular HTML context menu implementation, see the <a href="customContextMenu.html">Custom Context Menu</a> sample.</p>
<p>
Right-click or tap-hold (mobile) on a Node to bring up a context menu. If you have a selection copied in the clipboard, you can bring up a context menu
anywhere to paste.
</p>
</div>
</div>
</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>Context Menus</h4>
<p>
A GoJS context menu is an <a href="../api/symbols/Adornment.html" target="api">Adornment</a> that is shown when the user context-clicks (right mouse click or long touch hold)
an object that has its <a href="../api/symbols/GraphObject.html#contextMenu" target="api">GraphObject.contextMenu</a> set.
The context menu is bound to the same data as the part itself.
</p>
<p>
It is typical to implement a context menu as a "ContextMenu" Panel containing "ContextMenuButton"s,
as you can see in the code below in the assignment of the Node's <a href="../api/symbols/GraphObject.html#contextMenu" target="api">GraphObject.contextMenu</a> and <a href="../api/symbols/Diagram.html#contextMenu" target="api">Diagram.contextMenu</a> properties.
Each "ContextMenu" is just a "Vertical" Panel <a href="../api/symbols/Adornment.html" target="api">Adornment</a> that is shadowed.
Each "ContextMenuButton" is a Panel on which you can set the <a href="../api/symbols/GraphObject.html#click" target="api">GraphObject.click</a> event handler.
In the event handler <code>obj.part</code> will be the whole context menu Adornment.
<code>obj.part.adornedPart</code> will be the adorned Node or Link.
The bound data is <code>obj.part.data</code>, which will be the same as <code>obj.part.adornedPart.data</code>.
</p>
<p>
More information can be found in the <a href="../intro/contextmenus.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#contextmenus">Related samples</a>
</p>
<hr>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>HTML Interaction</h4>
<p>
GoJS Diagrams can be used alongside other HTML elements in a webapp.
For custom Text Editors, Context Menus, and ToolTips, which are invoked and hidden via GoJS tool operations, it is best to use the <a href="../api/symbols/HTMLInfo.html" target="api">HTMLInfo</a> class.
</p>
<p>
More information can be found in the <a href="../intro/HTMLinteraction.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#html">Related samples</a>
</p>
<hr>
</div>
</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>