gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
289 lines (262 loc) • 12.7 kB
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="Context menus implemented in HTML rather than as GoJS objects."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>HTML Context Menu</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>
</div>
<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">
<path id="topnavOpen" fill-rule="evenodd" d="M3 5a1 1 0 011-1h12a1 1 0 110 2H4a1 1 0 01-1-1zM3 10a1 1 0 011-1h12a1 1 0 110 2H4a1 1 0 01-1-1zM9 15a1 1 0 011-1h6a1 1 0 110 2h-6a1 1 0 01-1-1z" clip-rule="evenodd"></path>
<path id="topnavClosed" class="hidden" fill-rule="evenodd" d="M4.293 4.293a1 1 0 011.414 0L10 8.586l4.293-4.293a1 1 0 111.414 1.414L11.414 10l4.293 4.293a1 1 0 01-1.414 1.414L10 11.414l-4.293 4.293a1 1 0 01-1.414-1.414L8.586 10 4.293 5.707a1 1 0 010-1.414z" clip-rule="evenodd"></path>
</svg>
</button>
<div id="topnavList" class="hidden sm:block items-center w-auto mt-0 text-white p-0 z-20">
<ul class="list-reset list-none font-semibold flex justify-end flex-wrap sm:flex-nowrap items-center px-0 pb-0">
<li class="p-1 sm:p-0"><a class="topnav-link" href="../learn/">Learn</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="../samples/">Samples</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="../intro/">Intro</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="../api/">API</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/products/register.html">Register</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="../download.html">Download</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="https://forum.nwoods.com/c/gojs/11">Forum</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/contact.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/contact.html', 'contact');">Contact</a></li>
<li class="p-1 sm:p-0"><a class="topnav-link" href="https://www.nwoods.com/sales/index.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/sales/index.html', 'buy');">Buy</a></li>
</ul>
</div>
</div>
<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">
<style type="text/css">
/* CSS for the traditional context menu */
.menu {
display: none;
position: absolute;
opacity: 0;
margin: 0;
padding: 8px 0;
z-index: 999;
box-shadow: 0 5px 5px -3px rgba(0, 0, 0, .2), 0 8px 10px 1px rgba(0, 0, 0, .14), 0 3px 14px 2px rgba(0, 0, 0, .12);
list-style: none;
background-color: #ffffff;
border-radius: 4px;
}
.menu-item {
display: block;
position: relative;
min-width: 60px;
margin: 0;
padding: 6px 16px;
font: bold 12px sans-serif;
color: rgba(0, 0, 0, .87);
cursor: pointer;
}
.menu-item::before {
position: absolute;
top: 0;
left: 0;
opacity: 0;
pointer-events: none;
content: "";
width: 100%;
height: 100%;
background-color: #000000;
}
.menu-item:hover::before {
opacity: .04;
}
.menu .menu {
top: -8px;
left: 100%;
}
.show-menu, .menu-item:hover > .menu {
display: block;
opacity: 1;
}
</style>
<script id="code">
var myDiagram = null;
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
// 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", // create a Diagram for the DIV HTML element
{
"undoManager.isEnabled": true
});
// This is the actual HTML context menu:
var cxElement = document.getElementById("contextMenu");
// an HTMLInfo object is needed to invoke the code to set up the HTML cxElement
var myContextMenu = $(go.HTMLInfo, {
show: showContextMenu,
hide: hideContextMenu
});
// define a simple Node template (but use the default Link template)
myDiagram.nodeTemplate =
$(go.Node, "Auto",
{ contextMenu: myContextMenu },
$(go.Shape, "RoundedRectangle",
// Shape.fill is bound to Node.data.color
new go.Binding("fill", "color")),
$(go.TextBlock,
{ margin: 3 }, // some room around the text
// TextBlock.text is bound to Node.data.key
new go.Binding("text", "key"))
);
// create the model data that will be represented by Nodes and Links
myDiagram.model = new go.GraphLinksModel(
[
{ key: "Alpha", color: "#f38181" },
{ key: "Beta", color: "#eaffd0" },
{ key: "Gamma", color: "#95e1d3" },
{ key: "Delta", color: "#fce38a" }
],
[
{ from: "Alpha", to: "Beta" },
{ from: "Alpha", to: "Gamma" },
{ from: "Beta", to: "Beta" },
{ from: "Gamma", to: "Delta" },
{ from: "Delta", to: "Alpha" }
]);
myDiagram.contextMenu = myContextMenu;
// We don't want the div acting as a context menu to have a (browser) context menu!
cxElement.addEventListener("contextmenu", e => {
e.preventDefault();
return false;
}, false);
function hideCX() {
if (myDiagram.currentTool instanceof go.ContextMenuTool) {
myDiagram.currentTool.doCancel();
}
}
function showContextMenu(obj, diagram, tool) {
// Show only the relevant buttons given the current state.
var cmd = diagram.commandHandler;
var hasMenuItem = false;
function maybeShowItem(elt, pred) {
if (pred) {
elt.style.display = "block";
hasMenuItem = true;
} else {
elt.style.display = "none";
}
}
maybeShowItem(document.getElementById("cut"), cmd.canCutSelection());
maybeShowItem(document.getElementById("copy"), cmd.canCopySelection());
maybeShowItem(document.getElementById("paste"), cmd.canPasteSelection(diagram.toolManager.contextMenuTool.mouseDownPoint));
maybeShowItem(document.getElementById("delete"), cmd.canDeleteSelection());
maybeShowItem(document.getElementById("color"), obj !== null);
// Now show the whole context menu element
if (hasMenuItem) {
cxElement.classList.add("show-menu");
// we don't bother overriding positionContextMenu, we just do it here:
var mousePt = diagram.lastInput.viewPoint;
cxElement.style.left = mousePt.x + 5 + "px";
cxElement.style.top = mousePt.y + "px";
}
// Optional: Use a `window` pointerdown listener with event capture to
// remove the context menu if the user clicks elsewhere on the page
window.addEventListener("pointerdown", hideCX, true);
}
function hideContextMenu() {
cxElement.classList.remove("show-menu");
// Optional: Use a `window` pointerdown listener with event capture to
// remove the context menu if the user clicks elsewhere on the page
window.removeEventListener("pointerdown", hideCX, true);
}
}
// This is the general menu command handler, parameterized by the name of the command.
function cxcommand(event, val) {
if (val === undefined) val = event.currentTarget.id;
var diagram = myDiagram;
switch (val) {
case "cut": diagram.commandHandler.cutSelection(); break;
case "copy": diagram.commandHandler.copySelection(); break;
case "paste": diagram.commandHandler.pasteSelection(diagram.toolManager.contextMenuTool.mouseDownPoint); break;
case "delete": diagram.commandHandler.deleteSelection(); break;
case "color": {
var color = window.getComputedStyle(event.target)['background-color'];
changeColor(diagram, color); break;
}
}
diagram.currentTool.stopTool();
}
// A custom command, for changing the color of the selected node(s).
function changeColor(diagram, color) {
// Always make changes in a transaction, except when initializing the diagram.
diagram.startTransaction("change color");
diagram.selection.each(node => {
if (node instanceof go.Node) { // ignore any selected Links and simple Parts
// Examine and modify the data, not the Node directly.
var data = node.data;
// Call setDataProperty to support undo/redo as well as
// automatically evaluating any relevant bindings.
diagram.model.setDataProperty(data, "color", color);
}
});
diagram.commitTransaction("change color");
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div style="display: inline-block;">
<!-- We make a div to contain both the Diagram div and the context menu (such that they are siblings)
so that absolute positioning works easily.
This DIV containing both MUST have a non-static CSS position (we use position: relative)
so that our context menu's absolute coordinates work correctly. -->
<div style="position: relative;" >
<div id="myDiagramDiv" style="border: solid 1px black; width:400px; height:400px"></div>
<ul id="contextMenu" class="menu">
<li id="cut" class="menu-item" onpointerdown="cxcommand(event)">Cut</li>
<li id="copy" class="menu-item" onpointerdown="cxcommand(event)">Copy</li>
<li id="paste" class="menu-item" onpointerdown="cxcommand(event)">Paste</li>
<li id="delete" class="menu-item" onpointerdown="cxcommand(event)">Delete</li>
<li id="color" class="menu-item">Color
<ul class="menu">
<li class="menu-item" style="background-color: #f38181;" onpointerdown="cxcommand(event, 'color')">Red</li>
<li class="menu-item" style="background-color: #eaffd0;" onpointerdown="cxcommand(event, 'color')">Green</li>
<li class="menu-item" style="background-color: #95e1d3;" onpointerdown="cxcommand(event, 'color')">Blue</li>
<li class="menu-item" style="background-color: #fce38a;" onpointerdown="cxcommand(event, 'color')">Yellow</li>
</ul>
</li>
</ul>
</div>
<div id="description">
<p>This demonstrates the implementation of a custom HTML context menu.</p>
<p>For a light-box style HTML context menu implementation, see the <a href="htmlLightBoxContextMenu.html">LightBox Context Menu</a> sample.</p>
<p>Right-click or tap-hold 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>
</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>