gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
219 lines (204 loc) • 10.6 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="Show all of the predefined kinds of arrowheads for links, which can be used by setting Shape.toArrow or Shape.fromArrow."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>GoJS Arrowheads</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">
<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
var myDiagram =
new go.Diagram("myDiagramDiv", // create a Diagram for the DIV HTML element
{
isReadOnly: true, // don't allow move or delete
layout: $(go.CircularLayout,
{
radius: 100, // minimum radius
spacing: 0, // circular nodes will touch each other
nodeDiameterFormula: go.CircularLayout.Circular, // assume nodes are circular
startAngle: 270 // first node will be at top
}),
// define a DiagramEvent listener
"LayoutCompleted": e => {
// now that the CircularLayout has finished, we know where its center is
var cntr = myDiagram.findNodeForKey("Center");
cntr.location = myDiagram.layout.actualCenter;
}
});
// construct a shared radial gradient brush
var radBrush = $(go.Brush, "Radial", { 0: "#550266", 1: "#80418C" });
// these are the nodes that are in a circle
myDiagram.nodeTemplate =
$(go.Node,
$(go.Shape, "Circle",
{
desiredSize: new go.Size(28, 28),
fill: radBrush, strokeWidth: 0, stroke: null
}), // no outline
{
locationSpot: go.Spot.Center,
click: showArrowInfo, // defined below
toolTip: // define a tooltip for each link that displays its information
$("ToolTip",
$(go.TextBlock, { margin: 4 },
new go.Binding("text", "", infoString).ofObject())
)
}
);
// use a special template for the center node
myDiagram.nodeTemplateMap.add("Center",
$(go.Node, "Spot",
{
selectable: false,
isLayoutPositioned: false, // the Diagram.layout will not position this node
locationSpot: go.Spot.Center
},
$(go.Shape, "Circle",
{ fill: radBrush, strokeWidth: 0, stroke: null, desiredSize: new go.Size(200, 200) }), // no outline
$(go.TextBlock, "Arrowheads",
{ margin: 1, stroke: "white", font: "bold 14px sans-serif" })
));
// all Links have both "toArrow" and "fromArrow" Shapes,
// where both arrow properties are data bound
myDiagram.linkTemplate =
$(go.Link, // the whole link panel
{ routing: go.Link.Normal },
$(go.Shape, // the link shape
// the first element is assumed to be main element: as if isPanelMain were true
{ stroke: "gray", strokeWidth: 2 }),
$(go.Shape, // the "from" arrowhead
new go.Binding("fromArrow", "fromArrow"),
{ scale: 2, fill: "#D4B52C" }),
$(go.Shape, // the "to" arrowhead
new go.Binding("toArrow", "toArrow"),
{ scale: 2, fill: "#D4B52C" }),
{
click: showArrowInfo,
toolTip: // define a tooltip for each link that displays its information
$("ToolTip",
$(go.TextBlock, { margin: 4 },
new go.Binding("text", "", infoString).ofObject())
)
}
);
// collect all of the predefined arrowhead names
var arrowheads = go.Shape.getArrowheadGeometries().toKeySet().toArray();
if (arrowheads.length % 2 === 1) arrowheads.push(""); // make sure there's an even number
// create all of the link data, two arrowheads per link
var linkdata = [];
var i = 0;
for (var j = 0; j < arrowheads.length; j = j + 2) {
linkdata.push({ from: "Center", to: i++, toArrow: arrowheads[j], fromArrow: arrowheads[j + 1] });
}
myDiagram.model =
new go.GraphLinksModel(
{ // this gets copied automatically when there's a link data reference to a new node key
// and is then added to the nodeDataArray
archetypeNodeData: {},
// the node array starts with just the special Center node
nodeDataArray: [{ category: "Center", key: "Center" }],
// the link array was created above
linkDataArray: linkdata
});
}
// a conversion function used to get arrowhead information for a Part
function infoString(obj) {
var part = obj.part;
if (part instanceof go.Adornment) part = part.adornedPart;
var msg = "";
if (part instanceof go.Link) {
var link = part;
msg = "toArrow: " + link.data.toArrow + ";\nfromArrow: " + link.data.fromArrow;
} else if (part instanceof go.Node) {
var node = part;
var link = node.linksConnected.first();
msg = "toArrow: " + link.data.toArrow + ";\nfromArrow: " + link.data.fromArrow;
}
return msg;
}
// a GraphObject.click event handler to show arrowhead information
function showArrowInfo(e, obj) {
var msg = infoString(obj);
if (msg) {
var status = document.getElementById("myArrowheadInfo");
if (status) status.textContent = msg;
}
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<!-- The DIV for the Diagram needs an explicit size or else we won't see anything.
Also add a border to help see the edges. -->
<div id="myDiagramDiv" style="border: solid 1px black; width:600px; height:500px"></div>
<div id="myArrowheadInfo" style="color:red"></div>
<p>
This sample displays all predefined GoJS arrowheads.
Select or hover over a Node or its Link to see the names of the arrowheads on the Link.
</p>
<p>
Each Link shows two arrowheads.
The Link template has a Shape whose <a>Shape.toArrow</a> property is bound to an arrowhead name.
A different Shape in the template has its <a>Shape.fromArrow</a> property bound to a different arrowhead name.
Each arrowhead has been scaled up to make it more easily visible.
</p>
<p>
See the definitions of all these arrowheads in the file: <a href="../extensions/Arrowheads.js" target="_blank">Arrowheads.js</a>.
</p>
<p>
For predefined shape geometries, see the <a href="shapes.html">Shapes</a> sample.
</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>