gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
161 lines (152 loc) • 8.07 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="This variation on the LinkLabelDraggingTool extension restricts link labels to stay on the link's route while the user is dragging it."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Draggable Link Labels That Stay On Path</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 src="LinkLabelOnPathDraggingTool.js"></script>
<script id="code">
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
var $ = go.GraphObject.make;
myDiagram =
new go.Diagram("myDiagramDiv", // the ID of the DIV HTML element
{
layout: $(go.ForceDirectedLayout,
{ defaultSpringLength: 50, defaultElectricalCharge: 50 }),
"undoManager.isEnabled": true
});
// install the LinkLabelDraggingTool as a "mouse move" tool
myDiagram.toolManager.mouseMoveTools.insertAt(0, new LinkLabelOnPathDraggingTool());
myDiagram.nodeTemplate =
$(go.Node, go.Panel.Auto,
{ locationSpot: go.Spot.Center },
$(go.Shape,
{
fill: "orange", // default fill color
portId: "",
fromLinkable: true,
fromSpot: go.Spot.AllSides,
toLinkable: true,
toSpot: go.Spot.AllSides,
cursor: "pointer"
},
new go.Binding("fill", "color")),
$(go.TextBlock,
{ margin: 10, font: "bold 12pt sans-serif" },
new go.Binding("text"))
);
myDiagram.linkTemplate =
$(go.Link,
{
routing: go.Link.AvoidsNodes,
corner: 5,
relinkableFrom: true,
relinkableTo: true,
reshapable: true,
resegmentable: true
},
$(go.Shape),
$(go.Shape, { toArrow: "OpenTriangle" }),
$(go.Panel, "Auto",
// mark this Panel as being a draggable label, and set default segment props
{ _isLinkLabel: true, segmentIndex: NaN, segmentFraction: .5 },
$(go.Shape, { fill: "white" }),
$(go.TextBlock, "?", { margin: 3 },
new go.Binding("text", "color")),
// remember any modified segment properties in the link data object
new go.Binding("segmentFraction").makeTwoWay()
)
);
// create a few nodes and links
myDiagram.model = new go.GraphLinksModel([
{ key: 1, text: "one", color: "lightyellow" },
{ key: 2, text: "two", color: "brown" },
{ key: 3, text: "three", color: "green" },
{ key: 4, text: "four", color: "slateblue" },
{ key: 5, text: "five", color: "aquamarine" },
{ key: 6, text: "six", color: "lightgreen" },
{ key: 7, text: "seven" }
], [
{ from: 5, to: 6, color: "orange" },
{ from: 1, to: 2, color: "red" },
{ from: 1, to: 3, color: "blue" },
{ from: 1, to: 4, color: "goldenrod" },
{ from: 2, to: 5, color: "fuchsia" },
{ from: 3, to: 5, color: "green" },
{ from: 4, to: 5, color: "black" },
{ from: 6, to: 7 }
]);
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="background-color: whitesmoke; border: solid 1px black; width: 100%; height: 600px"></div>
<p>
This sample demonstrates a custom Tool, LinkLabelOnPathDraggingTool, that allows the user to drag the label of a Link,
but that keeps the label exactly on the path of the link.
The tool is defined at <a href="LinkLabelOnPathDraggingTool.js">LinkLabelOnPathDraggingTool.js</a>.
</p>
<p>
The label on the link can be any arbitrarily complex object.
It is positioned by the <a>GraphObject.segmentIndex</a> and <a>GraphObject.segmentFraction</a> properties.
The segmentIndex is set to NaN such that the whole link path acts as the segment, and the segmentFraction is set by the LinkLabelOnPathDraggingTool.
A two-way data binding on segmentFraction automatically remembers any modified value on the link data object in the model.
</p>
<p>
The tool is derived from a similar tool, <a href="LinkLabelDraggingTool.js">LinkLabelDraggingTool.js</a>,
that allows the user to drag the label in any direction from the mid-point of the Link path.
</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>