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="An example of having the user customize a Palette by adding copies of Diagram nodes to the Palette's Model."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Adding a Custom Node to a Palette</title>
</head>
<body>
<!-- This top nav is not part of the sample code -->
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<h1 class="my-0 p-1 ">GoJS</h1>
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<!-- * * * * * * * * * * * * * -->
<!-- Start of GoJS sample code -->
<script src="../release/go.js"></script>
<div id="allSampleContent" class="p-4 w-full">
<script src="../extensions/Figures.js"></script>
<link rel='stylesheet' href='../extensions/DataInspector.css' />
<script src="../extensions/DataInspector.js"></script>
<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;
// initialize main Diagram
myDiagram =
new go.Diagram("myDiagramDiv",
{
"undoManager.isEnabled": true
});
myDiagram.nodeTemplate =
$(go.Node, "Auto",
{ locationSpot: go.Spot.Center },
new go.Binding("location", "location", go.Point.parse).makeTwoWay(go.Point.stringify),
$(go.Shape, "Circle",
{
fill: "white", stroke: "gray", strokeWidth: 2,
portId: "", fromLinkable: true, toLinkable: true,
fromLinkableDuplicates: true, toLinkableDuplicates: true,
fromLinkableSelfNode: true, toLinkableSelfNode: true
},
new go.Binding("stroke", "color"),
new go.Binding("figure")),
$(go.TextBlock,
{
margin: new go.Margin(5, 5, 3, 5), font: "10pt sans-serif",
minSize: new go.Size(16, 16), maxSize: new go.Size(120, NaN),
textAlign: "center", editable: true
},
new go.Binding("text").makeTwoWay())
);
// initialize Palette
myPalette =
new go.Palette("myPaletteDiv",
{
nodeTemplate: myDiagram.nodeTemplate,
contentAlignment: go.Spot.Center,
layout:
$(go.GridLayout,
{ wrappingColumn: 1, cellSize: new go.Size(2, 2) }),
"ModelChanged": e => { // just for demonstration purposes,
if (e.isTransactionFinished) { // show the model data in the page's TextArea
document.getElementById("mySavedPaletteModel").textContent = e.model.toJson();
}
}
});
// now add the initial contents of the Palette
myPalette.model.nodeDataArray = [
{ text: "Circle", color: "blue", figure: "Circle" },
{ text: "Square", color: "purple", figure: "Square" },
{ text: "Ellipse", color: "orange", figure: "Ellipse" },
{ text: "Rectangle", color: "red", figure: "Rectangle" },
{ text: "Rounded\nRectangle", color: "green", figure: "RoundedRectangle" },
{ text: "Triangle", color: "purple", figure: "Triangle" },
];
// initialize Overview
myOverview =
new go.Overview("myOverviewDiv",
{
observed: myDiagram,
contentAlignment: go.Spot.Center
});
var inspector = new Inspector('myInspectorDiv', myDiagram,
{
// uncomment this line to only inspect the named properties below instead of all properties on each object:
// includesOwnProperties: false,
properties: {
"text": {},
// key would be automatically added for nodes, but we want to declare it read-only also:
"key": { readOnly: true, show: Inspector.showIfPresent },
// color would be automatically added for nodes, but we want to declare it a color also:
"color": { type: 'color' },
"figure": {}
}
});
load();
}
// Show the diagram's model in JSON format
function save() {
document.getElementById("mySavedModel").value = myDiagram.model.toJson();
myDiagram.isModified = false;
}
function load() {
myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
}
function addToPalette() {
var node = myDiagram.selection.filter(p => p instanceof go.Node).first();
if (node !== null) {
myPalette.startTransaction();
var item = myPalette.model.copyNodeData(node.data);
myPalette.model.addNodeData(item);
myPalette.commitTransaction("added item to palette");
}
}
// The user cannot delete selected nodes in the Palette with the Delete key or Control-X,
// but they can if they do so programmatically.
function removeFromPalette() {
myPalette.commandHandler.deleteSelection();
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div style="width:100%; white-space:nowrap;">
<span style="display: inline-block; vertical-align: top; padding: 2px; width:140px">
<div id="myPaletteDiv" style="background-color: whitesmoke; border: solid 1px black; height: 400px"></div>
<div id="myOverviewDiv" style="border: solid 1px black; height: 100px"></div>
</span>
<span style="display: inline-block; vertical-align: top; padding: 2px; width:500px">
<div id="myDiagramDiv" style="border: solid 1px black; height: 500px"></div>
</span>
<span style="display: inline-block; vertical-align: top; padding: 2px; width:200px">
<div id="myInspectorDiv" class="inspector"></div>
</span>
</div>
<p>
This sample supports the normal kind of drag-and-drop from a <a>Palette</a> to a <a>Diagram</a>.
The Data <a>Inspector</a> allows you to edit the properties of a selected node in the diagram.
</p>
<p>
This sample also supports dynamically adding a copy of a selected node in the diagram to the
palette by the "Add To Palette" button.
See the current state of the palette's model in the top textarea.
The palette is <a>Diagram.isReadOnly</a>, so the user cannot delete selected nodes from the palette.
But the "Delete From Palette" button removes any selected nodes from the palette.
</p>
<div>
<button onclick="addToPalette()">Add To Palette</button>
<button onclick="removeFromPalette()">Delete From Palette</button>
Palette model:
</div>
<textarea id="mySavedPaletteModel" style="width:100%;height:200px"></textarea>
<div>
<button id="loadModel" onclick="load()">Load</button>
<button id="saveModel" onclick="save()">Save</button>
Diagram model:
</div>
<textarea id="mySavedModel" style="width:100%;height:200px">
{ "class": "go.GraphLinksModel",
"nodeDataArray": [
{ "key": 1, "text": "hello", "figure":"Circle", "color":"green", "location":"0 0" },
{ "key": 2, "text": "world", "figure":"Rectangle", "color":"red", "location":"100 0" }
],
"linkDataArray": [
{ "from":1, "to":2 }
]}
</textarea>
</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>