gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
257 lines (239 loc) • 11.1 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="A diagram where each node contains a chart rendered by Chart.js."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Various Charts in GoJS Nodes</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="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.bundle.min.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;
myDiagram =
new go.Diagram("myDiagramDiv",
{
layout: $(go.TreeLayout)
});
myDiagram.nodeTemplate =
$(go.Node, "Vertical",
$(go.Panel, "Auto",
$(go.Shape, { fill: "transparent" },
new go.Binding("stroke", "color")),
$(go.Picture,
{ width: 300, height: 150, portId: "" },
new go.Binding("element", "datasets", makeLineChart))
),
$(go.TextBlock,
{ margin: 8 },
new go.Binding("text"))
);
// This Binding conversion function creates a Canvas element for a Picture
// that has a rendering of a line chart drawn by Chart.js.
function makeLineChart(datasets, picture) {
var canvases = document.getElementById("myCanvases");
canv = document.createElement("canvas");
canv.width = canv.style.width = "600px";
canv.height = canv.style.height = "300px";
// apparently Chart.js expects the Canvas to be in a DIV
var div = document.createElement("div");
div.style.position = "absolute";
div.appendChild(canv);
// add the DIV/Canvas to the DOM, temporarily
canvases.appendChild(div);
var config = { // Chart.js configuration, including the DATASETS data from the model data
type: "line",
data: {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: datasets
},
options: {
animation: {
onProgress: () => picture.redraw(),
onComplete: () => {
var canvases = document.getElementById("myCanvases");
if (canvases) { // remove the Canvas that was in the DOM for rendering
canvases.removeChild(div);
}
picture.redraw();
}
}
}
};
new Chart(canv, config);
return canv;
}
myDiagram.model = new go.GraphLinksModel(
{
copiesArrays: true,
copiesArrayObjects: true,
nodeDataArray:
[
{
key: 1, text: "Alpha",
datasets: [{
label: "Random data",
borderColor: "black",
data: makeRandomPoints(8, 10)
}]
},
{
key: 2, text: "Beta",
datasets: [{
label: "First dataset",
fill: false,
backgroundColor: "red",
borderColor: "red",
data: makeRandomPoints(8)
}, {
label: "Second dataset",
fill: false,
backgroundColor: "blue",
borderColor: "blue",
data: makeRandomPoints(8)
}]
},
{
key: 3, text: "Gamma", color: "green",
datasets: [{
label: "some data",
fill: false,
backgroundColor: "green",
borderColor: "green",
data: makeRandomPoints()
}]
}
],
linkDataArray: [
{ from: 1, to: 2 },
{ from: 1, to: 3 }
]
});
}
function makeRandomPoints(num, range) {
if (!num) num = 20;
if (!range) range = 100;
var pts = [];
for (var i = 0; i < num; i++) {
pts.push(Math.random() * range);
}
return pts;
}
function addNode() {
myDiagram.model.commit(m => {
var firstnode = myDiagram.nodes.first();
var color = go.Brush.darken(go.Brush.randomColor());
var data = {
text: "Node " + (myDiagram.nodes.count + 1),
color: color,
datasets: [{
label: "some data",
fill: false,
backgroundColor: color,
borderColor: color,
data: makeRandomPoints()
}]
};
m.addNodeData(data);
if (firstnode) {
m.addLinkData({ from: firstnode.key, to: m.getKeyForNodeData(data) });
// new node starts off at same location as the parent node
var newnode = myDiagram.findNodeForData(data);
if (newnode) newnode.location = firstnode.location;
}
}, "added chart node");
}
function modifyNodes() {
myDiagram.commit(diag => {
diag.selection.each(node => {
var oldset = node.data.datasets;
if (!oldset) return; // if it's a link, there's no datasets property
diag.model.set(node.data, "datasets",
[{
label: oldset[0].label,
fill: false,
backgroundColor: oldset[0].backgroundColor,
borderColor: oldset[0].borderColor,
data: makeRandomPoints()
}]);
});
}, "modified selected nodes");
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:600px"></div>
<button onclick="addNode()">Add Chart</button>
<button onclick="modifyNodes()">Modify Charts of Selected Nodes</button>
<p>
This app demonstrates using a popular charting library, <a href="https://chartjs.org">Chart.js</a>,
for rendering charts within nodes.
</p>
<p>
The data for each chart is stored on the node data in the model. In this case the <code>datasets</code>
property value has the same properties that are expected by the Chart.js configuration, but you could
organize the data however you want.
</p>
<p>
The <code>makeLineChart</code> conversion function is used by a <a>Binding</a> on <a>Picture.element</a>
to generate a Canvas element that can be shown in the node. Most of the implementation of that function
is specific to Chart.js. The rendering requires the Canvas to be in the HTML DOM. To avoid accumulating
resources, the configuration of the chart defines an <code>onComplete</code> event handler to
remove the Canvas element from the DOM. That allows any future removal of the Node from the Diagram not
to leave an unused Canvas element behind.
</p>
<!-- myCanvases is used by makeLineChart, but need not be seen by the user -->
<div id="myCanvases" style="position:absolute; top:0px; left:0px; width:0px; height:0px; opacity:0"></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>