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euler.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Euler Diagram</title>
<meta name="description" content="A diagram showing nodes connected by different kinds of links with concentric circular backgrounds. Clicking on a node opens a window to a Wikipedia page." />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Copyright 1998-2019 by Northwoods Software Corporation. -->
<script src="../release/go.js"></script>
<script src="../extensions/HyperlinkText.js"></script>
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
<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 =
$(go.Diagram, "myDiagramDiv",
{ isReadOnly: true, allowSelect: false, contentAlignment: go.Spot.Center });
myDiagram.nodeTemplate =
$(go.Node, "Auto",
{ locationSpot: go.Spot.Center },
new go.Binding("location", "loc", go.Point.parse),
$(go.Shape, "Ellipse",
{ fill: "transparent" },
new go.Binding("stroke", "color"),
new go.Binding("strokeWidth", "width"),
new go.Binding("strokeDashArray", "dash")),
$("HyperlinkText",
function(node) { return "https://en.wikipedia.org/w/index.php?search=" + encodeURIComponent(node.data.text); },
function(node) { return node.data.text; },
{ margin: 1, maxSize: new go.Size(80, 80), textAlign: "center" })
);
myDiagram.nodeTemplateMap.add("center",
$(go.Node, "Spot",
{ locationSpot: go.Spot.Center },
new go.Binding("location", "loc", go.Point.parse),
$(go.Shape, "Circle",
{
fill: "rgba(128,128,128,0.1)", stroke: null,
width: 550, height: 550
}),
$(go.Shape, "Circle",
{
fill: "rgba(128,128,128,0.05)", stroke: null,
width: 400, height: 400
}),
$(go.Shape, "Circle",
{
fill: "rgba(128,128,128,0.033)", stroke: null,
width: 250, height: 250
}),
$(go.Panel, "Spot",
$(go.Shape, "Circle",
{ isPanelMain: true, fill: "transparent", portId: "" },
new go.Binding("stroke", "hicolor"),
new go.Binding("strokeWidth", "hiwidth")),
$(go.Shape, "Circle",
{ isPanelMain: true, fill: "transparent" },
new go.Binding("stroke", "color"),
new go.Binding("strokeWidth", "width"),
new go.Binding("strokeDashArray", "dash")),
$("HyperlinkText",
function(node) { return "https://en.wikipedia.org/w/index.php?search=" + encodeURIComponent(node.data.text); },
function(node) { return node.data.text; },
{ margin: 1, maxSize: new go.Size(80, 80), textAlign: "center" })
)
));
myDiagram.linkTemplate =
$(go.Link,
$(go.Shape,
new go.Binding("stroke", "color"),
new go.Binding("strokeWidth", "width"),
new go.Binding("strokeDashArray", "dash"))
);
var nodeDataArray = [
{ key: 1, text: "Cognitive Procedural", loc: "300 300", category: "center" },
{ key: 2, text: "Cognitive Problem Solving", loc: "600 300", category: "center", hicolor: "lightblue", hiwidth: 7 },
{ key: 11, text: "Logical Reasoning", loc: "450 275" },
{ key: 12, text: "Scaffolding", loc: "450 325" },
{ key: 13, text: "Part Task Training", loc: "425 400" },
{ key: 21, text: "Training Wheels", loc: "325 125" },
{ key: 22, text: "Exploratory Learning", loc: "250 150" },
{ key: 23, text: "Learner Control", loc: "650 150" },
{ key: 31, text: "Overlearning", loc: "450 475" }
];
var linkDataArray = [
{ from: 1, to: 11, color: "gray" },
{ from: 1, to: 12, color: "gray", dash: [3, 2] },
{ from: 1, to: 13, color: "olive", width: 2 },
{ from: 1, to: 21, color: "olive", width: 3 },
{ from: 1, to: 22, color: "olive", width: 2 },
{ from: 1, to: 23, color: "crimson", width: 2 },
{ from: 1, to: 31 },
{ from: 2, to: 11, color: "gray" },
{ from: 2, to: 12, color: "olive", width: 2 },
{ from: 2, to: 13, color: "gray", dash: [3, 2] },
{ from: 2, to: 21, color: "crimson", width: 2 },
{ from: 2, to: 22, color: "crimson", width: 2 },
{ from: 2, to: 23, color: "black", width: 3 },
{ from: 2, to: 31, color: "black", dash: [3, 2] }
];
myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);
}
</script>
</head>
<body onload="init()">
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:600px"></div>
<p> A sample of a Euler diagram: that is, a means of representing various sets and their relationships with one another. Euler diagrams have much in common with Venn diagrams.
This diagram is read-only, but clicking on a node will search Wikipedia
with a query string generated from the "text" property of the node data.
</p>
</div>
</body>
</html>