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<!DOCTYPE html>
<html>
<head>
<title>Concept Map with animation along paths</title>
<meta name="description" content="Animating diagram parts to travel along link paths." />
<!-- Copyright 1998-2016 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<script src="go.js"></script>
<link href="../assets/css/goSamples.css" rel="stylesheet" type="text/css" /> <!-- you don't need to use this -->
<script src="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; // for conciseness in defining templates
myDiagram =
$(go.Diagram, "myDiagramDiv", // must name or refer to the DIV HTML element
{
initialAutoScale: go.Diagram.Uniform, // an initial automatic zoom-to-fit
contentAlignment: go.Spot.Center, // align document to the center of the viewport
layout:
$(go.ForceDirectedLayout, // automatically spread nodes apart
{ defaultSpringLength: 30, defaultElectricalCharge: 100 }),
"undoManager.isEnabled": true
});
// define each Node's appearance
myDiagram.nodeTemplate =
$(go.Node, "Auto", // the whole node panel
{ locationSpot: go.Spot.Center },
// define the node's outer shape, which will surround the TextBlock
$(go.Shape, "Rectangle",
{ fill: $(go.Brush, "Linear", { 0: "rgb(254, 201, 0)", 1: "rgb(254, 162, 0)" }), stroke: "black" }),
$(go.TextBlock,
{ font: "bold 10pt helvetica, bold arial, sans-serif", margin: new go.Margin(4, 4, 3, 20)},
new go.Binding("text", "text"))
);
// replace the default Link template in the linkTemplateMap
myDiagram.linkTemplate =
$(go.Link, // the whole link panel
$(go.Shape, // the link shape
{ stroke: "black" }),
$(go.Shape, // the arrowhead
{ toArrow: "standard", stroke: null }),
$(go.Panel, "Auto",
$(go.Shape, // the label background, which becomes transparent around the edges
{ fill: $(go.Brush, "Radial", { 0: "rgb(240, 240, 240)", 0.3: "rgb(240, 240, 240)", 1: "rgba(240, 240, 240, 0)" }),
stroke: null }),
$(go.TextBlock, // the label text
{ textAlign: "center",
font: "10pt helvetica, arial, sans-serif",
stroke: "#555555",
margin: 4 },
new go.Binding("text", "text"))
)
);
myDiagram.nodeTemplateMap.add("token",
$(go.Part,
{ locationSpot: go.Spot.Center, layerName: "Foreground" },
$(go.Shape, "Circle",
{ width: 12, height: 12, fill: "green", strokeWidth: 0 },
new go.Binding("fill", "color"))
));
// create the model for the concept map
var nodeDataArray = [
{ key: 1, text: "Concept Maps" },
{ key: 2, text: "Organized Knowledge" },
{ key: 3, text: "Context Dependent" },
{ key: 4, text: "Concepts" },
{ key: 5, text: "Propositions" },
{ key: 6, text: "Associated Feelings or Affect" },
{ key: 7, text: "Perceived Regularities" },
{ key: 8, text: "Labeled" },
{ key: 9, text: "Hierarchically Structured" },
{ key: 10, text: "Effective Teaching" },
{ key: 11, text: "Crosslinks" },
{ key: 12, text: "Effective Learning" },
{ key: 13, text: "Events (Happenings)" },
{ key: 14, text: "Objects (Things)" },
{ key: 15, text: "Symbols" },
{ key: 16, text: "Words" },
{ key: 17, text: "Creativity" },
{ key: 18, text: "Interrelationships" },
{ key: 19, text: "Infants" },
{ key: 20, text: "Different Map Segments" }
];
var linkDataArray = [
{ from: 1, to: 2, text: "represent" },
{ from: 2, to: 3, text: "is" },
{ from: 2, to: 4, text: "is" },
{ from: 2, to: 5, text: "is" },
{ from: 2, to: 6, text: "includes" },
{ from: 2, to: 10, text: "necessary\nfor" },
{ from: 2, to: 12, text: "necessary\nfor" },
{ from: 4, to: 5, text: "combine\nto form" },
{ from: 4, to: 6, text: "include" },
{ from: 4, to: 7, text: "are" },
{ from: 4, to: 8, text: "are" },
{ from: 4, to: 9, text: "are" },
{ from: 5, to: 9, text: "are" },
{ from: 5, to: 11, text: "may be" },
{ from: 7, to: 13, text: "in" },
{ from: 7, to: 14, text: "in" },
{ from: 7, to: 19, text: "begin\nwith" },
{ from: 8, to: 15, text: "with" },
{ from: 8, to: 16, text: "with" },
{ from: 9, to: 17, text: "aids" },
{ from: 11, to: 18, text: "show" },
{ from: 12, to: 19, text: "begins\nwith" },
{ from: 17, to: 18, text: "needed\nto see" },
{ from: 18, to: 20, text: "between" }
];
myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);
initTokens();
}
function initTokens() {
var oldskips = myDiagram.skipsUndoManager;
myDiagram.skipsUndoManager = true;
myDiagram.model.addNodeDataCollection([
{ category: "token", at: 1, color: "green" },
{ category: "token", at: 2, color: "blue" },
{ category: "token", at: 4, color: "yellow" },
{ category: "token", at: 5, color: "purple" },
{ category: "token", at: 7, color: "red" },
{ category: "token", at: 8, color: "black" },
{ category: "token", at: 9, color: "green" },
{ category: "token", at: 11, color: "blue" },
{ category: "token", at: 12, color: "yellow" },
{ category: "token", at: 17, color: "purple" },
{ category: "token", at: 18, color: "red" }
]);
myDiagram.skipsUndoManager = oldskips;
window.requestAnimationFrame(updateTokens);
}
function updateTokens() {
var oldskips = myDiagram.skipsUndoManager;
myDiagram.skipsUndoManager = true;
myDiagram.parts.each(function(token) {
var data = token.data;
var at = data.at;
if (at === undefined) return;
var from = myDiagram.findNodeForKey(at);
if (from === null) return;
var frac = data.frac;
if (frac === undefined) frac = 0.0;
var next = data.next;
var to = myDiagram.findNodeForKey(next);
if (to === null) { // nowhere to go?
positionTokenAtNode(token, from); // temporarily stay at the current node
data.next = chooseDestination(token, from); // and decide where to go next
} else { // proceed toward the
var link = from.findLinksTo(to).first();
if (link !== null) {
// assume straight lines, for now
var start = link.getPoint(0);
var end = link.getPoint(link.pointsCount - 1);
var x = start.x + frac * (end.x - start.x);
var y = start.y + frac * (end.y - start.y);
token.location = new go.Point(x, y);
} else { // stay at the current node
positionTokenAtNode(token, from);
}
if (frac >= 1.0) { // if beyond the end, it's "AT" the NEXT node
data.frac = 0.0;
data.at = next;
data.next = undefined; // don't know where to go next
} else { // otherwise, move fractionally closer to the NEXT node
data.frac = frac + 0.01;
}
}
});
myDiagram.skipsUndoManager = oldskips;
window.requestAnimationFrame(updateTokens);
}
// determine where to position a token when it is resting at a node
function positionTokenAtNode(token, node) {
// these details depend on the node template
token.location = node.position.copy().offset(4 + 6, 5 + 6);
}
function chooseDestination(token, node) {
var dests = new go.List().addAll(node.findNodesOutOf());
if (dests.count > 0) {
var dest = dests.elt(Math.floor(Math.random() * dests.count));
return dest.data.key;
}
var arr = myDiagram.model.nodeDataArray;
// choose a random next data object that is not a token and is not the current Node
var data = null;
while (data = arr[Math.floor(Math.random() * arr.length)],
data.category === "token" || data === node.data) { }
return data.key;
}
</script>
</head>
<body onload="init()">
<div id="sample">
<div id="myDiagramDiv" style="background-color: whitesmoke; border: solid 1px black; width: 100%; height: 700px"></div>
<p>
This sample is copied from the <a href="conceptMap.html">Concept Map</a> sample and
augmented with tokens that traverse the graph, stopping at nodes and travelling along links.
</p>
<p>
Note that the creation and movement of the tokens is <i>not</i> recorded by the <a>UndoManager</a>.
</p>
</div>
</body>
</html>