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="Custom animation examples for GoJS."/>
<link rel="stylesheet" href="../assets/css/style.css"/>
<!-- Copyright 1998-2023 by Northwoods Software Corporation. -->
<title>Custom Animation Demo</title>
</head>
<body>
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<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">
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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">
<style>
.flex-container {
display: flex;
flex-wrap: nowrap;
flex-direction: column;
}
.flex-container>div {
margin-bottom: 10px;
}
</style>
<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; // for conciseness in defining templates
myDiagram = new go.Diagram("myDiagramDiv", // create a Diagram for the DIV HTML element
{
"clickCreatingTool.archetypeNodeData": {
color: "palegreen",
key: "node"
},
"undoManager.isEnabled": true,
"animationManager.isInitial": false, // To use custom initial animation instead
"InitialLayoutCompleted": animateFadeIn // animate with this function
});
function animateFadeIn(e) {
var diagram = e.diagram;
var animation = new go.Animation();
animation.isViewportUnconstrained = true;
animation.easing = go.Animation.EaseOutExpo; // Looks better for a fade in animation
animation.duration = 900;
animation.add(diagram, 'position', diagram.position.copy().offset(0, diagram instanceof go.Palette ? 200 : -200), diagram.position);
animation.add(diagram, 'opacity', 0, 1);
animation.start();
}
var addNodeAdornment =
$(go.Adornment, "Spot",
$(go.Panel, "Auto",
$(go.Shape, { fill: null, stroke: "dodgerblue", strokeWidth: 3 }),
$(go.Placeholder)),
// the button to create a "next" node, at the top-right corner
$("Button",
{
alignment: go.Spot.TopRight,
click: addNode // this function is defined below
},
$(go.Shape, "PlusLine", { desiredSize: new go.Size(6, 6) })
)
);
myDiagram.nodeTemplate =
$(go.Node, "Auto",
{
selectionAdornmentTemplate: addNodeAdornment,
locationSpot: go.Spot.Center
},
new go.Binding("location", "loc").makeTwoWay(),
$(go.Shape, "RoundedRectangle", {
strokeWidth: 2,
portId: "", // this Shape is the Node's port, not the whole Node
fromLinkable: true, fromLinkableSelfNode: true, fromLinkableDuplicates: true,
toLinkable: true, toLinkableSelfNode: true, toLinkableDuplicates: true,
cursor: "pointer"
},
new go.Binding("fill", "color")),
$(go.TextBlock,
{ margin: 10, font: '14px sans-serif' },
new go.Binding("text", "key"))
);
myDiagram.model = new go.GraphLinksModel(
[
{ key: "Alpha", loc: new go.Point(0, 0), color: "lightblue" },
{ key: "Beta", loc: new go.Point(150, 0), color: "orange" },
{ key: "Gamma", loc: new go.Point(0, 150), color: "lightgreen" },
{ key: "Delta", loc: new go.Point(150, 150), color: "pink" }
],
[
// No links to start
]);
// This animation can be used in LinkDrawn Diagram listeners to animate
// from a straight temporary link to a Bezier finished link
// Custom animation for the curviness of a bezier link
go.AnimationManager.defineAnimationEffect('curviness',
(obj, startValue, endValue, easing, currentTime, duration, animationState) => {
if (isNaN(startValue)) startValue = 0;
if (isNaN(endValue)) endValue = 20;
obj.curviness = easing(currentTime, startValue, endValue - startValue, duration);
}
);
// This animation can be used in LinkDrawn Diagram listeners to animate
// from a straight temporary link to an Orthogonal finished link
go.AnimationManager.defineAnimationEffect('orthogonalLinkanim',
(link, initPoints, tempPoints, easing, currentTime, duration, animation) => {
var animationState = animation.getTemporaryState(link);
if (animationState.initial === undefined) {
// On the first animaiton tick, save the initial points
animationState.initial = true;
var pts = link.points.copy();
tempPoints.points = pts;
animationState.startPt = pts.first();
animationState.toPt1 = pts.elt(2);
animationState.toPt2 = pts.elt(3);
animationState.endPt = pts.last();
}
var newpt1 = new go.Point(
easing(currentTime, animationState.startPt.x, animationState.toPt1.x - animationState.startPt.x, duration),
easing(currentTime, animationState.startPt.y, animationState.toPt1.y - animationState.startPt.y, duration));
var newpt2 = new go.Point(
easing(currentTime, animationState.endPt.x, -(animationState.endPt.x - animationState.toPt2.x), duration),
easing(currentTime, animationState.endPt.y, -(animationState.endPt.y - animationState.toPt2.y), duration));
// Setting the array of points will automatically call makeGeometry which will redraw the segments of the line
link.points = [animationState.startPt, tempPoints.points.elt(1),
newpt1, newpt2,
tempPoints.points.elt(4), animationState.endPt];
}
);
go.AnimationManager.defineAnimationEffect('corner',
(obj, startValue, endValue, easing, currentTime, duration, animation) => {
// If no corner set, default to 0 -> 20
startValue = startValue || 0;
endValue = endValue || 20;
obj.corner = easing(currentTime, startValue, endValue - startValue, duration);
}
);
myDiagram.addDiagramListener('LinkDrawn', e => {
var link = e.subject;
var animation = new go.Animation();
var linkChoice = document.getElementById("links").value
if (linkChoice == "bezier") {
link.curve = go.Link.Bezier;
animation.easing = elasticEase;
animation.add(link, "curviness", 0, link.curviness);
animation.duration = 500;
} else if (linkChoice == "orthogonal") {
// The orthogonal animation is two animations, chained together. One to modify the points,
// and then another to modify the link.corner value.
// Store the initial link.corner value,
// then set it to 0 so that in between animations it does not revert back to the original state
var initCorner = link.corner;
link.corner = 0;
// Store the original points to this object
var tempPoints = {};
animation.add(link, "orthogonalLinkanim", link.points, tempPoints);
animation.duration = 300;
// Chain animation after first one is completed
animation.finished = () => {
// Set points back to what they were before the animation
myDiagram.startTransaction("Fix Points");
link.points = tempPoints.points;
myDiagram.commitTransaction("Fix Points");
// Need to make a new animation object
var animation2 = new go.Animation()
animation2.add(link, "corner", 0, initCorner);
animation2.duration = 250;
animation2.start();
}
animation.start();
link.routing = go.Link.Orthogonal;
// NYI ortho animation
link.ensureBounds();
}
animation.start();
});
go.AnimationManager.defineAnimationEffect('bounceDelete',
(obj, startValue, endValue, easing, currentTime, duration, animation) => {
var animationState = animation.getTemporaryState(obj);
if (animationState.initial === undefined) {
// Set the initial positions as part of the animationState data
animationState.yPos = obj.location.y;
animationState.xPos = obj.location.x;
animationState.yVelo = 0;
animationState.xVelo = 0;
animationState.newTime = 0;
animationState.oldTime = 0;
animationState.initial = true;
}
obj.location = getPointBounceDelete(currentTime, obj, animationState, obj.diagram);
}
);
// Get the point the object should be at based upon the time and original point
function getPointBounceDelete(currentTime, obj, animationState, diagram) {
if (diagram === null) return new go.Point(animationState.xPos, animationState.yPos);
let height = obj.actualBounds.height;
animationState.newTime = currentTime;
// Animation uses a change in time in order to be more consistant
let delTime = (animationState.newTime - animationState.oldTime) / 3;
animationState.yVelo += .05 * delTime;
// Add a slight easing to the x movement at the beginning of the animation
if (currentTime < 200) {
animationState.xVelo = currentTime / 300;
}
// Adjust positions based on the velocities and the change in time
animationState.yPos += animationState.yVelo * delTime;
animationState.xPos += animationState.xVelo * delTime;
// Check to see if the Y position will be less than the bottom of the diagram, if so,
// change the direction and scale down the velocity and set the position to the bottom of the diagram
if (animationState.yPos > diagram.viewportBounds.height / 2 - height) {
animationState.yVelo = -.75 * animationState.yVelo;
animationState.yPos = diagram.viewportBounds.height / 2 - height;
}
let myPoint = new go.Point(animationState.xPos, animationState.yPos)
// Get the new old time for use in the next iteration
animationState.oldTime = animationState.newTime;
return myPoint;
}
myDiagram.addDiagramListener('SelectionDeleting', e => {
var deletionSelection = document.getElementById('deletion');
var animation = new go.Animation();
var diagram = e.diagram;
e.subject.each(p => {
// Because we are deleting this part, we cannot animate it, instead we must animate a temporary copy
// The animation handles this via addTemporaryPart, which must be passed a copy
var part = p.copy();
animation.addTemporaryPart(part, diagram);
var initPosition = part.position.copy()
part.locationSpot = go.Spot.Center;
part.position = initPosition;
switch (deletionSelection.value) {
case "spinOut":
animation.add(part, "angle", part.angle, part.angle + 1000);
animation.add(part, "scale", part.scale, 0.01);
break;
case "fadeOut":
animation.add(part, "opacity", part.opacity, 0);
break;
case "zoomOut":
animation.add(part, "scale", part.scale, 0.01);
break;
case "floatOut":
animation.add(part, "opacity", part.opacity, 0);
animation.add(part, "position", part.position, part.position.copy().add(new go.Point(0, -80)));
break;
case "bounceOut":
animation.add(part, "bounceDelete", part.location); // does't need an end value, bounceDelete determines one
animation.add(part, "scale", part.scale, 0.01);
animation.duration = 1500;
animation.isViewportUnconstrained = true;
break;
default:
// nothing animates
break;
}
});
animation.start();
});
myDiagram.addDiagramListener('ClipboardPasted', e => {
var creationSelection = document.getElementById('creation');
// For best performance, be sure to use only one Animation for the entire selection
// instead of creating one animation for each object in the selection
var animation = new go.Animation();
e.subject.each(part => {
addCreatedPart(part, animation, creationSelection.value)
});
animation.start();
});
myDiagram.addDiagramListener('PartCreated', e => { // From ClickCreatingTool
var creationSelection = document.getElementById('creation');
var animation = new go.Animation();
addCreatedPart(e.subject, animation, creationSelection.value)
animation.start();
});
function addCreatedPart(part, animation, creationSelection) {
switch (creationSelection) {
case "spinIn":
animation.add(part, "angle", part.angle + 1000, part.angle);
animation.add(part, "scale", 0.01, part.scale);
break;
case "fadeIn":
animation.add(part, "opacity", 0, part.opacity);
break;
case "zoomIn":
animation.add(part, "scale", 0.01, part.scale);
break;
case "floatIn":
animation.add(part, "opacity", 0, part.opacity);
animation.add(part, "location", part.location.copy().add(new go.Point(0, -80)), part.location);
break;
default:
// nothing animates
break;
}
}
document.getElementById('addNode').addEventListener('click', e => addNode());
function addNode() {
var diagram = myDiagram;
var tempNodes = new go.List();
diagram.startTransaction("Add States");
diagram.nodes.each(node => {
if (node.isSelected) {
tempNodes.push(node);
}
})
var animation = new go.Animation();
// Set the easing to a custom easing function
animation.easing = elasticEase;
// Add a new node to the right of each node
tempNodes.each(part => {
// get the node data for which the user clicked the button
var fromNode = part;
var fromData = part.data;
// create a new "State" data object, positioned off to the right of the adorned Node
var toData = { key: "new" };
toData.color = "purple";
var p = fromNode.location.copy();
// Place the new node randomly somewhere along a circular 200px radius
var angle = Math.random() * Math.PI * 2;
p.x += Math.cos(angle) * 200;
p.y += Math.sin(angle) * 200;
toData.loc = p;
// add the new node data to the model
var model = diagram.model;
model.addNodeData(toData);
// create a link data from the old node data to the new node data
var linkdata = {
from: model.getKeyForNodeData(fromData), // or just: fromData.key
to: model.getKeyForNodeData(toData),
};
// and add the link data to the model
model.addLinkData(linkdata);
var newnode = diagram.findNodeForData(toData);
// Animate each newly created node
animation.add(newnode, "position", part.location, newnode.location);
});
animation.start();
diagram.commitTransaction("Add States");
};
document.getElementById('reloadModel').addEventListener('click', e => {
myDiagram.model = go.Model.fromJson(myDiagram.model.toJson())
});
// Custom easing function used in some animations
function elasticEase(currentTime, startValue, byValue, duration) {
var ts = (currentTime /= duration) * currentTime;
var tc = ts * currentTime;
return startValue + byValue * (56 * tc * ts + -175 * ts * ts + 200 * tc + -100 * ts + 20 * currentTime);
}
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width: 700px; height: 600px;"></div>
<div class="flex-container" style="width:700px">
<p style="margin-bottom: 0;">
This extension implements several custom animations within GoJS. It may be useful to copy some of them into your own project.
</p>
<ul>
<li>Double click in the Diagram background to create a node, or copy and paste nodes, to view creation animations.
<li>Delete a node to view deletion animations.
<li>Draw links to see new link creation animations.
<li>Select a node and press the + button or the button below to see a link-and-node creation animation.
<li>Reload the model using the button below to see the custom load animation
</ul>
</div>
<div class="flex-container">
<p><strong>Options:</strong></p>
<div>
Creation Animation
<select id="creation">
<option value="spinIn">Spin In</option>
<option value="fadeIn">Fade In</option>
<option value="floatIn">Float In</option>
<option value="zoomIn">Zoom In</option>
<option>--None--</option>
</select>
</div>
<div>
Deletion Animation
<select id="deletion">
<option value="spinOut">Spin Out</option>
<option value="fadeOut">Fade Out</option>
<option value="floatOut">Float Out</option>
<option value="zoomOut">Zoom Out</option>
<option value="bounceOut">Bounce Out</option>
<option>--None--</option>
</select>
</div>
<div>
Drawn Link Style
<select id="links">
<option value="bezier">Bezier Curve</option>
<option value="orthogonal">Orthogonal Curve</option>
<option>Linear (no animation)</option>
</select>
</div>
</div>
<button id="addNode">Add Node + Link from selected Node</button>
<button id="reloadModel">Reload model</button>
</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>