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demo.html
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<!DOCTYPE html>
<html>
<head>
<title>OpenSeadragon Fabricjs Overlay Demo</title>
<script src="openseadragon/openseadragon.js"></script>
<script src="openseadragon-fabricjs-overlay.js"></script>
<script src="//code.jquery.com/jquery-1.11.2.min.js"></script>
<script src="fabric/fabric.adapted.js"></script>
<style type="text/css">
html,
body,
.openseadragon1 {
width: 100%;
height: 100%;
margin: 0;
}
</style>
<script>
// ----------
App = {
// ----------
init: function() {
var self = this;
var tileSource = {
Image: {
xmlns: "http://schemas.microsoft.com/deepzoom/2008",
Url: "http://openseadragon.github.io/example-images/highsmith/highsmith_files/",
Format: "jpg",
Overlap: "2",
TileSize: "256",
Size: {
Height: "9221",
Width: "7026"
}
}
};
this.viewer = OpenSeadragon({
id: "contentDiv",
prefixUrl: "openseadragon/images/",
tileSources: [{
tileSource: tileSource,
width: 2,
y: 0,
x: 0
}]
});
// initialize overlay
var overlay = this.viewer.fabricjsOverlay();
// add fabric rectangle
var rect = new fabric.Rect({
left: 0,
top: 0,
fill: 'red',
width: 1000,
height: 1000
});
overlay.fabricCanvas().add(rect);
// add fabric circle
var circle = new fabric.Circle({
left: 6000,
top: 300,
fill: 'green',
radius: 300,
selectable: true,
action: 'gravity'
});
overlay.fabricCanvas().add(circle);
// create circle falling animation
circle.animate('top', '+=8400', {
onChange: overlay.fabricCanvas().renderAll.bind(overlay.fabricCanvas()),
duration: 2000,
easing: fabric.util.ease.easeOutBounce
});
circle.animate('scaleY', '-=.1', {
onChange: overlay.fabricCanvas().renderAll.bind(overlay.fabricCanvas()),
duration: 1000,
});
// animate circle on mouse release (try to drag circle up)
overlay.fabricCanvas().on('mouse:up', function (options) {
if (options.target&&(options.target.action=='gravity')) {
delta=9300-2*(options.target.radius*options.target.scaleY)-options.target.top;
if (delta>0) {
circle.animate('top', '+='+delta, {
onChange: overlay.fabricCanvas().renderAll.bind(overlay.fabricCanvas()),
duration: 2000,
easing: fabric.util.ease.easeOutBounce
});
circle.animate('scaleY', '-=.1', {
onChange: overlay.fabricCanvas().renderAll.bind(overlay.fabricCanvas()),
duration: 1000,
});
}
}
})
// add fabric circle with text
var circle2 = new fabric.Circle({
left: 3000,
top: 245,
fill: 'lightgray',
radius: 330,
selectable: false,
action: 'button'
});
overlay.fabricCanvas().add(circle2);
var text = new fabric.Text('Start\n drawing', {
left: 3070,
top: 410,
fontSize: 130,
fontFamily: 'Helvetica',
textAlign: 'center',
fill: 'black',
selectable: false,
action: 'button'
});
overlay.fabricCanvas().add(text);
overlay.fabricCanvas().freeDrawingBrush.color='red';
overlay.fabricCanvas().freeDrawingBrush.width=30;
// start freedrawing mode
overlay.fabricCanvas().on('mouse:down', function (options) {
if (options.target&&(options.target.action=='button')) {
self.viewer.setMouseNavEnabled(false);
self.viewer.outerTracker.setTracking(false);
circle2.set('fill','lightgreen');
overlay.fabricCanvas().isDrawingMode=true;
}
});
$(window).resize(function() {
overlay.resize();
overlay.resizecanvas();
});
}
};
// ----------
$(document).ready(function() {
App.init();
});
</script>
</head>
<body>
<div id="contentDiv" class="openseadragon1"></div>
</body>
</html>