dojox
Version:
Dojo eXtensions, a rollup of many useful sub-projects and varying states of maturity – from very stable and robust, to alpha and experimental. See individual projects contain README files for details.
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HTML
<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office">
<head>
<title>dojox.gfx: 100 draggable circles</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">
@import "../../../dojo/resources/dojo.css";
@import "../../../dijit/tests/css/dijitTests.css";
</style>
<script type="text/javascript" src="../../../dojo/dojo.js"></script>
<script type="text/javascript">
dojo.require("dojox.gfx");
dojo.require("dojox.gfx.move");
var container = null,
surface = null,
surface_size = null;
function getRand(from, to){
return Math.random() * (to - from) + from;
}
var skew_stat_factor = 15;
function getRandSkewed(from, to){
// let skew stats to smaller values
var seed = 0;
for(var i = 0; i < skew_stat_factor; ++i){
seed += Math.random();
}
seed = 2 * Math.abs(seed / skew_stat_factor - 0.5);
return seed * (to - from) + from;
}
function randColor(alpha){
var red = Math.floor(getRand(0, 255)),
green = Math.floor(getRand(0, 255)),
blue = Math.floor(getRand(0, 255)),
opacity = alpha ? getRand(0.1, 1) : 1;
return [red, green, blue, opacity];
}
function makeCircleGrid(itemCount){
var minR = 10, maxR = surface_size.width / 3;
for(var j = 0; j < itemCount; ++j){
var r = getRandSkewed(minR, maxR),
cx = getRand(r, surface_size.width - r),
cy = getRand(r, surface_size.height - r),
shape = surface.createCircle({cx: cx, cy: cy, r: r})
.setFill(randColor(true))
.setStroke({color: randColor(true), width: getRand(0, 3)})
;
new dojox.gfx.Moveable(shape);
}
}
function initGfx(){
container = dojo.byId("gfx_holder");
surface = dojox.gfx.createSurface(container, 500, 500);
surface_size = {width: 500, height: 500};
makeCircleGrid(100);
// cancel text selection and text dragging
dojo.connect(container, "ondragstart", dojo, "stopEvent");
dojo.connect(container, "onselectstart", dojo, "stopEvent");
}
dojo.addOnLoad(initGfx);
</script>
<style type="text/css">
.movable { cursor: pointer; }
</style>
</head>
<body>
<h1>dojox.gfx: 100 draggable circles</h1>
<p>Warning: Canvas renderer doesn't implement event handling.</p>
<div id="gfx_holder" style="width: 500px; height: 500px;"></div>
</body>
</html>