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<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>
<!--
The next line should include Microsoft's Silverligth.js, if you plan to use the silverlight backend
<script type="text/javascript" src="Silverlight.js"></script>
-->
<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;
var container_position = null;
var surface = null;
var 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));
        var green = Math.floor(getRand(0, 255));
        var blue  = Math.floor(getRand(0, 255));
        var opacity = alpha ? getRand(0.1, 1) : 1;
        return [red, green, blue, opacity];
}

var gShapes = {}
var gShapeCounter = 0;

function makeCircleGrid(itemCount){
        var minR = 10, maxR = surface_size.width / 3;
        for(var j = 0; j < itemCount; ++j){
                var r = getRandSkewed(minR, maxR);
                var cx = getRand(r, surface_size.width  - r);
                var cy = getRand(r, surface_size.height - r);
                var 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");
        container_position = dojo.coords(container, true);
        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>