Fabric.js - Rotate all object on canvas

https://groups.google.com/forum/#!topic/fabricjs/Wv5aUNju3hQ%5B1-25-false%5D

HTML

<script src="https://raw.github.com/kangax/fabric.js/feature/dynamic_origin/dist/all.min.js"></script>
<div>
    <canvas id="c" width="400" height="400"></canvas>
    <div id="d">
        <canvas id="c2" width="200" height="200"></canvas>
        <br/>
        <input id="objectWidth" type="text" />
        <br/>
        <input id="objectHeight" type="text" />
        <br/>
    <div>
</div>

CSS

canvas {
    border-width: 1px;
    border-style: solid;
    border-color: #000;
}
#d {
    width: 200px,
    height: 300px,
    background-color: "#CCC",
    position: absolute;
    display: none;
    z-index: 2000;
}

JavaScript

// add a custom function to fabric.StaticCanvas,
// so fabric.Canvas also will have this function
fabric.StaticCanvas.prototype.getAbsoluteCoords = function(object) {
    return {
        left: object.left + this._offset.left,
        top: object.top + this._offset.top
    };
};

var srcImg = "http://fabricjs.com/article_assets/3_4.png";
var lastTime = 0;

// canvas
var canvas = new fabric.Canvas('c');
canvas.backgroundColor = "#F5F5F5";

// canvas 2 - "modal"
var canvas2 = new fabric.Canvas('c2');
canvas2.backgroundColor = "#F5F5F5";

// rectangle
var rect = new fabric.Rect({
    left: 50,
    top: 50,
    width: 50,
    height: 50,
    fill: "#dd0000"
});
rect.set("hasRotatingPoint", true);
canvas.add(rect);

// text
var text = new fabric.Text('Text', {
    left: 110,
    top: 110
});
text.set("hasRotatingPoint", true);
canvas.add(text);

// image
fabric.util.loadImage(srcImg, function (img) {
    var object = new fabric.Image(img);
    object.set({
        left: 200,
        top: 200
    });
    object.set("hasRotatingPoint", true);
    object.set("scaleX", 0.25);
    object.set("scaleY", 0.25);
    canvas.add(object);
    canvas.renderAll();
});

canvas.renderAll();

/////////////////
canvas.observe("object:selected", objectSelectedHandler);

function objectSelectedHandler(event) {
    $('#d').hide();
    
    var date = new Date();
    var now = date.getTime();
    if (now - lastTime < 500) {
        objectDoubleClickHandler(event.target);
    }
    lastTime = now;
}

function objectDoubleClickHandler(object) {
    // do something

    openEdition(object);
}

function openEdition(object) {
    canvas2.clear();
    var clonedObject = fabric.util.object.clone(object);
    canvas2.add(clonedObject);
    canvas2.deactivateAll();
    clonedObject.center();
    canvas2.renderAll();
    
    // get some properties of select object
    $("#objectWidth").val(object.get("width"));
    $("#objectHeight").val(object.get("height"));
    
    //
    // TODO put the float...