Detect if Mouse is over an object inside canvas

[raphamorim]

Reference: http://jsfiddle.net/m1erickson/Cw4ZN/

[raphamorim]

origami('#canvas')
.rect(300,30,40,{
   background: 'blue',
   hover: function(item, canvas){
         // item: current shape
         // canvas: current origami context
         item.background = 'red';
    }
})
.draw();

[AimForNaN]

Is this feature available somewhere that I can pull from?