Is it possible to cancel a draggable in "drag:" callback?

Is it possible to cancel a draggable in "drag:" callback?

Hi all!

I want to cancel a draggable in one of its callback functions ("drag:" in this case). Is this possible?

After reading this ticket: http://dev.jqueryui.com/ticket/4145 i tried this code:

$("#switch a").draggable({ axis: 'x',
        drag: function(e, ui){
            console.log(ui.position.left);
            if(ui.position.left>0){
                return false;
            }
        }
});

But that's not working. Any ideas?

thanks a lot in advance!