I've implemented a simple jQuery UI draggable:-
$(".widget").draggable({
handle: ".widget-header",
grid: [ 20, 20 ]
});
The draggable item is simply a div with a header class that I'm using as a handle (like a dialog).
What I'm trying to do is get it so that as I drag the item along, a faint dotted or dashed box can appear behind the div to show where it will be dropped on the grid'. I've looked to see if there is anything available under 'droppable' but I'm coming unstuck.