Drop event in Grids

Is it possible to catch native "drop" event on TileGrid or ListGrid ?
So can we use GWT HasAllDragAndDropHandlers on TileGrid or ListGrid to listen for drop events where drop item is not SmartGwt element ?

For example can we catch the drop event when a file is droped from file system into the browser window (TileGrid) ?

Basicaly it is very easy to achieve if using non SmartGWT widgets for example Label widget.

Label.addDropHandler ();