Signal
GtkDragSource::drag-begin
Description [src]
Emitted on the drag source when a drag is started.
It can be used to e.g. set a custom drag icon with
gtk_drag_source_set_icon().
| Default handler: | The default handler is called after the handlers added via  | 
Parameters
| drag | GdkDrag | 
| The  | |
| The data is owned by the caller of the function. |