drag-begin
The drag-begin signal is emitted on the drag source when a drag is started. A typical reason to connect to this signal is to set up a custom drag icon with drag_source_set_icon() .
Callback function
The drag-begin signal is emitted on the drag source when a drag is started. A typical reason to connect to this signal is to set up a custom drag icon with drag_source_set_icon() .
Callback function