Starts a drag and creates a new drag context for it. This function is called by the drag source.
the source window for this drag
the device that controls this drag
the offered targets, as list of GdkAtoms. [transfer none][element-type GdkAtom]
a newly created GdkDragContext. [transfer full]
See Implementation
Starts a drag and creates a new drag context for it. This function is called by the drag source.