gdk:drag-begin-from-point (window device targets x y)

window -- a gdk:window source window for this drag
device -- a gdk:device object that controls this drag
targets -- a list of strings for the offered targets
x -- an integer for the x coordinate where the drag nominally started
y -- an integer for the y coordinate where the drag nominally started

The newly created gdk:drag-context object.

Starts a drag and creates a new drag context for it. This function is called by the drag source.