Looks for a match between the supported targets of @context and the
@dest_target_list, returning the first matching target, otherwise
returning %GDK_NONE. @dest_target_list should usually be the return
value from gtk_drag_dest_get_target_list(), but some widgets may
have different valid targets for different parts of the widget; in
that case, they will have to implement a drag_motion handler that
passes the correct target list to this function.
Looks for a match between the supported targets of @context and the @dest_target_list, returning the first matching target, otherwise returning %GDK_NONE. @dest_target_list should usually be the return value from gtk_drag_dest_get_target_list(), but some widgets may have different valid targets for different parts of the widget; in that case, they will have to implement a drag_motion handler that passes the correct target list to this function.