the new owner of the selection, or %NULL if there is none
the reason for the ownership change as a #GdkOwnerChange value
the atom identifying the selection
the time at which the selection ownership was taken over
%TRUE if the event was sent explicitly.
the timestamp of the event
the type of the event (%GDK_OWNER_CHANGE).
the window which received the event
Generated when the owner of a selection changes. On X11, this information is only available if the X server supports the XFIXES extension.