the property in which to place the result of the conversion.
the window on which to place @property or null if none.
the selection.
true if the event was sent explicitly.
the target to which the selection should be converted.
the time of the event in milliseconds.
the type of the event (gdk.types.EventType.SelectionClear, gdk.types.EventType.SelectionNotify or gdk.types.EventType.SelectionRequest).
the window which received the event.
Generated when a selection is requested or ownership of a selection is taken over by another client application.