Used in GdkDragContext to indicate what the destination should do with the dropped data.
|2||Gdk::ACTION_COPY||Copy the data.|
|4||Gdk::ACTION_MOVE||Move the data, i.e. first copy it, then delete it from the source using the DELETE target of the X selection protocol.|
|8||Gdk::ACTION_LINK||Add a link to the data. Note that this is only useful if source and destination agree on what it means.|
|16||Gdk::ACTION_PRIVATE||Special action which tells the source that the destination will do something that the source doesn't understand.|
|32||Gdk::ACTION_ASK||Ask the user what to do with the data.|