x and y. Buffer coordinates are coordinates for
the entire buffer, not just the currently-displayed portion.
If you have coordinates from an event, you have to convert
those to buffer coordinates with
gtkTextViewWindowToBufferCoords.gtkTextViewGetIterAtPosition(object, x, y)objectxyiterGtkTextIter. [ out ]trailingNULL, location to store an integer indicating where
in the grapheme the user clicked. It will either be
zero, or the number of characters in the grapheme.
0 represents the trailing edge of the grapheme. [ out ][ allow-none ]gtkTextViewGetIterAtLocation,
which returns cursor locations, i.e. positions between
characters.
Since 2.6