x, y), relative to bin_window coordinates.
In contrast to gtkIconViewGetPathAtPos, this function also
obtains the cell at the specified position.
See gtkIconViewConvertWidgetToBinWindowCoords for converting
widget coordinates to bin_window coordinates.gtkIconViewGetItemAtPos(object, x, y)objectGtkIconView.xyTRUE if an item exists at the specified positionpathNULL. [ allow-none ]cellx, y), or NULL