- For wxGTK using GTK+ 1.2.x and earlier, the number of lines in a
- multi-line text control is calculated by actually counting newline
- characters in the buffer, i.e. this function returns the number of
- logical lines and doesn't depend on whether any of them are wrapped.
- For all the other platforms, the number of physical lines in the
- control is returned.
- Also note that you may wish to avoid using functions that work with
- line numbers if you are working with controls that contain large
- amounts of text as this function has O(N) complexity for N being
- the number of lines.