[erlang-questions] Cesarini/Thompson wxErlang chapter - how to write lastLineRange?
Angel
clist@REDACTED
Wed Mar 10 02:20:33 CET 2010
On Martes, 9 de Marzo de 2010 14:53:23 Michael Turner escribió:
> I'm trying to work through the wx example in Cesarini & Thompson
> (chapter "GUI programming with wxErlang". On p.319 there are two
> calls to a function lastLineRange on a wx TextCtrl. The authors don't
> supply this function, and I can't see any corresponding C++ member
> function in the wxTextCtrl API here
>
> http://docs.wxwidgets.org/trunk/classwx_text_ctrl.html
>
> It's looking like I have to write lastLineRange myself, to finish
> working through this chapter. Unless ... someone else has already run
> into this roadblock, got around it, and can map out the detour for me?
> I'm sure I'll kludge something up, but it would be nice to do this one
> more or less by the book, if possible.
>
> -michael turner
>
>
>
> ________________________________________________________________
> erlang-questions (at) erlang.org mailing list.
> See http://www.erlang.org/faq.html
> To unsubscribe; mailto:erlang-questions-unsubscribe@REDACTED
>
lastLineRange seems to be a local function, not a wxwidgets one, maybe they
didnt want to use undo facilities for the text control... (too complicated for
a example)
a quick fix (not tested) for this can be:
LastLineRange(Text) ->
ListOfLines=string:tokens(Text,[[10]]), %% Tokenize buffer on newlines
LastLine=lists:last(ListOfLines), %% find the last line
StarPos= wxTextCtrl:getlastposition() - length(LastLine),
EndPos = wxTextCtrl:getlastposition,
{StarPos,EndPos}
Maybe it just works, YMMV
/angel
Most people know C is not so high level....
...Everybody else just got assembler overdose
More information about the erlang-questions
mailing list