C&T p.319 lastLineRange/1, if anybody wants it .....

[Michael Turner]

Thanks, Angel, but Text is, in this case a wxTextCtrl, not a string.

I went with the following, which seems to be doing the trick so far:

lastLineRange(T) ->
 { wxTextCtrl:xYToPosition(T,0,wxTextCtrl:getNumberOfLines(T)-1),
   wxTextCtrl:getLastPosition (T) }

-michael turner


On 3/10/2010, "Angel" <clist@REDACTED> wrote:

>On Martes, 9 de Marzo de 2010 14:53:23 Michael Turner escribi坦:
>> 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
>> 
>> 
>> 
>> ________________________________________________________________
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>> 
>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
> 
>
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