STC goes blank on AddText() after 5k chars

I'm having a hard time tracking this one down. I'm writing
text, a  
sentence at a time, to a StyledTextControl, always at the
end. It  
works fine until . . . well, until what? When I add
"one too many  
sentences" the STC goes entirely blank. Adding more
after that  
doesn't make a difference. The data are still there,
according to my  
debugger.

"One too many sentences" *almost* means
"whatever sentence comes  
after the one that pushes the output beyond 5100 chars in
length" but  
not quite; sometimes it can get up to 5140 chars. But it's
a pretty  
narrow range in any case.

Has anybody else seen this? Has anybody got a suggestion
about where  
to look? My own code around the STC.AddText() call looks OK
. . .

This is on Mac OS 10.4.5 (happens to be Intel), with Python
2.4.1  
(MacPython PPC) and wxPython 2.6.2.1.

Charles Hartman


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Charles Hartman <charles.hartmanconncoll.edu> wrote:
> 
> I'm having a hard time tracking this one down. I'm
writing text, a  
> sentence at a time, to a StyledTextControl, always at
the end. It  
> works fine until . . . well, until what? When I add
"one too many  
> sentences" the STC goes entirely blank. Adding
more after that  
> doesn't make a difference. The data are still there,
according to my  
> debugger.
> 
> "One too many sentences" *almost* means
"whatever sentence comes  
> after the one that pushes the output beyond 5100 chars
in length" but  
> not quite; sometimes it can get up to 5140 chars. But
it's a pretty  
> narrow range in any case.
> 
> Has anybody else seen this? Has anybody got a
suggestion about where  
> to look? My own code around the STC.AddText() call
looks OK . . .

Is the text you are adding all on one line?  Are there any
CR/LF
characters in the added text?  Are you using the ansi or
unicode version
of wxPython?


> This is on Mac OS 10.4.5 (happens to be Intel), with
Python 2.4.1  
> (MacPython PPC) and wxPython 2.6.2.1.

You are running MacPython PPC on an Intel OSX 10.4.5?  Are
you sure?

 - Josiah


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On Feb 28, 2006, at 4:29 PM, Josiah Carlson wrote:

>
> Charles Hartman <charles.hartmanconncoll.edu> wrote:
>>
>> I'm having a hard time tracking this one down.
I'm writing text, a
>> sentence at a time, to a StyledTextControl, always
at the end. It
>> works fine until . . . well, until what? When I add
"one too many
>> sentences" the STC goes entirely blank.
Adding more after that
>> doesn't make a difference. The data are still
there, according to my
>> debugger.
>>
>> "One too many sentences" *almost* means
"whatever sentence comes
>> after the one that pushes the output beyond 5100
chars in length" but
>> not quite; sometimes it can get up to 5140 chars.
But it's a pretty
>> narrow range in any case.
>>
>> Has anybody else seen this? Has anybody got a
suggestion about where
>> to look? My own code around the STC.AddText() call
looks OK . . .
>
> Is the text you are adding all on one line?  Are there
any CR/LF
> characters in the added text?  Are you using the ansi
or unicode  
> version
> of wxPython?

No, no newline characters at all. Unicode version of
wxPython.

>> This is on Mac OS 10.4.5 (happens to be Intel),
with Python 2.4.1
>> (MacPython PPC) and wxPython 2.6.2.1.
>
> You are running MacPython PPC on an Intel OSX 10.4.5? 
Are you sure?

Very sure. When I got the Intel iMac (a few days ago) I
tried to use  
the ActiveState Python under the mistaken idea that it was a
 
Universal buiild, but it's i386-only, and since there's no
matching  
version (in binary installer) of wxPython, I went back to
the PPC  
MacPython. (The Universal version of MacPython is just
coming into  
existence now; I haven't tried the test installer yet.) So
the PPC  
versions of Python and wxPython are working perfectly
happily together.

Except for this. But I don't think this problem is related.
I'll try  
to test on a PPC G4 machine for another datapoint.

Charles Hartman


>  - Josiah
>


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Charles Hartman wrote:
> Except for this. But I don't think this problem is
related. I'll try to 
> test on a PPC G4 machine for another datapoint.

If you could post a small test that we could run, perhaps a
common 
thread will show itself?

-- 
Paul



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