[Kde-perl] Perl-Qt4?

[Agbaria, Rasheed]

Hi,
Regarding memory leakage, I am not sure ?
Even though this is the best WA I found until new version is
released(looks like no one is working on it :( ).
Please look at the folloing link :

http://sourceforge.net/tracker/index.php?func=detail&aid=924345&group_id
=29255&atid=395685

-----Original Message-----
From: Ole Christensen [mailto:Ole.Christensen at web.de] 
Sent: Wednesday, May 31, 2006 6:06 PM
To: kde-perl at kde.org
Subject: Re: [Kde-perl] Perl-Qt4?

Rasheed,

doesn't that lead to a memory leakage? And does it work in each case
(when 
removing cells)? I doubt.

Cheers,
Ole.


Agbaria, Rasheed wrote:
> There is already reported WA,
> 
> Define your own table :
> 
> package MyTable;
> use strict;
> use Qt;
> use Qt::isa qw(Qt::Table);
> 
> sub NEW {
>     shift->SUPER::NEW(@_);
> }
> 
> sub Qt::Table::takeItem {
> }
> 
> 1;
> 
> 
> ===============================
> Inside your code use MyTable instead of table:
> package main;
> use MyTable;
> use strict;
> use Qt;
> 
> my $a = Qt::Application(\@ARGV);
> 
> my $table = MyTable();
> $table->setNumRows( int(1) );
> $table->setNumCols( int(1) );
> $table->setText(0,0,'Hello');
> 
> $a->setMainWidget($table);
> $table->show;
> # Uncomment out either of the next to lines to reproduce the problem
> $table->setNumRows(0);
> #$table->removeRow(0);
> 
> exit $a->exec;
> 
> 
> this code worked fine.
> 
> 
> -----Original Message-----
> From: Joe Claborn [mailto:joe at claborn.net] 
> Sent: Wednesday, May 31, 2006 4:24 PM
> To: kde-perl at kde.org
> Subject: Re: [Kde-perl] Perl-Qt4?
> 
> Ole,
> Thanks for the reply. I think the problem is more fundamental than
your 
> solution suggests. Here is the code that crashes.
> 
> use strict;
> use Qt;
> 
> my $a = Qt::Application(\@ARGV);
> 
> my $table = Qt::Table();
> $table->setNumRows( int(1) );
> $table->setNumCols( int(1) );
> $table->setText(0,0,'Hello');
> 
> $a->setMainWidget($table);
> $table->show;
> # Uncomment out either of the next to lines to reproduce the problem
> $table->setNumRows(0);
> #$table->removeRow(0);
> 
> exit $a->exec;
> 
> gives
> *** glibc detected *** double free or corruption (fasttop): 0x085b1c10
> ***
> Aborted
> 
> So if I can not add text to a table and then reduce the size of the
> table, I'm 
> not show that it is usable.
> 
> Thanks again,
> 
> Joe
> 
> 
> 
> On Wednesday 31 May 2006 12:27 am, Ole Christensen wrote:
>> Joe,
>>
>> sorry for responding late.
>>
>> Your problem can probably be solved by holding references to all
table
>> items in a "shadow table". I once used that approach for some other
> issue
>> with table items. Works without any problem for me. Sorry, I am in a
> hurry.
>> So, very brief:
>>
>> Put a copy (the reference) of each item you create in the Qt table
> into a
>> raw Perl table (array of refs to arrays). When you have deleted the
> item,
>> you can finally remove the item's copy.
>>
>> Let me know, if this is too short to understand.
>>
>> Cheers,
>> Ole.
>>
>> Joe Claborn wrote:
>>> On Tuesday 30 May 2006 4:30 pm,
>>>
>>>> You;re not getting the point, I've over 20,000 lines of code
> written in
>>>> Perl-Qt for PhoeNUX's GUI tools and DO NOT want to port to yet
> another
>>>> language. Please Ashley, say that there is a port planned :)
>>> We too have a substantial number of lines written in Perl-Qt.  And
> as we
>>> have not been able to solve the setNumRows(0) crashes, I'm looking
> at
>>> Ruby or C++. I like what I've read about Ruby, but I worried about
>>> getting into another situation where I'm not writting in the 'base'
>>> language of the tool. If we port to Ruby, and then in a couple of
> years
>>> Ruby-Qt fades away as it appears that Perl-Qt is, then I'm going to
> wish
>>> I'd ported to C++.
>>>
>>> Any ideas?  Is there a way to keep Perl-Qt alive?
> 
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