[Qt-interest] QFile* threads

[_h_]

Hi Thiago Macieira,
Wouldn't it incure overhead?
Is there any other alternative? Or is there any way Qt allows to stop
the threads temporarily when the QFileDialog is hidden and start them
when QFileDialog shown again ???
I am not getting why threads are running when QFileDialog is hidden.
Thank you.

On Fri, Jul 24, 2009 at 5:21 PM, Thomas
Dähling<t.daehling at googlemail.com> wrote:
> I'd suggest caching the QFileDialog info somewhere and when reopening
> one of them you'd just initialize it to the corresponding cache
> values.
>
> 2009/7/24 _h_ <hiralsmaillist at gmail.com>:
>> Hi Thiago Macieira,
>> Thanks for information.
>> Can you please suggest how can I reduce these many threads?
>> My application uses more than 20 QFileDialog object pointers (why
>> pointer? because I want to persist the directoy/file filters/file
>> browsed info within that instance, so), and if I open and close all
>> these file broswers one by one, then I can see about 20 threads
>> running. So I wanted to reduce these many threads.
>> Can you please suggest nice way to achieve this?
>> Thank you.
>>
>>
>>
>> On Fri, Jul 24, 2009 at 4:50 PM, Thiago
>> Macieira<thiago.macieira at trolltech.com> wrote:
>>> Em Sexta-feira 24 Julho 2009, às 12:26:03, _h_ escreveu:
>>>> Hi,
>>>> In one of my qt application I am using multiple instance of
>>>> QFileDialog by taking object pointer.
>>>> When observing process stack of this application, it shows following...
>>>>
>>>> Thread 3 (Thread 183630768 (LWP 10648)):
>>>> #0 0x008e348d in pthread_cond_wait@@GLIBC_2.3.2 ()
>>>> #1 0x02a34178 in QWaitCondition::wait ()
>>>> #2 0x06bbbced in QFileSystemModel::sort ()
>>>> #3 0x02a335a0 in QThread::setPriority ()
>>>> #4 0x008e0d78 in start_thread () from /lib/tls/libpthread.so.0
>>>> #5 0x05e613fa in clone () from /lib/tls/libc.so.6
>>>> Thread 2 (Thread 173140912 (LWP 10649)):
>>>> #0 0x05e5a757 in ___newselect_nocancel () from /lib/tls/libc.so.6
>>>> #1 0x02b55bbf in QEventDispatcherUNIX::select ()
>>>> #2 0x02b56c50 in QEventDispatcherUNIXPrivate::doSelect ()
>>>> #3 0x02b57117 in QEventDispatcherUNIX::processEvents ()
>>>> #4 0x02b26b6d in QEventLoop::processEvents ()
>>>> #5 0x02b26eed in QEventLoop::exec ()
>>>> #6 0x02a30087 in QThread::exec ()
>>>> #7 0x02b0b91e in QFSFileEngine::rmdir ()
>>>> #8 0x02a335a0 in QThread::setPriority ()
>>>> #9 0x008e0d78 in start_thread () from /lib/tls/libpthread.so.0
>>>> #10 0x05e613fa in clone () from /lib/tls/libc.so.6
>>>>
>>>> Can you please let me know how can I stop these threads?
>>>
>>> Those threads are created by the QFileDialog -- more specifically, by
>>> QFileSystemModel. You can't stop them.
>>>
>>> --
>>> Thiago Macieira - thiago.macieira (AT) nokia.com
>>>  Senior Product Manager - Nokia, Qt Software
>>>     Sandakerveien 116, NO-0402 Oslo, Norway
>>>
>>> _______________________________________________
>>> Qt-interest mailing list
>>> Qt-interest at trolltech.com
>>> http://lists.trolltech.com/mailman/listinfo/qt-interest
>>
>> _______________________________________________
>> Qt-interest mailing list
>> Qt-interest at trolltech.com
>> http://lists.trolltech.com/mailman/listinfo/qt-interest