Hi,
On 31.08.2015 23:13, John Weeks wrote:
>> On Aug 31, 2015, at 12:49 PM, Igor Mironchik <igor.mironc...@gmail.com>
>> wrote:
>>
>> Pixmap is not null... Image was saved for the half and I read it... Pixmap
>> successfully loaded but draws only first part of the image while the next
>> one is grey...
> I forget how Linux works- can you try opening for write? On the systems I
> know, you can't open for write from two different processes. If you get an
> error for writing then the file is still being filled.
>
> Seems like I recall that Linux allows two processes write to file. There must
> be some way to open a file that excludes other processes, and that it would
> fail if already open elsewhere.
>
> (Horrible hack ahead) Or get the number of bytes in the file, wait a bit and
> get the number again. If it changes, it's still being filled.
Even if try to open file in ReadWrite mode it opens successfully...
I changed peace of code to
if( imgFile.open( QIODevice::ReadWrite ) )
{
if( !p.loadFromData( imgFile.readAll() ) )
qDebug() << "loading of" << path << "failed";
imgFile.close();
qDebug() << path << "is pixmap null" << p.isNull();
}
And sometimes I receive: loading failed and pixmap is null. Reloading of
such images is successfull...
I can't reproduce reading of saved on the half image. May be ReadWrite
mode has fixed the problem... I do not know.
>
> -John Weeks
>
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--
Best Regards,
Igor Mironchik.
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