Best way to delete large amout of file on Symbian

[Fillinger]

Hi all,

I search a way to delete a large amout of small png file(256x256), like 2000 or more files. In desktop computer, no problem but I deal with a Nokia 5800 and I would like to be as fast as possible.

does someone know the best way to do that?

thank you.

[divanov]

Are you asking about Qt means?

[Fillinger]

yes, with Qt.

I try this code :

QStringList filter;
    filter <<"*.png";

    QDir dir = QDir(DIR);

    QString path = DIR;
    path+="%1";
    dir.setNameFilters(filter);
    QStringList dirs = dir.entryList(filter);

    for(int i=0;i<dirs.count();i++)
    {
        qDebug()<<dirs.at(i);
        if(QFile::remove(path.arg(dirs.at(i))))
            emit DeleteProgress(1);
    }
    emit DeleteFinished();
    return true;

but it doesn't work, it block on the dir.entryList(filter);

Maybe a better way exist to do the job ?

[danhicksbyron]

Does the app have the necessary capabilities? In particular, ReadUserData and WriteUserData?

[Fillinger]

I put it in the .pro file : "TARGET.CAPABILITY += ReadUserData" but not "WriteUserData".
I will put that in my .pro file.

I will post the result.

thanks for reply

[Fillinger]

I wake up this thread because after some test, the problem stay.

It stop on the line : QStringList dirs = dir.entryList(filter);. A also try to remove the filter but that's not work.

thanks for reply.

[danhicksbyron]

What do you mean by "stop"? What happens -- hang, panic, app just goes "poof"?

[Fillinger]

The app doesn't react after that line, impossible to interact. I try debug and I wait few minute, but the app hang, and I don't receive any error.

[danhicksbyron]

What is DIR?

[Fillinger]

What is DIR?

DIR is a define of the path of the directory

#ifndef DIR
#define DIR "e:\\Cache\\"
#endif

[danhicksbyron]

Qt uses "/" as a universal directory separator in the same way that "/" is used as a path separator in URLs. If you always use "/" as a directory separator, Qt will translate your paths to conform to the underlying operating system.

http://doc.qt.nokia.com/4.6-snapshot/qdir.html

[Fillinger]

I try with "e:/Cache/" , "e:/Cache", "e://Cache" , "e://Cache//" and nothing work, always hang on the command : dir.entryList(filter);

Is it possible that the number of file is too big ? If it is do you have an idea to delete all the files? without remove the directory.

[danhicksbyron]

Are you sure that e:/Cache even exists? Remember, the view you get from Ovi isn't a true view of the file system.

[Fillinger]

Yes the directory exist, I check at the begin of the execution and if it doesn't exist I create it.

[Fillinger]

Nobody have an idea of what cause this? I need that method to work, because I need it for others works, like check if some file are in the SD Card.
Because it's slow to check if the file exist on the SD (300ms +/-) , I think to load all file name (QDir::entryList) and check if the list contain my file.

But QDir::entryList not work .

I need someone to help me .