asked on

Traversing thru directory structure for files

Hello experts.

I started C++ with Qt two days ago, and I am stock in trying to traverse thru my directory structure for MP3 files. I have found something and worked a little on that, I now have this;

void tjekdir(){
    QDir dir;
    dir.setPath("/home/you/Music/Some Artist");
dir.setFilter(QDir::Files | QDir::Hidden | QDir::NoSymLinks | QDir::AllDirs | QDir::NoDotAndDotDot | QDir::Dirs);
dir.setSorting(QDir::Size | QDir::Reversed);
    QFileInfoList list = dir.entryInfoList();
    std::cout << "   Extension Path Bytes" << std::endl;
    for (int i = 0; i < list.size(); ++i) {
    QFileInfo fileInfo = list.at(i);
    std::cout << qPrintable(QString("%1 %2 %3")
.arg(fileInfo.suffix())
.arg(fileInfo.absoluteFilePath())
.arg(fileInfo.size(), 10));

    std::cout << std::endl;
    }    
}

Open in new window

As you see the code only find the files in that specific given directory, it does'nt go thru the structure what is what I want.
Can anyone help me further with this, thank you!

Jacob

Karrtik Iyer

Have you looked at QDirIterator? I think it might help you.
Something like below should work for you :
QDirIterator it(dir, QStringList() << "*.mp3", QDir::Files, QDirIterator::Subdirectories);
while (it.hasNext()) {
qDebug() << it.next();
}
http://doc.qt.io/qt-5/qdiriterator.html

Jacob

ASKER

Hello, thanks for your suggestion,

I get an error at the line here: QDirIterator it(dir, QStringList() << "*.mp3", QDir::Files, QDirIterator::Subdirectories);

This error message:
no matching function for call to 'QDirIterator::QDirIterator(QDir&, QStringList&, QDir::Filter, QDirIterator::IteratorFlag)'
QDirIterator it(dir, QStringList() << "*.mp3", QDir::Files, QDirIterator::Subdirectories);

I am not sure why, or what to do..
What can I do?

Karrtik Iyer

Have you included #include <QDirIterator>?
Also which version of Qt are you using?

Jacob

ASKER

Yes I have added the #include

I have Qt Creator 3.5.1

Karrtik Iyer

Can you please write below code and let me know the Qt version?
qDebug() << QT_VERSION_STR;
Qt creator version doesn't help.

Jacob

ASKER

it says

5.5.1

Karrtik Iyer

Also can you please navigate to the the header file QDirIterator (go to the source of QDirIterator header file) and let me know what constructors does it have? Also does the compilation error message more than saying no match, does it say what could be the possible candidates?

Karrtik Iyer

Give me few minutes, I shall send you a working code with inline comments.

ASKER CERTIFIED SOLUTION

Karrtik Iyer

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Jacob

ASKER

Okay. Thankyou. I got it working. Nice of you to give me two choices. I hope we will meet again, here on this site..
Thanks.!

Jacob

Karrtik Iyer

Glad I was of some help. Thanks, and you are welcome.