Copy directory using Qt

Question

I want to copy a directory from one drive to another drive. My selected directory contains many sub directories and files.

How can I implement the same using Qt?

Answer 1

Try this:

bool copyDirectoryFiles(const QString &fromDir, const QString &toDir, bool coverFileIfExist)
{
    QDir sourceDir(fromDir);
    QDir targetDir(toDir);
    if(!targetDir.exists()){    /* if directory don't exists, build it */
        if(!targetDir.mkdir(targetDir.absolutePath()))
            return false;
    }

    QFileInfoList fileInfoList = sourceDir.entryInfoList();
    foreach(QFileInfo fileInfo, fileInfoList){
        if(fileInfo.fileName() == "." || fileInfo.fileName() == "..")
            continue;

        if(fileInfo.isDir()){    /* if it is directory, copy recursively*/
            if(!copyDirectoryFiles(fileInfo.filePath(),  
                targetDir.filePath(fileInfo.fileName()), 
                coverFileIfExist)) 
                return false;
        }
        else{            /* if coverFileIfExist == true, remove old file first */
            if(coverFileIfExist && targetDir.exists(fileInfo.fileName())){
                targetDir.remove(fileInfo.fileName());
            }

            // files copy
            if(!QFile::copy(fileInfo.filePath(),  
                targetDir.filePath(fileInfo.fileName()))){ 
                    return false;
            }
        }
    }
    return true;
}