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addtorrentdialog.cpp Example File
network/torrent/addtorrentdialog.cpp

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 #include "addtorrentdialog.h"
 #include "metainfo.h"

 #include <QFile>
 #include <QFileDialog>
 #include <QLineEdit>
 #include <QMetaObject>

 static QString stringNumber(qint64 number)
 {
     QString tmp;
     if (number > (1024 * 1024 * 1024))
         tmp.sprintf("%.2fGB", number / (1024.0 * 1024.0 * 1024.0));
     else if (number > (1024 * 1024))
         tmp.sprintf("%.2fMB", number / (1024.0 * 1024.0));
     else if (number > (1024))
         tmp.sprintf("%.2fKB", number / (1024.0));
     else
         tmp.sprintf("%d bytes", int(number));
     return tmp;
 }

 AddTorrentDialog::AddTorrentDialog(QWidget *parent)
   : QDialog(parent, Qt::Sheet)
 {
     ui.setupUi(this);

     connect(ui.browseTorrents, SIGNAL(clicked()),
             this, SLOT(selectTorrent()));
     connect(ui.browseDestination, SIGNAL(clicked()),
             this, SLOT(selectDestination()));
     connect(ui.torrentFile, SIGNAL(textChanged(const QString &)),
             this, SLOT(setTorrent(const QString &)));

     ui.destinationFolder->setText(destinationDirectory = QDir::current().path());
     ui.torrentFile->setFocus();
 }

 void AddTorrentDialog::selectTorrent()
 {
     QString fileName = QFileDialog::getOpenFileName(this, tr("Choose a torrent file"),
                                                     lastDirectory,
                                                     tr("Torrents (*.torrent);; All files (*.*)"));
     if (fileName.isEmpty())
         return;
     lastDirectory = QFileInfo(fileName).absolutePath();
     setTorrent(fileName);
 }

 void AddTorrentDialog::selectDestination()
 {
     QString dir = QFileDialog::getExistingDirectory(this, tr("Choose a destination directory"),
                                                     lastDestinationDirectory);
     if (dir.isEmpty())
         return;
     lastDestinationDirectory = destinationDirectory = dir;
     ui.destinationFolder->setText(destinationDirectory);
     enableOkButton();
 }

 void AddTorrentDialog::enableOkButton()
 {
     ui.okButton->setEnabled(!ui.destinationFolder->text().isEmpty()
                             && !ui.torrentFile->text().isEmpty());
 }

 void AddTorrentDialog::setTorrent(const QString &torrentFile)
 {
     if (torrentFile.isEmpty()) {
         enableOkButton();
         return;
     }

     ui.torrentFile->setText(torrentFile);
     if (!torrentFile.isEmpty())
         lastDirectory = QFileInfo(torrentFile).absolutePath();

     if (lastDestinationDirectory.isEmpty())
         lastDestinationDirectory = lastDirectory;

     MetaInfo metaInfo;
     QFile torrent(torrentFile);
     if (!torrent.open(QFile::ReadOnly) || !metaInfo.parse(torrent.readAll())) {
         enableOkButton();
         return;
     }

     ui.torrentFile->setText(torrentFile);
     ui.announceUrl->setText(metaInfo.announceUrl());
     if (metaInfo.comment().isEmpty())
         ui.commentLabel->setText("<unknown>");
     else
         ui.commentLabel->setText(metaInfo.comment());
     if (metaInfo.createdBy().isEmpty())
         ui.creatorLabel->setText("<unknown>");
     else
         ui.creatorLabel->setText(metaInfo.createdBy());
     ui.sizeLabel->setText(stringNumber(metaInfo.totalSize()));
     if (metaInfo.fileForm() == MetaInfo::SingleFileForm) {
         ui.torrentContents->setHtml(metaInfo.singleFile().name);
     } else {
         QString html;
         foreach (MetaInfoMultiFile file, metaInfo.multiFiles()) {
             QString name = metaInfo.name();
             if (!name.isEmpty()) {
                 html += name;
                 if (!name.endsWith('/'))
                     html += '/';
             }
             html += file.path + "<br>";
         }
         ui.torrentContents->setHtml(html);
     }

     QFileInfo info(torrentFile);
     ui.destinationFolder->setText(info.absolutePath());

     enableOkButton();
 }

 QString AddTorrentDialog::torrentFileName() const
 {
     return ui.torrentFile->text();
 }

 QString AddTorrentDialog::destinationFolder() const
 {
     return ui.destinationFolder->text();
 }