addtorrentdialog.cpp Example File | Qt Network 5.6

Qt 5.6 | Qt Network | Torrent Example | addtorrentdialog.cpp Example File

Qt 5.6.2 Reference Documentation

# addtorrentdialog.cpp Example File

torrent/addtorrentdialog.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** You may use this file under the terms of the BSD license as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
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      **     the documentation and/or other materials provided with the
      **     distribution.
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      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
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      #include "addtorrentdialog.h"
      #include "metainfo.h"

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

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

      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(QString)),
                  this, SLOT(setTorrent(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();
      }