Viadeo Twitter Google Bookmarks ! Facebook Digg del.icio.us MySpace Yahoo MyWeb Blinklist Netvouz Reddit Simpy StumbleUpon Bookmarks Windows Live Favorites 
Logo Documentation Qt ·  Page d'accueil  ·  Tous les espaces de nom  ·  Toutes les classes  ·  Classes principales  ·  Annotées  ·  Classes groupées  ·  Modules  ·  Fonctions  · 

mainwindow.cpp Example File
network/torrent/mainwindow.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2004-2008 Trolltech ASA. All rights reserved.
 **
 ** This file is part of the documentation of the Qt Toolkit.
 **
 ** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.2, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
** you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** In addition, as a special exception, Trolltech, as the sole
** copyright holder for Qt Designer, grants users of the Qt/Eclipse
** Integration plug-in the right for the Qt/Eclipse Integration to
** link to functionality provided by Qt Designer and its related
** libraries.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
** granted herein.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ****************************************************************************/

 #include <QtGui>

 #include "addtorrentdialog.h"
 #include "mainwindow.h"
 #include "ratecontroller.h"
 #include "torrentclient.h"

 // TorrentView extends QTreeWidget to allow drag and drop.
 class TorrentView : public QTreeWidget
 {
     Q_OBJECT
 public:
     TorrentView(QWidget *parent = 0);

 signals:
     void fileDropped(const QString &fileName);

 protected:
     void dragMoveEvent(QDragMoveEvent *event);
     void dropEvent(QDropEvent *event);
 };

 // TorrentViewDelegate is used to draw the progress bars.
 class TorrentViewDelegate : public QItemDelegate
 {
     Q_OBJECT
 public:
     inline TorrentViewDelegate(MainWindow *mainWindow) : QItemDelegate(mainWindow) {}

     inline void paint(QPainter *painter, const QStyleOptionViewItem &option,
                       const QModelIndex &index ) const
     {
         if (index.column() != 2) {
             QItemDelegate::paint(painter, option, index);
             return;
         }

         // Set up a QStyleOptionProgressBar to precisely mimic the
         // environment of a progress bar.
         QStyleOptionProgressBar progressBarOption;
         progressBarOption.state = QStyle::State_Enabled;
         progressBarOption.direction = QApplication::layoutDirection();
         progressBarOption.rect = option.rect;
         progressBarOption.fontMetrics = QApplication::fontMetrics();
         progressBarOption.minimum = 0;
         progressBarOption.maximum = 100;
         progressBarOption.textAlignment = Qt::AlignCenter;
         progressBarOption.textVisible = true;

         // Set the progress and text values of the style option.
         int progress = qobject_cast<MainWindow *>(parent())->clientForRow(index.row())->progress();
         progressBarOption.progress = progress < 0 ? 0 : progress;
         progressBarOption.text = QString().sprintf("%d%%", progressBarOption.progress);

         // Draw the progress bar onto the view.
         QApplication::style()->drawControl(QStyle::CE_ProgressBar, &progressBarOption, painter);
     }
 };

 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent), quitDialog(0), saveChanges(false)
 {
     // Initialize some static strings
     QStringList headers;
     headers << tr("Torrent") << tr("Peers/Seeds") << tr("Progress")
             << tr("Down rate") << tr("Up rate") << tr("Status");

     // Main torrent list
     torrentView = new TorrentView(this);
     torrentView->setItemDelegate(new TorrentViewDelegate(this));
     torrentView->setHeaderLabels(headers);
     torrentView->setSelectionBehavior(QAbstractItemView::SelectRows);
     torrentView->setAlternatingRowColors(true);
     torrentView->setRootIsDecorated(false);
     setCentralWidget(torrentView);

     // Set header resize modes and initial section sizes
     QFontMetrics fm = fontMetrics();
     QHeaderView *header = torrentView->header();
     header->resizeSection(0, fm.width("typical-name-for-a-torrent.torrent"));
     header->resizeSection(1, fm.width(headers.at(1) + "  "));
     header->resizeSection(2, fm.width(headers.at(2) + "  "));
     header->resizeSection(3, qMax(fm.width(headers.at(3) + "  "), fm.width(" 1234.0 KB/s ")));
     header->resizeSection(4, qMax(fm.width(headers.at(4) + "  "), fm.width(" 1234.0 KB/s ")));
     header->resizeSection(5, qMax(fm.width(headers.at(5) + "  "), fm.width(tr("Downloading") + "  ")));

     // Create common actions
     QAction *newTorrentAction = new QAction(QIcon(":/icons/bottom.png"), tr("Add &new torrent"), this);
     pauseTorrentAction = new QAction(QIcon(":/icons/player_pause.png"), tr("&Pause torrent"), this);
     removeTorrentAction = new QAction(QIcon(":/icons/player_stop.png"), tr("&Remove torrent"), this);

     // File menu
     QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
     fileMenu->addAction(newTorrentAction);
     fileMenu->addAction(pauseTorrentAction);
     fileMenu->addAction(removeTorrentAction);
     fileMenu->addSeparator();
     fileMenu->addAction(QIcon(":/icons/exit.png"), tr("E&xit"), this, SLOT(close()));

     // Help menu
     QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
     helpMenu->addAction(tr("&About"), this, SLOT(about()));
     helpMenu->addAction(tr("About &Qt"), qApp, SLOT(aboutQt()));

     // Top toolbar
     QToolBar *topBar = new QToolBar(tr("Tools"));
     addToolBar(Qt::TopToolBarArea, topBar);
     topBar->setMovable(false);
     topBar->addAction(newTorrentAction);
     topBar->addAction(removeTorrentAction);
     topBar->addAction(pauseTorrentAction);
     topBar->addSeparator();
     downActionTool = topBar->addAction(QIcon(tr(":/icons/1downarrow.png")), tr("Move down"));
     upActionTool = topBar->addAction(QIcon(tr(":/icons/1uparrow.png")), tr("Move up"));

     // Bottom toolbar
     QToolBar *bottomBar = new QToolBar(tr("Rate control"));
     addToolBar(Qt::BottomToolBarArea, bottomBar);
     bottomBar->setMovable(false);
     downloadLimitSlider = new QSlider(Qt::Horizontal);
     downloadLimitSlider->setRange(0, 1000);
     bottomBar->addWidget(new QLabel(tr("Max download:")));
     bottomBar->addWidget(downloadLimitSlider);
     bottomBar->addWidget((downloadLimitLabel = new QLabel(tr("0 KB/s"))));
     downloadLimitLabel->setFixedSize(QSize(fm.width(tr("99999 KB/s")), fm.lineSpacing()));
     bottomBar->addSeparator();
     uploadLimitSlider = new QSlider(Qt::Horizontal);
     uploadLimitSlider->setRange(0, 1000);
     bottomBar->addWidget(new QLabel(tr("Max upload:")));
     bottomBar->addWidget(uploadLimitSlider);
     bottomBar->addWidget((uploadLimitLabel = new QLabel(tr("0 KB/s"))));
     uploadLimitLabel->setFixedSize(QSize(fm.width(tr("99999 KB/s")), fm.lineSpacing()));

     // Set up connections
     connect(torrentView, SIGNAL(itemSelectionChanged()),
             this, SLOT(setActionsEnabled()));
     connect(torrentView, SIGNAL(fileDropped(const QString &)),
             this, SLOT(acceptFileDrop(const QString &)));
     connect(uploadLimitSlider, SIGNAL(valueChanged(int)),
             this, SLOT(setUploadLimit(int)));
     connect(downloadLimitSlider, SIGNAL(valueChanged(int)),
             this, SLOT(setDownloadLimit(int)));
     connect(newTorrentAction, SIGNAL(triggered()),
             this, SLOT(addTorrent()));
     connect(pauseTorrentAction, SIGNAL(triggered()),
             this, SLOT(pauseTorrent()));
     connect(removeTorrentAction, SIGNAL(triggered()),
             this, SLOT(removeTorrent()));
     connect(upActionTool, SIGNAL(triggered(bool)),
             this, SLOT(moveTorrentUp()));
     connect(downActionTool, SIGNAL(triggered(bool)),
             this, SLOT(moveTorrentDown()));

     // Load settings and start
     setWindowTitle(tr("Torrent Client"));
     setActionsEnabled();
     QMetaObject::invokeMethod(this, "loadSettings", Qt::QueuedConnection);
 }

 QSize MainWindow::sizeHint() const
 {
     const QHeaderView *header = torrentView->header();

     // Add up the sizes of all header sections. The last section is
     // stretched, so its size is relative to the size of the width;
     // instead of counting it, we count the size of its largest value.
     int width = fontMetrics().width(tr("Downloading") + "  ");
     for (int i = 0; i < header->count() - 1; ++i)
         width += header->sectionSize(i);

     return QSize(width, QMainWindow::sizeHint().height())
         .expandedTo(QApplication::globalStrut());
 }

 const TorrentClient *MainWindow::clientForRow(int row) const
 {
     // Return the client at the given row.
     return jobs.at(row).client;
 }

 int MainWindow::rowOfClient(TorrentClient *client) const
 {
     // Return the row that displays this client's status, or -1 if the
     // client is not known.
     int row = 0;
     foreach (Job job, jobs) {
         if (job.client == client)
             return row;
         ++row;
     }
     return -1;
 }

 void MainWindow::loadSettings()
 {
     // Load base settings (last working directory, upload/download limits).
     QSettings settings("Trolltech", "Torrent");
     lastDirectory = settings.value("LastDirectory").toString();
     if (lastDirectory.isEmpty())
         lastDirectory = QDir::currentPath();
     int up = settings.value("UploadLimit").toInt();
     int down = settings.value("DownloadLimit").toInt();
     uploadLimitSlider->setValue(up ? up : 170);
     downloadLimitSlider->setValue(down ? down : 550);

     // Resume all previous downloads.
     int size = settings.beginReadArray("Torrents");
     for (int i = 0; i < size; ++i) {
         settings.setArrayIndex(i);
         QByteArray resumeState = settings.value("resumeState").toByteArray();
         QString fileName = settings.value("sourceFileName").toString();
         QString dest = settings.value("destinationFolder").toString();

         if (addTorrent(fileName, dest, resumeState)) {
             TorrentClient *client = jobs.last().client;
             client->setDownloadedBytes(settings.value("downloadedBytes").toLongLong());
             client->setUploadedBytes(settings.value("uploadedBytes").toLongLong());
         }
     }
 }

 bool MainWindow::addTorrent()
 {
     // Show the file dialog, let the user select what torrent to start downloading.
     QString fileName = QFileDialog::getOpenFileName(this, tr("Choose a torrent file"),
                                                     lastDirectory,
                                                     tr("Torrents (*.torrent);;"
                                                        " All files (*.*)"));
     if (fileName.isEmpty())
         return false;
     lastDirectory = QFileInfo(fileName).absolutePath();

     // Show the "Add Torrent" dialog.
     AddTorrentDialog *addTorrentDialog = new AddTorrentDialog(this);
     addTorrentDialog->setTorrent(fileName);
     addTorrentDialog->deleteLater();
     if (!addTorrentDialog->exec())
         return false;

     // Add the torrent to our list of downloads
     addTorrent(fileName, addTorrentDialog->destinationFolder());
     if (!saveChanges) {
         saveChanges = true;
         QTimer::singleShot(1000, this, SLOT(saveSettings()));
     }
     return true;
 }

 void MainWindow::removeTorrent()
 {
     // Find the row of the current item, and find the torrent client
     // for that row.
     int row = torrentView->indexOfTopLevelItem(torrentView->currentItem());
     TorrentClient *client = jobs.at(row).client;

     // Stop the client.
     client->disconnect();
     connect(client, SIGNAL(stopped()), this, SLOT(torrentStopped()));
     client->stop();

     // Remove the row from the view.
     delete torrentView->takeTopLevelItem(row);
     jobs.removeAt(row);
     setActionsEnabled();

     saveChanges = true;
     saveSettings();
 }

 void MainWindow::torrentStopped()
 {
     // Schedule the client for deletion.
     TorrentClient *client = qobject_cast<TorrentClient *>(sender());
     client->deleteLater();

     // If the quit dialog is shown, update its progress.
     if (quitDialog) {
         if (++jobsStopped == jobsToStop)
             quitDialog->close();
     }
 }

 void MainWindow::torrentError(TorrentClient::Error)
 {
     // Delete the client.
     TorrentClient *client = qobject_cast<TorrentClient *>(sender());
     int row = rowOfClient(client);
     QString fileName = jobs.at(row).torrentFileName;
     jobs.removeAt(row);

     // Display the warning.
     QMessageBox::warning(this, tr("Error"),
                          tr("An error occurred while downloading %0: %1")
                          .arg(fileName)
                          .arg(client->errorString()));

     delete torrentView->takeTopLevelItem(row);
     client->deleteLater();
 }

 bool MainWindow::addTorrent(const QString &fileName, const QString &destinationFolder,
                             const QByteArray &resumeState)
 {
     // Check if the torrent is already being downloaded.
     foreach (Job job, jobs) {
         if (job.torrentFileName == fileName && job.destinationDirectory == destinationFolder) {
             QMessageBox::warning(this, tr("Already downloading"),
                                  tr("The torrent file you have selected is "
                                     "already being downloaded."));
             return false;
         }
     }

     // Create a new torrent client and attempt to parse the torrent data.
     TorrentClient *client = new TorrentClient(this);
     if (!client->setTorrent(fileName)) {
         QMessageBox::warning(this, tr("Error"),
                              tr("The torrent file you have selected can not be opened."));
         delete client;
         return false;
     }
     client->setDestinationFolder(destinationFolder);
     client->setDumpedState(resumeState);

     // Setup the client connections.
     connect(client, SIGNAL(stateChanged(TorrentClient::State)), this, SLOT(updateState(TorrentClient::State)));
     connect(client, SIGNAL(peerInfoUpdated()), this, SLOT(updatePeerInfo()));
     connect(client, SIGNAL(progressUpdated(int)), this, SLOT(updateProgress(int)));
     connect(client, SIGNAL(downloadRateUpdated(int)), this, SLOT(updateDownloadRate(int)));
     connect(client, SIGNAL(uploadRateUpdated(int)), this, SLOT(updateUploadRate(int)));
     connect(client, SIGNAL(stopped()), this, SLOT(torrentStopped()));
     connect(client, SIGNAL(error(TorrentClient::Error)), this, SLOT(torrentError(TorrentClient::Error)));

     // Add the client to the list of downloading jobs.
     Job job;
     job.client = client;
     job.torrentFileName = fileName;
     job.destinationDirectory = destinationFolder;
     jobs << job;

     // Create and add a row in the torrent view for this download.
     QTreeWidgetItem *item = new QTreeWidgetItem(torrentView);

     QString baseFileName = QFileInfo(fileName).fileName();
     if (baseFileName.toLower().endsWith(".torrent"))
         baseFileName.remove(baseFileName.size() - 8);

     item->setText(0, baseFileName);
     item->setToolTip(0, tr("Torrent: %1<br>Destination: %2")
                      .arg(baseFileName).arg(destinationFolder));
     item->setText(1, tr("0/0"));
     item->setText(2, "0");
     item->setText(3, "0.0 KB/s");
     item->setText(4, "0.0 KB/s");
     item->setText(5, tr("Idle"));
     item->setFlags(item->flags() & ~Qt::ItemIsEditable);
     item->setTextAlignment(1, Qt::AlignHCenter);

     if (!saveChanges) {
         saveChanges = true;
         QTimer::singleShot(5000, this, SLOT(saveSettings()));
     }
     client->start();
     return true;
 }

 void MainWindow::saveSettings()
 {
     if (!saveChanges)
       return;
     saveChanges = false;

     // Prepare and reset the settings
     QSettings settings("Trolltech", "Torrent");
     settings.clear();

     settings.setValue("LastDirectory", lastDirectory);
     settings.setValue("UploadLimit", uploadLimitSlider->value());
     settings.setValue("DownloadLimit", downloadLimitSlider->value());

     // Store data on all known torrents
     settings.beginWriteArray("Torrents");
     for (int i = 0; i < jobs.size(); ++i) {
         settings.setArrayIndex(i);
         settings.setValue("sourceFileName", jobs.at(i).torrentFileName);
         settings.setValue("destinationFolder", jobs.at(i).destinationDirectory);
         settings.setValue("uploadedBytes", jobs.at(i).client->uploadedBytes());
         settings.setValue("downloadedBytes", jobs.at(i).client->downloadedBytes());
         settings.setValue("resumeState", jobs.at(i).client->dumpedState());
     }
     settings.endArray();
     settings.sync();
 }

 void MainWindow::updateState(TorrentClient::State)
 {
     // Update the state string whenever the client's state changes.
     TorrentClient *client = qobject_cast<TorrentClient *>(sender());
     int row = rowOfClient(client);
     QTreeWidgetItem *item = torrentView->topLevelItem(row);
     if (item) {
         item->setToolTip(0, tr("Torrent: %1<br>Destination: %2<br>State: %3")
                          .arg(jobs.at(row).torrentFileName)
                          .arg(jobs.at(row).destinationDirectory)
                          .arg(client->stateString()));

         item->setText(5, client->stateString());
     }
     setActionsEnabled();
 }

 void MainWindow::updatePeerInfo()
 {
     // Update the number of connected, visited, seed and leecher peers.
     TorrentClient *client = qobject_cast<TorrentClient *>(sender());
     int row = rowOfClient(client);

     QTreeWidgetItem *item = torrentView->topLevelItem(row);
     item->setText(1, tr("%1/%2").arg(client->connectedPeerCount())
                   .arg(client->seedCount()));
 }

 void MainWindow::updateProgress(int percent)
 {
     TorrentClient *client = qobject_cast<TorrentClient *>(sender());
     int row = rowOfClient(client);

     // Update the progressbar.
     QTreeWidgetItem *item = torrentView->topLevelItem(row);
     if (item)
         item->setText(2, QString::number(percent));
 }

 void MainWindow::setActionsEnabled()
 {
     // Find the view item and client for the current row, and update
     // the states of the actions.
     QTreeWidgetItem *item = 0;
     if (!torrentView->selectedItems().isEmpty())
         item = torrentView->selectedItems().first();
     TorrentClient *client = item ? jobs.at(torrentView->indexOfTopLevelItem(item)).client : 0;
     bool pauseEnabled = client && ((client->state() == TorrentClient::Paused)
                                        ||  (client->state() > TorrentClient::Preparing));

     removeTorrentAction->setEnabled(item != 0);
     pauseTorrentAction->setEnabled(item != 0 && pauseEnabled);

     if (client && client->state() == TorrentClient::Paused) {
         pauseTorrentAction->setIcon(QIcon(":/icons/player_play.png"));
         pauseTorrentAction->setText(tr("Resume torrent"));
     } else {
         pauseTorrentAction->setIcon(QIcon(":/icons/player_pause.png"));
         pauseTorrentAction->setText(tr("Pause torrent"));
     }

     int row = torrentView->indexOfTopLevelItem(item);
     upActionTool->setEnabled(item && row != 0);
     downActionTool->setEnabled(item && row != jobs.size() - 1);
 }

 void MainWindow::updateDownloadRate(int bytesPerSecond)
 {
     // Update the download rate.
     TorrentClient *client = qobject_cast<TorrentClient *>(sender());
     int row = rowOfClient(client);
     QString num;
     num.sprintf("%.1f KB/s", bytesPerSecond / 1024.0);
     torrentView->topLevelItem(row)->setText(3, num);

     if (!saveChanges) {
         saveChanges = true;
         QTimer::singleShot(5000, this, SLOT(saveSettings()));
     }
 }

 void MainWindow::updateUploadRate(int bytesPerSecond)
 {
     // Update the upload rate.
     TorrentClient *client = qobject_cast<TorrentClient *>(sender());
     int row = rowOfClient(client);
     QString num;
     num.sprintf("%.1f KB/s", bytesPerSecond / 1024.0);
     torrentView->topLevelItem(row)->setText(4, num);

     if (!saveChanges) {
         saveChanges = true;
         QTimer::singleShot(5000, this, SLOT(saveSettings()));
     }
 }

 void MainWindow::pauseTorrent()
 {
     // Pause or unpause the current torrent.
     int row = torrentView->indexOfTopLevelItem(torrentView->currentItem());
     TorrentClient *client = jobs.at(row).client;
     client->setPaused(client->state() != TorrentClient::Paused);
     setActionsEnabled();
 }

 void MainWindow::moveTorrentUp()
 {
     QTreeWidgetItem *item = torrentView->currentItem();
     int row = torrentView->indexOfTopLevelItem(item);
     if (row == 0)
         return;

     Job tmp = jobs.at(row - 1);
     jobs[row - 1] = jobs[row];
     jobs[row] = tmp;

     QTreeWidgetItem *itemAbove = torrentView->takeTopLevelItem(row - 1);
     torrentView->insertTopLevelItem(row, itemAbove);
     setActionsEnabled();
 }

 void MainWindow::moveTorrentDown()
 {
     QTreeWidgetItem *item = torrentView->currentItem();
     int row = torrentView->indexOfTopLevelItem(item);
     if (row == jobs.size() - 1)
         return;

     Job tmp = jobs.at(row + 1);
     jobs[row + 1] = jobs[row];
     jobs[row] = tmp;

     QTreeWidgetItem *itemAbove = torrentView->takeTopLevelItem(row + 1);
     torrentView->insertTopLevelItem(row, itemAbove);
     setActionsEnabled();
 }

 static int rateFromValue(int value)
 {
     int rate = 0;
     if (value >= 0 && value < 250) {
         rate = 1 + int(value * 0.124);
     } else if (value < 500) {
         rate = 32 + int((value - 250) * 0.384);
     } else if (value < 750) {
         rate = 128 + int((value - 500) * 1.536);
     } else {
         rate = 512 + int((value - 750) * 6.1445);
     }
     return rate;
 }

 void MainWindow::setUploadLimit(int value)
 {
     int rate = rateFromValue(value);
     uploadLimitLabel->setText(tr("%1 KB/s").arg(QString().sprintf("%4d", rate)));
     RateController::instance()->setUploadLimit(rate * 1024);
 }

 void MainWindow::setDownloadLimit(int value)
 {
     int rate = rateFromValue(value);
     downloadLimitLabel->setText(tr("%1 KB/s").arg(QString().sprintf("%4d", rate)));
     RateController::instance()->setDownloadLimit(rate * 1024);
 }

 void MainWindow::about()
 {
     QLabel *icon = new QLabel;
     icon->setPixmap(QPixmap(":/icons/peertopeer.png"));

     QLabel *text = new QLabel;
     text->setWordWrap(true);
     text->setText("<p>The <b>Torrent Client</b> example demonstrates how to"
                   " write a complete peer-to-peer file sharing"
                   " application using Qt's network and thread classes.</p>"
                   "<p>This feature complete client implementation of"
                   " the BitTorrent protocol can efficiently"
                   " maintain several hundred network connections"
                   " simultaneously.</p>");

     QPushButton *quitButton = new QPushButton("OK");

     QHBoxLayout *topLayout = new QHBoxLayout;
     topLayout->setMargin(10);
     topLayout->setSpacing(10);
     topLayout->addWidget(icon);
     topLayout->addWidget(text);

     QHBoxLayout *bottomLayout = new QHBoxLayout;
     bottomLayout->addStretch();
     bottomLayout->addWidget(quitButton);
     bottomLayout->addStretch();

     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addLayout(topLayout);
     mainLayout->addLayout(bottomLayout);

     QDialog about(this);
     about.setModal(true);
     about.setWindowTitle(tr("About Torrent Client"));
     about.setLayout(mainLayout);

     connect(quitButton, SIGNAL(clicked()), &about, SLOT(close()));

     about.exec();
 }

 void MainWindow::acceptFileDrop(const QString &fileName)
 {
     // Create and show the "Add Torrent" dialog.
     AddTorrentDialog *addTorrentDialog = new AddTorrentDialog;
     lastDirectory = QFileInfo(fileName).absolutePath();
     addTorrentDialog->setTorrent(fileName);
     addTorrentDialog->deleteLater();
     if (!addTorrentDialog->exec())
         return;

     // Add the torrent to our list of downloads.
     addTorrent(fileName, addTorrentDialog->destinationFolder());
     saveSettings();
 }

 void MainWindow::closeEvent(QCloseEvent *)
 {
     if (jobs.isEmpty())
         return;

     // Save upload / download numbers.
     saveSettings();
     saveChanges = false;

     quitDialog = new QProgressDialog(tr("Disconnecting from trackers"), tr("Abort"), 0, jobsToStop, this);

     // Stop all clients, remove the rows from the view and wait for
     // them to signal that they have stopped.
     jobsToStop = 0;
     jobsStopped = 0;
     foreach (Job job, jobs) {
         ++jobsToStop;
         TorrentClient *client = job.client;
         client->disconnect();
         connect(client, SIGNAL(stopped()), this, SLOT(torrentStopped()));
         client->stop();
         delete torrentView->takeTopLevelItem(0);
     }

     if (jobsToStop > jobsStopped)
         quitDialog->exec();
     quitDialog->deleteLater();
     quitDialog = 0;
 }

 TorrentView::TorrentView(QWidget *parent)
     : QTreeWidget(parent)
 {
     setAcceptDrops(true);
 }

 void TorrentView::dragMoveEvent(QDragMoveEvent *event)
 {
     // Accept file actions with a '.torrent' extension.
     QUrl url(event->mimeData()->text());
     if (url.isValid() && url.scheme().toLower() == "file"
             && url.path().toLower().endsWith(".torrent"))
         event->acceptProposedAction();
 }

 void TorrentView::dropEvent(QDropEvent *event)
 {
     // Accept drops if the file has a '.torrent' extension and it
     // exists.
     QString fileName = QUrl(event->mimeData()->text()).path();
     if (QFile::exists(fileName) && fileName.toLower().endsWith(".torrent"))
         emit fileDropped(fileName);
 }

 #include "mainwindow.moc"

Publicité

Best Of

Actualités les plus lues

Semaine
Mois
Année
  1. « Quelque chose ne va vraiment pas avec les développeurs "modernes" », un développeur à "l'ancienne" critique la multiplication des bibliothèques 65
  2. Apercevoir la troisième dimension ou l'utilisation multithreadée d'OpenGL dans Qt, un article des Qt Quarterly traduit par Guillaume Belz 0
  3. Les développeurs ignorent-ils trop les failles découvertes dans leur code ? Prenez-vous en compte les remarques des autres ? 17
  4. BlackBerry 10 : premières images du prochain OS de RIM qui devrait intégrer des widgets et des tuiles inspirées de Windows Phone 0
  5. Quelles nouveautés de C++11 Visual C++ doit-il rapidement intégrer ? Donnez-nous votre avis 10
  6. Adieu qmake, bienvenue qbs : Qt Building Suite, un outil déclaratif et extensible pour la compilation de projets Qt 17
  7. La rubrique Qt a besoin de vous ! 1
Page suivante

Le Qt Developer Network au hasard

Logo

Applications mobiles modernes avec Qt et QML

Le Qt Developer Network est un réseau de développeurs Qt anglophone, où ils peuvent partager leur expérience sur le framework. Lire l'article.

Communauté

Ressources

Liens utiles

Contact

  • Vous souhaitez rejoindre la rédaction ou proposer un tutoriel, une traduction, une question... ? Postez dans le forum Contribuez ou contactez-nous par MP ou par email (voir en bas de page).

Qt dans le magazine

Cette page est une traduction d'une page de la documentation de Qt, écrite par Nokia Corporation and/or its subsidiary(-ies). Les éventuels problèmes résultant d'une mauvaise traduction ne sont pas imputables à Nokia. Qt 4.3
Copyright © 2012 Developpez LLC. Tous droits réservés Developpez LLC. Aucune reproduction, même partielle, ne peut être faite de ce site et de l'ensemble de son contenu : textes, documents et images sans l'autorisation expresse de Developpez LLC. Sinon, vous encourez selon la loi jusqu'à 3 ans de prison et jusqu'à 300 000 E de dommages et intérêts. Cette page est déposée à la SACD.
Vous avez déniché une erreur ? Un bug ? Une redirection cassée ? Ou tout autre problème, quel qu'il soit ? Ou bien vous désirez participer à ce projet de traduction ? N'hésitez pas à nous contacter ou par MP !
 
 
 
 
Partenaires

Hébergement Web