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  • Committer: Bazaar Package Importer
  • Author(s): Jonathan Riddell
  • Date: 2011-01-18 20:37:32 UTC
  • Revision ID: james.westby@ubuntu.com-20110118203732-butn2uvaa6hydoqu
Tags: 4:4.7.1-0ubuntu8
Add kubuntu_26_dbusconnection_pointer.diff,
kubuntu_27_dbus_signal_filter_passes_not_handled.diff from Qt 4.8
to add a way to obtain the DBusConnectionpointer from a
QDBusConnection.  Requested by Ryan Lortie

Show diffs side-by-side

added added

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.pc/debian-changes-4:4.7.1-0ubuntu7/doc/html/network-torrent-mainwindow-cpp.html
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<h1 class="title">mainwindow.cpp Example File</h1>
143
 
<span class="small-subtitle">network/torrent/mainwindow.cpp</span>
144
 
<!-- $$$network/torrent/mainwindow.cpp-description -->
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<div class="descr"> <a name="details"></a>
146
 
<pre class="highlightedCode brush: cpp"><span class="comment"> /****************************************************************************
147
 
 **
148
 
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
149
 
 ** All rights reserved.
150
 
 ** Contact: Nokia Corporation (qt-info@nokia.com)
151
 
 **
152
 
 ** This file is part of the examples of the Qt Toolkit.
153
 
 **
154
 
 ** $QT_BEGIN_LICENSE:BSD$
155
 
 ** You may use this file under the terms of the BSD license as follows:
156
 
 **
157
 
 ** &quot;Redistribution and use in source and binary forms, with or without
158
 
 ** modification, are permitted provided that the following conditions are
159
 
 ** met:
160
 
 **   * Redistributions of source code must retain the above copyright
161
 
 **     notice, this list of conditions and the following disclaimer.
162
 
 **   * Redistributions in binary form must reproduce the above copyright
163
 
 **     notice, this list of conditions and the following disclaimer in
164
 
 **     the documentation and/or other materials provided with the
165
 
 **     distribution.
166
 
 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
167
 
 **     the names of its contributors may be used to endorse or promote
168
 
 **     products derived from this software without specific prior written
169
 
 **     permission.
170
 
 **
171
 
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
172
 
 ** &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
173
 
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
174
 
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
175
 
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
176
 
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
177
 
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
178
 
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
179
 
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
180
 
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
181
 
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
182
 
 ** $QT_END_LICENSE$
183
 
 **
184
 
 ****************************************************************************/</span>
185
 
 
186
 
 #include &lt;QtGui&gt;
187
 
 
188
 
 #include &quot;addtorrentdialog.h&quot;
189
 
 #include &quot;mainwindow.h&quot;
190
 
 #include &quot;ratecontroller.h&quot;
191
 
 #include &quot;torrentclient.h&quot;
192
 
 
193
 
<span class="comment"> // TorrentView extends QTreeWidget to allow drag and drop.</span>
194
 
 class TorrentView : public QTreeWidget
195
 
 {
196
 
     Q_OBJECT
197
 
 public:
198
 
     TorrentView(QWidget *parent = 0);
199
 
 
200
 
 signals:
201
 
     void fileDropped(const QString &amp;fileName);
202
 
 
203
 
 protected:
204
 
     void dragMoveEvent(QDragMoveEvent *event);
205
 
     void dropEvent(QDropEvent *event);
206
 
 };
207
 
 
208
 
<span class="comment"> // TorrentViewDelegate is used to draw the progress bars.</span>
209
 
 class TorrentViewDelegate : public QItemDelegate
210
 
 {
211
 
     Q_OBJECT
212
 
 public:
213
 
     inline TorrentViewDelegate(MainWindow *mainWindow) : QItemDelegate(mainWindow) {}
214
 
 
215
 
     inline void paint(QPainter *painter, const QStyleOptionViewItem &amp;option,
216
 
                       const QModelIndex &amp;index ) const
217
 
     {
218
 
         if (index.column() != 2) {
219
 
             QItemDelegate::paint(painter, option, index);
220
 
             return;
221
 
         }
222
 
 
223
 
         <span class="comment">// Set up a QStyleOptionProgressBar to precisely mimic the</span>
224
 
         <span class="comment">// environment of a progress bar.</span>
225
 
         QStyleOptionProgressBar progressBarOption;
226
 
         progressBarOption.state = QStyle::State_Enabled;
227
 
         progressBarOption.direction = QApplication::layoutDirection();
228
 
         progressBarOption.rect = option.rect;
229
 
         progressBarOption.fontMetrics = QApplication::fontMetrics();
230
 
         progressBarOption.minimum = 0;
231
 
         progressBarOption.maximum = 100;
232
 
         progressBarOption.textAlignment = Qt::AlignCenter;
233
 
         progressBarOption.textVisible = true;
234
 
 
235
 
         <span class="comment">// Set the progress and text values of the style option.</span>
236
 
         int progress = qobject_cast&lt;MainWindow *&gt;(parent())-&gt;clientForRow(index.row())-&gt;progress();
237
 
         progressBarOption.progress = progress &lt; 0 ? 0 : progress;
238
 
         progressBarOption.text = QString().sprintf(&quot;%d%%&quot;, progressBarOption.progress);
239
 
 
240
 
         <span class="comment">// Draw the progress bar onto the view.</span>
241
 
         QApplication::style()-&gt;drawControl(QStyle::CE_ProgressBar, &amp;progressBarOption, painter);
242
 
     }
243
 
 };
244
 
 
245
 
 MainWindow::MainWindow(QWidget *parent)
246
 
     : QMainWindow(parent), quitDialog(0), saveChanges(false)
247
 
 {
248
 
     <span class="comment">// Initialize some static strings</span>
249
 
     QStringList headers;
250
 
     headers &lt;&lt; tr(&quot;Torrent&quot;) &lt;&lt; tr(&quot;Peers/Seeds&quot;) &lt;&lt; tr(&quot;Progress&quot;)
251
 
             &lt;&lt; tr(&quot;Down rate&quot;) &lt;&lt; tr(&quot;Up rate&quot;) &lt;&lt; tr(&quot;Status&quot;);
252
 
 
253
 
     <span class="comment">// Main torrent list</span>
254
 
     torrentView = new TorrentView(this);
255
 
     torrentView-&gt;setItemDelegate(new TorrentViewDelegate(this));
256
 
     torrentView-&gt;setHeaderLabels(headers);
257
 
     torrentView-&gt;setSelectionBehavior(QAbstractItemView::SelectRows);
258
 
     torrentView-&gt;setAlternatingRowColors(true);
259
 
     torrentView-&gt;setRootIsDecorated(false);
260
 
     setCentralWidget(torrentView);
261
 
 
262
 
     <span class="comment">// Set header resize modes and initial section sizes</span>
263
 
     QFontMetrics fm = fontMetrics();
264
 
     QHeaderView *header = torrentView-&gt;header();
265
 
     header-&gt;resizeSection(0, fm.width(&quot;typical-name-for-a-torrent.torrent&quot;));
266
 
     header-&gt;resizeSection(1, fm.width(headers.at(1) + &quot;  &quot;));
267
 
     header-&gt;resizeSection(2, fm.width(headers.at(2) + &quot;  &quot;));
268
 
     header-&gt;resizeSection(3, qMax(fm.width(headers.at(3) + &quot;  &quot;), fm.width(&quot; 1234.0 KB/s &quot;)));
269
 
     header-&gt;resizeSection(4, qMax(fm.width(headers.at(4) + &quot;  &quot;), fm.width(&quot; 1234.0 KB/s &quot;)));
270
 
     header-&gt;resizeSection(5, qMax(fm.width(headers.at(5) + &quot;  &quot;), fm.width(tr(&quot;Downloading&quot;) + &quot;  &quot;)));
271
 
 
272
 
     <span class="comment">// Create common actions</span>
273
 
     QAction *newTorrentAction = new QAction(QIcon(&quot;:/icons/bottom.png&quot;), tr(&quot;Add &amp;new torrent&quot;), this);
274
 
     pauseTorrentAction = new QAction(QIcon(&quot;:/icons/player_pause.png&quot;), tr(&quot;&amp;Pause torrent&quot;), this);
275
 
     removeTorrentAction = new QAction(QIcon(&quot;:/icons/player_stop.png&quot;), tr(&quot;&amp;Remove torrent&quot;), this);
276
 
 
277
 
     <span class="comment">// File menu</span>
278
 
     QMenu *fileMenu = menuBar()-&gt;addMenu(tr(&quot;&amp;File&quot;));
279
 
     fileMenu-&gt;addAction(newTorrentAction);
280
 
     fileMenu-&gt;addAction(pauseTorrentAction);
281
 
     fileMenu-&gt;addAction(removeTorrentAction);
282
 
     fileMenu-&gt;addSeparator();
283
 
     fileMenu-&gt;addAction(QIcon(&quot;:/icons/exit.png&quot;), tr(&quot;E&amp;xit&quot;), this, SLOT(close()));
284
 
 
285
 
     <span class="comment">// Help menu</span>
286
 
     QMenu *helpMenu = menuBar()-&gt;addMenu(tr(&quot;&amp;Help&quot;));
287
 
     helpMenu-&gt;addAction(tr(&quot;&amp;About&quot;), this, SLOT(about()));
288
 
     helpMenu-&gt;addAction(tr(&quot;About &amp;Qt&quot;), qApp, SLOT(aboutQt()));
289
 
 
290
 
     <span class="comment">// Top toolbar</span>
291
 
     QToolBar *topBar = new QToolBar(tr(&quot;Tools&quot;));
292
 
     addToolBar(Qt::TopToolBarArea, topBar);
293
 
     topBar-&gt;setMovable(false);
294
 
     topBar-&gt;addAction(newTorrentAction);
295
 
     topBar-&gt;addAction(removeTorrentAction);
296
 
     topBar-&gt;addAction(pauseTorrentAction);
297
 
     topBar-&gt;addSeparator();
298
 
     downActionTool = topBar-&gt;addAction(QIcon(tr(&quot;:/icons/1downarrow.png&quot;)), tr(&quot;Move down&quot;));
299
 
     upActionTool = topBar-&gt;addAction(QIcon(tr(&quot;:/icons/1uparrow.png&quot;)), tr(&quot;Move up&quot;));
300
 
 
301
 
     <span class="comment">// Bottom toolbar</span>
302
 
     QToolBar *bottomBar = new QToolBar(tr(&quot;Rate control&quot;));
303
 
     addToolBar(Qt::BottomToolBarArea, bottomBar);
304
 
     bottomBar-&gt;setMovable(false);
305
 
     downloadLimitSlider = new QSlider(Qt::Horizontal);
306
 
     downloadLimitSlider-&gt;setRange(0, 1000);
307
 
     bottomBar-&gt;addWidget(new QLabel(tr(&quot;Max download:&quot;)));
308
 
     bottomBar-&gt;addWidget(downloadLimitSlider);
309
 
     bottomBar-&gt;addWidget((downloadLimitLabel = new QLabel(tr(&quot;0 KB/s&quot;))));
310
 
     downloadLimitLabel-&gt;setFixedSize(QSize(fm.width(tr(&quot;99999 KB/s&quot;)), fm.lineSpacing()));
311
 
     bottomBar-&gt;addSeparator();
312
 
     uploadLimitSlider = new QSlider(Qt::Horizontal);
313
 
     uploadLimitSlider-&gt;setRange(0, 1000);
314
 
     bottomBar-&gt;addWidget(new QLabel(tr(&quot;Max upload:&quot;)));
315
 
     bottomBar-&gt;addWidget(uploadLimitSlider);
316
 
     bottomBar-&gt;addWidget((uploadLimitLabel = new QLabel(tr(&quot;0 KB/s&quot;))));
317
 
     uploadLimitLabel-&gt;setFixedSize(QSize(fm.width(tr(&quot;99999 KB/s&quot;)), fm.lineSpacing()));
318
 
 
319
 
     <span class="comment">// Set up connections</span>
320
 
     connect(torrentView, SIGNAL(itemSelectionChanged()),
321
 
             this, SLOT(setActionsEnabled()));
322
 
     connect(torrentView, SIGNAL(fileDropped(QString)),
323
 
             this, SLOT(acceptFileDrop(QString)));
324
 
     connect(uploadLimitSlider, SIGNAL(valueChanged(int)),
325
 
             this, SLOT(setUploadLimit(int)));
326
 
     connect(downloadLimitSlider, SIGNAL(valueChanged(int)),
327
 
             this, SLOT(setDownloadLimit(int)));
328
 
     connect(newTorrentAction, SIGNAL(triggered()),
329
 
             this, SLOT(addTorrent()));
330
 
     connect(pauseTorrentAction, SIGNAL(triggered()),
331
 
             this, SLOT(pauseTorrent()));
332
 
     connect(removeTorrentAction, SIGNAL(triggered()),
333
 
             this, SLOT(removeTorrent()));
334
 
     connect(upActionTool, SIGNAL(triggered(bool)),
335
 
             this, SLOT(moveTorrentUp()));
336
 
     connect(downActionTool, SIGNAL(triggered(bool)),
337
 
             this, SLOT(moveTorrentDown()));
338
 
 
339
 
     <span class="comment">// Load settings and start</span>
340
 
     setWindowTitle(tr(&quot;Torrent Client&quot;));
341
 
     setActionsEnabled();
342
 
     QMetaObject::invokeMethod(this, &quot;loadSettings&quot;, Qt::QueuedConnection);
343
 
 }
344
 
 
345
 
 QSize MainWindow::sizeHint() const
346
 
 {
347
 
     const QHeaderView *header = torrentView-&gt;header();
348
 
 
349
 
     <span class="comment">// Add up the sizes of all header sections. The last section is</span>
350
 
     <span class="comment">// stretched, so its size is relative to the size of the width;</span>
351
 
     <span class="comment">// instead of counting it, we count the size of its largest value.</span>
352
 
     int width = fontMetrics().width(tr(&quot;Downloading&quot;) + &quot;  &quot;);
353
 
     for (int i = 0; i &lt; header-&gt;count() - 1; ++i)
354
 
         width += header-&gt;sectionSize(i);
355
 
 
356
 
     return QSize(width, QMainWindow::sizeHint().height())
357
 
         .expandedTo(QApplication::globalStrut());
358
 
 }
359
 
 
360
 
 const TorrentClient *MainWindow::clientForRow(int row) const
361
 
 {
362
 
     <span class="comment">// Return the client at the given row.</span>
363
 
     return jobs.at(row).client;
364
 
 }
365
 
 
366
 
 int MainWindow::rowOfClient(TorrentClient *client) const
367
 
 {
368
 
     <span class="comment">// Return the row that displays this client's status, or -1 if the</span>
369
 
     <span class="comment">// client is not known.</span>
370
 
     int row = 0;
371
 
     foreach (Job job, jobs) {
372
 
         if (job.client == client)
373
 
             return row;
374
 
         ++row;
375
 
     }
376
 
     return -1;
377
 
 }
378
 
 
379
 
 void MainWindow::loadSettings()
380
 
 {
381
 
     <span class="comment">// Load base settings (last working directory, upload/download limits).</span>
382
 
     QSettings settings(&quot;Trolltech&quot;, &quot;Torrent&quot;);
383
 
     lastDirectory = settings.value(&quot;LastDirectory&quot;).toString();
384
 
     if (lastDirectory.isEmpty())
385
 
         lastDirectory = QDir::currentPath();
386
 
     int up = settings.value(&quot;UploadLimit&quot;).toInt();
387
 
     int down = settings.value(&quot;DownloadLimit&quot;).toInt();
388
 
     uploadLimitSlider-&gt;setValue(up ? up : 170);
389
 
     downloadLimitSlider-&gt;setValue(down ? down : 550);
390
 
 
391
 
     <span class="comment">// Resume all previous downloads.</span>
392
 
     int size = settings.beginReadArray(&quot;Torrents&quot;);
393
 
     for (int i = 0; i &lt; size; ++i) {
394
 
         settings.setArrayIndex(i);
395
 
         QByteArray resumeState = settings.value(&quot;resumeState&quot;).toByteArray();
396
 
         QString fileName = settings.value(&quot;sourceFileName&quot;).toString();
397
 
         QString dest = settings.value(&quot;destinationFolder&quot;).toString();
398
 
 
399
 
         if (addTorrent(fileName, dest, resumeState)) {
400
 
             TorrentClient *client = jobs.last().client;
401
 
             client-&gt;setDownloadedBytes(settings.value(&quot;downloadedBytes&quot;).toLongLong());
402
 
             client-&gt;setUploadedBytes(settings.value(&quot;uploadedBytes&quot;).toLongLong());
403
 
         }
404
 
     }
405
 
 }
406
 
 
407
 
 bool MainWindow::addTorrent()
408
 
 {
409
 
     <span class="comment">// Show the file dialog, let the user select what torrent to start downloading.</span>
410
 
     QString fileName = QFileDialog::getOpenFileName(this, tr(&quot;Choose a torrent file&quot;),
411
 
                                                     lastDirectory,
412
 
                                                     tr(&quot;Torrents (*.torrent);;&quot;
413
 
                                                        &quot; All files (*.*)&quot;));
414
 
     if (fileName.isEmpty())
415
 
         return false;
416
 
     lastDirectory = QFileInfo(fileName).absolutePath();
417
 
 
418
 
     <span class="comment">// Show the &quot;Add Torrent&quot; dialog.</span>
419
 
     AddTorrentDialog *addTorrentDialog = new AddTorrentDialog(this);
420
 
     addTorrentDialog-&gt;setTorrent(fileName);
421
 
     addTorrentDialog-&gt;deleteLater();
422
 
     if (!addTorrentDialog-&gt;exec())
423
 
         return false;
424
 
 
425
 
     <span class="comment">// Add the torrent to our list of downloads</span>
426
 
     addTorrent(fileName, addTorrentDialog-&gt;destinationFolder());
427
 
     if (!saveChanges) {
428
 
         saveChanges = true;
429
 
         QTimer::singleShot(1000, this, SLOT(saveSettings()));
430
 
     }
431
 
     return true;
432
 
 }
433
 
 
434
 
 void MainWindow::removeTorrent()
435
 
 {
436
 
     <span class="comment">// Find the row of the current item, and find the torrent client</span>
437
 
     <span class="comment">// for that row.</span>
438
 
     int row = torrentView-&gt;indexOfTopLevelItem(torrentView-&gt;currentItem());
439
 
     TorrentClient *client = jobs.at(row).client;
440
 
 
441
 
     <span class="comment">// Stop the client.</span>
442
 
     client-&gt;disconnect();
443
 
     connect(client, SIGNAL(stopped()), this, SLOT(torrentStopped()));
444
 
     client-&gt;stop();
445
 
 
446
 
     <span class="comment">// Remove the row from the view.</span>
447
 
     delete torrentView-&gt;takeTopLevelItem(row);
448
 
     jobs.removeAt(row);
449
 
     setActionsEnabled();
450
 
 
451
 
     saveChanges = true;
452
 
     saveSettings();
453
 
 }
454
 
 
455
 
 void MainWindow::torrentStopped()
456
 
 {
457
 
     <span class="comment">// Schedule the client for deletion.</span>
458
 
     TorrentClient *client = qobject_cast&lt;TorrentClient *&gt;(sender());
459
 
     client-&gt;deleteLater();
460
 
 
461
 
     <span class="comment">// If the quit dialog is shown, update its progress.</span>
462
 
     if (quitDialog) {
463
 
         if (++jobsStopped == jobsToStop)
464
 
             quitDialog-&gt;close();
465
 
     }
466
 
 }
467
 
 
468
 
 void MainWindow::torrentError(TorrentClient::Error)
469
 
 {
470
 
     <span class="comment">// Delete the client.</span>
471
 
     TorrentClient *client = qobject_cast&lt;TorrentClient *&gt;(sender());
472
 
     int row = rowOfClient(client);
473
 
     QString fileName = jobs.at(row).torrentFileName;
474
 
     jobs.removeAt(row);
475
 
 
476
 
     <span class="comment">// Display the warning.</span>
477
 
     QMessageBox::warning(this, tr(&quot;Error&quot;),
478
 
                          tr(&quot;An error occurred while downloading %0: %1&quot;)
479
 
                          .arg(fileName)
480
 
                          .arg(client-&gt;errorString()));
481
 
 
482
 
     delete torrentView-&gt;takeTopLevelItem(row);
483
 
     client-&gt;deleteLater();
484
 
 }
485
 
 
486
 
 bool MainWindow::addTorrent(const QString &amp;fileName, const QString &amp;destinationFolder,
487
 
                             const QByteArray &amp;resumeState)
488
 
 {
489
 
     <span class="comment">// Check if the torrent is already being downloaded.</span>
490
 
     foreach (Job job, jobs) {
491
 
         if (job.torrentFileName == fileName &amp;&amp; job.destinationDirectory == destinationFolder) {
492
 
             QMessageBox::warning(this, tr(&quot;Already downloading&quot;),
493
 
                                  tr(&quot;The torrent file %1 is &quot;
494
 
                                     &quot;already being downloaded.&quot;).arg(fileName));
495
 
             return false;
496
 
         }
497
 
     }
498
 
 
499
 
     <span class="comment">// Create a new torrent client and attempt to parse the torrent data.</span>
500
 
     TorrentClient *client = new TorrentClient(this);
501
 
     if (!client-&gt;setTorrent(fileName)) {
502
 
         QMessageBox::warning(this, tr(&quot;Error&quot;),
503
 
                              tr(&quot;The torrent file %1 cannot not be opened/resumed.&quot;).arg(fileName));
504
 
         delete client;
505
 
         return false;
506
 
     }
507
 
     client-&gt;setDestinationFolder(destinationFolder);
508
 
     client-&gt;setDumpedState(resumeState);
509
 
 
510
 
     <span class="comment">// Setup the client connections.</span>
511
 
     connect(client, SIGNAL(stateChanged(TorrentClient::State)), this, SLOT(updateState(TorrentClient::State)));
512
 
     connect(client, SIGNAL(peerInfoUpdated()), this, SLOT(updatePeerInfo()));
513
 
     connect(client, SIGNAL(progressUpdated(int)), this, SLOT(updateProgress(int)));
514
 
     connect(client, SIGNAL(downloadRateUpdated(int)), this, SLOT(updateDownloadRate(int)));
515
 
     connect(client, SIGNAL(uploadRateUpdated(int)), this, SLOT(updateUploadRate(int)));
516
 
     connect(client, SIGNAL(stopped()), this, SLOT(torrentStopped()));
517
 
     connect(client, SIGNAL(error(TorrentClient::Error)), this, SLOT(torrentError(TorrentClient::Error)));
518
 
 
519
 
     <span class="comment">// Add the client to the list of downloading jobs.</span>
520
 
     Job job;
521
 
     job.client = client;
522
 
     job.torrentFileName = fileName;
523
 
     job.destinationDirectory = destinationFolder;
524
 
     jobs &lt;&lt; job;
525
 
 
526
 
     <span class="comment">// Create and add a row in the torrent view for this download.</span>
527
 
     QTreeWidgetItem *item = new QTreeWidgetItem(torrentView);
528
 
 
529
 
     QString baseFileName = QFileInfo(fileName).fileName();
530
 
     if (baseFileName.toLower().endsWith(&quot;.torrent&quot;))
531
 
         baseFileName.remove(baseFileName.size() - 8);
532
 
 
533
 
     item-&gt;setText(0, baseFileName);
534
 
     item-&gt;setToolTip(0, tr(&quot;Torrent: %1&lt;br&gt;Destination: %2&quot;)
535
 
                      .arg(baseFileName).arg(destinationFolder));
536
 
     item-&gt;setText(1, tr(&quot;0/0&quot;));
537
 
     item-&gt;setText(2, &quot;0&quot;);
538
 
     item-&gt;setText(3, &quot;0.0 KB/s&quot;);
539
 
     item-&gt;setText(4, &quot;0.0 KB/s&quot;);
540
 
     item-&gt;setText(5, tr(&quot;Idle&quot;));
541
 
     item-&gt;setFlags(item-&gt;flags() &amp; ~Qt::ItemIsEditable);
542
 
     item-&gt;setTextAlignment(1, Qt::AlignHCenter);
543
 
 
544
 
     if (!saveChanges) {
545
 
         saveChanges = true;
546
 
         QTimer::singleShot(5000, this, SLOT(saveSettings()));
547
 
     }
548
 
     client-&gt;start();
549
 
     return true;
550
 
 }
551
 
 
552
 
 void MainWindow::saveSettings()
553
 
 {
554
 
     if (!saveChanges)
555
 
       return;
556
 
     saveChanges = false;
557
 
 
558
 
     <span class="comment">// Prepare and reset the settings</span>
559
 
     QSettings settings(&quot;Trolltech&quot;, &quot;Torrent&quot;);
560
 
     settings.clear();
561
 
 
562
 
     settings.setValue(&quot;LastDirectory&quot;, lastDirectory);
563
 
     settings.setValue(&quot;UploadLimit&quot;, uploadLimitSlider-&gt;value());
564
 
     settings.setValue(&quot;DownloadLimit&quot;, downloadLimitSlider-&gt;value());
565
 
 
566
 
     <span class="comment">// Store data on all known torrents</span>
567
 
     settings.beginWriteArray(&quot;Torrents&quot;);
568
 
     for (int i = 0; i &lt; jobs.size(); ++i) {
569
 
         settings.setArrayIndex(i);
570
 
         settings.setValue(&quot;sourceFileName&quot;, jobs.at(i).torrentFileName);
571
 
         settings.setValue(&quot;destinationFolder&quot;, jobs.at(i).destinationDirectory);
572
 
         settings.setValue(&quot;uploadedBytes&quot;, jobs.at(i).client-&gt;uploadedBytes());
573
 
         settings.setValue(&quot;downloadedBytes&quot;, jobs.at(i).client-&gt;downloadedBytes());
574
 
         settings.setValue(&quot;resumeState&quot;, jobs.at(i).client-&gt;dumpedState());
575
 
     }
576
 
     settings.endArray();
577
 
     settings.sync();
578
 
 }
579
 
 
580
 
 void MainWindow::updateState(TorrentClient::State)
581
 
 {
582
 
     <span class="comment">// Update the state string whenever the client's state changes.</span>
583
 
     TorrentClient *client = qobject_cast&lt;TorrentClient *&gt;(sender());
584
 
     int row = rowOfClient(client);
585
 
     QTreeWidgetItem *item = torrentView-&gt;topLevelItem(row);
586
 
     if (item) {
587
 
         item-&gt;setToolTip(0, tr(&quot;Torrent: %1&lt;br&gt;Destination: %2&lt;br&gt;State: %3&quot;)
588
 
                          .arg(jobs.at(row).torrentFileName)
589
 
                          .arg(jobs.at(row).destinationDirectory)
590
 
                          .arg(client-&gt;stateString()));
591
 
 
592
 
         item-&gt;setText(5, client-&gt;stateString());
593
 
     }
594
 
     setActionsEnabled();
595
 
 }
596
 
 
597
 
 void MainWindow::updatePeerInfo()
598
 
 {
599
 
     <span class="comment">// Update the number of connected, visited, seed and leecher peers.</span>
600
 
     TorrentClient *client = qobject_cast&lt;TorrentClient *&gt;(sender());
601
 
     int row = rowOfClient(client);
602
 
 
603
 
     QTreeWidgetItem *item = torrentView-&gt;topLevelItem(row);
604
 
     item-&gt;setText(1, tr(&quot;%1/%2&quot;).arg(client-&gt;connectedPeerCount())
605
 
                   .arg(client-&gt;seedCount()));
606
 
 }
607
 
 
608
 
 void MainWindow::updateProgress(int percent)
609
 
 {
610
 
     TorrentClient *client = qobject_cast&lt;TorrentClient *&gt;(sender());
611
 
     int row = rowOfClient(client);
612
 
 
613
 
     <span class="comment">// Update the progressbar.</span>
614
 
     QTreeWidgetItem *item = torrentView-&gt;topLevelItem(row);
615
 
     if (item)
616
 
         item-&gt;setText(2, QString::number(percent));
617
 
 }
618
 
 
619
 
 void MainWindow::setActionsEnabled()
620
 
 {
621
 
     <span class="comment">// Find the view item and client for the current row, and update</span>
622
 
     <span class="comment">// the states of the actions.</span>
623
 
     QTreeWidgetItem *item = 0;
624
 
     if (!torrentView-&gt;selectedItems().isEmpty())
625
 
         item = torrentView-&gt;selectedItems().first();
626
 
     TorrentClient *client = item ? jobs.at(torrentView-&gt;indexOfTopLevelItem(item)).client : 0;
627
 
     bool pauseEnabled = client &amp;&amp; ((client-&gt;state() == TorrentClient::Paused)
628
 
                                        ||  (client-&gt;state() &gt; TorrentClient::Preparing));
629
 
 
630
 
     removeTorrentAction-&gt;setEnabled(item != 0);
631
 
     pauseTorrentAction-&gt;setEnabled(item != 0 &amp;&amp; pauseEnabled);
632
 
 
633
 
     if (client &amp;&amp; client-&gt;state() == TorrentClient::Paused) {
634
 
         pauseTorrentAction-&gt;setIcon(QIcon(&quot;:/icons/player_play.png&quot;));
635
 
         pauseTorrentAction-&gt;setText(tr(&quot;Resume torrent&quot;));
636
 
     } else {
637
 
         pauseTorrentAction-&gt;setIcon(QIcon(&quot;:/icons/player_pause.png&quot;));
638
 
         pauseTorrentAction-&gt;setText(tr(&quot;Pause torrent&quot;));
639
 
     }
640
 
 
641
 
     int row = torrentView-&gt;indexOfTopLevelItem(item);
642
 
     upActionTool-&gt;setEnabled(item &amp;&amp; row != 0);
643
 
     downActionTool-&gt;setEnabled(item &amp;&amp; row != jobs.size() - 1);
644
 
 }
645
 
 
646
 
 void MainWindow::updateDownloadRate(int bytesPerSecond)
647
 
 {
648
 
     <span class="comment">// Update the download rate.</span>
649
 
     TorrentClient *client = qobject_cast&lt;TorrentClient *&gt;(sender());
650
 
     int row = rowOfClient(client);
651
 
     QString num;
652
 
     num.sprintf(&quot;%.1f KB/s&quot;, bytesPerSecond / 1024.0);
653
 
     torrentView-&gt;topLevelItem(row)-&gt;setText(3, num);
654
 
 
655
 
     if (!saveChanges) {
656
 
         saveChanges = true;
657
 
         QTimer::singleShot(5000, this, SLOT(saveSettings()));
658
 
     }
659
 
 }
660
 
 
661
 
 void MainWindow::updateUploadRate(int bytesPerSecond)
662
 
 {
663
 
     <span class="comment">// Update the upload rate.</span>
664
 
     TorrentClient *client = qobject_cast&lt;TorrentClient *&gt;(sender());
665
 
     int row = rowOfClient(client);
666
 
     QString num;
667
 
     num.sprintf(&quot;%.1f KB/s&quot;, bytesPerSecond / 1024.0);
668
 
     torrentView-&gt;topLevelItem(row)-&gt;setText(4, num);
669
 
 
670
 
     if (!saveChanges) {
671
 
         saveChanges = true;
672
 
         QTimer::singleShot(5000, this, SLOT(saveSettings()));
673
 
     }
674
 
 }
675
 
 
676
 
 void MainWindow::pauseTorrent()
677
 
 {
678
 
     <span class="comment">// Pause or unpause the current torrent.</span>
679
 
     int row = torrentView-&gt;indexOfTopLevelItem(torrentView-&gt;currentItem());
680
 
     TorrentClient *client = jobs.at(row).client;
681
 
     client-&gt;setPaused(client-&gt;state() != TorrentClient::Paused);
682
 
     setActionsEnabled();
683
 
 }
684
 
 
685
 
 void MainWindow::moveTorrentUp()
686
 
 {
687
 
     QTreeWidgetItem *item = torrentView-&gt;currentItem();
688
 
     int row = torrentView-&gt;indexOfTopLevelItem(item);
689
 
     if (row == 0)
690
 
         return;
691
 
 
692
 
     Job tmp = jobs.at(row - 1);
693
 
     jobs[row - 1] = jobs[row];
694
 
     jobs[row] = tmp;
695
 
 
696
 
     QTreeWidgetItem *itemAbove = torrentView-&gt;takeTopLevelItem(row - 1);
697
 
     torrentView-&gt;insertTopLevelItem(row, itemAbove);
698
 
     setActionsEnabled();
699
 
 }
700
 
 
701
 
 void MainWindow::moveTorrentDown()
702
 
 {
703
 
     QTreeWidgetItem *item = torrentView-&gt;currentItem();
704
 
     int row = torrentView-&gt;indexOfTopLevelItem(item);
705
 
     if (row == jobs.size() - 1)
706
 
         return;
707
 
 
708
 
     Job tmp = jobs.at(row + 1);
709
 
     jobs[row + 1] = jobs[row];
710
 
     jobs[row] = tmp;
711
 
 
712
 
     QTreeWidgetItem *itemAbove = torrentView-&gt;takeTopLevelItem(row + 1);
713
 
     torrentView-&gt;insertTopLevelItem(row, itemAbove);
714
 
     setActionsEnabled();
715
 
 }
716
 
 
717
 
 static int rateFromValue(int value)
718
 
 {
719
 
     int rate = 0;
720
 
     if (value &gt;= 0 &amp;&amp; value &lt; 250) {
721
 
         rate = 1 + int(value * 0.124);
722
 
     } else if (value &lt; 500) {
723
 
         rate = 32 + int((value - 250) * 0.384);
724
 
     } else if (value &lt; 750) {
725
 
         rate = 128 + int((value - 500) * 1.536);
726
 
     } else {
727
 
         rate = 512 + int((value - 750) * 6.1445);
728
 
     }
729
 
     return rate;
730
 
 }
731
 
 
732
 
 void MainWindow::setUploadLimit(int value)
733
 
 {
734
 
     int rate = rateFromValue(value);
735
 
     uploadLimitLabel-&gt;setText(tr(&quot;%1 KB/s&quot;).arg(QString().sprintf(&quot;%4d&quot;, rate)));
736
 
     RateController::instance()-&gt;setUploadLimit(rate * 1024);
737
 
 }
738
 
 
739
 
 void MainWindow::setDownloadLimit(int value)
740
 
 {
741
 
     int rate = rateFromValue(value);
742
 
     downloadLimitLabel-&gt;setText(tr(&quot;%1 KB/s&quot;).arg(QString().sprintf(&quot;%4d&quot;, rate)));
743
 
     RateController::instance()-&gt;setDownloadLimit(rate * 1024);
744
 
 }
745
 
 
746
 
 void MainWindow::about()
747
 
 {
748
 
     QLabel *icon = new QLabel;
749
 
     icon-&gt;setPixmap(QPixmap(&quot;:/icons/peertopeer.png&quot;));
750
 
 
751
 
     QLabel *text = new QLabel;
752
 
     text-&gt;setWordWrap(true);
753
 
     text-&gt;setText(&quot;&lt;p&gt;The &lt;b&gt;Torrent Client&lt;/b&gt; example demonstrates how to&quot;
754
 
                   &quot; write a complete peer-to-peer file sharing&quot;
755
 
                   &quot; application using Qt's network and thread classes.&lt;/p&gt;&quot;
756
 
                   &quot;&lt;p&gt;This feature complete client implementation of&quot;
757
 
                   &quot; the BitTorrent protocol can efficiently&quot;
758
 
                   &quot; maintain several hundred network connections&quot;
759
 
                   &quot; simultaneously.&lt;/p&gt;&quot;);
760
 
 
761
 
     QPushButton *quitButton = new QPushButton(&quot;OK&quot;);
762
 
 
763
 
     QHBoxLayout *topLayout = new QHBoxLayout;
764
 
     topLayout-&gt;setMargin(10);
765
 
     topLayout-&gt;setSpacing(10);
766
 
     topLayout-&gt;addWidget(icon);
767
 
     topLayout-&gt;addWidget(text);
768
 
 
769
 
     QHBoxLayout *bottomLayout = new QHBoxLayout;
770
 
     bottomLayout-&gt;addStretch();
771
 
     bottomLayout-&gt;addWidget(quitButton);
772
 
     bottomLayout-&gt;addStretch();
773
 
 
774
 
     QVBoxLayout *mainLayout = new QVBoxLayout;
775
 
     mainLayout-&gt;addLayout(topLayout);
776
 
     mainLayout-&gt;addLayout(bottomLayout);
777
 
 
778
 
     QDialog about(this);
779
 
     about.setModal(true);
780
 
     about.setWindowTitle(tr(&quot;About Torrent Client&quot;));
781
 
     about.setLayout(mainLayout);
782
 
 
783
 
     connect(quitButton, SIGNAL(clicked()), &amp;about, SLOT(close()));
784
 
 
785
 
     about.exec();
786
 
 }
787
 
 
788
 
 void MainWindow::acceptFileDrop(const QString &amp;fileName)
789
 
 {
790
 
     <span class="comment">// Create and show the &quot;Add Torrent&quot; dialog.</span>
791
 
     AddTorrentDialog *addTorrentDialog = new AddTorrentDialog;
792
 
     lastDirectory = QFileInfo(fileName).absolutePath();
793
 
     addTorrentDialog-&gt;setTorrent(fileName);
794
 
     addTorrentDialog-&gt;deleteLater();
795
 
     if (!addTorrentDialog-&gt;exec())
796
 
         return;
797
 
 
798
 
     <span class="comment">// Add the torrent to our list of downloads.</span>
799
 
     addTorrent(fileName, addTorrentDialog-&gt;destinationFolder());
800
 
     saveSettings();
801
 
 }
802
 
 
803
 
 void MainWindow::closeEvent(QCloseEvent *)
804
 
 {
805
 
     if (jobs.isEmpty())
806
 
         return;
807
 
 
808
 
     <span class="comment">// Save upload / download numbers.</span>
809
 
     saveSettings();
810
 
     saveChanges = false;
811
 
 
812
 
     quitDialog = new QProgressDialog(tr(&quot;Disconnecting from trackers&quot;), tr(&quot;Abort&quot;), 0, jobsToStop, this);
813
 
 
814
 
     <span class="comment">// Stop all clients, remove the rows from the view and wait for</span>
815
 
     <span class="comment">// them to signal that they have stopped.</span>
816
 
     jobsToStop = 0;
817
 
     jobsStopped = 0;
818
 
     foreach (Job job, jobs) {
819
 
         ++jobsToStop;
820
 
         TorrentClient *client = job.client;
821
 
         client-&gt;disconnect();
822
 
         connect(client, SIGNAL(stopped()), this, SLOT(torrentStopped()));
823
 
         client-&gt;stop();
824
 
         delete torrentView-&gt;takeTopLevelItem(0);
825
 
     }
826
 
 
827
 
     if (jobsToStop &gt; jobsStopped)
828
 
         quitDialog-&gt;exec();
829
 
     quitDialog-&gt;deleteLater();
830
 
     quitDialog = 0;
831
 
 }
832
 
 
833
 
 TorrentView::TorrentView(QWidget *parent)
834
 
     : QTreeWidget(parent)
835
 
 {
836
 
     setAcceptDrops(true);
837
 
 }
838
 
 
839
 
 void TorrentView::dragMoveEvent(QDragMoveEvent *event)
840
 
 {
841
 
     <span class="comment">// Accept file actions with a '.torrent' extension.</span>
842
 
     QUrl url(event-&gt;mimeData()-&gt;text());
843
 
     if (url.isValid() &amp;&amp; url.scheme().toLower() == &quot;file&quot;
844
 
             &amp;&amp; url.path().toLower().endsWith(&quot;.torrent&quot;))
845
 
         event-&gt;acceptProposedAction();
846
 
 }
847
 
 
848
 
 void TorrentView::dropEvent(QDropEvent *event)
849
 
 {
850
 
     <span class="comment">// Accept drops if the file has a '.torrent' extension and it</span>
851
 
     <span class="comment">// exists.</span>
852
 
     QString fileName = QUrl(event-&gt;mimeData()-&gt;text()).path();
853
 
     if (QFile::exists(fileName) &amp;&amp; fileName.toLower().endsWith(&quot;.torrent&quot;))
854
 
         emit fileDropped(fileName);
855
 
 }
856
 
 
857
 
 #include &quot;mainwindow.moc&quot;</pre>
858
 
</div>
859
 
<!-- @@@network/torrent/mainwindow.cpp -->
860
 
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861
 
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863
 
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865
 
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866
 
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867
 
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868
 
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869
 
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870
 
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871
 
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872
 
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873
 
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875
 
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877
 
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878
 
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879
 
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880
 
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881
 
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882
 
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883
 
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