C++ Playlist::mediaPlaylist方法代码示例

/** Add a new playlist tab. */
Playlist* TabPlaylist::addPlaylist()
{
	QString newPlaylistName = tr("Playlist %1").arg(count() + 1);
	QByteArray ba;
	if (playlists().isEmpty()) {
		ba = SettingsPrivate::instance()->lastActivePlaylistGeometry();
	} else {
		ba = currentPlayList()->horizontalHeader()->saveState();
	}

	// Then append a new empty playlist to the others
	Playlist *p = new Playlist(_mediaPlayer, this);
	p->installEventFilter(this);
	if (!ba.isEmpty()) {
		p->horizontalHeader()->restoreState(ba);
	}

	// Always create an icon in Disabled mode. It will be enabled when one will provide some tracks
	int i = addTab(p, newPlaylistName);
	this->setTabIcon(i, this->defaultIcon(QIcon::Disabled));

	connect(p->mediaPlaylist(), &QMediaPlaylist::mediaRemoved, this, [=](int start, int) {
		if (_mediaPlayer.data()->playlist() == p->mediaPlaylist() && p->mediaPlaylist()->currentIndex() == start) {
			_mediaPlayer.data()->stop();
		}
	});

	// Forward from inner class to MainWindow the signals
	connect(p, &Playlist::aboutToSendToTagEditor, this, &TabPlaylist::aboutToSendToTagEditor);
	connect(p, &Playlist::selectionChanged, this, &TabPlaylist::selectionChanged);

	// Check if tab icon should indicate that playlist has changed or not
	connect(p, &Playlist::contentHasChanged, this, [=]() {
		int playlistTabIndex = -1;
		for (int i = 0; i < playlists().count(); i++) {
			if (p == playlist(i)) {
				playlistTabIndex = i;
				break;
			}
		}
		if (playlistTabIndex != -1) {
			if (p->hash() != p->generateNewHash()) {
				this->setTabIcon(playlistTabIndex, this->defaultIcon(QIcon::Normal));
			}
		}
	});

	// Select the new empty playlist
	setCurrentIndex(i);
	uint hash = qHash(p);
	this->tabBar()->setTabData(i, hash);
	emit playlistCreated();
	return p;
}

void PlaylistDialog::populatePreviewFromUnsaved(const QItemSelection &, const QItemSelection &)
{
	static const int MAX_TRACKS_PREVIEW_AREA = 30;
	bool b = unsavedPlaylists->selectionModel()->selectedIndexes().size() == 1;
	this->clearPreview(b);
	if (b) {
		QStandardItem *item = _unsavedPlaylistModel->itemFromIndex(unsavedPlaylists->selectionModel()->selectedIndexes().first());
		Playlist *p = _unsaved.value(item);
		int max = qMin(p->mediaPlaylist()->mediaCount(), MAX_TRACKS_PREVIEW_AREA);
		for (int idxTrack = 0; idxTrack < max; idxTrack++) {
			QString title = p->model()->index(idxTrack, Playlist::COL_TITLE).data().toString();
			QString artist = p->model()->index(idxTrack, Playlist::COL_ARTIST).data().toString();
			QString album = p->model()->index(idxTrack, Playlist::COL_ALBUM).data().toString();
			QTreeWidgetItem *item = new QTreeWidgetItem;
			item->setText(0, QString("%1 (%2 - %3)").arg(title, artist, album));
			previewPlaylist->addTopLevelItem(item);
		}
		if (p->mediaPlaylist()->mediaCount() > MAX_TRACKS_PREVIEW_AREA) {
			QTreeWidgetItem *item = new QTreeWidgetItem;
			item->setText(0, tr("And more tracks..."));
			previewPlaylist->addTopLevelItem(item);
		}
	}
}

/** Redefined: clean preview area, populate once again lists. */
void PlaylistDialog::open()
{
	SettingsPrivate *settings = SettingsPrivate::instance();
	if (settings->value("PlaylistDialogGeometry").isValid()) {
		this->restoreGeometry(settings->value("PlaylistDialogGeometry").toByteArray());
	}
	this->clearPreview(false);

	for (int i = 0; i < _playlists.count(); i++) {
		Playlist *p = _playlists.at(i);
		if (p && p->id() == 0 && !p->mediaPlaylist()->isEmpty()) {
			QStandardItem *item = new QStandardItem(p->title());
			_unsavedPlaylistModel->appendRow(item);
			_unsaved.insert(item, p);
		}
	}
	this->updatePlaylists();

	QDialog::open();
	this->activateWindow();
}