--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/phonon/qmusicplayer/mainwindow.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,355 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+***************************************************************************/
+
+#include <QtGui>
+
+#include "mainwindow.h"
+
+//![0]
+MainWindow::MainWindow()
+{
+ audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory, this);
+ mediaObject = new Phonon::MediaObject(this);
+ metaInformationResolver = new Phonon::MediaObject(this);
+
+ mediaObject->setTickInterval(1000);
+//![0]
+//![2]
+ connect(mediaObject, SIGNAL(tick(qint64)), this, SLOT(tick(qint64)));
+ connect(mediaObject, SIGNAL(stateChanged(Phonon::State, Phonon::State)),
+ this, SLOT(stateChanged(Phonon::State, Phonon::State)));
+ connect(metaInformationResolver, SIGNAL(stateChanged(Phonon::State,Phonon::State)),
+ this, SLOT(metaStateChanged(Phonon::State, Phonon::State)));
+ connect(mediaObject, SIGNAL(currentSourceChanged(const Phonon::MediaSource &)),
+ this, SLOT(sourceChanged(const Phonon::MediaSource &)));
+ connect(mediaObject, SIGNAL(aboutToFinish()), this, SLOT(aboutToFinish()));
+//![2]
+
+//![1]
+ Phonon::createPath(mediaObject, audioOutput);
+//![1]
+
+ setupActions();
+ setupMenus();
+ setupUi();
+ timeLcd->display("00:00");
+}
+
+//![6]
+void MainWindow::addFiles()
+{
+ QStringList files = QFileDialog::getOpenFileNames(this, tr("Select Music Files"),
+ QDesktopServices::storageLocation(QDesktopServices::MusicLocation));
+
+ if (files.isEmpty())
+ return;
+
+ int index = sources.size();
+ foreach (QString string, files) {
+ Phonon::MediaSource source(string);
+
+ sources.append(source);
+ }
+ if (!sources.isEmpty())
+ metaInformationResolver->setCurrentSource(sources.at(index));
+
+}
+//![6]
+
+void MainWindow::about()
+{
+ QMessageBox::information(this, tr("About Music Player"),
+ tr("The Music Player example shows how to use Phonon - the multimedia"
+ " framework that comes with Qt - to create a simple music player."));
+}
+
+//![9]
+void MainWindow::stateChanged(Phonon::State newState, Phonon::State /* oldState */)
+{
+ switch (newState) {
+ case Phonon::ErrorState:
+ if (mediaObject->errorType() == Phonon::FatalError) {
+ QMessageBox::warning(this, tr("Fatal Error"),
+ mediaObject->errorString());
+ } else {
+ QMessageBox::warning(this, tr("Error"),
+ mediaObject->errorString());
+ }
+ break;
+//![9]
+//![10]
+ case Phonon::PlayingState:
+ playAction->setEnabled(false);
+ pauseAction->setEnabled(true);
+ stopAction->setEnabled(true);
+ break;
+ case Phonon::StoppedState:
+ stopAction->setEnabled(false);
+ playAction->setEnabled(true);
+ pauseAction->setEnabled(false);
+ timeLcd->display("00:00");
+ break;
+ case Phonon::PausedState:
+ pauseAction->setEnabled(false);
+ stopAction->setEnabled(true);
+ playAction->setEnabled(true);
+ break;
+//![10]
+ case Phonon::BufferingState:
+ break;
+ default:
+ ;
+ }
+}
+
+//![11]
+void MainWindow::tick(qint64 time)
+{
+ QTime displayTime(0, (time / 60000) % 60, (time / 1000) % 60);
+
+ timeLcd->display(displayTime.toString("mm:ss"));
+}
+//![11]
+
+//![12]
+void MainWindow::tableClicked(int row, int /* column */)
+{
+ bool wasPlaying = mediaObject->state() == Phonon::PlayingState;
+
+ mediaObject->stop();
+ mediaObject->clearQueue();
+
+ if (row >= sources.size())
+ return;
+
+ mediaObject->setCurrentSource(sources[row]);
+
+ if (wasPlaying)
+ mediaObject->play();
+ else
+ mediaObject->stop();
+}
+//![12]
+
+//![13]
+void MainWindow::sourceChanged(const Phonon::MediaSource &source)
+{
+ musicTable->selectRow(sources.indexOf(source));
+ timeLcd->display("00:00");
+}
+//![13]
+
+//![14]
+void MainWindow::metaStateChanged(Phonon::State newState, Phonon::State /* oldState */)
+{
+ if (newState == Phonon::ErrorState) {
+ QMessageBox::warning(this, tr("Error opening files"),
+ metaInformationResolver->errorString());
+ while (!sources.isEmpty() &&
+ !(sources.takeLast() == metaInformationResolver->currentSource())) {} /* loop */;
+ return;
+ }
+
+ if (newState != Phonon::StoppedState && newState != Phonon::PausedState)
+ return;
+
+ if (metaInformationResolver->currentSource().type() == Phonon::MediaSource::Invalid)
+ return;
+
+ QMap<QString, QString> metaData = metaInformationResolver->metaData();
+
+ QString title = metaData.value("TITLE");
+ if (title == "")
+ title = metaInformationResolver->currentSource().fileName();
+
+ QTableWidgetItem *titleItem = new QTableWidgetItem(title);
+ titleItem->setFlags(titleItem->flags() ^ Qt::ItemIsEditable);
+ QTableWidgetItem *artistItem = new QTableWidgetItem(metaData.value("ARTIST"));
+ artistItem->setFlags(artistItem->flags() ^ Qt::ItemIsEditable);
+ QTableWidgetItem *albumItem = new QTableWidgetItem(metaData.value("ALBUM"));
+ albumItem->setFlags(albumItem->flags() ^ Qt::ItemIsEditable);
+ QTableWidgetItem *yearItem = new QTableWidgetItem(metaData.value("DATE"));
+ yearItem->setFlags(yearItem->flags() ^ Qt::ItemIsEditable);
+//![14]
+
+ int currentRow = musicTable->rowCount();
+ musicTable->insertRow(currentRow);
+ musicTable->setItem(currentRow, 0, titleItem);
+ musicTable->setItem(currentRow, 1, artistItem);
+ musicTable->setItem(currentRow, 2, albumItem);
+ musicTable->setItem(currentRow, 3, yearItem);
+
+//![15]
+ if (musicTable->selectedItems().isEmpty()) {
+ musicTable->selectRow(0);
+ mediaObject->setCurrentSource(metaInformationResolver->currentSource());
+ }
+
+ Phonon::MediaSource source = metaInformationResolver->currentSource();
+ int index = sources.indexOf(metaInformationResolver->currentSource()) + 1;
+ if (sources.size() > index) {
+ metaInformationResolver->setCurrentSource(sources.at(index));
+ }
+ else {
+ musicTable->resizeColumnsToContents();
+ if (musicTable->columnWidth(0) > 300)
+ musicTable->setColumnWidth(0, 300);
+ }
+}
+//![15]
+
+//![16]
+void MainWindow::aboutToFinish()
+{
+ int index = sources.indexOf(mediaObject->currentSource()) + 1;
+ if (sources.size() > index) {
+ mediaObject->enqueue(sources.at(index));
+ }
+}
+//![16]
+
+void MainWindow::setupActions()
+{
+ playAction = new QAction(style()->standardIcon(QStyle::SP_MediaPlay), tr("Play"), this);
+ playAction->setShortcut(tr("Crl+P"));
+ playAction->setDisabled(true);
+ pauseAction = new QAction(style()->standardIcon(QStyle::SP_MediaPause), tr("Pause"), this);
+ pauseAction->setShortcut(tr("Ctrl+A"));
+ pauseAction->setDisabled(true);
+ stopAction = new QAction(style()->standardIcon(QStyle::SP_MediaStop), tr("Stop"), this);
+ stopAction->setShortcut(tr("Ctrl+S"));
+ stopAction->setDisabled(true);
+ nextAction = new QAction(style()->standardIcon(QStyle::SP_MediaSkipForward), tr("Next"), this);
+ nextAction->setShortcut(tr("Ctrl+N"));
+ previousAction = new QAction(style()->standardIcon(QStyle::SP_MediaSkipBackward), tr("Previous"), this);
+ previousAction->setShortcut(tr("Ctrl+R"));
+ addFilesAction = new QAction(tr("Add &Files"), this);
+ addFilesAction->setShortcut(tr("Ctrl+F"));
+ exitAction = new QAction(tr("E&xit"), this);
+ exitAction->setShortcuts(QKeySequence::Quit);
+ aboutAction = new QAction(tr("A&bout"), this);
+ aboutAction->setShortcut(tr("Ctrl+B"));
+ aboutQtAction = new QAction(tr("About &Qt"), this);
+ aboutQtAction->setShortcut(tr("Ctrl+Q"));
+
+//![5]
+ connect(playAction, SIGNAL(triggered()), mediaObject, SLOT(play()));
+ connect(pauseAction, SIGNAL(triggered()), mediaObject, SLOT(pause()) );
+ connect(stopAction, SIGNAL(triggered()), mediaObject, SLOT(stop()));
+//![5]
+ connect(addFilesAction, SIGNAL(triggered()), this, SLOT(addFiles()));
+ connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
+ connect(aboutAction, SIGNAL(triggered()), this, SLOT(about()));
+ connect(aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+
+void MainWindow::setupMenus()
+{
+ QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
+ fileMenu->addAction(addFilesAction);
+ fileMenu->addSeparator();
+ fileMenu->addAction(exitAction);
+
+ QMenu *aboutMenu = menuBar()->addMenu(tr("&Help"));
+ aboutMenu->addAction(aboutAction);
+ aboutMenu->addAction(aboutQtAction);
+}
+
+//![3]
+void MainWindow::setupUi()
+{
+//![3]
+ QToolBar *bar = new QToolBar;
+
+ bar->addAction(playAction);
+ bar->addAction(pauseAction);
+ bar->addAction(stopAction);
+
+//![4]
+ seekSlider = new Phonon::SeekSlider(this);
+ seekSlider->setMediaObject(mediaObject);
+
+ volumeSlider = new Phonon::VolumeSlider(this);
+ volumeSlider->setAudioOutput(audioOutput);
+//![4]
+ volumeSlider->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);
+
+ QLabel *volumeLabel = new QLabel;
+ volumeLabel->setPixmap(QPixmap("images/volume.png"));
+
+ QPalette palette;
+ palette.setBrush(QPalette::Light, Qt::darkGray);
+
+ timeLcd = new QLCDNumber;
+ timeLcd->setPalette(palette);
+
+ QStringList headers;
+ headers << tr("Title") << tr("Artist") << tr("Album") << tr("Year");
+
+ musicTable = new QTableWidget(0, 4);
+ musicTable->setHorizontalHeaderLabels(headers);
+ musicTable->setSelectionMode(QAbstractItemView::SingleSelection);
+ musicTable->setSelectionBehavior(QAbstractItemView::SelectRows);
+ connect(musicTable, SIGNAL(cellPressed(int, int)),
+ this, SLOT(tableClicked(int, int)));
+
+ QHBoxLayout *seekerLayout = new QHBoxLayout;
+ seekerLayout->addWidget(seekSlider);
+ seekerLayout->addWidget(timeLcd);
+
+ QHBoxLayout *playbackLayout = new QHBoxLayout;
+ playbackLayout->addWidget(bar);
+ playbackLayout->addStretch();
+ playbackLayout->addWidget(volumeLabel);
+ playbackLayout->addWidget(volumeSlider);
+
+ QVBoxLayout *mainLayout = new QVBoxLayout;
+ mainLayout->addWidget(musicTable);
+ mainLayout->addLayout(seekerLayout);
+ mainLayout->addLayout(playbackLayout);
+
+ QWidget *widget = new QWidget;
+ widget->setLayout(mainLayout);
+
+ setCentralWidget(widget);
+ setWindowTitle("Phonon Music Player");
+}
+