/**************************************************************************** ** ** Copyright (C) 2011 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. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ** the names of its contributors may be used to endorse or promote ** products derived from this software without specific prior written ** permission. ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** $QT_END_LICENSE$ ** ***************************************************************************/ #include <QtGui> #include "mainwindow.h" MainWindow::MainWindow() { audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory, this); mediaObject = new Phonon::MediaObject(this); metaInformationResolver = new Phonon::MediaObject(this); mediaObject->setTickInterval(1000); 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(Phonon::MediaSource)), this, SLOT(sourceChanged(Phonon::MediaSource))); connect(mediaObject, SIGNAL(aboutToFinish()), this, SLOT(aboutToFinish())); Phonon::createPath(mediaObject, audioOutput); setupActions(); setupMenus(); setupUi(); timeLcd->display("00:00"); } 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)); } 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.")); } 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; 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; case Phonon::BufferingState: break; default: ; } } void MainWindow::tick(qint64 time) { QTime displayTime(0, (time / 60000) % 60, (time / 1000) % 60); timeLcd->display(displayTime.toString("mm:ss")); } 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(); } void MainWindow::sourceChanged(const Phonon::MediaSource &source) { musicTable->selectRow(sources.indexOf(source)); timeLcd->display("00:00"); } 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); 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); 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); } } void MainWindow::aboutToFinish() { int index = sources.indexOf(mediaObject->currentSource()) + 1; if (sources.size() > index) { mediaObject->enqueue(sources.at(index)); } } void MainWindow::setupActions() { playAction = new QAction(style()->standardIcon(QStyle::SP_MediaPlay), tr("Play"), this); playAction->setShortcut(tr("Ctrl+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")); connect(playAction, SIGNAL(triggered()), mediaObject, SLOT(play())); connect(pauseAction, SIGNAL(triggered()), mediaObject, SLOT(pause()) ); connect(stopAction, SIGNAL(triggered()), mediaObject, SLOT(stop())); 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); } void MainWindow::setupUi() { QToolBar *bar = new QToolBar; bar->addAction(playAction); bar->addAction(pauseAction); bar->addAction(stopAction); seekSlider = new Phonon::SeekSlider(this); seekSlider->setMediaObject(mediaObject); volumeSlider = new Phonon::VolumeSlider(this); volumeSlider->setAudioOutput(audioOutput); 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"); }
© 2008-2011 Nokia Corporation and/or its subsidiaries. Nokia, Qt and their respective logos are trademarks of Nokia Corporation in Finland and/or other countries worldwide.
All other trademarks are property of their respective owners. Privacy Policy
Licensees holding valid Qt Commercial licenses may use this document in accordance with the Qt Commercial License Agreement provided with the Software or, alternatively, in accordance with the terms contained in a written agreement between you and Nokia.
Alternatively, this document may be used under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation.