diff -r 000000000000 -r 1918ee327afb examples/phonon/qmusicplayer/mainwindow.cpp --- /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 + +#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 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"); +} +