| [556] | 1 | /****************************************************************************
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| 2 | **
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| [846] | 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| [556] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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| [846] | 9 | ** $QT_BEGIN_LICENSE:BSD$
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| 10 | ** You may use this file under the terms of the BSD license as follows:
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| [556] | 11 | **
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| [846] | 12 | ** "Redistribution and use in source and binary forms, with or without
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| 13 | ** modification, are permitted provided that the following conditions are
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| 14 | ** met:
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| 15 | ** * Redistributions of source code must retain the above copyright
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| 16 | ** notice, this list of conditions and the following disclaimer.
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| 17 | ** * Redistributions in binary form must reproduce the above copyright
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| 18 | ** notice, this list of conditions and the following disclaimer in
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| 19 | ** the documentation and/or other materials provided with the
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| 20 | ** distribution.
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| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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| 22 | ** the names of its contributors may be used to endorse or promote
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| 23 | ** products derived from this software without specific prior written
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| 24 | ** permission.
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| [556] | 25 | **
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| [846] | 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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| [556] | 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ***************************************************************************/
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| 40 |
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| 41 | #include <QtGui>
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| 42 |
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| 43 | #include "mainwindow.h"
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| 44 |
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| 45 | //![0]
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| 46 | MainWindow::MainWindow()
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| 47 | {
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| 48 | audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory, this);
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| 49 | mediaObject = new Phonon::MediaObject(this);
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| 50 | metaInformationResolver = new Phonon::MediaObject(this);
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| 51 |
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| 52 | mediaObject->setTickInterval(1000);
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| 53 | //![0]
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| 54 | //![2]
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| 55 | connect(mediaObject, SIGNAL(tick(qint64)), this, SLOT(tick(qint64)));
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| 56 | connect(mediaObject, SIGNAL(stateChanged(Phonon::State,Phonon::State)),
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| 57 | this, SLOT(stateChanged(Phonon::State,Phonon::State)));
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| 58 | connect(metaInformationResolver, SIGNAL(stateChanged(Phonon::State,Phonon::State)),
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| 59 | this, SLOT(metaStateChanged(Phonon::State,Phonon::State)));
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| 60 | connect(mediaObject, SIGNAL(currentSourceChanged(Phonon::MediaSource)),
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| 61 | this, SLOT(sourceChanged(Phonon::MediaSource)));
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| 62 | connect(mediaObject, SIGNAL(aboutToFinish()), this, SLOT(aboutToFinish()));
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| 63 | //![2]
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| 64 |
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| 65 | //![1]
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| 66 | Phonon::createPath(mediaObject, audioOutput);
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| 67 | //![1]
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| 68 |
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| 69 | setupActions();
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| 70 | setupMenus();
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| 71 | setupUi();
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| 72 | timeLcd->display("00:00");
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| 73 | }
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| 74 |
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| 75 | //![6]
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| 76 | void MainWindow::addFiles()
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| 77 | {
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| 78 | QStringList files = QFileDialog::getOpenFileNames(this, tr("Select Music Files"),
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| 79 | QDesktopServices::storageLocation(QDesktopServices::MusicLocation));
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| 80 |
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| 81 | if (files.isEmpty())
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| 82 | return;
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| 83 |
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| 84 | int index = sources.size();
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| 85 | foreach (QString string, files) {
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| 86 | Phonon::MediaSource source(string);
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| 87 |
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| 88 | sources.append(source);
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| 89 | }
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| 90 | if (!sources.isEmpty())
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| 91 | metaInformationResolver->setCurrentSource(sources.at(index));
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| 92 |
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| 93 | }
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| 94 | //![6]
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| 95 |
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| 96 | void MainWindow::about()
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| 97 | {
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| 98 | QMessageBox::information(this, tr("About Music Player"),
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| 99 | tr("The Music Player example shows how to use Phonon - the multimedia"
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| 100 | " framework that comes with Qt - to create a simple music player."));
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| 101 | }
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| 102 |
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| 103 | //![9]
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| 104 | void MainWindow::stateChanged(Phonon::State newState, Phonon::State /* oldState */)
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| 105 | {
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| 106 | switch (newState) {
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| 107 | case Phonon::ErrorState:
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| 108 | if (mediaObject->errorType() == Phonon::FatalError) {
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| 109 | QMessageBox::warning(this, tr("Fatal Error"),
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| 110 | mediaObject->errorString());
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| 111 | } else {
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| 112 | QMessageBox::warning(this, tr("Error"),
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| 113 | mediaObject->errorString());
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| 114 | }
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| 115 | break;
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| 116 | //![9]
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| 117 | //![10]
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| 118 | case Phonon::PlayingState:
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| 119 | playAction->setEnabled(false);
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| 120 | pauseAction->setEnabled(true);
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| 121 | stopAction->setEnabled(true);
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| 122 | break;
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| 123 | case Phonon::StoppedState:
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| 124 | stopAction->setEnabled(false);
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| 125 | playAction->setEnabled(true);
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| 126 | pauseAction->setEnabled(false);
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| 127 | timeLcd->display("00:00");
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| 128 | break;
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| 129 | case Phonon::PausedState:
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| 130 | pauseAction->setEnabled(false);
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| 131 | stopAction->setEnabled(true);
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| 132 | playAction->setEnabled(true);
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| 133 | break;
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| 134 | //![10]
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| 135 | case Phonon::BufferingState:
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| 136 | break;
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| 137 | default:
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| 138 | ;
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| 139 | }
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| 140 | }
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| 141 |
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| 142 | //![11]
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| 143 | void MainWindow::tick(qint64 time)
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| 144 | {
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| 145 | QTime displayTime(0, (time / 60000) % 60, (time / 1000) % 60);
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| 146 |
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| 147 | timeLcd->display(displayTime.toString("mm:ss"));
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| 148 | }
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| 149 | //![11]
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| 150 |
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| 151 | //![12]
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| 152 | void MainWindow::tableClicked(int row, int /* column */)
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| 153 | {
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| 154 | bool wasPlaying = mediaObject->state() == Phonon::PlayingState;
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| 155 |
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| 156 | mediaObject->stop();
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| 157 | mediaObject->clearQueue();
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| 158 |
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| 159 | if (row >= sources.size())
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| 160 | return;
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| 161 |
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| 162 | mediaObject->setCurrentSource(sources[row]);
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| 163 |
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| 164 | if (wasPlaying)
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| 165 | mediaObject->play();
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| 166 | else
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| 167 | mediaObject->stop();
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| 168 | }
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| 169 | //![12]
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| 170 |
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| 171 | //![13]
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| 172 | void MainWindow::sourceChanged(const Phonon::MediaSource &source)
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| 173 | {
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| 174 | musicTable->selectRow(sources.indexOf(source));
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| 175 | timeLcd->display("00:00");
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| 176 | }
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| 177 | //![13]
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| 178 |
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| 179 | //![14]
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| 180 | void MainWindow::metaStateChanged(Phonon::State newState, Phonon::State /* oldState */)
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| 181 | {
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| 182 | if (newState == Phonon::ErrorState) {
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| 183 | QMessageBox::warning(this, tr("Error opening files"),
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| 184 | metaInformationResolver->errorString());
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| 185 | while (!sources.isEmpty() &&
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| 186 | !(sources.takeLast() == metaInformationResolver->currentSource())) {} /* loop */;
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| 187 | return;
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| 188 | }
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| 189 |
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| 190 | if (newState != Phonon::StoppedState && newState != Phonon::PausedState)
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| 191 | return;
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| 192 |
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| 193 | if (metaInformationResolver->currentSource().type() == Phonon::MediaSource::Invalid)
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| 194 | return;
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| 195 |
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| 196 | QMap<QString, QString> metaData = metaInformationResolver->metaData();
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| 197 |
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| 198 | QString title = metaData.value("TITLE");
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| 199 | if (title == "")
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| 200 | title = metaInformationResolver->currentSource().fileName();
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| 201 |
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| 202 | QTableWidgetItem *titleItem = new QTableWidgetItem(title);
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| 203 | titleItem->setFlags(titleItem->flags() ^ Qt::ItemIsEditable);
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| 204 | QTableWidgetItem *artistItem = new QTableWidgetItem(metaData.value("ARTIST"));
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| 205 | artistItem->setFlags(artistItem->flags() ^ Qt::ItemIsEditable);
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| 206 | QTableWidgetItem *albumItem = new QTableWidgetItem(metaData.value("ALBUM"));
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| 207 | albumItem->setFlags(albumItem->flags() ^ Qt::ItemIsEditable);
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| 208 | QTableWidgetItem *yearItem = new QTableWidgetItem(metaData.value("DATE"));
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| 209 | yearItem->setFlags(yearItem->flags() ^ Qt::ItemIsEditable);
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| 210 | //![14]
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| 211 |
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| 212 | int currentRow = musicTable->rowCount();
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| 213 | musicTable->insertRow(currentRow);
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| 214 | musicTable->setItem(currentRow, 0, titleItem);
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| 215 | musicTable->setItem(currentRow, 1, artistItem);
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| 216 | musicTable->setItem(currentRow, 2, albumItem);
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| 217 | musicTable->setItem(currentRow, 3, yearItem);
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| 218 |
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| 219 | //![15]
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| 220 | if (musicTable->selectedItems().isEmpty()) {
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| 221 | musicTable->selectRow(0);
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| 222 | mediaObject->setCurrentSource(metaInformationResolver->currentSource());
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| 223 | }
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| 224 |
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| 225 | Phonon::MediaSource source = metaInformationResolver->currentSource();
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| 226 | int index = sources.indexOf(metaInformationResolver->currentSource()) + 1;
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| 227 | if (sources.size() > index) {
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| 228 | metaInformationResolver->setCurrentSource(sources.at(index));
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| 229 | }
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| 230 | else {
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| 231 | musicTable->resizeColumnsToContents();
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| 232 | if (musicTable->columnWidth(0) > 300)
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| 233 | musicTable->setColumnWidth(0, 300);
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| 234 | }
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| 235 | }
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| 236 | //![15]
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| 237 |
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| 238 | //![16]
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| 239 | void MainWindow::aboutToFinish()
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| 240 | {
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| 241 | int index = sources.indexOf(mediaObject->currentSource()) + 1;
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| 242 | if (sources.size() > index) {
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| 243 | mediaObject->enqueue(sources.at(index));
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| 244 | }
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| 245 | }
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| 246 | //![16]
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| 247 |
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| 248 | void MainWindow::setupActions()
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| 249 | {
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| 250 | playAction = new QAction(style()->standardIcon(QStyle::SP_MediaPlay), tr("Play"), this);
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| [846] | 251 | playAction->setShortcut(tr("Ctrl+P"));
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| [556] | 252 | playAction->setDisabled(true);
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| 253 | pauseAction = new QAction(style()->standardIcon(QStyle::SP_MediaPause), tr("Pause"), this);
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| 254 | pauseAction->setShortcut(tr("Ctrl+A"));
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| 255 | pauseAction->setDisabled(true);
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| 256 | stopAction = new QAction(style()->standardIcon(QStyle::SP_MediaStop), tr("Stop"), this);
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| 257 | stopAction->setShortcut(tr("Ctrl+S"));
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| 258 | stopAction->setDisabled(true);
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| 259 | nextAction = new QAction(style()->standardIcon(QStyle::SP_MediaSkipForward), tr("Next"), this);
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| 260 | nextAction->setShortcut(tr("Ctrl+N"));
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| 261 | previousAction = new QAction(style()->standardIcon(QStyle::SP_MediaSkipBackward), tr("Previous"), this);
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| 262 | previousAction->setShortcut(tr("Ctrl+R"));
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| 263 | addFilesAction = new QAction(tr("Add &Files"), this);
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| 264 | addFilesAction->setShortcut(tr("Ctrl+F"));
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| 265 | exitAction = new QAction(tr("E&xit"), this);
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| 266 | exitAction->setShortcuts(QKeySequence::Quit);
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| 267 | aboutAction = new QAction(tr("A&bout"), this);
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| 268 | aboutAction->setShortcut(tr("Ctrl+B"));
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| 269 | aboutQtAction = new QAction(tr("About &Qt"), this);
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| 270 | aboutQtAction->setShortcut(tr("Ctrl+Q"));
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| 271 |
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| 272 | //![5]
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| 273 | connect(playAction, SIGNAL(triggered()), mediaObject, SLOT(play()));
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| 274 | connect(pauseAction, SIGNAL(triggered()), mediaObject, SLOT(pause()) );
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| 275 | connect(stopAction, SIGNAL(triggered()), mediaObject, SLOT(stop()));
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| 276 | //![5]
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| 277 | connect(addFilesAction, SIGNAL(triggered()), this, SLOT(addFiles()));
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| 278 | connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
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| 279 | connect(aboutAction, SIGNAL(triggered()), this, SLOT(about()));
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| 280 | connect(aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
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| 281 | }
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| 282 |
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| 283 | void MainWindow::setupMenus()
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| 284 | {
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| 285 | QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
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| 286 | fileMenu->addAction(addFilesAction);
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| 287 | fileMenu->addSeparator();
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| 288 | fileMenu->addAction(exitAction);
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| 289 |
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| 290 | QMenu *aboutMenu = menuBar()->addMenu(tr("&Help"));
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| 291 | aboutMenu->addAction(aboutAction);
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| 292 | aboutMenu->addAction(aboutQtAction);
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| 293 | }
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| 294 |
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| 295 | //![3]
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| 296 | void MainWindow::setupUi()
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| 297 | {
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| 298 | //![3]
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| 299 | QToolBar *bar = new QToolBar;
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| 300 |
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| 301 | bar->addAction(playAction);
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| 302 | bar->addAction(pauseAction);
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| 303 | bar->addAction(stopAction);
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| 304 |
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| 305 | //![4]
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| 306 | seekSlider = new Phonon::SeekSlider(this);
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| 307 | seekSlider->setMediaObject(mediaObject);
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| 308 |
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| 309 | volumeSlider = new Phonon::VolumeSlider(this);
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| 310 | volumeSlider->setAudioOutput(audioOutput);
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| 311 | //![4]
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| 312 | volumeSlider->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);
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| 313 |
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| 314 | QLabel *volumeLabel = new QLabel;
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| 315 | volumeLabel->setPixmap(QPixmap("images/volume.png"));
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| 316 |
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| 317 | QPalette palette;
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| 318 | palette.setBrush(QPalette::Light, Qt::darkGray);
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| 319 |
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| 320 | timeLcd = new QLCDNumber;
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| 321 | timeLcd->setPalette(palette);
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| 322 |
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| 323 | QStringList headers;
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| 324 | headers << tr("Title") << tr("Artist") << tr("Album") << tr("Year");
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| 325 |
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| 326 | musicTable = new QTableWidget(0, 4);
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| 327 | musicTable->setHorizontalHeaderLabels(headers);
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| 328 | musicTable->setSelectionMode(QAbstractItemView::SingleSelection);
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| 329 | musicTable->setSelectionBehavior(QAbstractItemView::SelectRows);
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| 330 | connect(musicTable, SIGNAL(cellPressed(int,int)),
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| 331 | this, SLOT(tableClicked(int,int)));
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| 332 |
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| 333 | QHBoxLayout *seekerLayout = new QHBoxLayout;
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| 334 | seekerLayout->addWidget(seekSlider);
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| 335 | seekerLayout->addWidget(timeLcd);
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| 336 |
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| 337 | QHBoxLayout *playbackLayout = new QHBoxLayout;
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| 338 | playbackLayout->addWidget(bar);
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| 339 | playbackLayout->addStretch();
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| 340 | playbackLayout->addWidget(volumeLabel);
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| 341 | playbackLayout->addWidget(volumeSlider);
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| 342 |
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| 343 | QVBoxLayout *mainLayout = new QVBoxLayout;
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| 344 | mainLayout->addWidget(musicTable);
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| 345 | mainLayout->addLayout(seekerLayout);
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| 346 | mainLayout->addLayout(playbackLayout);
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| 347 |
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| 348 | QWidget *widget = new QWidget;
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| 349 | widget->setLayout(mainLayout);
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| 350 |
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| 351 | setCentralWidget(widget);
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| 352 | setWindowTitle("Phonon Music Player");
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| 353 | }
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| 354 |
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