source: trunk/examples/phonon/qmusicplayer/mainwindow.cpp@ 846

Last change on this file since 846 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
  • Property svn:eol-style set to native
File size: 12.0 KB
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1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the examples of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:BSD$
10** You may use this file under the terms of the BSD license as follows:
11**
12** "Redistribution and use in source and binary forms, with or without
13** modification, are permitted provided that the following conditions are
14** met:
15** * Redistributions of source code must retain the above copyright
16** notice, this list of conditions and the following disclaimer.
17** * Redistributions in binary form must reproduce the above copyright
18** notice, this list of conditions and the following disclaimer in
19** the documentation and/or other materials provided with the
20** distribution.
21** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
22** the names of its contributors may be used to endorse or promote
23** products derived from this software without specific prior written
24** permission.
25**
26** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
37** $QT_END_LICENSE$
38**
39***************************************************************************/
40
41#include <QtGui>
42
43#include "mainwindow.h"
44
45//![0]
46MainWindow::MainWindow()
47{
48 audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory, this);
49 mediaObject = new Phonon::MediaObject(this);
50 metaInformationResolver = new Phonon::MediaObject(this);
51
52 mediaObject->setTickInterval(1000);
53//![0]
54//![2]
55 connect(mediaObject, SIGNAL(tick(qint64)), this, SLOT(tick(qint64)));
56 connect(mediaObject, SIGNAL(stateChanged(Phonon::State,Phonon::State)),
57 this, SLOT(stateChanged(Phonon::State,Phonon::State)));
58 connect(metaInformationResolver, SIGNAL(stateChanged(Phonon::State,Phonon::State)),
59 this, SLOT(metaStateChanged(Phonon::State,Phonon::State)));
60 connect(mediaObject, SIGNAL(currentSourceChanged(Phonon::MediaSource)),
61 this, SLOT(sourceChanged(Phonon::MediaSource)));
62 connect(mediaObject, SIGNAL(aboutToFinish()), this, SLOT(aboutToFinish()));
63//![2]
64
65//![1]
66 Phonon::createPath(mediaObject, audioOutput);
67//![1]
68
69 setupActions();
70 setupMenus();
71 setupUi();
72 timeLcd->display("00:00");
73}
74
75//![6]
76void MainWindow::addFiles()
77{
78 QStringList files = QFileDialog::getOpenFileNames(this, tr("Select Music Files"),
79 QDesktopServices::storageLocation(QDesktopServices::MusicLocation));
80
81 if (files.isEmpty())
82 return;
83
84 int index = sources.size();
85 foreach (QString string, files) {
86 Phonon::MediaSource source(string);
87
88 sources.append(source);
89 }
90 if (!sources.isEmpty())
91 metaInformationResolver->setCurrentSource(sources.at(index));
92
93}
94//![6]
95
96void MainWindow::about()
97{
98 QMessageBox::information(this, tr("About Music Player"),
99 tr("The Music Player example shows how to use Phonon - the multimedia"
100 " framework that comes with Qt - to create a simple music player."));
101}
102
103//![9]
104void MainWindow::stateChanged(Phonon::State newState, Phonon::State /* oldState */)
105{
106 switch (newState) {
107 case Phonon::ErrorState:
108 if (mediaObject->errorType() == Phonon::FatalError) {
109 QMessageBox::warning(this, tr("Fatal Error"),
110 mediaObject->errorString());
111 } else {
112 QMessageBox::warning(this, tr("Error"),
113 mediaObject->errorString());
114 }
115 break;
116//![9]
117//![10]
118 case Phonon::PlayingState:
119 playAction->setEnabled(false);
120 pauseAction->setEnabled(true);
121 stopAction->setEnabled(true);
122 break;
123 case Phonon::StoppedState:
124 stopAction->setEnabled(false);
125 playAction->setEnabled(true);
126 pauseAction->setEnabled(false);
127 timeLcd->display("00:00");
128 break;
129 case Phonon::PausedState:
130 pauseAction->setEnabled(false);
131 stopAction->setEnabled(true);
132 playAction->setEnabled(true);
133 break;
134//![10]
135 case Phonon::BufferingState:
136 break;
137 default:
138 ;
139 }
140}
141
142//![11]
143void MainWindow::tick(qint64 time)
144{
145 QTime displayTime(0, (time / 60000) % 60, (time / 1000) % 60);
146
147 timeLcd->display(displayTime.toString("mm:ss"));
148}
149//![11]
150
151//![12]
152void MainWindow::tableClicked(int row, int /* column */)
153{
154 bool wasPlaying = mediaObject->state() == Phonon::PlayingState;
155
156 mediaObject->stop();
157 mediaObject->clearQueue();
158
159 if (row >= sources.size())
160 return;
161
162 mediaObject->setCurrentSource(sources[row]);
163
164 if (wasPlaying)
165 mediaObject->play();
166 else
167 mediaObject->stop();
168}
169//![12]
170
171//![13]
172void MainWindow::sourceChanged(const Phonon::MediaSource &source)
173{
174 musicTable->selectRow(sources.indexOf(source));
175 timeLcd->display("00:00");
176}
177//![13]
178
179//![14]
180void MainWindow::metaStateChanged(Phonon::State newState, Phonon::State /* oldState */)
181{
182 if (newState == Phonon::ErrorState) {
183 QMessageBox::warning(this, tr("Error opening files"),
184 metaInformationResolver->errorString());
185 while (!sources.isEmpty() &&
186 !(sources.takeLast() == metaInformationResolver->currentSource())) {} /* loop */;
187 return;
188 }
189
190 if (newState != Phonon::StoppedState && newState != Phonon::PausedState)
191 return;
192
193 if (metaInformationResolver->currentSource().type() == Phonon::MediaSource::Invalid)
194 return;
195
196 QMap<QString, QString> metaData = metaInformationResolver->metaData();
197
198 QString title = metaData.value("TITLE");
199 if (title == "")
200 title = metaInformationResolver->currentSource().fileName();
201
202 QTableWidgetItem *titleItem = new QTableWidgetItem(title);
203 titleItem->setFlags(titleItem->flags() ^ Qt::ItemIsEditable);
204 QTableWidgetItem *artistItem = new QTableWidgetItem(metaData.value("ARTIST"));
205 artistItem->setFlags(artistItem->flags() ^ Qt::ItemIsEditable);
206 QTableWidgetItem *albumItem = new QTableWidgetItem(metaData.value("ALBUM"));
207 albumItem->setFlags(albumItem->flags() ^ Qt::ItemIsEditable);
208 QTableWidgetItem *yearItem = new QTableWidgetItem(metaData.value("DATE"));
209 yearItem->setFlags(yearItem->flags() ^ Qt::ItemIsEditable);
210//![14]
211
212 int currentRow = musicTable->rowCount();
213 musicTable->insertRow(currentRow);
214 musicTable->setItem(currentRow, 0, titleItem);
215 musicTable->setItem(currentRow, 1, artistItem);
216 musicTable->setItem(currentRow, 2, albumItem);
217 musicTable->setItem(currentRow, 3, yearItem);
218
219//![15]
220 if (musicTable->selectedItems().isEmpty()) {
221 musicTable->selectRow(0);
222 mediaObject->setCurrentSource(metaInformationResolver->currentSource());
223 }
224
225 Phonon::MediaSource source = metaInformationResolver->currentSource();
226 int index = sources.indexOf(metaInformationResolver->currentSource()) + 1;
227 if (sources.size() > index) {
228 metaInformationResolver->setCurrentSource(sources.at(index));
229 }
230 else {
231 musicTable->resizeColumnsToContents();
232 if (musicTable->columnWidth(0) > 300)
233 musicTable->setColumnWidth(0, 300);
234 }
235}
236//![15]
237
238//![16]
239void MainWindow::aboutToFinish()
240{
241 int index = sources.indexOf(mediaObject->currentSource()) + 1;
242 if (sources.size() > index) {
243 mediaObject->enqueue(sources.at(index));
244 }
245}
246//![16]
247
248void MainWindow::setupActions()
249{
250 playAction = new QAction(style()->standardIcon(QStyle::SP_MediaPlay), tr("Play"), this);
251 playAction->setShortcut(tr("Ctrl+P"));
252 playAction->setDisabled(true);
253 pauseAction = new QAction(style()->standardIcon(QStyle::SP_MediaPause), tr("Pause"), this);
254 pauseAction->setShortcut(tr("Ctrl+A"));
255 pauseAction->setDisabled(true);
256 stopAction = new QAction(style()->standardIcon(QStyle::SP_MediaStop), tr("Stop"), this);
257 stopAction->setShortcut(tr("Ctrl+S"));
258 stopAction->setDisabled(true);
259 nextAction = new QAction(style()->standardIcon(QStyle::SP_MediaSkipForward), tr("Next"), this);
260 nextAction->setShortcut(tr("Ctrl+N"));
261 previousAction = new QAction(style()->standardIcon(QStyle::SP_MediaSkipBackward), tr("Previous"), this);
262 previousAction->setShortcut(tr("Ctrl+R"));
263 addFilesAction = new QAction(tr("Add &Files"), this);
264 addFilesAction->setShortcut(tr("Ctrl+F"));
265 exitAction = new QAction(tr("E&xit"), this);
266 exitAction->setShortcuts(QKeySequence::Quit);
267 aboutAction = new QAction(tr("A&bout"), this);
268 aboutAction->setShortcut(tr("Ctrl+B"));
269 aboutQtAction = new QAction(tr("About &Qt"), this);
270 aboutQtAction->setShortcut(tr("Ctrl+Q"));
271
272//![5]
273 connect(playAction, SIGNAL(triggered()), mediaObject, SLOT(play()));
274 connect(pauseAction, SIGNAL(triggered()), mediaObject, SLOT(pause()) );
275 connect(stopAction, SIGNAL(triggered()), mediaObject, SLOT(stop()));
276//![5]
277 connect(addFilesAction, SIGNAL(triggered()), this, SLOT(addFiles()));
278 connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
279 connect(aboutAction, SIGNAL(triggered()), this, SLOT(about()));
280 connect(aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
281}
282
283void MainWindow::setupMenus()
284{
285 QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
286 fileMenu->addAction(addFilesAction);
287 fileMenu->addSeparator();
288 fileMenu->addAction(exitAction);
289
290 QMenu *aboutMenu = menuBar()->addMenu(tr("&Help"));
291 aboutMenu->addAction(aboutAction);
292 aboutMenu->addAction(aboutQtAction);
293}
294
295//![3]
296void MainWindow::setupUi()
297{
298//![3]
299 QToolBar *bar = new QToolBar;
300
301 bar->addAction(playAction);
302 bar->addAction(pauseAction);
303 bar->addAction(stopAction);
304
305//![4]
306 seekSlider = new Phonon::SeekSlider(this);
307 seekSlider->setMediaObject(mediaObject);
308
309 volumeSlider = new Phonon::VolumeSlider(this);
310 volumeSlider->setAudioOutput(audioOutput);
311//![4]
312 volumeSlider->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);
313
314 QLabel *volumeLabel = new QLabel;
315 volumeLabel->setPixmap(QPixmap("images/volume.png"));
316
317 QPalette palette;
318 palette.setBrush(QPalette::Light, Qt::darkGray);
319
320 timeLcd = new QLCDNumber;
321 timeLcd->setPalette(palette);
322
323 QStringList headers;
324 headers << tr("Title") << tr("Artist") << tr("Album") << tr("Year");
325
326 musicTable = new QTableWidget(0, 4);
327 musicTable->setHorizontalHeaderLabels(headers);
328 musicTable->setSelectionMode(QAbstractItemView::SingleSelection);
329 musicTable->setSelectionBehavior(QAbstractItemView::SelectRows);
330 connect(musicTable, SIGNAL(cellPressed(int,int)),
331 this, SLOT(tableClicked(int,int)));
332
333 QHBoxLayout *seekerLayout = new QHBoxLayout;
334 seekerLayout->addWidget(seekSlider);
335 seekerLayout->addWidget(timeLcd);
336
337 QHBoxLayout *playbackLayout = new QHBoxLayout;
338 playbackLayout->addWidget(bar);
339 playbackLayout->addStretch();
340 playbackLayout->addWidget(volumeLabel);
341 playbackLayout->addWidget(volumeSlider);
342
343 QVBoxLayout *mainLayout = new QVBoxLayout;
344 mainLayout->addWidget(musicTable);
345 mainLayout->addLayout(seekerLayout);
346 mainLayout->addLayout(playbackLayout);
347
348 QWidget *widget = new QWidget;
349 widget->setLayout(mainLayout);
350
351 setCentralWidget(widget);
352 setWindowTitle("Phonon Music Player");
353}
354
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