// 初始化播放器
void MyWidget::initPlayer()
{
// 设置主界面标题、图标和大小
setWindowTitle(tr("MyPlayer音乐播放器"));
setWindowIcon(QIcon(":/images/icon.png"));
setMinimumSize(320, 160);
setMaximumSize(320, 160);
// 创建媒体图
mediaObject = new Phonon::MediaObject(this);
Phonon::AudioOutput *audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory, this);
Phonon::createPath(mediaObject, audioOutput);
// 关联媒体对象的tick()信号来更新播放时间的显示
connect(mediaObject, SIGNAL(tick(qint64)), this, SLOT(updateTime(qint64)));
// 创建顶部标签，用于显示一些信息
topLabel = new QLabel(tr("<a href = \" http://www.yafeilinux.com \"> www.yafeilinux.com </a>"));
topLabel->setTextFormat(Qt::RichText);
topLabel->setOpenExternalLinks(true);
topLabel->setAlignment(Qt::AlignCenter);
// 创建控制播放进度的滑块
Phonon::SeekSlider *seekSlider = new Phonon::SeekSlider(mediaObject, this);
// 创建包含播放列表图标、显示时间标签和桌面歌词图标的工具栏
QToolBar *widgetBar = new QToolBar(this);
// 显示播放时间的标签
timeLabel = new QLabel(tr("00:00 / 00:00"), this);
timeLabel->setToolTip(tr("当前时间 / 总时间"));
timeLabel->setAlignment(Qt::AlignCenter);
timeLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
// 创建图标，用于控制是否显示播放列表
QAction *PLAction = new QAction(tr("PL"), this);
PLAction->setShortcut(QKeySequence("F4"));
PLAction->setToolTip(tr("播放列表(F4)"));
connect(PLAction, SIGNAL(triggered()), this, SLOT(setPlaylistShown()));
// 创建图标，用于控制是否显示桌面歌词
QAction *LRCAction = new QAction(tr("LRC"), this);
LRCAction->setShortcut(QKeySequence("F2"));
LRCAction->setToolTip(tr("桌面歌词(F2)"));
connect(LRCAction, SIGNAL(triggered()), this, SLOT(setLrcShown()));
// 添加到工具栏
widgetBar->addAction(PLAction);
widgetBar->addSeparator();
widgetBar->addWidget(timeLabel);
widgetBar->addSeparator();
widgetBar->addAction(LRCAction);
// 创建播放控制动作工具栏
QToolBar *toolBar = new QToolBar(this);
// 播放动作
playAction = new QAction(this);
playAction->setIcon(QIcon(":/images/play.png"));
playAction->setText(tr("播放(F5)"));
playAction->setShortcut(QKeySequence(tr("F5")));
connect(playAction, SIGNAL(triggered()), this, SLOT(setPaused()));
// 停止动作
stopAction = new QAction(this);
stopAction->setIcon(QIcon(":/images/stop.png"));
stopAction->setText(tr("停止(F6)"));
stopAction->setShortcut(QKeySequence(tr("F6")));
connect(stopAction, SIGNAL(triggered()), mediaObject, SLOT(stop()));
// 跳转到上一首动作
skipBackwardAction = new QAction(this);
skipBackwardAction->setIcon(QIcon(":/images/skipBackward.png"));
skipBackwardAction->setText(tr("上一首(Ctrl+Left)"));
skipBackwardAction->setShortcut(QKeySequence(tr("Ctrl+Left")));
connect(skipBackwardAction, SIGNAL(triggered()), this, SLOT(skipBackward()));
// 跳转到下一首动作
skipForwardAction = new QAction(this);
skipForwardAction->setIcon(QIcon(":/images/skipForward.png"));
skipForwardAction->setText(tr("下一首(Ctrl+Right)"));
skipForwardAction->setShortcut(QKeySequence(tr("Ctrl+Right")));
connect(skipForwardAction, SIGNAL(triggered()), this, SLOT(skipForward()));
// 打开文件动作
QAction *openAction = new QAction(this);
openAction->setIcon(QIcon(":/images/open.png"));
openAction->setText(tr("播放文件(Ctrl+O)"));
openAction->setShortcut(QKeySequence(tr("Ctrl+O")));
connect(openAction, SIGNAL(triggered()), this, SLOT(openFile()));
// 音量控制部件
Phonon::VolumeSlider *volumeSlider = new Phonon::VolumeSlider(audioOutput, this);
volumeSlider->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);
// 添加到工具栏
toolBar->addAction(playAction);
toolBar->addSeparator();
toolBar->addAction(stopAction);
toolBar->addSeparator();
toolBar->addAction(skipBackwardAction);
toolBar->addSeparator();
toolBar->addAction(skipForwardAction);
toolBar->addSeparator();
toolBar->addWidget(volumeSlider);
toolBar->addSeparator();
toolBar->addAction(openAction);
// 创建主界面布局管理器
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addWidget(topLabel);
mainLayout->addWidget(seekSlider);
mainLayout->addWidget(widgetBar);
mainLayout->addWidget(toolBar);
setLayout(mainLayout);
// 在3-2中添加的代码
connect(mediaObject, SIGNAL(stateChanged(Phonon::State, Phonon::State)),
this, SLOT(stateChanged(Phonon::State, Phonon::State)));
// 以下是在3-3中添加的代码
// 创建播放列表
playlist = new MyPlaylist(this);
connect(playlist, SIGNAL(cellClicked(int, int)), this, SLOT(tableClicked(int)));
connect(playlist, SIGNAL(playlistClean()), this, SLOT(clearSources()));
// 创建用来解析媒体的信息的元信息解析器
metaInformationResolver = new Phonon::MediaObject(this);
// 需要与AudioOutput连接后才能使用metaInformationResolver来获取歌曲的总时间
Phonon::AudioOutput *metaInformationAudioOutput =
new Phonon::AudioOutput(Phonon::MusicCategory, this);
Phonon::createPath(metaInformationResolver, metaInformationAudioOutput);
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()));
// 初始化动作图标的状态
playAction->setEnabled(false);
stopAction->setEnabled(false);
skipBackwardAction->setEnabled(false);
skipForwardAction->setEnabled(false);
topLabel->setFocus();
}
void MusicPlayList::clearPlaylist()
{
while(rowCount())
removeRow(0);
emit playlistClean();
}