qt实现的简易音乐播放

#include "audioplayer.h" #include<QIcon> #include<QLabel> #include<QToolButton> #include<QSlider> #include<QHBoxLayout> #include<QVBoxLayout> #include<QFileDialog> #include<QMediaPlayer> #include<QStandardPaths> #include<QTime> #include"denoiser/denoiser.h" #include<QLineEdit> #include<QFile> audioplayer::audioplayer(QWidget *parent) : QWidget(parent) { createWidgets(); QString style; style = Uiload(); setStyleSheet(style); } void audioplayer::createWidgets() { saveAudio =new QToolButton(this); saveAudio->setToolTip(tr("Save Audio")); saveAudio->setIcon(QIcon(":/images/save.png")); saveAudio->setStyleSheet("background:transparent"); connect(saveAudio,SIGNAL(clicked(bool)),this,SLOT(saveAudioFile())); playButton = new QToolButton(this); playButton->setEnabled(false); playButton->setToolTip(tr("Play")); playButton->setIcon(QIcon(":/images/play.png")); connect(playButton,SIGNAL(clicked(bool)), this, SLOT(togglePlayback())); forwardToolButton =new QToolButton(this); forwardToolButton->setToolTip(tr("next")); forwardToolButton->setIcon(QIcon(":/images/skipForward.png")); connect(forwardToolButton,SIGNAL(clicked(bool)),this,SLOT(seekForward())); backwardToolButton =new QToolButton(this); backwardToolButton->setToolTip(tr("Back")); backwardToolButton->setIcon(QIcon(":/images/skipBackward.png")); connect(backwardToolButton,SIGNAL(clicked(bool)),this,SLOT(seekBackward())); openfileButton = new QToolButton(this); openfileButton->setIcon(QIcon(":/images/open.png")); openfileButton->setIconSize(QSize(24,24)); openfileButton->setStyleSheet("background:transparent"); openfileButton->setToolTip(tr("Open a file...")); openfileButton->setFixedSize(playButton->sizeHint()); connect(openfileButton,SIGNAL(clicked(bool)), this, SLOT(openFile())); positionSlider = new QSlider(Qt::Horizontal, this); positionSlider->setEnabled(false); positionSlider->setToolTip(tr("Seek")); connect(positionSlider, SIGNAL(valueChanged(int)), this, SLOT(setPosition(int))); infoLabel = new QLabel(this); positionLabel = new QLabel(tr("00:00"), this); positionLabel->setMinimumWidth(positionLabel->sizeHint().width()); denoiserWidget =new denoiser(this); connect(denoiserWidget,SIGNAL(ListenEmited()),this,SLOT(onStartListened())); QHBoxLayout *controlLayout = new QHBoxLayout; controlLayout->setMargin(0); controlLayout->addWidget(openfileButton); controlLayout->addWidget(saveAudio); controlLayout->addWidget(positionSlider); controlLayout->addWidget(positionLabel); controlLayout->addWidget(playButton); controlLayout->addWidget(forwardToolButton); controlLayout->addWidget(backwardToolButton); //QLineEdit *test = new QLineEdit(this); QVBoxLayout *mainLayout = new QVBoxLayout(this); mainLayout->addWidget(infoLabel); mainLayout->addLayout(controlLayout); mainLayout->addStretch(); mainLayout->addWidget(denoiserWidget); //mainLayout->addWidget(test); //control the progressbar connect(&mediaPlayer, &QMediaPlayer::positionChanged, this, &audioplayer::updatePosition); connect(&mediaPlayer, &QMediaPlayer::durationChanged, this, &audioplayer::updateDuration); connect(&mediaPlayer, &QMediaObject::metaDataAvailableChanged, this, &audioplayer::updateInfo); connect(&mediaPlayer,&QMediaPlayer::stateChanged,this,&audioplayer::updateState); } void audioplayer::openFile() { const QStringList musicPaths = QStandardPaths::standardLocations(QStandardPaths::MusicLocation); const QString filePath = QFileDialog::getOpenFileName(this, tr("Open File"), musicPaths.isEmpty() ? QDir::homePath() : musicPaths.first(), tr("MP3 files (*.mp3);;All files (*.*)")); if (!filePath.isEmpty()) playFile(filePath); } void audioplayer::playFile(const QString &filePath) { playButton->setEnabled(true); infoLabel->setText(QFileInfo(filePath).fileName()); mediaPlayer.setMedia(QUrl::fromLocalFile(filePath)); mediaPlayer.play(); } void audioplayer::togglePlayback() { if (mediaPlayer.mediaStatus() == QMediaPlayer::NoMedia) openFile(); else if (mediaPlayer.state() == QMediaPlayer::PlayingState) mediaPlayer.pause(); else mediaPlayer.play(); } void audioplayer::seekForward() { positionSlider->triggerAction(QSlider::SliderPageStepAdd); } void audioplayer::seekBackward() { positionSlider->triggerAction(QSlider::SliderPageStepSub); } void audioplayer::updateState(QMediaPlayer::State state) { if (state == QMediaPlayer::PlayingState) { playButton->setToolTip(tr("Pause")); playButton->setIcon(QIcon(":/images/pause.png")); } else { playButton->setToolTip(tr("Play")); playButton->setIcon(QIcon(":/images/play.png")); } } void audioplayer::updateDuration(qint64 duration) { positionSlider->setRange(0,duration); positionSlider->setEnabled(duration>0); positionSlider->setPageStep(duration/10); } void audioplayer::updatePosition(qint64 position) { positionSlider->setValue(position); QTime duration(0, position / 60000, qRound((position % 60000) / 1000.0)); positionLabel->setText(duration.toString(tr("mm:ss"))); } void audioplayer::setPosition(int position) { if (qAbs(mediaPlayer.position() - position) > 99) mediaPlayer.setPosition(position); } void audioplayer::updateInfo() { QStringList info; QString author = mediaPlayer.metaData("Author").toString(); if (!author.isEmpty()) info += author; QString title = mediaPlayer.metaData("Title").toString(); if (!title.isEmpty()) info += title; if (!info.isEmpty()) infoLabel->setText(info.join(tr(" - "))); } void audioplayer::saveAudioFile() { //add the method for solving the binary data and generating the audio files } void audioplayer::onStartListened() { positionSlider->triggerAction(QSlider::SliderPageStepAdd); } QString audioplayer::Uiload() { QFile file(":/images/uistyle.qss"); file.open(QFile::ReadOnly); QString strStyle = QString::fromLatin1(file.readAll()); return strStyle; }