playercontrols.cpp Example File

multimediawidgets/player/playercontrols.cpp
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#include "playercontrols.h" #include <QBoxLayout> #include <QSlider> #include <QStyle> #include <QToolButton> #include <QComboBox> #include <QAudio> PlayerControls::PlayerControls(QWidget *parent) : QWidget(parent) { m_playButton = new QToolButton(this); m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); connect(m_playButton, &QAbstractButton::clicked, this, &PlayerControls::playClicked); m_stopButton = new QToolButton(this); m_stopButton->setIcon(style()->standardIcon(QStyle::SP_MediaStop)); m_stopButton->setEnabled(false); connect(m_stopButton, &QAbstractButton::clicked, this, &PlayerControls::stop); m_nextButton = new QToolButton(this); m_nextButton->setIcon(style()->standardIcon(QStyle::SP_MediaSkipForward)); connect(m_nextButton, &QAbstractButton::clicked, this, &PlayerControls::next); m_previousButton = new QToolButton(this); m_previousButton->setIcon(style()->standardIcon(QStyle::SP_MediaSkipBackward)); connect(m_previousButton, &QAbstractButton::clicked, this, &PlayerControls::previous); m_muteButton = new QToolButton(this); m_muteButton->setIcon(style()->standardIcon(QStyle::SP_MediaVolume)); connect(m_muteButton, &QAbstractButton::clicked, this, &PlayerControls::muteClicked); m_volumeSlider = new QSlider(Qt::Horizontal, this); m_volumeSlider->setRange(0, 100); connect(m_volumeSlider, &QSlider::valueChanged, this, &PlayerControls::onVolumeSliderValueChanged); m_rateBox = new QComboBox(this); m_rateBox->addItem("0.5x", QVariant(0.5)); m_rateBox->addItem("1.0x", QVariant(1.0)); m_rateBox->addItem("2.0x", QVariant(2.0)); m_rateBox->setCurrentIndex(1); connect(m_rateBox, QOverload<int>::of(&QComboBox::activated), this, &PlayerControls::updateRate); QBoxLayout *layout = new QHBoxLayout; layout->setMargin(0); layout->addWidget(m_stopButton); layout->addWidget(m_previousButton); layout->addWidget(m_playButton); layout->addWidget(m_nextButton); layout->addWidget(m_muteButton); layout->addWidget(m_volumeSlider); layout->addWidget(m_rateBox); setLayout(layout); } QMediaPlayer::State PlayerControls::state() const { return m_playerState; } void PlayerControls::setState(QMediaPlayer::State state) { if (state != m_playerState) { m_playerState = state; switch (state) { case QMediaPlayer::StoppedState: m_stopButton->setEnabled(false); m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); break; case QMediaPlayer::PlayingState: m_stopButton->setEnabled(true); m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause)); break; case QMediaPlayer::PausedState: m_stopButton->setEnabled(true); m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); break; } } } int PlayerControls::volume() const { qreal linearVolume = QAudio::convertVolume(m_volumeSlider->value() / qreal(100), QAudio::LogarithmicVolumeScale, QAudio::LinearVolumeScale); return qRound(linearVolume * 100); } void PlayerControls::setVolume(int volume) { qreal logarithmicVolume = QAudio::convertVolume(volume / qreal(100), QAudio::LinearVolumeScale, QAudio::LogarithmicVolumeScale); m_volumeSlider->setValue(qRound(logarithmicVolume * 100)); } bool PlayerControls::isMuted() const { return m_playerMuted; } void PlayerControls::setMuted(bool muted) { if (muted != m_playerMuted) { m_playerMuted = muted; m_muteButton->setIcon(style()->standardIcon(muted ? QStyle::SP_MediaVolumeMuted : QStyle::SP_MediaVolume)); } } void PlayerControls::playClicked() { switch (m_playerState) { case QMediaPlayer::StoppedState: case QMediaPlayer::PausedState: emit play(); break; case QMediaPlayer::PlayingState: emit pause(); break; } } void PlayerControls::muteClicked() { emit changeMuting(!m_playerMuted); } qreal PlayerControls::playbackRate() const { return m_rateBox->itemData(m_rateBox->currentIndex()).toDouble(); } void PlayerControls::setPlaybackRate(float rate) { for (int i = 0; i < m_rateBox->count(); ++i) { if (qFuzzyCompare(rate, float(m_rateBox->itemData(i).toDouble()))) { m_rateBox->setCurrentIndex(i); return; } } m_rateBox->addItem(QString("%1x").arg(rate), QVariant(rate)); m_rateBox->setCurrentIndex(m_rateBox->count() - 1); } void PlayerControls::updateRate() { emit changeRate(playbackRate()); } void PlayerControls::onVolumeSliderValueChanged() { emit changeVolume(volume()); }