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| ** Copyright (C) 2017 The Qt Company Ltd. |
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| ** This file is part of the examples of the Qt Toolkit. |
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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->setContentsMargins(0, 0, 0, 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()); |
| } |