PlayerControls.cpp
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#include <QTime>
#include <QStyle>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include "PlayerControls.h"
/////////////////
// constructor //
/////////////////
PlayerControls::PlayerControls(QWidget *parent)
: QWidget(parent),
playerState(QMediaPlayer::StoppedState),
m_isMuted(false)
{
m_durationSlider = new QSlider(Qt::Horizontal);
connect(m_durationSlider, SIGNAL(sliderMoved(int)), this, SLOT(sliderMoved(int)));
m_currentTimeLabel = new QLabel("--:--");
QLabel *separatorLabel = new QLabel("/");
m_durationLabel = new QLabel("--:--");
QToolButton *previousButton = new QToolButton(this);
previousButton->setIcon(style()->standardIcon(QStyle::SP_MediaSkipBackward));
m_playButton = new QToolButton;
m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
connect(m_playButton, SIGNAL(clicked()), this, SLOT(playClicked()));
QToolButton *nextButton = new QToolButton(this);
nextButton->setIcon(style()->standardIcon(QStyle::SP_MediaSkipForward));
QToolButton *stopButton = new QToolButton;
stopButton->setIcon(style()->standardIcon(QStyle::SP_MediaStop));
connect(stopButton, SIGNAL(clicked()), this, SLOT(stopClicked()));
m_muteButton = new QToolButton;
m_muteButton->setIcon(style()->standardIcon(QStyle::SP_MediaVolume));
connect(m_muteButton, SIGNAL(clicked()), this, SLOT(switchMuted()));
QLabel *rateMult = new QLabel("x");
m_rateBox = new QComboBox;
m_rateBox->addItem("0.25");
m_rateBox->addItem("0.5");
m_rateBox->addItem("1.0");
m_rateBox->addItem("2.0");
m_rateBox->addItem("4.0");
m_rateBox->setCurrentIndex(2);
connect(m_rateBox, SIGNAL(currentTextChanged(const QString&)), this, SLOT(rateChanged(const QString&)));
QHBoxLayout *durationLayout = new QHBoxLayout;
durationLayout->addWidget(m_durationSlider);
durationLayout->addWidget(m_currentTimeLabel);
durationLayout->addWidget(separatorLabel);
durationLayout->addWidget(m_durationLabel);
QHBoxLayout *buttonBarLayout = new QHBoxLayout;
buttonBarLayout->addWidget(previousButton);
buttonBarLayout->addWidget(m_playButton);
buttonBarLayout->addWidget(nextButton);
buttonBarLayout->addWidget(stopButton);
buttonBarLayout->addWidget(m_muteButton);
buttonBarLayout->addWidget(m_durationSlider);
buttonBarLayout->addWidget(m_durationLabel);
buttonBarLayout->addWidget(m_rateBox);
buttonBarLayout->addWidget(rateMult);
QVBoxLayout *controlsLayout = new QVBoxLayout;
controlsLayout->addLayout(durationLayout);
controlsLayout->addLayout(buttonBarLayout);
setLayout(controlsLayout);
}
////////////////
// destructor //
////////////////
PlayerControls::~PlayerControls()
{
}
void PlayerControls::reset()
{
m_currentTimeLabel->setText("--:--");
m_durationLabel->setText("--:--");
setEnabled(false);
}
/////////////////////////////////////////
// public slots in reaction to signals //
// emitted by the player //
/////////////////////////////////////////
void PlayerControls::durationChanged(qint64 duration)
{
QString tStr;
m_durationSlider->setMaximum(duration);
duration /= 1000;
QTime totalTime(duration / 3600, (duration / 60) % 60, duration % 60);
if (duration > 3600)
m_timeFormat = "hh:mm:ss";
else
m_timeFormat = "mm:ss";
tStr = totalTime.toString(m_timeFormat);
m_durationLabel->setText(tStr);
}
void PlayerControls::positionChanged(qint64 position)
{
QString tStr;
m_durationSlider->setSliderPosition(position);
position /= 1000;
QTime currentTime((position / 3600) % 60, (position / 60) % 60, position % 60);
tStr = currentTime.toString(m_timeFormat);
m_currentTimeLabel->setText(tStr);
}
void PlayerControls::mediaStatusChanged(QMediaPlayer::MediaStatus status)
{
if (status == QMediaPlayer::EndOfMedia)
stopClicked();
}
////////////////////////////////
// private slots used to emit //
// signals to the player //
////////////////////////////////
void PlayerControls::playClicked()
{
if (playerState == QMediaPlayer::StoppedState || playerState == QMediaPlayer::PausedState) {
emit play();
m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause));
playerState = QMediaPlayer::PlayingState;
}
else {
emit pause();
m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
playerState = QMediaPlayer::PausedState;
}
}
void PlayerControls::stopClicked()
{
m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
playerState = QMediaPlayer::StoppedState;
emit stop();
sliderMoved(0);
m_muteButton->setIcon(style()->standardIcon(QStyle::SP_MediaVolume));
m_muteButton->setEnabled(true);
emit setMuted(false);
m_rateBox->setCurrentIndex(2);
emit playbackRateChanged(1.0);
}
void PlayerControls::switchMuted()
{
m_isMuted = !m_isMuted;
emit setMuted(m_isMuted);
if (m_isMuted)
m_muteButton->setIcon(style()->standardIcon(QStyle::SP_MediaVolumeMuted));
else
m_muteButton->setIcon(style()->standardIcon(QStyle::SP_MediaVolume));
}
void PlayerControls::sliderMoved(int value)
{
positionChanged(value);
emit positionManuallyChanged(value);
}
void PlayerControls::rateChanged(const QString &rate)
{
qreal doubleRate = rate.toDouble();
emit playbackRateChanged(doubleRate);
if (doubleRate != 1.0) {
emit setMuted(true);
m_muteButton->setIcon(style()->standardIcon(QStyle::SP_MediaVolumeMuted));
m_muteButton->setEnabled(false);
}
else {
emit setMuted(false);
m_muteButton->setIcon(style()->standardIcon(QStyle::SP_MediaVolume));
m_muteButton->setEnabled(true);
}
}