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** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the examples of the Qt Toolkit.
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#include "musicplayer.h"
#include "volumebutton.h"
#include <QtWidgets>
#include <QtWinExtras>
MusicPlayer::MusicPlayer(QWidget *parent) : QWidget(parent)
{
createWidgets();
createShortcuts();
createJumpList();
createTaskbar();
createThumbnailToolBar();
connect(&mediaPlayer, &QMediaPlayer::positionChanged, this, &MusicPlayer::updatePosition);
connect(&mediaPlayer, &QMediaPlayer::durationChanged, this, &MusicPlayer::updateDuration);
connect(&mediaPlayer, &QMediaObject::metaDataAvailableChanged, this, &MusicPlayer::updateInfo);
connect(&mediaPlayer, QOverload<QMediaPlayer::Error>::of(&QMediaPlayer::error),
this, &MusicPlayer::handleError);
connect(&mediaPlayer, &QMediaPlayer::stateChanged,
this, &MusicPlayer::updateState);
stylize();
setAcceptDrops(true);
}
QStringList MusicPlayer::supportedMimeTypes()
{
QStringList result = QMediaPlayer::supportedMimeTypes();
if (result.isEmpty())
result.append(QStringLiteral("audio/mpeg"));
return result;
}
void MusicPlayer::openFile()
{
QFileDialog fileDialog(this);
fileDialog.setAcceptMode(QFileDialog::AcceptOpen);
fileDialog.setWindowTitle(tr("Open File"));
fileDialog.setMimeTypeFilters(MusicPlayer::supportedMimeTypes());
fileDialog.setDirectory(QStandardPaths::standardLocations(QStandardPaths::MusicLocation).value(0, QDir::homePath()));
if (fileDialog.exec() == QDialog::Accepted)
playUrl(fileDialog.selectedUrls().constFirst());
}
void MusicPlayer::playUrl(const QUrl &url)
{
playButton->setEnabled(true);
if (url.isLocalFile()) {
const QString filePath = url.toLocalFile();
setWindowFilePath(filePath);
infoLabel->setText(QDir::toNativeSeparators(filePath));
fileName = QFileInfo(filePath).fileName();
} else {
setWindowFilePath(QString());
infoLabel->setText(url.toString());
fileName.clear();
}
mediaPlayer.setMedia(url);
mediaPlayer.play();
}
void MusicPlayer::togglePlayback()
{
if (mediaPlayer.mediaStatus() == QMediaPlayer::NoMedia)
openFile();
else if (mediaPlayer.state() == QMediaPlayer::PlayingState)
mediaPlayer.pause();
else
mediaPlayer.play();
}
void MusicPlayer::seekForward()
{
positionSlider->triggerAction(QSlider::SliderPageStepAdd);
}
void MusicPlayer::seekBackward()
{
positionSlider->triggerAction(QSlider::SliderPageStepSub);
}
//! [0]
bool MusicPlayer::event(QEvent *event)
{
if (event->type() == QWinEvent::CompositionChange || event->type() == QWinEvent::ColorizationChange)
stylize();
return QWidget::event(event);
}
//! [0]
//! [7]
void MusicPlayer::showEvent(QShowEvent *event)
{
QWidget::showEvent(event);
if (!taskbarButton->window()) {
auto window = windowHandle();
taskbarButton->setWindow(window);
thumbnailToolBar->setWindow(window);
}
}
//! [7]
static bool canHandleDrop(const QDropEvent *event)
{
const auto urls = event->mimeData()->urls();
if (urls.size() != 1)
return false;
QMimeDatabase mimeDatabase;
return MusicPlayer::supportedMimeTypes().
contains(mimeDatabase.mimeTypeForUrl(urls.constFirst()).name());
}
void MusicPlayer::dragEnterEvent(QDragEnterEvent *event)
{
event->setAccepted(canHandleDrop(event));
}
void MusicPlayer::dropEvent(QDropEvent *event)
{
event->accept();
playUrl(event->mimeData()->urls().constFirst());
}
void MusicPlayer::mousePressEvent(QMouseEvent *event)
{
offset = event->globalPos() - pos();
event->accept();
}
void MusicPlayer::mouseMoveEvent(QMouseEvent *event)
{
move(event->globalPos() - offset);
event->accept();
}
void MusicPlayer::mouseReleaseEvent(QMouseEvent *event)
{
offset = QPoint();
event->accept();
}
//! [1]
void MusicPlayer::stylize()
{
if (QOperatingSystemVersion::current() < QOperatingSystemVersion::Windows8) {
// Set styling options relevant only to Windows 7.
if (QtWin::isCompositionEnabled()) {
QtWin::extendFrameIntoClientArea(this, -1, -1, -1, -1);
setAttribute(Qt::WA_TranslucentBackground, true);
setAttribute(Qt::WA_NoSystemBackground, false);
setStyleSheet(QStringLiteral("MusicPlayer { background: transparent; }"));
} else {
QtWin::resetExtendedFrame(this);
setAttribute(Qt::WA_TranslucentBackground, false);
setStyleSheet(QStringLiteral("MusicPlayer { background: %1; }").arg(QtWin::realColorizationColor().name()));
}
volumeButton->stylize();
}
}
//! [1]
void MusicPlayer::updateState(QMediaPlayer::State state)
{
if (state == QMediaPlayer::PlayingState) {
playButton->setToolTip(tr("Pause"));
playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause));
} else {
playButton->setToolTip(tr("Play"));
playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
}
}
static QString formatTime(qint64 timeMilliSeconds)
{
qint64 seconds = timeMilliSeconds / 1000;
const qint64 minutes = seconds / 60;
seconds -= minutes * 60;
return QStringLiteral("%1:%2")
.arg(minutes, 2, 10, QLatin1Char('0'))
.arg(seconds, 2, 10, QLatin1Char('0'));
}
void MusicPlayer::updatePosition(qint64 position)
{
positionSlider->setValue(position);
positionLabel->setText(formatTime(position));
}
void MusicPlayer::updateDuration(qint64 duration)
{
positionSlider->setRange(0, duration);
positionSlider->setEnabled(duration > 0);
positionSlider->setPageStep(duration / 10);
updateInfo();
}
void MusicPlayer::setPosition(int position)
{
// avoid seeking when the slider value change is triggered from updatePosition()
if (qAbs(mediaPlayer.position() - position) > 99)
mediaPlayer.setPosition(position);
}
void MusicPlayer::updateInfo()
{
QStringList info;
if (!fileName.isEmpty())
info.append(fileName);
if (mediaPlayer.isMetaDataAvailable()) {
QString author = mediaPlayer.metaData(QStringLiteral("Author")).toString();
if (!author.isEmpty())
info.append(author);
QString title = mediaPlayer.metaData(QStringLiteral("Title")).toString();
if (!title.isEmpty())
info.append(title);
}
info.append(formatTime(mediaPlayer.duration()));
infoLabel->setText(info.join(tr(" - ")));
}
void MusicPlayer::handleError()
{
playButton->setEnabled(false);
const QString errorString = mediaPlayer.errorString();
infoLabel->setText(errorString.isEmpty()
? tr("Unknown error #%1").arg(int(mediaPlayer.error()))
: tr("Error: %1").arg(errorString));
}
//! [2]
void MusicPlayer::updateTaskbar()
{
switch (mediaPlayer.state()) {
case QMediaPlayer::PlayingState:
taskbarButton->setOverlayIcon(style()->standardIcon(QStyle::SP_MediaPlay));
taskbarProgress->show();
taskbarProgress->resume();
break;
case QMediaPlayer::PausedState:
taskbarButton->setOverlayIcon(style()->standardIcon(QStyle::SP_MediaPause));
taskbarProgress->show();
taskbarProgress->pause();
break;
case QMediaPlayer::StoppedState:
taskbarButton->setOverlayIcon(style()->standardIcon(QStyle::SP_MediaStop));
taskbarProgress->hide();
break;
}
}
//! [2]
//! [3]
void MusicPlayer::updateThumbnailToolBar()
{
playToolButton->setEnabled(mediaPlayer.duration() > 0);
backwardToolButton->setEnabled(mediaPlayer.position() > 0);
forwardToolButton->setEnabled(mediaPlayer.position() < mediaPlayer.duration());
if (mediaPlayer.state() == QMediaPlayer::PlayingState) {
playToolButton->setToolTip(tr("Pause"));
playToolButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause));
} else {
playToolButton->setToolTip(tr("Play"));
playToolButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
}
}
//! [3]
void MusicPlayer::createWidgets()
{
playButton = new QToolButton(this);
playButton->setEnabled(false);
playButton->setToolTip(tr("Play"));
playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
connect(playButton, &QAbstractButton::clicked, this, &MusicPlayer::togglePlayback);
QAbstractButton *openButton = new QToolButton(this);
openButton->setText(tr("..."));
openButton->setToolTip(tr("Open a file..."));
openButton->setFixedSize(playButton->sizeHint());
connect(openButton, &QAbstractButton::clicked, this, &MusicPlayer::openFile);
volumeButton = new VolumeButton(this);
volumeButton->setToolTip(tr("Adjust volume"));
volumeButton->setVolume(mediaPlayer.volume());
connect(volumeButton, &VolumeButton::volumeChanged, &mediaPlayer, &QMediaPlayer::setVolume);
positionSlider = new QSlider(Qt::Horizontal, this);
positionSlider->setEnabled(false);
positionSlider->setToolTip(tr("Seek"));
connect(positionSlider, &QAbstractSlider::valueChanged, this, &MusicPlayer::setPosition);
infoLabel = new QLabel(this);
positionLabel = new QLabel(tr("00:00"), this);
positionLabel->setMinimumWidth(positionLabel->sizeHint().width());
QBoxLayout *controlLayout = new QHBoxLayout;
controlLayout->setMargin(0);
controlLayout->addWidget(openButton);
controlLayout->addWidget(playButton);
controlLayout->addWidget(positionSlider);
controlLayout->addWidget(positionLabel);
controlLayout->addWidget(volumeButton);
QBoxLayout *mainLayout = new QVBoxLayout(this);
mainLayout->addWidget(infoLabel);
mainLayout->addLayout(controlLayout);
}
void MusicPlayer::createShortcuts()
{
QShortcut *quitShortcut = new QShortcut(QKeySequence::Quit, this);
connect(quitShortcut, &QShortcut::activated, QCoreApplication::quit);
QShortcut *openShortcut = new QShortcut(QKeySequence::Open, this);
connect(openShortcut, &QShortcut::activated, this, &MusicPlayer::openFile);
QShortcut *toggleShortcut = new QShortcut(Qt::Key_Space, this);
connect(toggleShortcut, &QShortcut::activated, this, &MusicPlayer::togglePlayback);
QShortcut *forwardShortcut = new QShortcut(Qt::Key_Right, this);
connect(forwardShortcut, &QShortcut::activated, this, &MusicPlayer::seekForward);
QShortcut *backwardShortcut = new QShortcut(Qt::Key_Left, this);
connect(backwardShortcut, &QShortcut::activated, this, &MusicPlayer::seekBackward);
QShortcut *increaseShortcut = new QShortcut(Qt::Key_Up, this);
connect(increaseShortcut, &QShortcut::activated, volumeButton, &VolumeButton::increaseVolume);
QShortcut *decreaseShortcut = new QShortcut(Qt::Key_Down, this);
connect(decreaseShortcut, &QShortcut::activated, volumeButton, &VolumeButton::descreaseVolume);
}
//! [4]
void MusicPlayer::createJumpList()
{
QWinJumpList jumplist;
jumplist.recent()->setVisible(true);
}
//! [4]
//! [5]
void MusicPlayer::createTaskbar()
{
taskbarButton = new QWinTaskbarButton(this);
taskbarProgress = taskbarButton->progress();
connect(positionSlider, &QAbstractSlider::valueChanged, taskbarProgress, &QWinTaskbarProgress::setValue);
connect(positionSlider, &QAbstractSlider::rangeChanged, taskbarProgress, &QWinTaskbarProgress::setRange);
connect(&mediaPlayer, &QMediaPlayer::stateChanged, this, &MusicPlayer::updateTaskbar);
}
//! [5]
//! [6]
void MusicPlayer::createThumbnailToolBar()
{
thumbnailToolBar = new QWinThumbnailToolBar(this);
playToolButton = new QWinThumbnailToolButton(thumbnailToolBar);
playToolButton->setEnabled(false);
playToolButton->setToolTip(tr("Play"));
playToolButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay));
connect(playToolButton, &QWinThumbnailToolButton::clicked, this, &MusicPlayer::togglePlayback);
forwardToolButton = new QWinThumbnailToolButton(thumbnailToolBar);
forwardToolButton->setEnabled(false);
forwardToolButton->setToolTip(tr("Fast forward"));
forwardToolButton->setIcon(style()->standardIcon(QStyle::SP_MediaSeekForward));
connect(forwardToolButton, &QWinThumbnailToolButton::clicked, this, &MusicPlayer::seekForward);
backwardToolButton = new QWinThumbnailToolButton(thumbnailToolBar);
backwardToolButton->setEnabled(false);
backwardToolButton->setToolTip(tr("Rewind"));
backwardToolButton->setIcon(style()->standardIcon(QStyle::SP_MediaSeekBackward));
connect(backwardToolButton, &QWinThumbnailToolButton::clicked, this, &MusicPlayer::seekBackward);
thumbnailToolBar->addButton(backwardToolButton);
thumbnailToolBar->addButton(playToolButton);
thumbnailToolBar->addButton(forwardToolButton);
connect(&mediaPlayer, &QMediaPlayer::positionChanged, this, &MusicPlayer::updateThumbnailToolBar);
connect(&mediaPlayer, &QMediaPlayer::durationChanged, this, &MusicPlayer::updateThumbnailToolBar);
connect(&mediaPlayer, &QMediaPlayer::stateChanged, this, &MusicPlayer::updateThumbnailToolBar);
}
//! [6]