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Diffstat (limited to 'examples/winextras/musicplayer/musicplayer.cpp')
| -rw-r--r-- | examples/winextras/musicplayer/musicplayer.cpp | 362 |
1 files changed, 362 insertions, 0 deletions
diff --git a/examples/winextras/musicplayer/musicplayer.cpp b/examples/winextras/musicplayer/musicplayer.cpp new file mode 100644 index 0000000..f9bc0ec --- /dev/null +++ b/examples/winextras/musicplayer/musicplayer.cpp @@ -0,0 +1,362 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names +** of its contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "musicplayer.h" +#include "volumebutton.h" + +#include <QtWidgets> +#include <QtWinExtras> + +MusicPlayer::MusicPlayer(QWidget *parent) : QWidget(parent), + taskbarButton(0), taskbarProgress(0), thumbnailToolBar(0), + playToolButton(0), forwardToolButton(0), backwardToolButton(0), + mediaPlayer(0), playButton(0), volumeButton(0), + positionSlider(0), positionLabel(0), infoLabel(0) +{ + createWidgets(); + createShortcuts(); + createJumpList(); + createTaskbar(); + createThumbnailToolBar(); + + connect(&mediaPlayer, SIGNAL(positionChanged(qint64)), this, SLOT(updatePosition(qint64))); + connect(&mediaPlayer, SIGNAL(durationChanged(qint64)), this, SLOT(updateDuration(qint64))); + connect(&mediaPlayer, SIGNAL(metaDataAvailableChanged(bool)), this, SLOT(updateInfo())); + connect(&mediaPlayer, SIGNAL(error(QMediaPlayer::Error)), this, SLOT(handleError())); + connect(&mediaPlayer, SIGNAL(stateChanged(QMediaPlayer::State)), + this, SLOT(updateState(QMediaPlayer::State))); + + stylize(); +} + +void MusicPlayer::openFile() +{ + static QString path = QDir::homePath(); + QString filePath = QFileDialog::getOpenFileName(this, tr("Open File"), path, tr("MP3 files (*.mp3);;All files (*.*)")); + if (!filePath.isEmpty()) { + path = filePath; + playFile(filePath); + } +} + +void MusicPlayer::playFile(const QString &filePath) +{ + playButton->setEnabled(true); + infoLabel->setText(QFileInfo(filePath).fileName()); + + mediaPlayer.setMedia(QUrl::fromLocalFile(filePath)); + 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] + +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 (QtWin::isCompositionEnabled()) { + QtWin::extendFrameIntoClientArea(this, -1, -1, -1, -1); + setAttribute(Qt::WA_TranslucentBackground, true); + setAttribute(Qt::WA_NoSystemBackground, false); + setStyleSheet("MusicPlayer { background: transparent; }"); + } else { + QtWin::resetExtendedFrame(this); + setAttribute(Qt::WA_TranslucentBackground, false); + setStyleSheet(QString("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)); + } +} + +void MusicPlayer::updatePosition(qint64 position) +{ + positionSlider->setValue(position); + + QTime duration(0, position / 60000, qRound((position % 60000) / 1000.0)); + positionLabel->setText(duration.toString(tr("mm:ss"))); +} + +void MusicPlayer::updateDuration(qint64 duration) +{ + positionSlider->setRange(0, duration); + positionSlider->setEnabled(duration > 0); + positionSlider->setPageStep(duration / 10); +} + +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; + 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 MusicPlayer::handleError() +{ + playButton->setEnabled(false); + infoLabel->setText(tr("Error: %1").arg(mediaPlayer.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, SIGNAL(clicked()), this, SLOT(togglePlayback())); + + QAbstractButton *openButton = new QToolButton(this); + openButton->setText(tr("...")); + openButton->setToolTip(tr("Open a file...")); + openButton->setFixedSize(playButton->sizeHint()); + connect(openButton, SIGNAL(clicked()), this, SLOT(openFile())); + + volumeButton = new VolumeButton(this); + volumeButton->setToolTip(tr("Adjust volume")); + volumeButton->setVolume(mediaPlayer.volume()); + connect(volumeButton, SIGNAL(volumeChanged(int)), &mediaPlayer, SLOT(setVolume(int))); + + 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()); + + 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, SIGNAL(activated()), qApp, SLOT(quit())); + + QShortcut *openShortcut = new QShortcut(QKeySequence::Open, this); + connect(openShortcut, SIGNAL(activated()), this, SLOT(openFile())); + + QShortcut *toggleShortcut = new QShortcut(Qt::Key_Space, this); + connect(toggleShortcut, SIGNAL(activated()), this, SLOT(togglePlayback())); + + QShortcut *forwardShortcut = new QShortcut(Qt::Key_Right, this); + connect(forwardShortcut, SIGNAL(activated()), this, SLOT(seekForward())); + + QShortcut *backwardShortcut = new QShortcut(Qt::Key_Left, this); + connect(backwardShortcut, SIGNAL(activated()), this, SLOT(seekBackward())); + + QShortcut *increaseShortcut = new QShortcut(Qt::Key_Up, this); + connect(increaseShortcut, SIGNAL(activated()), volumeButton, SLOT(increaseVolume())); + + QShortcut *decreaseShortcut = new QShortcut(Qt::Key_Down, this); + connect(decreaseShortcut, SIGNAL(activated()), volumeButton, SLOT(descreaseVolume())); +} + +//! [4] +void MusicPlayer::createJumpList() +{ + QWinJumpList jumplist; + jumplist.recent()->setVisible(true); +} +//! [4] + +//! [5] +void MusicPlayer::createTaskbar() +{ + taskbarButton = new QWinTaskbarButton(this); + taskbarButton->setWindow(windowHandle()); + + taskbarProgress = taskbarButton->progress(); + connect(positionSlider, SIGNAL(valueChanged(int)), taskbarProgress, SLOT(setValue(int))); + connect(positionSlider, SIGNAL(rangeChanged(int, int)), taskbarProgress, SLOT(setRange(int, int))); + + connect(&mediaPlayer, SIGNAL(stateChanged(QMediaPlayer::State)), this, SLOT(updateTaskbar())); +} +//! [5] + +//! [6] +void MusicPlayer::createThumbnailToolBar() +{ + thumbnailToolBar = new QWinThumbnailToolBar(this); + thumbnailToolBar->setWindow(windowHandle()); + + playToolButton = new QWinThumbnailToolButton(thumbnailToolBar); + playToolButton->setEnabled(false); + playToolButton->setToolTip(tr("Play")); + playToolButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); + connect(playToolButton, SIGNAL(clicked()), this, SLOT(togglePlayback())); + + forwardToolButton = new QWinThumbnailToolButton(thumbnailToolBar); + forwardToolButton->setEnabled(false); + forwardToolButton->setToolTip(tr("Fast forward")); + forwardToolButton->setIcon(style()->standardIcon(QStyle::SP_MediaSeekForward)); + connect(forwardToolButton, SIGNAL(clicked()), this, SLOT(seekForward())); + + backwardToolButton = new QWinThumbnailToolButton(thumbnailToolBar); + backwardToolButton->setEnabled(false); + backwardToolButton->setToolTip(tr("Rewind")); + backwardToolButton->setIcon(style()->standardIcon(QStyle::SP_MediaSeekBackward)); + connect(backwardToolButton, SIGNAL(clicked()), this, SLOT(seekBackward())); + + thumbnailToolBar->addButton(backwardToolButton); + thumbnailToolBar->addButton(playToolButton); + thumbnailToolBar->addButton(forwardToolButton); + + connect(&mediaPlayer, SIGNAL(positionChanged(qint64)), this, SLOT(updateThumbnailToolBar())); + connect(&mediaPlayer, SIGNAL(durationChanged(qint64)), this, SLOT(updateThumbnailToolBar())); + connect(&mediaPlayer, SIGNAL(stateChanged(QMediaPlayer::State)), this, SLOT(updateThumbnailToolBar())); +} +//! [6] |