A music player example

Change-Id: Ie28baa6373a8852b31137ed3c076ab4309d1c98f
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

16 files changed, 907 insertions, 0 deletions

diff --git a/examples/winextras/musicplayer/doc/images/qtwinextras-musicplayer-composited.png b/examples/winextras/musicplayer/doc/images/qtwinextras-musicplayer-composited.png
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diff --git a/examples/winextras/musicplayer/doc/images/qtwinextras-musicplayer-non-composited.png b/examples/winextras/musicplayer/doc/images/qtwinextras-musicplayer-non-composited.png
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diff --git a/examples/winextras/musicplayer/doc/images/qtwinextras-musicplayer-taskbar.png b/examples/winextras/musicplayer/doc/images/qtwinextras-musicplayer-taskbar.png
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diff --git a/examples/winextras/musicplayer/doc/images/qtwinextras-musicplayer-thumbnail.png b/examples/winextras/musicplayer/doc/images/qtwinextras-musicplayer-thumbnail.png
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diff --git a/examples/winextras/musicplayer/doc/src/qtwinextras-musicplayer.qdoc b/examples/winextras/musicplayer/doc/src/qtwinextras-musicplayer.qdoc
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file.  Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: http://www.gnu.org/copyleft/fdl.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \example musicplayer
+    \title Music Player
+    \ingroup examples-qtwinextras
+    \brief Demonstrates managing Windows DWM features, jump lists,
+           taskbar button overlay, and thumbnail toolbar.
+
+    \image qtwinextras-musicplayer-composited.png Screenshot of the Music Player example
+
+    The Music Player example demonstrates how to use the various features
+    provided by the QtWinExtras module.
+
+    \note The example uses QMediaPlayer from the QtMultimedia module to play
+    the music, but this article focuses on the parts where QtWinExtras features
+    are used.
+
+    \section1 DWM Features
+
+    The example uses Windows DWM (Desktop Window Manager) features to visually
+    integrate the window content to the window frame and to make the main window
+    and the volume popup translucent and blurred.
+
+    The example applies a different look based on whether composition is enabled
+    or not. When composition is enabled, the main window is made translucent and
+    the window frame is extended to the client area to make the window content
+    integrate seamlessly to the window frame as shown above. When composition
+    is disabled, the colorization color is used as a background color. The
+    following screenshot illustrates how the Music Player example looks when
+    composition is disabled.
+
+    \image qtwinextras-musicplayer-non-composited.png Screenshot of the Music Player example
+
+    The respective code is a combination of extending or resetting the system
+    frame, adjusting the necessary QWidget attributes, and setting an appropriate
+    style sheet to achieve the desired look.
+
+    \snippet musicplayer/musicplayer.cpp 1
+
+    The volume popup does not have a window frame so it is enough to make the
+    popup blurred when composition is enabled. Additionally, a style sheet is
+    applied to get a border that follows the colorization color. Just like for
+    the main window, when composition is disabled, the colorization color is
+    used as a background color.
+
+    \snippet musicplayer/volumebutton.cpp 0
+
+    The example application respects the user's composition settings, reacts
+    to dynamic composition changes, and looks solid regardless of whether
+    composition is enabled or not. It accomplishes this by catching
+    QWinEvent::CompositionChange and QWinEvent::ColorizationChange events
+    and adjusting its looks accordingly.
+
+    \snippet musicplayer/musicplayer.cpp 0
+
+    \section1 Jump List
+
+    The example creates a custom jump list to provide the user with fast
+    access to recently played music files.
+
+    \snippet musicplayer/musicplayer.cpp 4
+
+    To enable the application jump list to show the desired recent files,
+    the corresponding file types are registered using the following helper
+    function.
+
+    \snippet musicplayer/main.cpp 0
+
+    \section1 Taskbar Overlay and Progress
+
+    The example uses Windows Taskbar for two things; it sets an overlay icon
+    that represents the current music playback state, and it indicates the
+    playback progress in the taskbar button.
+
+    \image qtwinextras-musicplayer-taskbar.png Screenshot of the Music Player taskbar
+
+    The following snippet shows how the taskbar button is prepared. The playback
+    progress is wired directly to the taskbar progress indicator by using signals
+    and slots.
+
+    \snippet musicplayer/musicplayer.cpp 5
+
+    The overlay icon and the progress indicator are updated whenever the state
+    of the music playback changes.
+
+    \snippet musicplayer/musicplayer.cpp 2
+
+    \section1 Thumbnail Toolbar
+
+    \image qtwinextras-musicplayer-thumbnail.png Screenshot of the Music Player thumbnail
+
+    The Windows Thumbnail Toolbar is used for providing basic music playback
+    controls. These controls can be used to control the application without
+    having to activate the application.
+
+    \snippet musicplayer/musicplayer.cpp 6
+
+    The buttons in the thumbnail toolbar are updated accordingly whenever the state
+    of the music playback changes.
+
+    \snippet musicplayer/musicplayer.cpp 3
+*/
diff --git a/examples/winextras/musicplayer/images/musicplayer.ico b/examples/winextras/musicplayer/images/musicplayer.ico
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index 0000000..fef1dee
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+++ b/examples/winextras/musicplayer/images/musicplayer.ico
diff --git a/examples/winextras/musicplayer/images/musicplayer.png b/examples/winextras/musicplayer/images/musicplayer.png
new file mode 100644
index 0000000..7d3e97e
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+++ b/examples/winextras/musicplayer/images/musicplayer.png
diff --git a/examples/winextras/musicplayer/main.cpp b/examples/winextras/musicplayer/main.cpp
new file mode 100644
index 0000000..cc3771a
--- /dev/null
+++ b/examples/winextras/musicplayer/main.cpp
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+/****************************************************************************
+**
+** 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 <QApplication>
+#include <QFileInfo>
+#include <QSettings>
+#include <QIcon>
+#include <QDir>
+
+//! [0]
+static void associateFileTypes(const QStringList &fileTypes)
+{
+    QString displayName = QGuiApplication::applicationDisplayName();
+    QString filePath = QCoreApplication::applicationFilePath();
+    QString fileName = QFileInfo(filePath).fileName();
+
+    QSettings settings("HKEY_CURRENT_USER\\Software\\Classes\\Applications\\" + fileName, QSettings::NativeFormat);
+    settings.setValue("FriendlyAppName", displayName);
+
+    settings.beginGroup("SupportedTypes");
+    foreach (const QString& fileType, fileTypes)
+        settings.setValue(fileType, QString());
+    settings.endGroup();
+
+    settings.beginGroup("shell");
+    settings.beginGroup("open");
+    settings.setValue("FriendlyAppName", displayName);
+    settings.beginGroup("Command");
+    settings.setValue(".", QChar('"') + QDir::toNativeSeparators(filePath) + QString("\" \"%1\""));
+}
+//! [0]
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    app.setApplicationName("MusicPlayer");
+    app.setOrganizationName("QtWinExtras");
+    app.setOrganizationDomain("qt-project.org");
+    app.setApplicationDisplayName("QtWinExtras Music Player");
+    app.setWindowIcon(QIcon(":/logo.png"));
+
+    associateFileTypes(QStringList(".mp3"));
+
+    MusicPlayer player;
+    if (argc > 1)
+        player.playFile(app.arguments().value(1));
+    player.resize(300, 60);
+    player.show();
+
+    return app.exec();
+}
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]
diff --git a/examples/winextras/musicplayer/musicplayer.h b/examples/winextras/musicplayer/musicplayer.h
new file mode 100644
index 0000000..aae8781
--- /dev/null
+++ b/examples/winextras/musicplayer/musicplayer.h
@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MUSICPLAYER_H
+#define MUSICPLAYER_H
+
+#include <QWidget>
+#include <QMediaPlayer>
+
+class VolumeButton;
+
+QT_FORWARD_DECLARE_CLASS(QLabel)
+QT_FORWARD_DECLARE_CLASS(QSlider)
+QT_FORWARD_DECLARE_CLASS(QAbstractButton)
+QT_FORWARD_DECLARE_CLASS(QWinTaskbarButton)
+QT_FORWARD_DECLARE_CLASS(QWinTaskbarProgress)
+QT_FORWARD_DECLARE_CLASS(QWinThumbnailToolBar)
+QT_FORWARD_DECLARE_CLASS(QWinThumbnailToolButton)
+
+class MusicPlayer : public QWidget
+{
+    Q_OBJECT
+public:
+    MusicPlayer(QWidget *parent = 0);
+
+public slots:
+    void openFile();
+    void playFile(const QString& filePath);
+    void togglePlayback();
+    void seekForward();
+    void seekBackward();
+
+protected:
+    bool event(QEvent *event);
+    void mousePressEvent(QMouseEvent *event);
+    void mouseMoveEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+
+private slots:
+    void stylize();
+    void updateState(QMediaPlayer::State state);
+    void updatePosition(qint64 position);
+    void updateDuration(qint64 duration);
+    void setPosition(int position);
+    void updateInfo();
+    void handleError();
+
+    void updateTaskbar();
+    void updateThumbnailToolBar();
+
+private:
+    void createWidgets();
+    void createShortcuts();
+    void createJumpList();
+    void createTaskbar();
+    void createThumbnailToolBar();
+
+    QWinTaskbarButton* taskbarButton;
+    QWinTaskbarProgress* taskbarProgress;
+    QWinThumbnailToolBar* thumbnailToolBar;
+    QWinThumbnailToolButton *playToolButton;
+    QWinThumbnailToolButton *forwardToolButton;
+    QWinThumbnailToolButton *backwardToolButton;
+
+    QMediaPlayer mediaPlayer;
+    QAbstractButton *playButton;
+    VolumeButton *volumeButton;
+    QSlider *positionSlider;
+    QLabel *positionLabel;
+    QLabel *infoLabel;
+    QPoint offset;
+};
+
+#endif // MUSICPLAYER_H
diff --git a/examples/winextras/musicplayer/musicplayer.pro b/examples/winextras/musicplayer/musicplayer.pro
new file mode 100644
index 0000000..73968cf
--- /dev/null
+++ b/examples/winextras/musicplayer/musicplayer.pro
@@ -0,0 +1,21 @@
+TEMPLATE = app
+TARGET = musicplayer
+
+QT += widgets multimedia winextras
+
+HEADERS = \
+    musicplayer.h \
+    volumebutton.h
+
+SOURCES = \
+    main.cpp \
+    musicplayer.cpp \
+    volumebutton.cpp
+
+RESOURCES += \
+    musicplayer.qrc
+
+RC_ICONS = images/musicplayer.ico
+
+target.path = $$[QT_INSTALL_EXAMPLES]/winextras/musicplayer
+INSTALLS += target
diff --git a/examples/winextras/musicplayer/musicplayer.qrc b/examples/winextras/musicplayer/musicplayer.qrc
new file mode 100644
index 0000000..b1a0029
--- /dev/null
+++ b/examples/winextras/musicplayer/musicplayer.qrc
@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file alias="musicplayer.png">images/musicplayer.png</file>
+</qresource>
+</RCC>
diff --git a/examples/winextras/musicplayer/musicplayer.rc b/examples/winextras/musicplayer/musicplayer.rc
new file mode 100644
index 0000000..00a51ee
--- /dev/null
+++ b/examples/winextras/musicplayer/musicplayer.rc
@@ -0,0 +1 @@
+IDI_ICON1               ICON    DISCARDABLE     "images\\musicplayer.ico"
diff --git a/examples/winextras/musicplayer/volumebutton.cpp b/examples/winextras/musicplayer/volumebutton.cpp
new file mode 100644
index 0000000..5fe940c
--- /dev/null
+++ b/examples/winextras/musicplayer/volumebutton.cpp
@@ -0,0 +1,112 @@
+/****************************************************************************
+**
+** 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 "volumebutton.h"
+
+#include <QtWidgets>
+#include <QtWinExtras>
+
+VolumeButton::VolumeButton(QWidget *parent) :
+    QToolButton(parent), menu(0), label(0), slider(0)
+{
+    setIcon(style()->standardIcon(QStyle::SP_MediaVolume));
+    setPopupMode(QToolButton::InstantPopup);
+
+    QWidget *popup = new QWidget(this);
+
+    slider = new QSlider(Qt::Horizontal, popup);
+    slider->setRange(0, 100);
+    connect(slider, SIGNAL(valueChanged(int)), this, SIGNAL(volumeChanged(int)));
+
+    label = new QLabel(popup);
+    label->setAlignment(Qt::AlignCenter);
+    label->setNum(100);
+    label->setMinimumWidth(label->sizeHint().width());
+    connect(slider, SIGNAL(valueChanged(int)), label, SLOT(setNum(int)));
+
+    QBoxLayout *popupLayout = new QHBoxLayout(popup);
+    popupLayout->setMargin(2);
+    popupLayout->addWidget(slider);
+    popupLayout->addWidget(label);
+
+    QWidgetAction *action = new QWidgetAction(this);
+    action->setDefaultWidget(popup);
+
+    menu = new QMenu(this);
+    menu->addAction(action);
+    setMenu(menu);
+
+    stylize();
+}
+
+void VolumeButton::increaseVolume()
+{
+    slider->triggerAction(QSlider::SliderPageStepAdd);
+}
+
+void VolumeButton::descreaseVolume()
+{
+    slider->triggerAction(QSlider::SliderPageStepSub);
+}
+
+int VolumeButton::volume() const
+{
+    return slider->value();
+}
+
+void VolumeButton::setVolume(int volume)
+{
+    slider->setValue(volume);
+}
+
+//! [0]
+void VolumeButton::stylize()
+{
+    if (QtWin::isCompositionEnabled()) {
+        QtWin::enableBlurBehindWindow(menu);
+        QString css("QMenu { border: 1px solid %1; border-radius: 2px; background: transparent; }");
+        menu->setStyleSheet(css.arg(QtWin::realColorizationColor().name()));
+    } else {
+        QtWin::disableBlurBehindWindow(menu);
+        QString css("QMenu { border: 1px solid black; background: %1; }");
+        menu->setStyleSheet(css.arg(QtWin::realColorizationColor().name()));
+    }
+}
+//! [0]
diff --git a/examples/winextras/musicplayer/volumebutton.h b/examples/winextras/musicplayer/volumebutton.h
new file mode 100644
index 0000000..4267273
--- /dev/null
+++ b/examples/winextras/musicplayer/volumebutton.h
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef VOLUMEBUTTON_H
+#define VOLUMEBUTTON_H
+
+#include <QToolButton>
+
+QT_FORWARD_DECLARE_CLASS(QMenu)
+QT_FORWARD_DECLARE_CLASS(QLabel)
+QT_FORWARD_DECLARE_CLASS(QSlider)
+
+class VolumeButton : public QToolButton
+{
+    Q_OBJECT
+    Q_PROPERTY(int volume READ volume WRITE setVolume NOTIFY volumeChanged)
+
+public:
+    VolumeButton(QWidget *parent = 0);
+
+    int volume() const;
+
+public slots:
+    void increaseVolume();
+    void descreaseVolume();
+    void setVolume(int volume);
+    void stylize();
+
+signals:
+    void volumeChanged(int volume);
+
+private:
+    QMenu *menu;
+    QLabel *label;
+    QSlider *slider;
+};
+
+#endif // VOLUMEBUTTON_H
diff --git a/examples/winextras/winextras.pro b/examples/winextras/winextras.pro
index faa2909..17d9cf3 100644
--- a/examples/winextras/winextras.pro
+++ b/examples/winextras/winextras.pro
@@ -5,4 +5,6 @@ win32:{
         dwmfeatures \
         jumplistexample
     EXAMPLE_FILES += quickdwm
+
+    qtHaveModule(widgets):qtHaveModule(multimedia): SUBDIRS += musicplayer
 }