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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include "videoplayer.h" |
| |
| #include <QtWidgets> |
| #include <QGraphicsVideoItem> |
| |
| VideoPlayer::VideoPlayer(QWidget *parent) |
| : QWidget(parent) |
| { |
| m_mediaPlayer = new QMediaPlayer(this, QMediaPlayer::VideoSurface); |
| const QRect screenGeometry = QApplication::desktop()->screenGeometry(this); |
| m_videoItem = new QGraphicsVideoItem; |
| m_videoItem->setSize(QSizeF(screenGeometry.width() / 3, screenGeometry.height() / 2)); |
| |
| QGraphicsScene *scene = new QGraphicsScene(this); |
| QGraphicsView *graphicsView = new QGraphicsView(scene); |
| |
| scene->addItem(m_videoItem); |
| |
| QSlider *rotateSlider = new QSlider(Qt::Horizontal); |
| rotateSlider->setToolTip(tr("Rotate Video")); |
| rotateSlider->setRange(-180, 180); |
| rotateSlider->setValue(0); |
| |
| connect(rotateSlider, &QAbstractSlider::valueChanged, |
| this, &VideoPlayer::rotateVideo); |
| |
| QAbstractButton *openButton = new QPushButton(tr("Open...")); |
| connect(openButton, &QAbstractButton::clicked, this, &VideoPlayer::openFile); |
| |
| m_playButton = new QPushButton; |
| m_playButton->setEnabled(false); |
| m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); |
| |
| connect(m_playButton, &QAbstractButton::clicked, this, &VideoPlayer::play); |
| |
| m_positionSlider = new QSlider(Qt::Horizontal); |
| m_positionSlider->setRange(0, 0); |
| |
| connect(m_positionSlider, &QAbstractSlider::sliderMoved, |
| this, &VideoPlayer::setPosition); |
| |
| QBoxLayout *controlLayout = new QHBoxLayout; |
| controlLayout->setContentsMargins(0, 0, 0, 0); |
| controlLayout->addWidget(openButton); |
| controlLayout->addWidget(m_playButton); |
| controlLayout->addWidget(m_positionSlider); |
| |
| QBoxLayout *layout = new QVBoxLayout(this); |
| layout->addWidget(graphicsView); |
| layout->addWidget(rotateSlider); |
| layout->addLayout(controlLayout); |
| |
| m_mediaPlayer->setVideoOutput(m_videoItem); |
| connect(m_mediaPlayer, &QMediaPlayer::stateChanged, |
| this, &VideoPlayer::mediaStateChanged); |
| connect(m_mediaPlayer, &QMediaPlayer::positionChanged, this, &VideoPlayer::positionChanged); |
| connect(m_mediaPlayer, &QMediaPlayer::durationChanged, this, &VideoPlayer::durationChanged); |
| } |
| |
| VideoPlayer::~VideoPlayer() |
| { |
| } |
| |
| QSize VideoPlayer::sizeHint() const |
| { |
| return (m_videoItem->size() * qreal(3) / qreal(2)).toSize(); |
| } |
| |
| bool VideoPlayer::isPlayerAvailable() const |
| { |
| return m_mediaPlayer->isAvailable(); |
| } |
| |
| void VideoPlayer::openFile() |
| { |
| QFileDialog fileDialog(this); |
| fileDialog.setAcceptMode(QFileDialog::AcceptOpen); |
| fileDialog.setWindowTitle(tr("Open Movie")); |
| const QStringList supportedMimeTypes = m_mediaPlayer->supportedMimeTypes(); |
| if (!supportedMimeTypes.isEmpty()) |
| fileDialog.setMimeTypeFilters(supportedMimeTypes); |
| fileDialog.setDirectory(QStandardPaths::standardLocations(QStandardPaths::MoviesLocation).value(0, QDir::homePath())); |
| if (fileDialog.exec() == QDialog::Accepted) |
| load(fileDialog.selectedUrls().constFirst()); |
| } |
| |
| void VideoPlayer::load(const QUrl &url) |
| { |
| m_mediaPlayer->setMedia(url); |
| m_playButton->setEnabled(true); |
| } |
| |
| void VideoPlayer::play() |
| { |
| switch (m_mediaPlayer->state()) { |
| case QMediaPlayer::PlayingState: |
| m_mediaPlayer->pause(); |
| break; |
| default: |
| m_mediaPlayer->play(); |
| break; |
| } |
| } |
| |
| void VideoPlayer::mediaStateChanged(QMediaPlayer::State state) |
| { |
| switch(state) { |
| case QMediaPlayer::PlayingState: |
| m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause)); |
| break; |
| default: |
| m_playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); |
| break; |
| } |
| } |
| |
| void VideoPlayer::positionChanged(qint64 position) |
| { |
| m_positionSlider->setValue(position); |
| } |
| |
| void VideoPlayer::durationChanged(qint64 duration) |
| { |
| m_positionSlider->setRange(0, duration); |
| } |
| |
| void VideoPlayer::setPosition(int position) |
| { |
| m_mediaPlayer->setPosition(position); |
| } |
| |
| |
| void VideoPlayer::rotateVideo(int angle) |
| { |
| //rotate around the center of video element |
| qreal x = m_videoItem->boundingRect().width() / 2.0; |
| qreal y = m_videoItem->boundingRect().height() / 2.0; |
| m_videoItem->setTransform(QTransform().translate(x, y).rotate(angle).translate(-x, -y)); |
| } |