videoplayer.cpp Example File

multimediawidgets/videographicsitem/videoplayer.cpp
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#include "videoplayer.h" #include <QtWidgets> #include <QVideoSurfaceFormat> #include <QGraphicsVideoItem> VideoPlayer::VideoPlayer(QWidget *parent) : QWidget(parent) , mediaPlayer(0, QMediaPlayer::VideoSurface) , videoItem(0) , playButton(0) , positionSlider(0) { const QRect screenGeometry = QApplication::desktop()->screenGeometry(this); videoItem = new QGraphicsVideoItem; videoItem->setSize(QSizeF(screenGeometry.width() / 3, screenGeometry.height() / 2)); QGraphicsScene *scene = new QGraphicsScene(this); QGraphicsView *graphicsView = new QGraphicsView(scene); scene->addItem(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); playButton = new QPushButton; playButton->setEnabled(false); playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); connect(playButton, &QAbstractButton::clicked, this, &VideoPlayer::play); positionSlider = new QSlider(Qt::Horizontal); positionSlider->setRange(0, 0); connect(positionSlider, &QAbstractSlider::sliderMoved, this, &VideoPlayer::setPosition); QBoxLayout *controlLayout = new QHBoxLayout; controlLayout->setMargin(0); controlLayout->addWidget(openButton); controlLayout->addWidget(playButton); controlLayout->addWidget(positionSlider); QBoxLayout *layout = new QVBoxLayout(this); layout->addWidget(graphicsView); layout->addWidget(rotateSlider); layout->addLayout(controlLayout); mediaPlayer.setVideoOutput(videoItem); connect(&mediaPlayer, &QMediaPlayer::stateChanged, this, &VideoPlayer::mediaStateChanged); connect(&mediaPlayer, &QMediaPlayer::positionChanged, this, &VideoPlayer::positionChanged); connect(&mediaPlayer, &QMediaPlayer::durationChanged, this, &VideoPlayer::durationChanged); } VideoPlayer::~VideoPlayer() { } QSize VideoPlayer::sizeHint() const { return (videoItem->size() * qreal(3) / qreal(2)).toSize(); } bool VideoPlayer::isPlayerAvailable() const { return mediaPlayer.isAvailable(); } void VideoPlayer::openFile() { QFileDialog fileDialog(this); fileDialog.setAcceptMode(QFileDialog::AcceptOpen); fileDialog.setWindowTitle(tr("Open Movie")); const QStringList supportedMimeTypes = 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) { mediaPlayer.setMedia(url); playButton->setEnabled(true); } void VideoPlayer::play() { switch(mediaPlayer.state()) { case QMediaPlayer::PlayingState: mediaPlayer.pause(); break; default: mediaPlayer.play(); break; } } void VideoPlayer::mediaStateChanged(QMediaPlayer::State state) { switch(state) { case QMediaPlayer::PlayingState: playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause)); break; default: playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); break; } } void VideoPlayer::positionChanged(qint64 position) { positionSlider->setValue(position); } void VideoPlayer::durationChanged(qint64 duration) { positionSlider->setRange(0, duration); } void VideoPlayer::setPosition(int position) { mediaPlayer.setPosition(position); } void VideoPlayer::rotateVideo(int angle) { //rotate around the center of video element qreal x = videoItem->boundingRect().width() / 2.0; qreal y = videoItem->boundingRect().height() / 2.0; videoItem->setTransform(QTransform().translate(x, y).rotate(angle).translate(-x, -y)); }