videoplayer.cpp Example File

multimediawidgets/videowidget/videoplayer.cpp
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#include "videoplayer.h" #include <QtWidgets> #include <qvideowidget.h> #include <qvideosurfaceformat.h> VideoPlayer::VideoPlayer(QWidget *parent) : QWidget(parent) , mediaPlayer(0, QMediaPlayer::VideoSurface) , playButton(0) , positionSlider(0) , errorLabel(0) { QVideoWidget *videoWidget = new QVideoWidget; 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); errorLabel = new QLabel; errorLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Maximum); QBoxLayout *controlLayout = new QHBoxLayout; controlLayout->setMargin(0); controlLayout->addWidget(openButton); controlLayout->addWidget(playButton); controlLayout->addWidget(positionSlider); QBoxLayout *layout = new QVBoxLayout; layout->addWidget(videoWidget); layout->addLayout(controlLayout); layout->addWidget(errorLabel); setLayout(layout); mediaPlayer.setVideoOutput(videoWidget); connect(&mediaPlayer, &QMediaPlayer::stateChanged, this, &VideoPlayer::mediaStateChanged); connect(&mediaPlayer, &QMediaPlayer::positionChanged, this, &VideoPlayer::positionChanged); connect(&mediaPlayer, &QMediaPlayer::durationChanged, this, &VideoPlayer::durationChanged); typedef void (QMediaPlayer::*ErrorSignal)(QMediaPlayer::Error); connect(&mediaPlayer, static_cast<ErrorSignal>(&QMediaPlayer::error), this, &VideoPlayer::handleError); } VideoPlayer::~VideoPlayer() { } void VideoPlayer::openFile() { QFileDialog fileDialog(this); fileDialog.setAcceptMode(QFileDialog::AcceptOpen); fileDialog.setWindowTitle(tr("Open Movie")); 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) setUrl(fileDialog.selectedUrls().constFirst()); } void VideoPlayer::setUrl(const QUrl &url) { errorLabel->setText(QString()); setWindowFilePath(url.isLocalFile() ? url.toLocalFile() : QString()); 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::handleError() { playButton->setEnabled(false); const QString errorString = mediaPlayer.errorString(); QString message = "Error: "; if (errorString.isEmpty()) message += " #" + QString::number(int(mediaPlayer.error())); else message += errorString; errorLabel->setText(message); }