videoplayer.cpp Example File

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