movieplayer.cpp Example File

widgets/movie/movieplayer.cpp
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#include <QtWidgets> #include "movieplayer.h" MoviePlayer::MoviePlayer(QWidget *parent) : QWidget(parent) { movie = new QMovie(this); movie->setCacheMode(QMovie::CacheAll); movieLabel = new QLabel(tr("No movie loaded")); movieLabel->setAlignment(Qt::AlignCenter); movieLabel->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); movieLabel->setBackgroundRole(QPalette::Dark); movieLabel->setAutoFillBackground(true); currentMovieDirectory = "movies"; createControls(); createButtons(); connect(movie, SIGNAL(frameChanged(int)), this, SLOT(updateFrameSlider())); connect(movie, SIGNAL(stateChanged(QMovie::MovieState)), this, SLOT(updateButtons())); connect(fitCheckBox, SIGNAL(clicked()), this, SLOT(fitToWindow())); connect(frameSlider, SIGNAL(valueChanged(int)), this, SLOT(goToFrame(int))); connect(speedSpinBox, SIGNAL(valueChanged(int)), movie, SLOT(setSpeed(int))); mainLayout = new QVBoxLayout; mainLayout->addWidget(movieLabel); mainLayout->addLayout(controlsLayout); mainLayout->addLayout(buttonsLayout); setLayout(mainLayout); updateFrameSlider(); updateButtons(); setWindowTitle(tr("Movie Player")); resize(400, 400); } void MoviePlayer::open() { QString fileName = QFileDialog::getOpenFileName(this, tr("Open a Movie"), currentMovieDirectory); if (!fileName.isEmpty()) openFile(fileName); } void MoviePlayer::openFile(const QString &fileName) { currentMovieDirectory = QFileInfo(fileName).path(); movie->stop(); movieLabel->setMovie(movie); movie->setFileName(fileName); movie->start(); updateFrameSlider(); updateButtons(); } void MoviePlayer::goToFrame(int frame) { movie->jumpToFrame(frame); } void MoviePlayer::fitToWindow() { movieLabel->setScaledContents(fitCheckBox->isChecked()); } void MoviePlayer::updateFrameSlider() { bool hasFrames = (movie->currentFrameNumber() >= 0); if (hasFrames) { if (movie->frameCount() > 0) { frameSlider->setMaximum(movie->frameCount() - 1); } else { if (movie->currentFrameNumber() > frameSlider->maximum()) frameSlider->setMaximum(movie->currentFrameNumber()); } frameSlider->setValue(movie->currentFrameNumber()); } else { frameSlider->setMaximum(0); } frameLabel->setEnabled(hasFrames); frameSlider->setEnabled(hasFrames); } void MoviePlayer::updateButtons() { playButton->setEnabled(movie->isValid() && movie->frameCount() != 1 && movie->state() == QMovie::NotRunning); pauseButton->setEnabled(movie->state() != QMovie::NotRunning); pauseButton->setChecked(movie->state() == QMovie::Paused); stopButton->setEnabled(movie->state() != QMovie::NotRunning); } void MoviePlayer::createControls() { fitCheckBox = new QCheckBox(tr("Fit to Window")); frameLabel = new QLabel(tr("Current frame:")); frameSlider = new QSlider(Qt::Horizontal); frameSlider->setTickPosition(QSlider::TicksBelow); frameSlider->setTickInterval(10); speedLabel = new QLabel(tr("Speed:")); speedSpinBox = new QSpinBox; speedSpinBox->setRange(1, 9999); speedSpinBox->setValue(100); speedSpinBox->setSuffix(tr("%")); controlsLayout = new QGridLayout; controlsLayout->addWidget(fitCheckBox, 0, 0, 1, 2); controlsLayout->addWidget(frameLabel, 1, 0); controlsLayout->addWidget(frameSlider, 1, 1, 1, 2); controlsLayout->addWidget(speedLabel, 2, 0); controlsLayout->addWidget(speedSpinBox, 2, 1); } void MoviePlayer::createButtons() { QSize iconSize(36, 36); openButton = new QToolButton; openButton->setIcon(style()->standardIcon(QStyle::SP_DialogOpenButton)); openButton->setIconSize(iconSize); openButton->setToolTip(tr("Open File")); connect(openButton, SIGNAL(clicked()), this, SLOT(open())); playButton = new QToolButton; playButton->setIcon(style()->standardIcon(QStyle::SP_MediaPlay)); playButton->setIconSize(iconSize); playButton->setToolTip(tr("Play")); connect(playButton, SIGNAL(clicked()), movie, SLOT(start())); pauseButton = new QToolButton; pauseButton->setCheckable(true); pauseButton->setIcon(style()->standardIcon(QStyle::SP_MediaPause)); pauseButton->setIconSize(iconSize); pauseButton->setToolTip(tr("Pause")); connect(pauseButton, SIGNAL(clicked(bool)), movie, SLOT(setPaused(bool))); stopButton = new QToolButton; stopButton->setIcon(style()->standardIcon(QStyle::SP_MediaStop)); stopButton->setIconSize(iconSize); stopButton->setToolTip(tr("Stop")); connect(stopButton, SIGNAL(clicked()), movie, SLOT(stop())); quitButton = new QToolButton; quitButton->setIcon(style()->standardIcon(QStyle::SP_DialogCloseButton)); quitButton->setIconSize(iconSize); quitButton->setToolTip(tr("Quit")); connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); buttonsLayout = new QHBoxLayout; buttonsLayout->addStretch(); buttonsLayout->addWidget(openButton); buttonsLayout->addWidget(playButton); buttonsLayout->addWidget(pauseButton); buttonsLayout->addWidget(stopButton); buttonsLayout->addWidget(quitButton); buttonsLayout->addStretch(); }