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<pre> /****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
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** This file is part of the example classes of the Qt Toolkit.
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#include <QtGui>
#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(QIcon(":/images/open.png"));
openButton->setIconSize(iconSize);
openButton->setToolTip(tr("Open File"));
connect(openButton, SIGNAL(clicked()), this, SLOT(open()));
playButton = new QToolButton;
playButton->setIcon(QIcon(":/images/play.png"));
playButton->setIconSize(iconSize);
playButton->setToolTip(tr("Play"));
connect(playButton, SIGNAL(clicked()), movie, SLOT(start()));
pauseButton = new QToolButton;
pauseButton->setCheckable(true);
pauseButton->setIcon(QIcon(":/images/pause.png"));
pauseButton->setIconSize(iconSize);
pauseButton->setToolTip(tr("Pause"));
connect(pauseButton, SIGNAL(clicked(bool)), movie, SLOT(setPaused(bool)));
stopButton = new QToolButton;
stopButton->setIcon(QIcon(":/images/stop.png"));
stopButton->setIconSize(iconSize);
stopButton->setToolTip(tr("Stop"));
connect(stopButton, SIGNAL(clicked()), movie, SLOT(stop()));
quitButton = new QToolButton;
quitButton->setIcon(QIcon(":/images/quit.png"));
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();
}</pre>
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