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authorQt by Nokia <qt-info@nokia.com>2011-04-27 12:05:43 +0200
committeraxis <qt-info@nokia.com>2011-04-27 12:05:43 +0200
commit38be0d13830efd2d98281c645c3a60afe05ffece (patch)
tree6ea73f3ec77f7d153333779883e8120f82820abe /src/gui/image/qmovie.cpp
Initial import from the monolithic Qt.
This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+ \class QMovie
+
+ \brief The QMovie class is a convenience class for playing movies
+ with QImageReader.
+
+ \ingroup painting
+
+ This class is used to show simple animations without sound. If you want
+ to display video and media content, use the \l{Phonon Module}{Phonon}
+ multimedia framework instead.
+
+ First, create a QMovie object by passing either the name of a file or a
+ pointer to a QIODevice containing an animated image format to QMovie's
+ constructor. You can call isValid() to check if the image data is valid,
+ before starting the movie. To start the movie, call start(). QMovie will
+ enter \l Running state, and emit started() and stateChanged(). To get the
+ current state of the movie, call state().
+
+ To display the movie in your application, you can pass your QMovie object
+ to QLabel::setMovie(). Example:
+
+ \snippet doc/src/snippets/code/src_gui_image_qmovie.cpp 0
+
+ Whenever a new frame is available in the movie, QMovie will emit
+ updated(). If the size of the frame changes, resized() is emitted. You can
+ call currentImage() or currentPixmap() to get a copy of the current
+ frame. When the movie is done, QMovie emits finished(). If any error
+ occurs during playback (i.e, the image file is corrupt), QMovie will emit
+ error().
+
+ You can control the speed of the movie playback by calling setSpeed(),
+ which takes the percentage of the original speed as an argument. Pause the
+ movie by calling setPaused(true). QMovie will then enter \l Paused state
+ and emit stateChanged(). If you call setPaused(false), QMovie will reenter
+ \l Running state and start the movie again. To stop the movie, call
+ stop().
+
+ Certain animation formats allow you to set the background color. You can
+ call setBackgroundColor() to set the color, or backgroundColor() to
+ retrieve the current background color.
+
+ currentFrameNumber() returns the sequence number of the current frame. The
+ first frame in the animation has the sequence number 0. frameCount()
+ returns the total number of frames in the animation, if the image format
+ supports this. You can call loopCount() to get the number of times the
+ movie should loop before finishing. nextFrameDelay() returns the number of
+ milliseconds the current frame should be displayed.
+
+ QMovie can be instructed to cache frames of an animation by calling
+ setCacheMode().
+
+ Call supportedFormats() for a list of formats that QMovie supports.
+
+ \sa QLabel, QImageReader, {Movie Example}
+*/
+
+/*! \enum QMovie::MovieState
+
+ This enum describes the different states of QMovie.
+
+ \value NotRunning The movie is not running. This is QMovie's initial
+ state, and the state it enters after stop() has been called or the movie
+ is finished.
+
+ \value Paused The movie is paused, and QMovie stops emitting updated() or
+ resized(). This state is entered after calling pause() or
+ setPaused(true). The current frame number it kept, and the movie will
+ continue with the next frame when unpause() or setPaused(false) is called.
+
+ \value Running The movie is running.
+*/
+
+/*! \enum QMovie::CacheMode
+
+ This enum describes the different cache modes of QMovie.
+
+ \value CacheNone No frames are cached (the default).
+
+ \value CacheAll All frames are cached.
+*/
+
+/*! \fn void QMovie::started()
+
+ This signal is emitted after QMovie::start() has been called, and QMovie
+ has entered QMovie::Running state.
+*/
+
+/*! \fn void QMovie::resized(const QSize &size)
+
+ This signal is emitted when the current frame has been resized to \a
+ size. This effect is sometimes used in animations as an alternative to
+ replacing the frame. You can call currentImage() or currentPixmap() to get a
+ copy of the updated frame.
+*/
+
+/*! \fn void QMovie::updated(const QRect &rect)
+
+ This signal is emitted when the rect \a rect in the current frame has been
+ updated. You can call currentImage() or currentPixmap() to get a copy of the
+ updated frame.
+*/
+
+/*! \fn void QMovie::frameChanged(int frameNumber)
+ \since 4.1
+
+ This signal is emitted when the frame number has changed to
+ \a frameNumber. You can call currentImage() or currentPixmap() to get a
+ copy of the frame.
+*/
+
+/*!
+ \fn void QMovie::stateChanged(QMovie::MovieState state)
+
+ This signal is emitted every time the state of the movie changes. The new
+ state is specified by \a state.
+
+ \sa QMovie::state()
+*/
+
+/*! \fn void QMovie::error(QImageReader::ImageReaderError error)
+
+ This signal is emitted by QMovie when the error \a error occurred during
+ playback. QMovie will stop the movie, and enter QMovie::NotRunning state.
+*/
+
+/*! \fn void QMovie::finished()
+
+ This signal is emitted when the movie has finished.
+
+ \sa QMovie::stop()
+*/
+
+#include "qglobal.h"
+
+#ifndef QT_NO_MOVIE
+
+#include "qmovie.h"
+#include "qimage.h"
+#include "qimagereader.h"
+#include "qpixmap.h"
+#include "qrect.h"
+#include "qdatetime.h"
+#include "qtimer.h"
+#include "qpair.h"
+#include "qmap.h"
+#include "qlist.h"
+#include "qbuffer.h"
+#include "qdir.h"
+#include "private/qobject_p.h"
+
+#define QMOVIE_INVALID_DELAY -1
+
+QT_BEGIN_NAMESPACE
+
+class QFrameInfo
+{
+public:
+ QPixmap pixmap;
+ int delay;
+ bool endMark;
+ inline QFrameInfo(bool endMark)
+ : pixmap(QPixmap()), delay(QMOVIE_INVALID_DELAY), endMark(endMark)
+ { }
+
+ inline QFrameInfo()
+ : pixmap(QPixmap()), delay(QMOVIE_INVALID_DELAY), endMark(false)
+ { }
+
+ inline QFrameInfo(const QPixmap &pixmap, int delay)
+ : pixmap(pixmap), delay(delay), endMark(false)
+ { }
+
+ inline bool isValid()
+ {
+ return endMark || !(pixmap.isNull() && (delay == QMOVIE_INVALID_DELAY));
+ }
+
+ inline bool isEndMarker()
+ { return endMark; }
+
+ static inline QFrameInfo endMarker()
+ { return QFrameInfo(true); }
+};
+
+class QMoviePrivate : public QObjectPrivate
+{
+ Q_DECLARE_PUBLIC(QMovie)
+
+public:
+ QMoviePrivate(QMovie *qq);
+ bool isDone();
+ bool next();
+ int speedAdjustedDelay(int delay) const;
+ bool isValid() const;
+ bool jumpToFrame(int frameNumber);
+ int frameCount() const;
+ bool jumpToNextFrame();
+ QFrameInfo infoForFrame(int frameNumber);
+ void reset();
+
+ inline void enterState(QMovie::MovieState newState) {
+ movieState = newState;
+ emit q_func()->stateChanged(newState);
+ }
+
+ // private slots
+ void _q_loadNextFrame();
+ void _q_loadNextFrame(bool starting);
+
+ QImageReader *reader;
+ int speed;
+ QMovie::MovieState movieState;
+ QRect frameRect;
+ QPixmap currentPixmap;
+ int currentFrameNumber;
+ int nextFrameNumber;
+ int greatestFrameNumber;
+ int nextDelay;
+ int playCounter;
+ qint64 initialDevicePos;
+ QMovie::CacheMode cacheMode;
+ bool haveReadAll;
+ bool isFirstIteration;
+ QMap<int, QFrameInfo> frameMap;
+ QString absoluteFilePath;
+
+ QTimer nextImageTimer;
+};
+
+/*! \internal
+ */
+QMoviePrivate::QMoviePrivate(QMovie *qq)
+ : reader(0), speed(100), movieState(QMovie::NotRunning),
+ currentFrameNumber(-1), nextFrameNumber(0), greatestFrameNumber(-1),
+ nextDelay(0), playCounter(-1),
+ cacheMode(QMovie::CacheNone), haveReadAll(false), isFirstIteration(true)
+{
+ q_ptr = qq;
+ nextImageTimer.setSingleShot(true);
+}
+
+/*! \internal
+ */
+void QMoviePrivate::reset()
+{
+ nextImageTimer.stop();
+ if (reader->device())
+ initialDevicePos = reader->device()->pos();
+ currentFrameNumber = -1;
+ nextFrameNumber = 0;
+ greatestFrameNumber = -1;
+ nextDelay = 0;
+ playCounter = -1;
+ haveReadAll = false;
+ isFirstIteration = true;
+ frameMap.clear();
+}
+
+/*! \internal
+ */
+bool QMoviePrivate::isDone()
+{
+ return (playCounter == 0);
+}
+
+/*!
+ \internal
+
+ Given the original \a delay, this function returns the
+ actual number of milliseconds to delay according to
+ the current speed. E.g. if the speed is 200%, the
+ result will be half of the original delay.
+*/
+int QMoviePrivate::speedAdjustedDelay(int delay) const
+{
+ return int( (qint64(delay) * qint64(100) ) / qint64(speed) );
+}
+
+/*!
+ \internal
+
+ Returns the QFrameInfo for the given \a frameNumber.
+
+ If the frame number is invalid, an invalid QFrameInfo is
+ returned.
+
+ If the end of the animation has been reached, a
+ special end marker QFrameInfo is returned.
+
+*/
+QFrameInfo QMoviePrivate::infoForFrame(int frameNumber)
+{
+ if (frameNumber < 0)
+ return QFrameInfo(); // Invalid
+
+ if (haveReadAll && (frameNumber > greatestFrameNumber)) {
+ if (frameNumber == greatestFrameNumber+1)
+ return QFrameInfo::endMarker();
+ return QFrameInfo(); // Invalid
+ }
+
+ if (cacheMode == QMovie::CacheNone) {
+ if (frameNumber != currentFrameNumber+1) {
+ // Non-sequential frame access
+ if (!reader->jumpToImage(frameNumber)) {
+ if (frameNumber == 0) {
+ // Special case: Attempt to "rewind" so we can loop
+ // ### This could be implemented as QImageReader::rewind()
+ if (reader->device()->isSequential())
+ return QFrameInfo(); // Invalid
+ QString fileName = reader->fileName();
+ QByteArray format = reader->format();
+ QIODevice *device = reader->device();
+ QColor bgColor = reader->backgroundColor();
+ QSize scaledSize = reader->scaledSize();
+ delete reader;
+ if (fileName.isEmpty())
+ reader = new QImageReader(device, format);
+ else
+ reader = new QImageReader(absoluteFilePath, format);
+ (void)reader->canRead(); // Provoke a device->open() call
+ reader->device()->seek(initialDevicePos);
+ reader->setBackgroundColor(bgColor);
+ reader->setScaledSize(scaledSize);
+ } else {
+ return QFrameInfo(); // Invalid
+ }
+ }
+ }
+ if (reader->canRead()) {
+ // reader says we can read. Attempt to actually read image
+ QImage anImage = reader->read();
+ if (anImage.isNull()) {
+ // Reading image failed.
+ return QFrameInfo(); // Invalid
+ }
+ if (frameNumber > greatestFrameNumber)
+ greatestFrameNumber = frameNumber;
+ QPixmap aPixmap = QPixmap::fromImage(anImage);
+ int aDelay = reader->nextImageDelay();
+ return QFrameInfo(aPixmap, aDelay);
+ } else if (frameNumber != 0) {
+ // We've read all frames now. Return an end marker
+ haveReadAll = true;
+ return QFrameInfo::endMarker();
+ } else {
+ // No readable frames
+ haveReadAll = true;
+ return QFrameInfo();
+ }
+ }
+
+ // CacheMode == CacheAll
+ if (frameNumber > greatestFrameNumber) {
+ // Frame hasn't been read from file yet. Try to do it
+ for (int i = greatestFrameNumber + 1; i <= frameNumber; ++i) {
+ if (reader->canRead()) {
+ // reader says we can read. Attempt to actually read image
+ QImage anImage = reader->read();
+ if (anImage.isNull()) {
+ // Reading image failed.
+ return QFrameInfo(); // Invalid
+ }
+ greatestFrameNumber = i;
+ QPixmap aPixmap = QPixmap::fromImage(anImage);
+ int aDelay = reader->nextImageDelay();
+ QFrameInfo info(aPixmap, aDelay);
+ // Cache it!
+ frameMap.insert(i, info);
+ if (i == frameNumber) {
+ return info;
+ }
+ } else {
+ // We've read all frames now. Return an end marker
+ haveReadAll = true;
+ return QFrameInfo::endMarker();
+ }
+ }
+ }
+ // Return info for requested (cached) frame
+ return frameMap.value(frameNumber);
+}
+
+/*!
+ \internal
+
+ Attempts to advance the animation to the next frame.
+ If successful, currentFrameNumber, currentPixmap and
+ nextDelay are updated accordingly, and true is returned.
+ Otherwise, false is returned.
+ When false is returned, isDone() can be called to
+ determine whether the animation ended gracefully or
+ an error occurred when reading the frame.
+*/
+bool QMoviePrivate::next()
+{
+ QTime time;
+ time.start();
+ QFrameInfo info = infoForFrame(nextFrameNumber);
+ if (!info.isValid())
+ return false;
+ if (info.isEndMarker()) {
+ // We reached the end of the animation.
+ if (isFirstIteration) {
+ if (nextFrameNumber == 0) {
+ // No frames could be read at all (error).
+ return false;
+ }
+ // End of first iteration. Initialize play counter
+ playCounter = reader->loopCount();
+ isFirstIteration = false;
+ }
+ // Loop as appropriate
+ if (playCounter != 0) {
+ if (playCounter != -1) // Infinite?
+ playCounter--; // Nope
+ nextFrameNumber = 0;
+ return next();
+ }
+ // Loop no more. Done
+ return false;
+ }
+ // Image and delay OK, update internal state
+ currentFrameNumber = nextFrameNumber++;
+ QSize scaledSize = reader->scaledSize();
+ if (scaledSize.isValid() && (scaledSize != info.pixmap.size()))
+ currentPixmap = QPixmap::fromImage( info.pixmap.toImage().scaled(scaledSize) );
+ else
+ currentPixmap = info.pixmap;
+ nextDelay = speedAdjustedDelay(info.delay);
+ // Adjust delay according to the time it took to read the frame
+ int processingTime = time.elapsed();
+ if (processingTime > nextDelay)
+ nextDelay = 0;
+ else
+ nextDelay = nextDelay - processingTime;
+ return true;
+}
+
+/*! \internal
+ */
+void QMoviePrivate::_q_loadNextFrame()
+{
+ _q_loadNextFrame(false);
+}
+
+void QMoviePrivate::_q_loadNextFrame(bool starting)
+{
+ Q_Q(QMovie);
+ if (next()) {
+ if (starting && movieState == QMovie::NotRunning) {
+ enterState(QMovie::Running);
+ emit q->started();
+ }
+
+ if (frameRect.size() != currentPixmap.rect().size()) {
+ frameRect = currentPixmap.rect();
+ emit q->resized(frameRect.size());
+ }
+
+ emit q->updated(frameRect);
+ emit q->frameChanged(currentFrameNumber);
+
+ if (movieState == QMovie::Running)
+ nextImageTimer.start(nextDelay);
+ } else {
+ // Could not read another frame
+ if (!isDone()) {
+ emit q->error(reader->error());
+ }
+
+ // Graceful finish
+ if (movieState != QMovie::Paused) {
+ nextFrameNumber = 0;
+ isFirstIteration = true;
+ playCounter = -1;
+ enterState(QMovie::NotRunning);
+ emit q->finished();
+ }
+ }
+}
+
+/*!
+ \internal
+*/
+bool QMoviePrivate::isValid() const
+{
+ return (greatestFrameNumber >= 0) // have we seen valid data
+ || reader->canRead(); // or does the reader see valid data
+}
+
+/*!
+ \internal
+*/
+bool QMoviePrivate::jumpToFrame(int frameNumber)
+{
+ if (frameNumber < 0)
+ return false;
+ if (currentFrameNumber == frameNumber)
+ return true;
+ nextFrameNumber = frameNumber;
+ if (movieState == QMovie::Running)
+ nextImageTimer.stop();
+ _q_loadNextFrame();
+ return (nextFrameNumber == currentFrameNumber+1);
+}
+
+/*!
+ \internal
+*/
+int QMoviePrivate::frameCount() const
+{
+ int result;
+ if ((result = reader->imageCount()) != 0)
+ return result;
+ if (haveReadAll)
+ return greatestFrameNumber+1;
+ return 0; // Don't know
+}
+
+/*!
+ \internal
+*/
+bool QMoviePrivate::jumpToNextFrame()
+{
+ return jumpToFrame(currentFrameNumber+1);
+}
+
+/*!
+ Constructs a QMovie object, passing the \a parent object to QObject's
+ constructor.
+
+ \sa setFileName(), setDevice(), setFormat()
+ */
+QMovie::QMovie(QObject *parent)
+ : QObject(*new QMoviePrivate(this), parent)
+{
+ Q_D(QMovie);
+ d->reader = new QImageReader;
+ connect(&d->nextImageTimer, SIGNAL(timeout()), this, SLOT(_q_loadNextFrame()));
+}
+
+/*!
+ Constructs a QMovie object. QMovie will use read image data from \a
+ device, which it assumes is open and readable. If \a format is not empty,
+ QMovie will use the image format \a format for decoding the image
+ data. Otherwise, QMovie will attempt to guess the format.
+
+ The \a parent object is passed to QObject's constructor.
+ */
+QMovie::QMovie(QIODevice *device, const QByteArray &format, QObject *parent)
+ : QObject(*new QMoviePrivate(this), parent)
+{
+ Q_D(QMovie);
+ d->reader = new QImageReader(device, format);
+ d->initialDevicePos = device->pos();
+ connect(&d->nextImageTimer, SIGNAL(timeout()), this, SLOT(_q_loadNextFrame()));
+}
+
+/*!
+ Constructs a QMovie object. QMovie will use read image data from \a
+ fileName. If \a format is not empty, QMovie will use the image format \a
+ format for decoding the image data. Otherwise, QMovie will attempt to
+ guess the format.
+
+ The \a parent object is passed to QObject's constructor.
+ */
+QMovie::QMovie(const QString &fileName, const QByteArray &format, QObject *parent)
+ : QObject(*new QMoviePrivate(this), parent)
+{
+ Q_D(QMovie);
+ d->absoluteFilePath = QDir(fileName).absolutePath();
+ d->reader = new QImageReader(fileName, format);
+ if (d->reader->device())
+ d->initialDevicePos = d->reader->device()->pos();
+ connect(&d->nextImageTimer, SIGNAL(timeout()), this, SLOT(_q_loadNextFrame()));
+}
+
+/*!
+ Destructs the QMovie object.
+*/
+QMovie::~QMovie()
+{
+ Q_D(QMovie);
+ delete d->reader;
+}
+
+/*!
+ Sets the current device to \a device. QMovie will read image data from
+ this device when the movie is running.
+
+ \sa device(), setFormat()
+*/
+void QMovie::setDevice(QIODevice *device)
+{
+ Q_D(QMovie);
+ d->reader->setDevice(device);
+ d->reset();
+}
+
+/*!
+ Returns the device QMovie reads image data from. If no device has
+ currently been assigned, 0 is returned.
+
+ \sa setDevice(), fileName()
+*/
+QIODevice *QMovie::device() const
+{
+ Q_D(const QMovie);
+ return d->reader->device();
+}
+
+/*!
+ Sets the name of the file that QMovie reads image data from, to \a
+ fileName.
+
+ \sa fileName(), setDevice(), setFormat()
+*/
+void QMovie::setFileName(const QString &fileName)
+{
+ Q_D(QMovie);
+ d->absoluteFilePath = QDir(fileName).absolutePath();
+ d->reader->setFileName(fileName);
+ d->reset();
+}
+
+/*!
+ Returns the name of the file that QMovie reads image data from. If no file
+ name has been assigned, or if the assigned device is not a file, an empty
+ QString is returned.
+
+ \sa setFileName(), device()
+*/
+QString QMovie::fileName() const
+{
+ Q_D(const QMovie);
+ return d->reader->fileName();
+}
+
+/*!
+ Sets the format that QMovie will use when decoding image data, to \a
+ format. By default, QMovie will attempt to guess the format of the image
+ data.
+
+ You can call supportedFormats() for the full list of formats
+ QMovie supports.
+
+ \sa QImageReader::supportedImageFormats()
+*/
+void QMovie::setFormat(const QByteArray &format)
+{
+ Q_D(QMovie);
+ d->reader->setFormat(format);
+}
+
+/*!
+ Returns the format that QMovie uses when decoding image data. If no format
+ has been assigned, an empty QByteArray() is returned.
+
+ \sa setFormat()
+*/
+QByteArray QMovie::format() const
+{
+ Q_D(const QMovie);
+ return d->reader->format();
+}
+
+/*!
+ For image formats that support it, this function sets the background color
+ to \a color.
+
+ \sa backgroundColor()
+*/
+void QMovie::setBackgroundColor(const QColor &color)
+{
+ Q_D(QMovie);
+ d->reader->setBackgroundColor(color);
+}
+
+/*!
+ Returns the background color of the movie. If no background color has been
+ assigned, an invalid QColor is returned.
+
+ \sa setBackgroundColor()
+*/
+QColor QMovie::backgroundColor() const
+{
+ Q_D(const QMovie);
+ return d->reader->backgroundColor();
+}
+
+/*!
+ Returns the current state of QMovie.
+
+ \sa MovieState, stateChanged()
+*/
+QMovie::MovieState QMovie::state() const
+{
+ Q_D(const QMovie);
+ return d->movieState;
+}
+
+/*!
+ Returns the rect of the last frame. If no frame has yet been updated, an
+ invalid QRect is returned.
+
+ \sa currentImage(), currentPixmap()
+*/
+QRect QMovie::frameRect() const
+{
+ Q_D(const QMovie);
+ return d->frameRect;
+}
+
+/*! \fn QImage QMovie::framePixmap() const
+
+ Use currentPixmap() instead.
+*/
+
+/*! \fn void QMovie::pause()
+
+ Use setPaused(true) instead.
+*/
+
+/*! \fn void QMovie::unpause()
+
+ Use setPaused(false) instead.
+*/
+
+/*!
+ Returns the current frame as a QPixmap.
+
+ \sa currentImage(), updated()
+*/
+QPixmap QMovie::currentPixmap() const
+{
+ Q_D(const QMovie);
+ return d->currentPixmap;
+}
+
+/*! \fn QImage QMovie::frameImage() const
+
+ Use currentImage() instead.
+*/
+
+/*!
+ Returns the current frame as a QImage.
+
+ \sa currentPixmap(), updated()
+*/
+QImage QMovie::currentImage() const
+{
+ Q_D(const QMovie);
+ return d->currentPixmap.toImage();
+}
+
+/*!
+ Returns true if the movie is valid (e.g., the image data is readable and
+ the image format is supported); otherwise returns false.
+*/
+bool QMovie::isValid() const
+{
+ Q_D(const QMovie);
+ return d->isValid();
+}
+
+/*! \fn bool QMovie::running() const
+
+ Use state() instead.
+*/
+
+/*! \fn bool QMovie::isNull() const
+
+ Use isValid() instead.
+*/
+
+/*! \fn int QMovie::frameNumber() const
+
+ Use currentFrameNumber() instead.
+*/
+
+/*! \fn bool QMovie::paused() const
+
+ Use state() instead.
+*/
+
+/*! \fn bool QMovie::finished() const
+
+ Use state() instead.
+*/
+
+/*! \fn void QMovie::restart()
+
+ Use stop() and start() instead.
+*/
+
+/*!
+ \fn void QMovie::step()
+
+ Use jumpToNextFrame() instead.
+*/
+
+/*!
+ Returns the number of frames in the movie.
+
+ Certain animation formats do not support this feature, in which
+ case 0 is returned.
+*/
+int QMovie::frameCount() const
+{
+ Q_D(const QMovie);
+ return d->frameCount();
+}
+
+/*!
+ Returns the number of milliseconds QMovie will wait before updating the
+ next frame in the animation.
+*/
+int QMovie::nextFrameDelay() const
+{
+ Q_D(const QMovie);
+ return d->nextDelay;
+}
+
+/*!
+ Returns the sequence number of the current frame. The number of the first
+ frame in the movie is 0.
+*/
+int QMovie::currentFrameNumber() const
+{
+ Q_D(const QMovie);
+ return d->currentFrameNumber;
+}
+
+/*!
+ Jumps to the next frame. Returns true on success; otherwise returns false.
+*/
+bool QMovie::jumpToNextFrame()
+{
+ Q_D(QMovie);
+ return d->jumpToNextFrame();
+}
+
+/*!
+ Jumps to frame number \a frameNumber. Returns true on success; otherwise
+ returns false.
+*/
+bool QMovie::jumpToFrame(int frameNumber)
+{
+ Q_D(QMovie);
+ return d->jumpToFrame(frameNumber);
+}
+
+/*!
+ Returns the number of times the movie will loop before it finishes.
+ If the movie will only play once (no looping), loopCount returns 0.
+ If the movie loops forever, loopCount returns -1.
+
+ Note that, if the image data comes from a sequential device (e.g. a
+ socket), QMovie can only loop the movie if the cacheMode is set to
+ QMovie::CacheAll.
+*/
+int QMovie::loopCount() const
+{
+ Q_D(const QMovie);
+ return d->reader->loopCount();
+}
+
+/*!
+ If \a paused is true, QMovie will enter \l Paused state and emit
+ stateChanged(Paused); otherwise it will enter \l Running state and emit
+ stateChanged(Running).
+
+ \sa state()
+*/
+void QMovie::setPaused(bool paused)
+{
+ Q_D(QMovie);
+ if (paused) {
+ if (d->movieState == NotRunning)
+ return;
+ d->enterState(Paused);
+ d->nextImageTimer.stop();
+ } else {
+ if (d->movieState == Running)
+ return;
+ d->enterState(Running);
+ d->nextImageTimer.start(nextFrameDelay());
+ }
+}
+
+/*!
+ \property QMovie::speed
+ \brief the movie's speed
+
+ The speed is measured in percentage of the original movie speed.
+ The default speed is 100%.
+ Example:
+
+ \snippet doc/src/snippets/code/src_gui_image_qmovie.cpp 1
+*/
+void QMovie::setSpeed(int percentSpeed)
+{
+ Q_D(QMovie);
+ d->speed = percentSpeed;
+}
+
+int QMovie::speed() const
+{
+ Q_D(const QMovie);
+ return d->speed;
+}
+
+/*!
+ Starts the movie. QMovie will enter \l Running state, and start emitting
+ updated() and resized() as the movie progresses.
+
+ If QMovie is in the \l Paused state, this function is equivalent
+ to calling setPaused(false). If QMovie is already in the \l
+ Running state, this function does nothing.
+
+ \sa stop(), setPaused()
+*/
+void QMovie::start()
+{
+ Q_D(QMovie);
+ if (d->movieState == NotRunning) {
+ d->_q_loadNextFrame(true);
+ } else if (d->movieState == Paused) {
+ setPaused(false);
+ }
+}
+
+/*!
+ Stops the movie. QMovie enters \l NotRunning state, and stops emitting
+ updated() and resized(). If start() is called again, the movie will
+ restart from the beginning.
+
+ If QMovie is already in the \l NotRunning state, this function
+ does nothing.
+
+ \sa start(), setPaused()
+*/
+void QMovie::stop()
+{
+ Q_D(QMovie);
+ if (d->movieState == NotRunning)
+ return;
+ d->enterState(NotRunning);
+ d->nextImageTimer.stop();
+ d->nextFrameNumber = 0;
+}
+
+/*!
+ \since 4.1
+
+ Returns the scaled size of frames.
+
+ \sa QImageReader::scaledSize()
+*/
+QSize QMovie::scaledSize()
+{
+ Q_D(QMovie);
+ return d->reader->scaledSize();
+}
+
+/*!
+ \since 4.1
+
+ Sets the scaled frame size to \a size.
+
+ \sa QImageReader::setScaledSize()
+*/
+void QMovie::setScaledSize(const QSize &size)
+{
+ Q_D(QMovie);
+ d->reader->setScaledSize(size);
+}
+
+/*!
+ \since 4.1
+
+ Returns the list of image formats supported by QMovie.
+
+ \sa QImageReader::supportedImageFormats()
+*/
+QList<QByteArray> QMovie::supportedFormats()
+{
+ QList<QByteArray> list = QImageReader::supportedImageFormats();
+ QMutableListIterator<QByteArray> it(list);
+ QBuffer buffer;
+ buffer.open(QIODevice::ReadOnly);
+ while (it.hasNext()) {
+ QImageReader reader(&buffer, it.next());
+ if (!reader.supportsAnimation())
+ it.remove();
+ }
+ return list;
+}
+
+/*!
+ \property QMovie::cacheMode
+ \brief the movie's cache mode
+
+ Caching frames can be useful when the underlying animation format handler
+ that QMovie relies on to decode the animation data does not support
+ jumping to particular frames in the animation, or even "rewinding" the
+ animation to the beginning (for looping). Furthermore, if the image data
+ comes from a sequential device, it is not possible for the underlying
+ animation handler to seek back to frames whose data has already been read
+ (making looping altogether impossible).
+
+ To aid in such situations, a QMovie object can be instructed to cache the
+ frames, at the added memory cost of keeping the frames in memory for the
+ lifetime of the object.
+
+ By default, this property is set to \l CacheNone.
+
+ \sa QMovie::CacheMode
+*/
+
+QMovie::CacheMode QMovie::cacheMode() const
+{
+ Q_D(const QMovie);
+ return d->cacheMode;
+}
+
+void QMovie::setCacheMode(CacheMode cacheMode)
+{
+ Q_D(QMovie);
+ d->cacheMode = cacheMode;
+}
+
+/*!
+ \internal
+*/
+QMovie::CacheMode QMovie::cacheMode()
+{
+ Q_D(QMovie);
+ return d->cacheMode;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qmovie.cpp"
+
+#endif // QT_NO_MOVIE