C++/Qt/QMovie — различия между версиями
Admin (обсуждение | вклад) м (1 версия: Импорт контента...) |
Admin (обсуждение | вклад) м (1 версия: Импорт контента...) |
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Текущая версия на 10:25, 25 мая 2010
mng file player
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** GNU General Public License Usage
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** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
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****************************************************************************/
#ifndef MOVIEPLAYER_H
#define MOVIEPLAYER_H
#include <QWidget>
QT_BEGIN_NAMESPACE
class QCheckBox;
class QGridLayout;
class QHBoxLayout;
class QLabel;
class QMovie;
class QSlider;
class QSpinBox;
class QToolButton;
class QVBoxLayout;
QT_END_NAMESPACE
class MoviePlayer : public QWidget
{
Q_OBJECT
public:
MoviePlayer(QWidget *parent = 0);
void openFile(const QString &fileName);
private slots:
void open();
void goToFrame(int frame);
void fitToWindow();
void updateButtons();
void updateFrameSlider();
private:
void createControls();
void createButtons();
QString currentMovieDirectory;
QLabel *movieLabel;
QMovie *movie;
QToolButton *openButton;
QToolButton *playButton;
QToolButton *pauseButton;
QToolButton *stopButton;
QToolButton *quitButton;
QCheckBox *fitCheckBox;
QSlider *frameSlider;
QSpinBox *speedSpinBox;
QLabel *frameLabel;
QLabel *speedLabel;
QGridLayout *controlsLayout;
QHBoxLayout *buttonsLayout;
QVBoxLayout *mainLayout;
};
#endif
#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(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();
}
#include <QApplication>
#include "movieplayer.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MoviePlayer player;
player.show();
return app.exec();
}