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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(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();

}