interface_widgets.cpp

/*****************************************************************************
 * interface_widgets.cpp : Custom widgets for the main interface
 ****************************************************************************
 * Copyright ( C ) 2006 the VideoLAN team
 * $Id$
 *
 * Authors: Clément Stenac <zorglub@videolan.org>
 *          Jean-Baptiste Kempf <jb@videolan.org>
 *          Rafaël Carré <funman@videolanorg>
 *          Ilkka Ollakka <ileoo@videolan.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * ( at your option ) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <vlc_vout.h>

#include "dialogs_provider.hpp"
#include "components/interface_widgets.hpp"
#include "main_interface.hpp"
#include "input_manager.hpp"
#include "menus.hpp"
#include "util/input_slider.hpp"
#include "util/customwidgets.hpp"

#include <QLabel>
#include <QSpacerItem>
#include <QCursor>
#include <QPushButton>
#include <QToolButton>
#include <QHBoxLayout>
#include <QMenu>
#include <QPalette>
#include <QResizeEvent>
#include <QDate>

#ifdef Q_WS_X11
# include <X11/Xlib.h>
# include <qx11info_x11.h>
#endif

#include <math.h>

#define I_PLAY_TOOLTIP "Play\nIf the playlist is empty, open a media"

/**********************************************************************
 * Video Widget. A simple frame on which video is drawn
 * This class handles resize issues
 **********************************************************************/

VideoWidget::VideoWidget( intf_thread_t *_p_i ) : QFrame( NULL ), p_intf( _p_i )
{
    /* Init */
    i_vout = 0;
    hide(); setMinimumSize( 16, 16 );
    videoSize.rwidth() = -1;
    videoSize.rheight() = -1;
    setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );

    /* Black background is more coherent for a Video Widget IMVHO */
    QPalette plt =  palette();
    plt.setColor( QPalette::Active, QPalette::Window , Qt::black );
    plt.setColor( QPalette::Inactive, QPalette::Window , Qt::black );
    setPalette( plt );
    setAttribute( Qt::WA_PaintOnScreen, true );

    /* The core can ask through a callback to show the video. */
#if HAS_QT43
    connect( this, SIGNAL(askVideoWidgetToShow( unsigned int, unsigned int)),
             this, SLOT(SetSizing(unsigned int, unsigned int )),
             Qt::BlockingQueuedConnection );
#else
#error This is broken. Fix it with a QEventLoop with a processEvents () 
    connect( this, SIGNAL(askVideoWidgetToShow( unsigned int, unsigned int)),
             this, SLOT(SetSizing(unsigned int, unsigned int )) );
#endif
}

void VideoWidget::paintEvent(QPaintEvent *ev)
{
    QFrame::paintEvent(ev);
#ifdef Q_WS_X11
    XFlush( QX11Info::display() );
#endif
}

VideoWidget::~VideoWidget()
{
    vout_thread_t *p_vout = i_vout
        ? (vout_thread_t *)vlc_object_get( i_vout ) : NULL;

    if( p_vout )
    {
        if( !p_intf->psz_switch_intf )
        {
            if( vout_Control( p_vout, VOUT_CLOSE ) != VLC_SUCCESS )
                vout_Control( p_vout, VOUT_REPARENT );
        }
        else
        {
            if( vout_Control( p_vout, VOUT_REPARENT ) != VLC_SUCCESS )
                vout_Control( p_vout, VOUT_CLOSE );
        }
        vlc_object_release( p_vout );
    }
}

/**
 * Request the video to avoid the conflicts
 **/
void *VideoWidget::request( vout_thread_t *p_nvout, int *pi_x, int *pi_y,
                            unsigned int *pi_width, unsigned int *pi_height )
{
    msg_Dbg( p_intf, "Video was requested %i, %i", *pi_x, *pi_y );
    emit askVideoWidgetToShow( *pi_width, *pi_height );
    if( i_vout )
    {
        msg_Dbg( p_intf, "embedded video already in use" );
        return NULL;
    }
    i_vout = p_nvout->i_object_id;
    msg_Dbg( p_intf, "embedded video ready (handle %p)", winId() );
    return ( void* )winId();
}

/* Set the Widget to the correct Size */
/* Function has to be called by the parent
   Parent has to care about resizing himself*/
void VideoWidget::SetSizing( unsigned int w, unsigned int h )
{
    msg_Dbg( p_intf, "Video is resizing to: %i %i", w, h );
    videoSize.rwidth() = w;
    videoSize.rheight() = h;
    if( isHidden() ) show();
    updateGeometry(); // Needed for deinterlace
}

void VideoWidget::release( void *p_win )
{
    msg_Dbg( p_intf, "Video is not needed anymore" );
    i_vout = 0;
    videoSize.rwidth() = 0;
    videoSize.rheight() = 0;
    hide();
    updateGeometry(); // Needed for deinterlace
}

QSize VideoWidget::sizeHint() const
{
    return videoSize;
}

/**********************************************************************
 * Background Widget. Show a simple image background. Currently,
 * it's album art if present or cone.
 **********************************************************************/
#define ICON_SIZE 128
#define MAX_BG_SIZE 400
#define MIN_BG_SIZE 64

BackgroundWidget::BackgroundWidget( intf_thread_t *_p_i )
                 :QWidget( NULL ), p_intf( _p_i )
{
    /* We should use that one to take the more size it can */
    setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding);

    /* A dark background */
    setAutoFillBackground( true );
    plt =  palette();
    plt.setColor( QPalette::Active, QPalette::Window , Qt::black );
    plt.setColor( QPalette::Inactive, QPalette::Window , Qt::black );
    setPalette( plt );

    /* A cone in the middle */
    label = new QLabel;
    label->setMargin( 5 );
    label->setMaximumHeight( MAX_BG_SIZE );
    label->setMaximumWidth( MAX_BG_SIZE );
    label->setMinimumHeight( MIN_BG_SIZE );
    label->setMinimumWidth( MIN_BG_SIZE );
    if( QDate::currentDate().dayOfYear() >= 354 )
        label->setPixmap( QPixmap( ":/vlc128-christmas.png" ) );
    else
        label->setPixmap( QPixmap( ":/vlc128.png" ) );

    QGridLayout *backgroundLayout = new QGridLayout( this );
    backgroundLayout->addWidget( label, 0, 1 );
    backgroundLayout->setColumnStretch( 0, 1 );
    backgroundLayout->setColumnStretch( 2, 1 );

    CONNECT( THEMIM->getIM(), artChanged( QString ), this, updateArt( QString ) );
}

BackgroundWidget::~BackgroundWidget()
{}

void BackgroundWidget::resizeEvent( QResizeEvent * event )
{
    if( event->size().height() <= MIN_BG_SIZE )
        label->hide();
    else
        label->show();
}

void BackgroundWidget::updateArt( QString url )
{
    if( url.isEmpty() )
    {
        if( QDate::currentDate().dayOfYear() >= 354 )
            label->setPixmap( QPixmap( ":/vlc128-christmas.png" ) );
        else
            label->setPixmap( QPixmap( ":/vlc128.png" ) );
        return;
    }
    else
    {
        label->setPixmap( QPixmap( url ) );
    }
}

void BackgroundWidget::contextMenuEvent( QContextMenuEvent *event )
{
    QVLCMenu::PopupMenu( p_intf, true );
}

/**********************************************************************
 * Visualization selector panel
 **********************************************************************/
VisualSelector::VisualSelector( intf_thread_t *_p_i ) :
                                QFrame( NULL ), p_intf( _p_i )
{
    QHBoxLayout *layout = new QHBoxLayout( this );
    layout->setMargin( 0 );
    QPushButton *prevButton = new QPushButton( "Prev" );
    QPushButton *nextButton = new QPushButton( "Next" );
    layout->addWidget( prevButton );
    layout->addWidget( nextButton );

    layout->addStretch( 10 );
    layout->addWidget( new QLabel( qtr( "Current visualization" ) ) );

    current = new QLabel( qtr( "None" ) );
    layout->addWidget( current );

    BUTTONACT( prevButton, prev() );
    BUTTONACT( nextButton, next() );

    setLayout( layout );
    setMaximumHeight( 35 );
}

VisualSelector::~VisualSelector()
{}

void VisualSelector::prev()
{
    char *psz_new = aout_VisualPrev( p_intf );
    if( psz_new )
    {
        current->setText( qfu( psz_new ) );
        free( psz_new );
    }
}

void VisualSelector::next()
{
    char *psz_new = aout_VisualNext( p_intf );
    if( psz_new )
    {
        current->setText( qfu( psz_new ) );
        free( psz_new );
    }
}

/**********************************************************************
 * TEH controls
 **********************************************************************/

#define setupSmallButton( aButton ){  \
    aButton->setMaximumSize( QSize( 26, 26 ) ); \
    aButton->setMinimumSize( QSize( 26, 26 ) ); \
    aButton->setIconSize( QSize( 20, 20 ) ); }

AdvControlsWidget::AdvControlsWidget( intf_thread_t *_p_i ) :
                                           QFrame( NULL ), p_intf( _p_i )
{
    QHBoxLayout *advLayout = new QHBoxLayout( this );
    advLayout->setMargin( 0 );
    advLayout->setSpacing( 0 );
    advLayout->setAlignment( Qt::AlignBottom );

    /* A to B Button */
    ABButton = new QPushButton;
    setupSmallButton( ABButton );
    advLayout->addWidget( ABButton );
    BUTTON_SET_ACT_I( ABButton, "", atob_nob,
      qtr( "Loop from point A to point B continuously.\nClick to set point A" ),
      fromAtoB() );
    timeA = timeB = 0;
    CONNECT( THEMIM->getIM(), positionUpdated( float, int, int ),
             this, AtoBLoop( float, int, int ) );
#if 0
    frameButton = new QPushButton( "Fr" );
    frameButton->setMaximumSize( QSize( 26, 26 ) );
    frameButton->setIconSize( QSize( 20, 20 ) );
    advLayout->addWidget( frameButton );
    BUTTON_SET_ACT( frameButton, "Fr", qtr( "Frame by frame" ), frame() );
#endif

    recordButton = new QPushButton;
    setupSmallButton( recordButton );
    advLayout->addWidget( recordButton );
    BUTTON_SET_ACT_I( recordButton, "", record,
            qtr( "Record" ), record() );

    /* Snapshot Button */
    snapshotButton = new QPushButton;
    setupSmallButton( snapshotButton );
    advLayout->addWidget( snapshotButton );
    BUTTON_SET_ACT_I( snapshotButton, "", snapshot,
            qtr( "Take a snapshot" ), snapshot() );
}

AdvControlsWidget::~AdvControlsWidget()
{}

void AdvControlsWidget::enableInput( bool enable )
{
    ABButton->setEnabled( enable );
    recordButton->setEnabled( enable );
}

void AdvControlsWidget::enableVideo( bool enable )
{
    snapshotButton->setEnabled( enable );
#if 0
    frameButton->setEnabled( enable );
#endif
}

void AdvControlsWidget::snapshot()
{
    vout_thread_t *p_vout =
        (vout_thread_t *)vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_ANYWHERE );
    if( p_vout ) vout_Control( p_vout, VOUT_SNAPSHOT );
}

/* Function called when the button is clicked() */
void AdvControlsWidget::fromAtoB()
{
    if( !timeA )
    {
        timeA = var_GetTime( THEMIM->getInput(), "time"  );
        ABButton->setToolTip( "Click to set point B" );
        ABButton->setIcon( QIcon( ":/atob_noa" ) );
        return;
    }
    if( !timeB )
    {
        timeB = var_GetTime( THEMIM->getInput(), "time"  );
        var_SetTime( THEMIM->getInput(), "time" , timeA );
        ABButton->setIcon( QIcon( ":/atob" ) );
        ABButton->setToolTip( "Stop the A to B loop" );
        return;
    }
    timeA = 0;
    timeB = 0;
    ABButton->setToolTip( qtr( "Loop from point A to point B continuously\nClick to set point A" ) );
    ABButton->setIcon( QIcon( ":/atob_nob" ) );
}

/* Function called regularly when in an AtoB loop */
void AdvControlsWidget::AtoBLoop( float f_pos, int i_time, int i_length )
{
    if( timeB )
    {
        if( i_time >= (int)(timeB/1000000) )
            var_SetTime( THEMIM->getInput(), "time" , timeA );
    }
}

/* FIXME Record function */
void AdvControlsWidget::record(){}

#if 0
//FIXME Frame by frame function
void AdvControlsWidget::frame(){}
#endif

/*****************************
 * DA Control Widget !
 *****************************/
ControlsWidget::ControlsWidget( intf_thread_t *_p_i,
                                MainInterface *_p_mi,
                                bool b_advControls,
                                bool b_shiny,
                                bool b_fsCreation) :
                                QFrame( _p_mi ), p_intf( _p_i )
{
    setSizePolicy( QSizePolicy::Preferred , QSizePolicy::Maximum );

    /** The main Slider **/
    slider = new InputSlider( Qt::Horizontal, NULL );
    /* Update the position when the IM has changed */
    CONNECT( THEMIM->getIM(), positionUpdated( float, int, int ),
             slider, setPosition( float, int, int ) );
    /* And update the IM, when the position has changed */
    CONNECT( slider, sliderDragged( float ),
             THEMIM->getIM(), sliderUpdate( float ) );

    /** Slower and faster Buttons **/
    slowerButton = new QToolButton;
    slowerButton->setAutoRaise( true );
    slowerButton->setMaximumSize( QSize( 26, 20 ) );

    BUTTON_SET_ACT( slowerButton, "-", qtr( "Slower" ), slower() );

    fasterButton = new QToolButton;
    fasterButton->setAutoRaise( true );
    fasterButton->setMaximumSize( QSize( 26, 20 ) );

    BUTTON_SET_ACT( fasterButton, "+", qtr( "Faster" ), faster() );

    /* advanced Controls handling */
    b_advancedVisible = b_advControls;

    advControls = new AdvControlsWidget( p_intf );
    if( !b_advancedVisible ) advControls->hide();

    /** Disc and Menus handling */
    discFrame = new QWidget( this );

    QHBoxLayout *discLayout = new QHBoxLayout( discFrame );
    discLayout->setSpacing( 0 );
    discLayout->setMargin( 0 );

    prevSectionButton = new QPushButton( discFrame );
    setupSmallButton( prevSectionButton );
    discLayout->addWidget( prevSectionButton );

    menuButton = new QPushButton( discFrame );
    setupSmallButton( menuButton );
    discLayout->addWidget( menuButton );

    nextSectionButton = new QPushButton( discFrame );
    setupSmallButton( nextSectionButton );
    discLayout->addWidget( nextSectionButton );

    BUTTON_SET_IMG( prevSectionButton, "", dvd_prev, "" );
    BUTTON_SET_IMG( nextSectionButton, "", dvd_next, "" );
    BUTTON_SET_IMG( menuButton, "", dvd_menu, qtr( "Menu" ) );

    discFrame->hide();

    /* Change the navigation button display when the IM navigation changes */
    CONNECT( THEMIM->getIM(), navigationChanged( int ),
             this, setNavigation( int ) );
    /* Changes the IM navigation when triggered on the nav buttons */
    CONNECT( prevSectionButton, clicked(), THEMIM->getIM(),
             sectionPrev() );
    CONNECT( nextSectionButton, clicked(), THEMIM->getIM(),
             sectionNext() );
    CONNECT( menuButton, clicked(), THEMIM->getIM(),
             sectionMenu() );

    /**
     * Telextext QFrame
     * TODO: Merge with upper menu in a StackLayout
     **/
    telexFrame = new QWidget( this );
    QHBoxLayout *telexLayout = new QHBoxLayout( telexFrame );
    telexLayout->setSpacing( 0 );
    telexLayout->setMargin( 0 );

    telexOn = new QPushButton;
    setupSmallButton( telexOn );
    telexLayout->addWidget( telexOn );

    telexTransparent = new QPushButton;
    setupSmallButton( telexTransparent );
    telexLayout->addWidget( telexTransparent );
    b_telexTransparent = false;

    telexPage = new QSpinBox;
    telexPage->setRange( 0, 999 );
    telexPage->setValue( 100 );
    telexPage->setAccelerated( true );
    telexPage->setWrapping( true );
    telexPage->setAlignment( Qt::AlignRight );
    telexPage->setSizePolicy( QSizePolicy::Preferred, QSizePolicy::Minimum );
    telexLayout->addWidget( telexPage );

    telexFrame->hide(); /* default hidden */

    CONNECT( telexPage, valueChanged( int ), THEMIM->getIM(),
             telexGotoPage( int ) );
    CONNECT( THEMIM->getIM(), setNewTelexPage( int ),
              telexPage, setValue( int ) );

    BUTTON_SET_IMG( telexOn, "", tv, qtr( "Teletext on" ) );

    CONNECT( telexOn, clicked(), THEMIM->getIM(),
             telexToggleButtons() );
    CONNECT( telexOn, clicked( bool ), THEMIM->getIM(),
             telexToggle( bool ) );
    CONNECT( THEMIM->getIM(), toggleTelexButtons(),
              this, toggleTeletext() );
    b_telexEnabled = false;
    telexTransparent->setEnabled( false );
    telexPage->setEnabled( false );

    BUTTON_SET_IMG( telexTransparent, "", tvtelx, qtr( "Teletext" ) );
    CONNECT( telexTransparent, clicked( bool ),
             THEMIM->getIM(), telexSetTransparency() );
    CONNECT( THEMIM->getIM(), toggleTelexTransparency(),
              this, toggleTeletextTransparency() );
    CONNECT( THEMIM->getIM(), teletextEnabled( bool ),
             this, enableTeletext( bool ) );

    /** Play Buttons **/
    QSizePolicy sizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed );
    sizePolicy.setHorizontalStretch( 0 );
    sizePolicy.setVerticalStretch( 0 );

    /* Play */
    playButton = new QPushButton;
    playButton->setSizePolicy( sizePolicy );
    playButton->setMaximumSize( QSize( 36, 36 ) );
    playButton->setMinimumSize( QSize( 36, 36 ) );
    playButton->setIconSize( QSize( 30, 30 ) );


    /** Prev + Stop + Next Block **/
    controlButLayout = new QHBoxLayout;
    controlButLayout->setSpacing( 0 ); /* Don't remove that, will be useful */

    /* Prev */
    QPushButton *prevButton = new QPushButton;
    prevButton->setSizePolicy( sizePolicy );
    setupSmallButton( prevButton );

    controlButLayout->addWidget( prevButton );

    /* Stop */
    QPushButton *stopButton = new QPushButton;
    stopButton->setSizePolicy( sizePolicy );
    setupSmallButton( stopButton );

    controlButLayout->addWidget( stopButton );

    /* next */
    QPushButton *nextButton = new QPushButton;
    nextButton->setSizePolicy( sizePolicy );
    setupSmallButton( nextButton );

    controlButLayout->addWidget( nextButton );

    /* Add this block to the main layout */

    BUTTON_SET_ACT_I( playButton, "", play_b, qtr( I_PLAY_TOOLTIP ), play() );
    BUTTON_SET_ACT_I( prevButton, "" , previous_b,
                      qtr( "Previous media in the playlist" ), prev() );
    BUTTON_SET_ACT_I( nextButton, "", next_b,
                      qtr( "Next media in the playlist" ), next() );
    BUTTON_SET_ACT_I( stopButton, "", stop_b, qtr( "Stop playback" ), stop() );

    /*
     * Other first Line buttons
     */
    /** Fullscreen/Visualisation **/
    fullscreenButton = new QPushButton;
    BUTTON_SET_ACT_I( fullscreenButton, "", fullscreen,
            qtr( "Toggle the video in fullscreen" ), fullscreen() );
    setupSmallButton( fullscreenButton );

    if( !b_fsCreation )
    {
        /** Playlist Button **/
        playlistButton = new QPushButton;
        setupSmallButton( playlistButton );
        BUTTON_SET_IMG( playlistButton, "" , playlist, qtr( "Show playlist" ) );
        CONNECT( playlistButton, clicked(), _p_mi, togglePlaylist() );

        /** extended Settings **/
        extSettingsButton = new QPushButton;
        BUTTON_SET_ACT_I( extSettingsButton, "", extended,
                qtr( "Show extended settings" ), extSettings() );
        setupSmallButton( extSettingsButton );
    }

    /* Volume */
    hVolLabel = new VolumeClickHandler( p_intf, this );

    volMuteLabel = new QLabel;
    volMuteLabel->setPixmap( QPixmap( ":/volume-medium" ) );
    volMuteLabel->installEventFilter( hVolLabel );

    if( b_shiny )
    {
        volumeSlider = new SoundSlider( this,
            config_GetInt( p_intf, "volume-step" ),
            config_GetInt( p_intf, "qt-volume-complete" ),
            config_GetPsz( p_intf, "qt-slider-colours" ) );
    }
    else
    {
        volumeSlider = new QSlider( this );
        volumeSlider->setOrientation( Qt::Horizontal );
    }
    volumeSlider->setMaximumSize( QSize( 200, 40 ) );
    volumeSlider->setMinimumSize( QSize( 106, 30 ) );
    volumeSlider->setFocusPolicy( Qt::NoFocus );

    /* Set the volume from the config */
    volumeSlider->setValue( ( config_GetInt( p_intf, "volume" ) ) *
                              VOLUME_MAX / (AOUT_VOLUME_MAX/2) );

    /* Force the update at build time in order to have a muted icon if needed */
    updateVolume( volumeSlider->value() );

    /* Volume control connection */
    CONNECT( volumeSlider, valueChanged( int ), this, updateVolume( int ) );
    CONNECT( THEMIM, volumeChanged( void ), this, updateVolume( void ) );

    if( !b_fsCreation )
    {
        controlLayout = new QGridLayout( this );

        controlLayout->setSpacing( 0 );
        controlLayout->setLayoutMargins( 7, 5, 7, 3, 6 );

        controlLayout->addWidget( slider, 0, 1, 1, 16 );
        controlLayout->addWidget( slowerButton, 0, 0 );
        controlLayout->addWidget( fasterButton, 0, 17 );

        controlLayout->addWidget( advControls, 1, 3, 2, 4, Qt::AlignBottom );
        controlLayout->addWidget( discFrame, 1, 10, 2, 3, Qt::AlignBottom );
        controlLayout->addWidget( telexFrame, 1, 10, 2, 4, Qt::AlignBottom );

        controlLayout->addWidget( playButton, 2, 0, 2, 2 );
        controlLayout->setColumnMinimumWidth( 2, 20 );
        controlLayout->setColumnStretch( 2, 0 );

        controlLayout->addLayout( controlButLayout, 3, 3, 1, 3 );
        controlLayout->setColumnMinimumWidth( 7, 20 );
        controlLayout->setColumnStretch( 7, 0 );
        controlLayout->setColumnStretch( 8, 0 );
        controlLayout->setColumnStretch( 9, 0 );

        controlLayout->addWidget( fullscreenButton, 3, 10, Qt::AlignBottom );
        controlLayout->addWidget( playlistButton, 3, 11, Qt::AlignBottom );
        controlLayout->addWidget( extSettingsButton, 3, 12, Qt::AlignBottom );

        controlLayout->setColumnStretch( 13, 0 );
        controlLayout->setColumnMinimumWidth( 13, 24 );
        controlLayout->setColumnStretch( 14, 5 );

        controlLayout->addWidget( volMuteLabel, 3, 15, Qt::AlignBottom );
        controlLayout->addWidget( volumeSlider, 2, 16, 2 , 2, Qt::AlignBottom );
    }

    updateInput();
}

ControlsWidget::~ControlsWidget()
{}

void ControlsWidget::toggleTeletext()
{
    bool b_enabled = THEMIM->teletextState();
    if( b_telexEnabled )
    {
        telexTransparent->setEnabled( false );
        telexPage->setEnabled( false );
        b_telexEnabled = false;
    }
    else if( b_enabled )
    {
        telexTransparent->setEnabled( true );
        telexPage->setEnabled( true );
        b_telexEnabled = true;
    }
}

void ControlsWidget::enableTeletext( bool b_enable )
{
    telexFrame->setVisible( b_enable );
    bool b_on = THEMIM->teletextState();

    telexOn->setChecked( b_on );
    telexTransparent->setEnabled( b_on );
    telexPage->setEnabled( b_on );
    b_telexEnabled = b_on;
}

void ControlsWidget::toggleTeletextTransparency()
{
    if( b_telexTransparent )
    {
        telexTransparent->setIcon( QIcon( ":/tvtelx" ) );
        telexTransparent->setToolTip( qtr( "Teletext" ) );
        b_telexTransparent = false;
    }
    else
    {
        telexTransparent->setIcon( QIcon( ":/tvtelx-transparent" ) );
        telexTransparent->setToolTip( qtr( "Transparent" ) );
        b_telexTransparent = true;
    }
}

void ControlsWidget::stop()
{
    THEMIM->stop();
}

void ControlsWidget::play()
{
    if( THEPL->current.i_size == 0 )
    {
        /* The playlist is empty, open a file requester */
        THEDP->openFileDialog();
        setStatus( 0 );
        return;
    }
    THEMIM->togglePlayPause();
}

void ControlsWidget::prev()
{
    THEMIM->prev();
}

void ControlsWidget::next()
{
    THEMIM->next();
}

void ControlsWidget::setNavigation( int navigation )
{
#define HELP_PCH N_( "Previous chapter" )
#define HELP_NCH N_( "Next chapter" )

    // 1 = chapter, 2 = title, 0 = no
    if( navigation == 0 )
    {
        discFrame->hide();
    } else if( navigation == 1 ) {
        prevSectionButton->setToolTip( qfu( HELP_PCH ) );
        nextSectionButton->setToolTip( qfu( HELP_NCH ) );
        menuButton->show();
        discFrame->show();
    } else {
        prevSectionButton->setToolTip( qfu( HELP_PCH ) );
        nextSectionButton->setToolTip( qfu( HELP_NCH ) );
        menuButton->hide();
        discFrame->show();
    }
}

static bool b_my_volume;
void ControlsWidget::updateVolume( int i_sliderVolume )
{
    if( !b_my_volume )
    {
        int i_res = i_sliderVolume  * (AOUT_VOLUME_MAX / 2) / VOLUME_MAX;
        aout_VolumeSet( p_intf, i_res );
    }
    if( i_sliderVolume == 0 )
    {
        volMuteLabel->setPixmap( QPixmap(":/volume-muted" ) );
        volMuteLabel->setToolTip( qtr( "Unmute" ) );
        return;
    }

    if( i_sliderVolume < VOLUME_MAX / 3 )
        volMuteLabel->setPixmap( QPixmap( ":/volume-low" ) );
    else if( i_sliderVolume > (VOLUME_MAX * 2 / 3 ) )
        volMuteLabel->setPixmap( QPixmap( ":/volume-high" ) );
    else volMuteLabel->setPixmap( QPixmap( ":/volume-medium" ) );
    volMuteLabel->setToolTip( qtr( "Mute" ) );
}

void ControlsWidget::updateVolume()
{
    /* Audio part */
    audio_volume_t i_volume;
    aout_VolumeGet( p_intf, &i_volume );
    i_volume = ( i_volume *  VOLUME_MAX )/ (AOUT_VOLUME_MAX/2);
    int i_gauge = volumeSlider->value();
    b_my_volume = false;
    if( i_volume - i_gauge > 1 || i_gauge - i_volume > 1 )
    {
        b_my_volume = true;
        volumeSlider->setValue( i_volume );
        b_my_volume = false;
    }
}