intf.cpp

来自「VLC媒体播放程序」· C++ 代码 · 共 510 行 · 第 1/2 页

}

/*****************************************************************************
 * DateDisplay: display date
 *****************************************************************************
 * This function displays the current date in the date label.
 *****************************************************************************/
void IntfWindow::DateDisplay( int i_range )
{
    if( p_intf->p_sys->p_input )
    {
        char psz_time[ MSTRTIME_MAX_SIZE ];

        vlc_mutex_lock( &p_intf->p_sys->p_input->stream.stream_lock );
        p_date->setText( input_OffsetToTime( p_intf->p_sys->p_input, psz_time,
           ( p_intf->p_sys->p_input->stream.p_selected_area->i_size * i_range )
               / SLIDER_MAX ) );
        vlc_mutex_unlock( &p_intf->p_sys->p_input->stream.stream_lock );
    }
}

/*****************************************************************************
 * FileOpen: open a file
 *****************************************************************************
 * This function opens a file requester and adds the selected file to
 * the playlist.
 *****************************************************************************/
void IntfWindow::FileOpen( void )
{
    playlist_t *p_playlist;
    QString file = QFileDialog::getOpenFileName( QString::null,
                                                 QString::null, this );

    if( file.isEmpty() )
    {
        statusBar()->message( "No file loaded", 2000 );
    }
    else
    {
        p_playlist = (playlist_t *)
                vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
        if( p_playlist == NULL )
        {
            return;
        }

        playlist_Add( p_playlist, file.latin1(), file.latin1(),
                      PLAYLIST_APPEND | PLAYLIST_GO, PLAYLIST_END );
        vlc_object_release( p_playlist );
    }
}

/*****************************************************************************
 * FileQuit: terminate vlc
 *****************************************************************************/
void IntfWindow::FileQuit( void )
{
    p_intf->p_vlc->b_die = VLC_TRUE;
}

/*****************************************************************************
 * About: display the "about" box
 *****************************************************************************
 * This function displays a simple "about" box with copyright information.
 *****************************************************************************/
void IntfWindow::About( void )
{
    QMessageBox::about( this, "About",
        "VideoLAN Client\n"
        "(C) 1996, 1997, 1998, 1999, 2000, 2001, 2002 - the VideoLAN Team\n"
        "\n"
        "This is the VideoLAN client, a DVD and MPEG player.\n"
        "It can play MPEG and MPEG 2 files from a file "
            "or from a network source.\n"
        "\n"
        "More information: http://www.videolan.org/" );
}

/*****************************************************************************
 * Manage: manage main thread messages
 *****************************************************************************
 * In this function, called approx. 10 times a second, we check what the
 * main program wanted to tell us.
 *****************************************************************************/
void IntfWindow::Manage( void )
{
    /* Update the input */
    if( p_intf->p_sys->p_input == NULL )
    {
        p_intf->p_sys->p_input = (input_thread_t *)
                vlc_object_find( p_intf, VLC_OBJECT_INPUT, FIND_ANYWHERE );
    }
    else if( p_intf->p_sys->p_input->b_dead )
    {
        vlc_object_release( p_intf->p_sys->p_input );
        p_intf->p_sys->p_input = NULL;
    }

    /* Manage the slider */
    if( p_intf->p_sys->p_input && p_intf->p_sys->p_input->stream.b_seekable )
    {
        int i_value = p_slider->value();

#define p_area p_intf->p_sys->p_input->stream.p_selected_area
        /* If the user hasn't touched the slider since the last time,
         * then the input can safely change it */
        if( i_value == p_slider->oldvalue() )
        {
            i_value = ( SLIDER_MAX * p_area->i_tell ) / p_area->i_size;

            p_slider->setValue( i_value );
            p_slider->setOldValue( i_value );
        }
        /* Otherwise, send message to the input if the user has
         * finished dragging the slider */
        else if( p_slider->b_free )
        {
            off_t i_seek = ( i_value * p_area->i_size ) / SLIDER_MAX;

            input_Seek( p_intf->p_sys->p_input, i_seek, INPUT_SEEK_SET );

            /* Update the old value */
            p_slider->setOldValue( i_value );
        }
#undef p_area
    }

    /* If the "display popup" flag has changed, popup the context menu */
    if( p_intf->b_menu_change )
    {
        p_popup->popup( QCursor::pos() );
        p_intf->b_menu_change = 0;
    }

    if( p_intf->b_die )
    {
        qApp->quit();
    }
}

/*****************************************************************************
 * PlaybackPlay: play
 *****************************************************************************/
void IntfWindow::PlaybackPlay( void )
{
    if( p_intf->p_sys->p_input != NULL )
    {
        input_SetStatus( p_intf->p_sys->p_input, INPUT_STATUS_PLAY );
    }
}

/*****************************************************************************
 * PlaybackPause: pause
 *****************************************************************************/
void IntfWindow::PlaybackPause( void )
{
    if( p_intf->p_sys->p_input != NULL )
    {
        input_SetStatus( p_intf->p_sys->p_input, INPUT_STATUS_PAUSE );
    }
}

/*****************************************************************************
 * PlaybackSlow: slow
 *****************************************************************************/
void IntfWindow::PlaybackSlow( void )
{
    if( p_intf->p_sys->p_input != NULL )
    {
        input_SetStatus( p_intf->p_sys->p_input, INPUT_STATUS_SLOWER );
    }
}

/*****************************************************************************
 * PlaybackFast: fast
 *****************************************************************************/
void IntfWindow::PlaybackFast( void )
{
    if( p_intf->p_sys->p_input != NULL )
    {
        input_SetStatus( p_intf->p_sys->p_input, INPUT_STATUS_FASTER );
    }
}

/*****************************************************************************
 * PlaylistPrev: previous playlist entry
 *****************************************************************************/
void IntfWindow::PlaylistPrev( void )
{
    playlist_t *p_playlist = (playlist_t *)
        vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );

    if( p_playlist == NULL )
    {
        return;
    }

    playlist_Prev( p_playlist );
    vlc_object_release( p_playlist );
}

/*****************************************************************************
 * PlaylistNext: next playlist entry
 *****************************************************************************/
void IntfWindow::PlaylistNext( void )
{
    playlist_t *p_playlist = (playlist_t *)
        vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );

    if( p_playlist == NULL )
    {
        return;
    }

    playlist_Next( p_playlist );
    vlc_object_release( p_playlist );
}

/*****************************************************************************
 * IntfSlider: slider creator
 *****************************************************************************
 * This function creates the slider, sets its default values, and connects
 * the interesting signals.
 *****************************************************************************/
IntfSlider::IntfSlider( intf_thread_t *p_intf, QWidget *p_parent )
           :QSlider( Horizontal, p_parent )
{
    this->p_intf = p_intf;

    setRange( SLIDER_MIN, SLIDER_MAX );
    setPageStep( SLIDER_STEP );

    setValue( SLIDER_MIN );
    setOldValue( SLIDER_MIN );

    setTracking( TRUE );
    b_free = TRUE;

    connect( this, SIGNAL(sliderMoved(int)), this, SLOT(SlideStart()) );
    connect( this, SIGNAL(sliderPressed()), this, SLOT(SlideStart()) );
    connect( this, SIGNAL(sliderReleased()), this, SLOT(SlideStop()) );
}

/*****************************************************************************
 * ~IntfSlider: slider destructor
 *****************************************************************************
 * This function is called when the interface slider is destroyed.
 *****************************************************************************/
IntfSlider::~IntfSlider( void )
{
    /* We don't need to remove anything */
}