C++ VarManager类代码示例

void TopWindow::onControlRelease( const CtrlGeneric &rCtrl )
{
    // Release the capturing control
    if( m_pCapturingControl == &rCtrl )
    {
        m_pCapturingControl = NULL;
    }
    else
    {
        msg_Dbg( getIntf(), "Control had not captured the mouse" );
    }

    // Send an enter event to the control under the mouse, if it doesn't
    // have received it yet
    if( m_pLastHitControl && m_pLastHitControl != &rCtrl )
    {
        EvtEnter evt( getIntf() );
        m_pLastHitControl->handleEvent( evt );

        // Show the tooltip
        m_rWindowManager.hideTooltip();
        UString tipText = m_pLastHitControl->getTooltipText();
        if( tipText.length() > 0 )
        {
            // Set the tooltip text variable
            VarManager *pVarManager = VarManager::instance( getIntf() );
            pVarManager->getTooltipText().set( tipText );
            m_rWindowManager.showTooltip();
        }
    }
}

void TopWindow::processEvent( EvtMotion &rEvtMotion )
{
    // New control hit by the mouse
    CtrlGeneric *pNewHitControl =
        findHitControl( rEvtMotion.getXPos() - getLeft(),
                        rEvtMotion.getYPos() - getTop() );

    setLastHit( pNewHitControl );

    /// Update the help text
    VarManager *pVarManager = VarManager::instance( getIntf() );
    if( pNewHitControl )
    {
        pVarManager->getHelpText().set( pNewHitControl->getHelpText() );
    }

    // Send a motion event to the hit control, or to the control
    // that captured the mouse, if any
    CtrlGeneric *pActiveControl = pNewHitControl;
    if( m_pCapturingControl )
    {
        pActiveControl = m_pCapturingControl;
    }
    if( pActiveControl )
    {
        // Compute the coordinates relative to the window
        int xPos = rEvtMotion.getXPos() - getLeft();
        int yPos = rEvtMotion.getYPos() - getTop();
        // Send a motion event
        EvtMotion evt( getIntf(), xPos, yPos );
        pActiveControl->handleEvent( evt );
    }
}

void VarText::set( const UString &rText )
{
    // Avoid an infinite loop
    if( rText == m_text )
    {
        return;
    }

    m_text = rText;

    if( m_substVars )
    {
        // Stop observing other variables
        delObservers();

        VlcProc *pVlcProc = VlcProc::instance( getIntf() );
        VarManager *pVarManager = VarManager::instance( getIntf() );

        // Observe needed variables
        if( m_text.find( "$H" ) != UString::npos )
        {
            pVarManager->getHelpText().addObserver( this );
        }
        if( m_text.find( "$T" ) != UString::npos ||
            m_text.find( "$t" ) != UString::npos ||
            m_text.find( "$L" ) != UString::npos ||
            m_text.find( "$l" ) != UString::npos ||
            m_text.find( "$D" ) != UString::npos ||
            m_text.find( "$d" ) != UString::npos )
        {
            pVlcProc->getTimeVar().addObserver( this );
        }
        if( m_text.find( "$V" ) != UString::npos )
        {
            pVlcProc->getVolumeVar().addObserver( this );
        }
        if( m_text.find( "$N" ) != UString::npos )
        {
            pVlcProc->getStreamNameVar().addObserver( this );
        }
        if( m_text.find( "$F" ) != UString::npos )
        {
            pVlcProc->getStreamURIVar().addObserver( this );
        }
        if( m_text.find( "$B" ) != UString::npos )
        {
            pVlcProc->getStreamBitRateVar().addObserver( this );
        }
        if( m_text.find( "$S" ) != UString::npos )
        {
            pVlcProc->getStreamSampleRateVar().addObserver( this );
        }
        if( m_text.find( "$R" ) != UString::npos )
        {
            pVlcProc->getSpeedVar().addObserver( this );
        }
    }

    notify();
}

void TopWindow::onTooltipChange( const CtrlGeneric &rCtrl )
{
    // Check that the control is the active one
    if( m_pLastHitControl && m_pLastHitControl == &rCtrl )
    {
        // Set the tooltip text variable
        VarManager *pVarManager = VarManager::instance( getIntf() );
        pVarManager->getTooltipText().set( rCtrl.getTooltipText() );
    }
}

WindowManager::WindowManager( intf_thread_t *pIntf ):
    SkinObject( pIntf ), m_magnet( 0 ), m_alpha( 255 ), m_moveAlpha( 255 ),
    m_opacityEnabled( false ), m_opacity( 255 ), m_direction( kNone ),
    m_maximizeRect(0, 0, 50, 50), m_pTooltip( NULL ), m_pPopup( NULL )
{
    // Create and register a variable for the "on top" status
    VarManager *pVarManager = VarManager::instance( getIntf() );
    m_cVarOnTop = VariablePtr( new VarBoolImpl( getIntf() ) );
    pVarManager->registerVar( m_cVarOnTop, "vlc.isOnTop" );

    // transparency switched on or off by user
    m_opacityEnabled = var_InheritBool( getIntf(), "skins2-transparency" );

    // opacity overridden by user
    m_opacity = 255 * var_InheritFloat( getIntf(), "qt-opacity" );
}

void IniFile::parseFile()
{
    VarManager *pVarManager = VarManager::instance( getIntf() );

    // Open the file
    std::fstream fs( m_path.c_str(), std::fstream::in );
    if( fs.is_open() )
    {
        std::string section;
        std::string line;
        while( !fs.eof() )
        {
            // Read the next line
            fs >> line;

            switch( line[0] )
            {
            // "[section]" line ?
            case '[':
                section = line.substr( 1, line.size() - 2);
                break;

            // Comment
            case ';':
            case '#':
                break;

            // Variable declaration
            default:
                size_t eqPos = line.find( '=' );
                std::string var = line.substr( 0, eqPos );
                std::string val = line.substr( eqPos + 1, line.size() - eqPos - 1);

                std::string name = m_name + "." + section + "." + var;

                // Convert to lower case because of some buggy winamp2 skins
                for( size_t i = 0; i < name.size(); i++ )
                {
                    name[i] = tolower( (unsigned char)name[i] );
                }

                // Register the value in the var manager
                pVarManager->registerConst( name, val );
            }
        }
        fs.close();
    }

void TopWindow::onTooltipChange( const CtrlGeneric &rCtrl )
{
    // Check that the control is the active one
    if( m_pLastHitControl && m_pLastHitControl == &rCtrl )
    {
        if( rCtrl.getTooltipText().size() )
        {
            // Set the tooltip text variable
            VarManager *pVarManager = VarManager::instance( getIntf() );
            pVarManager->getTooltipText().set( rCtrl.getTooltipText() );
            m_rWindowManager.showTooltip();
        }
        else
        {
            // Nothing to display, so hide the tooltip
            m_rWindowManager.hideTooltip();
        }
    }
}

void VarText::delObservers()
{
    // Stop observing other variables

    VlcProc *pVlcProc = getIntf()->p_sys->p_vlcProc;
    VarManager *pVarManager = getIntf()->p_sys->p_varManager;

    if( pVlcProc )
    {
        pVlcProc->getTimeVar().delObserver( this );
        pVlcProc->getVolumeVar().delObserver( this );
        pVlcProc->getSpeedVar().delObserver( this );
        pVlcProc->getStreamNameVar().delObserver( this );
        pVlcProc->getStreamURIVar().delObserver( this );
        pVlcProc->getStreamBitRateVar().delObserver( this );
        pVlcProc->getStreamSampleRateVar().delObserver( this );
    }

    if( pVarManager )
        pVarManager->getHelpText().delObserver( this );
}

VlcProc::VlcProc( intf_thread_t *pIntf ): SkinObject( pIntf ),
    m_varEqBands( pIntf ), m_pVout( NULL ), m_pAout( NULL ),
    m_bEqualizer_started( false )
{
    // Create and register VLC variables
    VarManager *pVarManager = VarManager::instance( getIntf() );

#define REGISTER_VAR( var, type, name ) \
    var = VariablePtr( new type( getIntf() ) ); \
    pVarManager->registerVar( var, name );
    REGISTER_VAR( m_cVarRandom, VarBoolImpl, "playlist.isRandom" )
    REGISTER_VAR( m_cVarLoop, VarBoolImpl, "playlist.isLoop" )
    REGISTER_VAR( m_cVarRepeat, VarBoolImpl, "playlist.isRepeat" )
    REGISTER_VAR( m_cPlaytree, Playtree, "playtree" )
    pVarManager->registerVar( getPlaytreeVar().getPositionVarPtr(),
                              "playtree.slider" );
    pVarManager->registerVar( m_cVarRandom, "playtree.isRandom" );
    pVarManager->registerVar( m_cVarLoop, "playtree.isLoop" );

    REGISTER_VAR( m_cVarPlaying, VarBoolImpl, "vlc.isPlaying" )
    REGISTER_VAR( m_cVarStopped, VarBoolImpl, "vlc.isStopped" )
    REGISTER_VAR( m_cVarPaused, VarBoolImpl, "vlc.isPaused" )

    /* Input variables */
    pVarManager->registerVar( m_cVarRepeat, "playtree.isRepeat" );
    REGISTER_VAR( m_cVarTime, StreamTime, "time" )
    REGISTER_VAR( m_cVarSeekable, VarBoolImpl, "vlc.isSeekable" )
    REGISTER_VAR( m_cVarDvdActive, VarBoolImpl, "dvd.isActive" )

    REGISTER_VAR( m_cVarRecordable, VarBoolImpl, "vlc.canRecord" )
    REGISTER_VAR( m_cVarRecording, VarBoolImpl, "vlc.isRecording" )

    /* Vout variables */
    REGISTER_VAR( m_cVarFullscreen, VarBoolImpl, "vlc.isFullscreen" )
    REGISTER_VAR( m_cVarHasVout, VarBoolImpl, "vlc.hasVout" )

    /* Aout variables */
    REGISTER_VAR( m_cVarHasAudio, VarBoolImpl, "vlc.hasAudio" )
    REGISTER_VAR( m_cVarVolume, Volume, "volume" )
    REGISTER_VAR( m_cVarMute, VarBoolImpl, "vlc.isMute" )
    REGISTER_VAR( m_cVarEqualizer, VarBoolImpl, "equalizer.isEnabled" )
    REGISTER_VAR( m_cVarEqPreamp, EqualizerPreamp, "equalizer.preamp" )

#undef REGISTER_VAR
    m_cVarSpeed = VariablePtr( new VarText( getIntf(), false ) );
    pVarManager->registerVar( m_cVarSpeed, "speed" );
    SET_TEXT( m_cVarSpeed, UString( getIntf(), "1") );
    m_cVarStreamName = VariablePtr( new VarText( getIntf(), false ) );
    pVarManager->registerVar( m_cVarStreamName, "streamName" );
    m_cVarStreamURI = VariablePtr( new VarText( getIntf(), false ) );
    pVarManager->registerVar( m_cVarStreamURI, "streamURI" );
    m_cVarStreamBitRate = VariablePtr( new VarText( getIntf(), false ) );
    pVarManager->registerVar( m_cVarStreamBitRate, "bitrate" );
    m_cVarStreamSampleRate = VariablePtr( new VarText( getIntf(), false ) );
    pVarManager->registerVar( m_cVarStreamSampleRate, "samplerate" );
    m_cVarStreamArt = VariablePtr( new VarString( getIntf() ) );
    pVarManager->registerVar( m_cVarStreamArt, "streamArt" );

    // Register the equalizer bands
    for( int i = 0; i < EqualizerBands::kNbBands; i++)
    {
        stringstream ss;
        ss << "equalizer.band(" << i << ")";
        pVarManager->registerVar( m_varEqBands.getBand( i ), ss.str() );
    }

    // XXX WARNING XXX
    // The object variable callbacks are called from other VLC threads,
    // so they must put commands in the queue and NOT do anything else
    // (X11 calls are not reentrant)

#define ADD_CALLBACK( p_object, var ) \
    var_AddCallback( p_object, var, onGenericCallback, this );

    ADD_CALLBACK( pIntf->p_sys->p_playlist, "volume" )
    ADD_CALLBACK( pIntf->p_libvlc, "intf-toggle-fscontrol" )

    ADD_CALLBACK( pIntf->p_sys->p_playlist, "item-current" )
    ADD_CALLBACK( pIntf->p_sys->p_playlist, "random" )
    ADD_CALLBACK( pIntf->p_sys->p_playlist, "loop" )
    ADD_CALLBACK( pIntf->p_sys->p_playlist, "repeat" )

#undef ADD_CALLBACK

    // Called when a playlist item is added
    var_AddCallback( pIntf->p_sys->p_playlist, "playlist-item-append",
                     onItemAppend, this );
    // Called when a playlist item is deleted
    // TODO: properly handle item-deleted
    var_AddCallback( pIntf->p_sys->p_playlist, "playlist-item-deleted",
                     onItemDelete, this );
    // Called when the current input changes
    var_AddCallback( pIntf->p_sys->p_playlist, "input-current",
                     onInputNew, this );
    // Called when a playlist item changed
    var_AddCallback( pIntf->p_sys->p_playlist, "item-change",
                     onItemChange, this );

    // Called when we have an interaction dialog to display
    var_Create( pIntf, "interaction", VLC_VAR_ADDRESS );
//.........这里部分代码省略.........