equalizersetup.cpp

来自「Amarok是一款在LINUX或其他类UNIX操作系统中运行的音频播放器软件。 」· C++ 代码 · 共 496 行 · 第 1/2 页

    }

    QDomNode n = d.namedItem( "equalizerpresets" ).namedItem("preset");

    for( ; !n.isNull();  n = n.nextSibling() )
    {
        QDomElement e = n.toElement();
        QString title = e.attribute( "name" );

        QValueList<int> gains;
        gains << e.namedItem( "b0" ).toElement().text().toInt();
        gains << e.namedItem( "b1" ).toElement().text().toInt();
        gains << e.namedItem( "b2" ).toElement().text().toInt();
        gains << e.namedItem( "b3" ).toElement().text().toInt();
        gains << e.namedItem( "b4" ).toElement().text().toInt();
        gains << e.namedItem( "b5" ).toElement().text().toInt();
        gains << e.namedItem( "b6" ).toElement().text().toInt();
        gains << e.namedItem( "b7" ).toElement().text().toInt();
        gains << e.namedItem( "b8" ).toElement().text().toInt();
        gains << e.namedItem( "b9" ).toElement().text().toInt();

        m_presets[ title ] = gains;
    }

    file.close();
}


void
EqualizerSetup::savePresets()
{
    QFile file( presetsCache() );

    if( !file.open( IO_WriteOnly ) ) return;

    QDomDocument doc;
    QDomElement e = doc.createElement("equalizerpresets");
    e.setAttribute( "product", "Amarok" );
    e.setAttribute( "version", APP_VERSION );
    e.setAttribute( "formatversion", "1.1" );

    doc.appendChild( e );

    QStringList info;
    info << "b0" << "b1" << "b2" << "b3" << "b4"
         << "b5" << "b6" << "b7" << "b8" << "b9";

    for( uint x = 0; x < m_presets.count(); x++ )
    {
        const QString title = m_presetCombo->text( x );

        // don't save the 'Zero' preset
        if ( title == i18n("Zero") )
            continue;

        QValueList<int> gains = m_presets[ title ];

        QDomElement i = doc.createElement("preset");
        i.setAttribute( "name", title );

        QDomElement attr;
        QDomText t;
        for( uint y=0; y < info.count(); y++ )
        {
            attr = doc.createElement( info[y] );
            t    = doc.createTextNode( QString::number( gains.first() ) );
            attr.appendChild( t );
            i.appendChild( attr );
            gains.pop_front();
        }
        e.appendChild( i );
    }

    QTextStream stream( &file );
    stream.setEncoding( QTextStream::UnicodeUTF8 );
    stream << "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
    stream << doc.toString();
    file.close();
}

void
EqualizerSetup::editPresets()
{
    EqualizerPresetManager * editor = new EqualizerPresetManager(this);
    editor->setPresets(m_presets);

    if ( editor->exec() ) {
        QMap< QString, QValueList<int> > presets = editor->presets();

        QString currentTitle = m_presetCombo->currentText();
        QValueList<int> currentGains= m_presets[ currentTitle ];

        QString newTitle = currentTitle;

        // Check if the selected item was renamed
        if ( presets.find( currentTitle ) == presets.end() || currentGains != presets[ currentTitle ] ) {

            // Find the new name
            QMap< QString, QValueList<int> >::Iterator end = presets.end();
            for ( QMap< QString, QValueList<int> >::Iterator it = presets.begin(); it != end; ++it ) {
                if ( it.data() == currentGains ) {
                    newTitle = it.key();
                    break;
                }
            }
        }

        m_presets = presets;
        updatePresets( newTitle );
    }

    delete editor;
}

void
EqualizerSetup::addPreset()
{
    bool ok;
    const QString title = KInputDialog::getText( i18n("Add Equalizer Preset"),
                                                 i18n("Enter preset name:"), i18n("Untitled"), &ok, this);

    if (ok) {
        // Check if the new preset title exists
        if ( m_presets.find( title ) != m_presets.end() ) {
            int button = KMessageBox::warningYesNo( this, i18n( "A preset with the name %1 already exists. Overwrite?" ).arg( title ) );

            if ( button != KMessageBox::Yes )
                return;
        }

        // Add the new preset based on the current slider positions
        QValueList <int> gains;
        for ( uint i = 0; i < m_bandSliders.count(); i++ )
            gains += m_bandSliders.at( i )->value();
        m_presets[ title ] = gains;

        // Rebuild the combobox
        updatePresets(title);

        // Save
        setEqualizerParameters();
    }
}

void
EqualizerSetup::updatePresets(QString selectTitle)
{
    // Save the selected item
    if ( selectTitle.isEmpty() )
        selectTitle = m_presetCombo->currentText();

    // Sort titles
    QStringList titles;
    QMap< QString, QValueList<int> >::Iterator end = m_presets.end();
    for ( QMap< QString, QValueList<int> >::Iterator it = m_presets.begin(); it != end; ++it )
        titles << it.key();

    titles.sort();

    // rebuild preset combobox and look for the previously selected title
    int i = 0;
    int newIndex = -1;
    m_presetCombo->clear();
    QStringList::Iterator titlesEnd = titles.end();
    for ( QStringList::Iterator it = titles.begin(); it != titlesEnd; ++it ) {
        m_presetCombo->insertItem( *it );
        if ( *it == selectTitle )
            newIndex = i;
        if ( *it == i18n("Manual") )
            m_manualPos = i;
        i++;
    }

    if ( newIndex == -1 )
        newIndex = m_manualPos;

    m_presetCombo->setCurrentItem( newIndex );
}

/////////////////////////////////////////////////////////////////////////////////////
// PRIVATE SLOTS
/////////////////////////////////////////////////////////////////////////////////////

void
EqualizerSetup::presetChanged( int id ) //SLOT
{
    presetChanged( m_presetCombo->text(id) );
}

void
EqualizerSetup::presetChanged( QString title ) //SLOT
{
    const QValueList<int> gains = m_presets[ title ];

    for ( uint i = 0; i < m_bandSliders.count(); i++ ) {
        // Block signals to prevent unwanted setting to 'Manual'
        m_bandSliders.at(i)->blockSignals(true);
        m_bandSliders.at(i)->setValue( ( *gains.at(i) ) );
        m_bandSliders.at(i)->blockSignals(false);
    }

    setEqualizerParameters();
}

void
EqualizerSetup::setEqualizerEnabled( bool active ) //SLOT
{
    EngineController::engine()->setEqualizerEnabled( active );
    AmarokConfig::setEqualizerEnabled( active );

    if( active )
        //this way the developer of the eq doesn't have to cache the eq values
        setEqualizerParameters();
    else
        // zero the graph
        m_equalizerGraph->update();
}


void
EqualizerSetup::setEqualizerParameters() //SLOT
{
    AmarokConfig::setEqualizerPreamp( m_slider_preamp->value() );
    AmarokConfig::setEqualizerPreset( m_presetCombo->currentText() );
    AmarokConfig::setEqualizerGains ( m_presets[ m_presetCombo->currentText() ] );

    // Transfer values to the engine if the EQ is enabled
    if ( AmarokConfig::equalizerEnabled() )
        EngineController::engine()->setEqualizerParameters( m_slider_preamp->value(), m_presets[ m_presetCombo->currentText() ] );

    m_equalizerGraph->update();
}


void
EqualizerSetup::sliderChanged() //SLOT
{
    m_presetCombo->setCurrentItem( m_manualPos );

    QValueList<int> gains;
    for ( uint i = 0; i < m_bandSliders.count(); i++ )
        gains += m_bandSliders.at( i )->value();

    m_presets[ i18n("Manual") ] = gains;
}

#include "equalizersetup.moc"