QComboBox с линиями

cLineStyleComboBox::cLineStyleComboBox( QWidget * parent )
    : QComboBox( parent )
    , width_( 92 )
    , height_( 16 )
    , thickness_( 0 )
    , color_( QColor( Qt::black ) )
    , styles_( QList< Qt::PenStyle >() )
{
    setCurrentIndex( 0 );

    setIconSize( QSize( width_, height_ ) );

    styles_ << Qt::SolidLine << Qt::DashLine << Qt::DotLine << Qt::DashDotLine << Qt::DashDotDotLine;

    for( int i = 0; i < styles_.count(); i++ )
        addItem( QString() );
}

cLineStyleComboBox::~cLineStyleComboBox()
{

}

void cLineStyleComboBox::setLineThickness( double thickness )
{
    if( thickness_ != thickness )
    {
        thickness_ = thickness;
        repaint();
    }
}

void cLineStyleComboBox::setLineColor( QColor color )
{
    if( color != color_ )
    {
        color_ = color;
        repaint();
    }
}

void cLineStyleComboBox::paintEvent( QPaintEvent * event )
{
    QBrush brush( color_ );
    for( int i = 0; i < styles_.count(); i++ )
    {
        QBitmap pix( iconSize() );
        pix.clear();
        QPainter painter( &pix );

        painter.setPen( QPen( brush, thickness_, styles_[ i ], Qt::RoundCap ) );
        painter.drawLine( 2, height_ / 2, width_ - 2, height_ / 2 );
        setItemIcon( i, pix );
    }

    QStylePainter stylePainter(this);

    QStyleOptionComboBox opt;
    initStyleOption(&opt);
    stylePainter.drawComplexControl(QStyle::CC_ComboBox, opt);

    QRect rect = stylePainter.style()->subControlRect(QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxEditField, this);
    int height = rect.height();
    int width = rect.width();

    stylePainter.setPen( QPen( brush, thickness_, styles_[ currentIndex() ] , Qt::RoundCap ) );
    stylePainter.drawLine( 10, height / 2 + 2, width - 2, height / 2 + 2 );
}