source: trunk/src/styles/qinterlacestyle.cpp@ 144

/****************************************************************************
** $Id: qinterlacestyle.cpp 2 2005-11-16 15:49:26Z dmik $
**
** Implementation of QInterlaceStyle class
**
** Created : 010122
**
** Copyright (C) 1992-2001 Trolltech AS.  All rights reserved.
**
** This file is part of the widgets module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
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** licenses may use this file in accordance with the Qt Commercial License
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**********************************************************************/

#if 0 // ###### not ported to new API yet

#include "qinterlacestyle.h"

#if !defined(QT_NO_STYLE_INTERLACE) || defined(QT_PLUGIN)

#include "qapplication.h"
#include "qpainter.h"
#include "qdrawutil.h" // for now
#include "qpalette.h" // for now
#include "qwidget.h"
#include "qlabel.h"
#include "qpushbutton.h"
#include "qwidget.h"
#include "qrangecontrol.h"
#include "qscrollbar.h"
#include "qlistbox.h"

#include <limits.h>

/*!
  \class QInterlaceStyle qinterlacestyle.h
  \brief The QInterlaceStyle class provides a Look and Feel suitable for interlaced displays.
  \ingroup appearance

  This class implements a look and feel that reduces flicker as much as
  possible on interlaced displays (i.e. television).  It is an experimental
  style.  In addition to using this style you will need to select a font
  that does not flicker.
*/

/*!
  Constructs a QInterlaceStyle
*/
QInterlaceStyle::QInterlaceStyle() : QMotifStyle()
{
    setUseHighlightColors( TRUE );
}

/*! \reimp
*/
int QInterlaceStyle::buttonDefaultIndicatorWidth() const
{
    return 0;
}

/*! \reimp
*/
int QInterlaceStyle::setSliderThickness() const
{
    return 18;
}

/*! \reimp
*/
QSize QInterlaceStyle::scrollBarExtent() const
{
    return QSize( 18, 18 );
}

/*! \reimp
*/
int QInterlaceStyle::defaultFrameWidth() const
{
    return 2;
}

/*!
  \reimp
 */
void QInterlaceStyle::polish( QApplication *app)
{
    oldPalette = app->palette();
#if 0
    QColor bg( 128, 64, 128 );
    QColor btn( 255, 145, 0 );
    QColor mid = bg.dark( 120 );
    QColor low = mid.dark( 120 );
    QColor fg( white );
#else
    QColor bg( 224, 224, 224 );
    QColor btn = bg.dark( 105 );
    QColor mid = bg.dark( 120 );
    QColor low = mid.dark( 120 );
    QColor fg( black );
#endif

    QColorGroup cg( fg, btn, low, low, mid, black, black, white, bg );
    cg.setColor( QColorGroup::Highlight, QColor( 255, 255, 192 ) );
    cg.setColor( QColorGroup::HighlightedText, black );

    QColorGroup dcg( cg );
    dcg.setColor( QColorGroup::ButtonText, low );
    dcg.setColor( QColorGroup::Text, low );

    app->setPalette( QPalette( cg, dcg, cg ), TRUE );
}

/*!
  \reimp
 */
void QInterlaceStyle::unPolish( QApplication *app)
{
    app->setPalette(oldPalette, TRUE);
}

/*!
  \reimp
 */
void QInterlaceStyle::polish( QWidget* w)
{

   // the polish function sets some widgets to transparent mode and
    // some to translate background mode in order to get the full
    // benefit from the nice pixmaps in the color group.

    if ( w->inherits("QLCDNumber") ){
        return;
    }

    if ( !w->isTopLevel() ) {
        if ( w->inherits("QGroupBox")
             || w->inherits("QTabWidget")
             || w->inherits("QPushButton") ) {
            w->setAutoMask( TRUE );
            return;
        }
        if (w->inherits("QLabel")
            || w->inherits("QSlider")
            || w->inherits("QButton")
            || w->inherits("QProgressBar")
            ){
            w->setBackgroundOrigin( QWidget::ParentOrigin );
        }
    }

    if ( w->inherits( "QFrame" ) ) {
        QFrame *f = (QFrame *)w;
        switch ( f->frameShape() ) {
            case QFrame::WinPanel:
                f->setFrameShape( QFrame::StyledPanel );

            case QFrame::Panel:
            case QFrame::Box:
            case QFrame::StyledPanel:
            case QFrame::PopupPanel:
                if ( f->frameWidth() == 1 )
                    f->setLineWidth( 2 );
                break;
            default:
                break;
        }
    }

    if ( w->inherits( "QListBox" ) ) {
        // the list box in combos has an ugly border otherwise
        QFrame *f = (QFrame *)w;
        if ( f->frameShadow() == QFrame::Plain ) {
            f->setFrameShadow( QFrame::Raised );
            f->setLineWidth( 1 );
        }
    }
}

/*!
  \reimp
*/
void QInterlaceStyle::unPolish( QWidget* w)
{

   // the polish function sets some widgets to transparent mode and
    // some to translate background mode in order to get the full
    // benefit from the nice pixmaps in the color group.

    if ( w->inherits("QLCDNumber") ){
        return;
    }

    if ( !w->isTopLevel() ) {
        if ( w->inherits("QGroupBox")
             || w->inherits("QTabWidget")
             || w->inherits("QPushButton" ) ) {
            w->setAutoMask( FALSE );
            return;
        }
        if (w->inherits("QLabel")
            || w->inherits("QSlider")
            || w->inherits("QButton")
            || w->inherits("QProgressBar")
            ){
            w->setBackgroundOrigin( QWidget::WidgetOrigin );
        }
    }

}

/*!
  \reimp
*/
QRect QInterlaceStyle::pushButtonContentsRect( QPushButton *btn )
{
    int fw = 0;
    if ( btn->isDefault() || btn->autoDefault() )
        fw = buttonDefaultIndicatorWidth();

    return buttonRect( fw+5, fw, btn->width()-2*fw-10, btn->height()-2*fw );
}

/*!
  \reimp
*/
void QInterlaceStyle::drawFocusRect ( QPainter *p, const QRect &/*r*/, const QColorGroup &g, const QColor * bg, bool /*atBorder*/ )
{
    if (bg ) {
        int h,s,v;
        bg->hsv(&h,&s,&v);
        if (v >= 128)
            p->setPen( Qt::black );
        else
            p->setPen( Qt::white );
    }
    else
        p->setPen( g.foreground() );
/*
    p->setBrush( NoBrush );
    if ( atBorder ) {
        p->drawRect( QRect( r.x()+1, r.y()+2, r.width()-2, r.height()-4 ) );
        p->drawRect( QRect( r.x()+2, r.y()+1, r.width()-4, r.height()-2 ) );
    } else {
        p->drawRect( QRect( r.x(), r.y()+1, r.width(), r.height()-2 ) );
        p->drawRect( QRect( r.x()+1, r.y(), r.width()-2, r.height() ) );
    }
*/
}

/*!
  \reimp
*/
void QInterlaceStyle::drawButton( QPainter *p, int x, int y, int w, int h,
                                  const QColorGroup &g, bool /* sunken */,
                                  const QBrush *fill )
{
    const int lineWidth = 2;

    p->setBrush( g.brush( QColorGroup::Dark ) );
    p->setPen( NoPen );
    p->drawRect( x+1, y+1, 2, 2 );
    p->drawRect( x+w-3, y+1, 2, 2 );
    p->drawRect( x+1, y+h-3, 2, 2 );
    p->drawRect( x+w-3, y+h-3, 2, 2 );

    p->drawRect( x+2, y, w-4, 2 );
    p->drawRect( x+2, y+h-lineWidth, w-4, lineWidth );
    p->drawRect( x, y+2, lineWidth, h-4 );
    p->drawRect( x+w-lineWidth, y+2, lineWidth, h-4 );

    if ( fill ) {
        x += 2;
        y += 2;
        w -= 4;
        h -= 4;
        p->setBrush( *fill );
        p->setPen( NoPen );
        p->drawRect( x+1, y, w-2, 1 );
        p->drawRect( x, y+1, w, h-2 );
        p->drawRect( x+1, y+h-1, w-2, 1 );
    }
}

/*! \reimp */
void QInterlaceStyle::drawButtonMask( QPainter * p, int x, int y, int w, int h )
{
    QBrush fill( color1 );
    QColorGroup cg;
    cg.setBrush( QColorGroup::Dark, color1 );
    drawButton( p, x, y, w, h, cg, FALSE, &fill );
}

/*!
  \reimp
*/
void QInterlaceStyle::drawBevelButton( QPainter *p, int x, int y, int w, int h,
                                       const QColorGroup &g, bool sunken, const QBrush* fill )
{
    QInterlaceStyle::drawButton(p, x, y, w, h, g, sunken, fill);
}

/*!
  \reimp
*/
void QInterlaceStyle::drawPushButton( QPushButton* btn, QPainter *p)
{
    QColorGroup g = btn->colorGroup();
    int x1, y1, x2, y2;

    btn->rect().coords( &x1, &y1, &x2, &y2 );   // get coordinates

    QBrush fill( g.button() );
    if ( btn->isDown() || btn->isOn() )
        fill = g.mid();

    if ( btn->hasFocus() )
        g.setBrush( QColorGroup::Dark, black );
    drawButton( p, x1, y1, x2-x1+1, y2-y1+1, g, FALSE, &fill );

    if ( btn->isMenuButton() ) {
        int dx = (y1-y2-4)/3;
        drawArrow( p, DownArrow, FALSE,
                   x2 - dx, dx, y1, y2 - y1,
                   g, btn->isEnabled() );
    }

    if ( p->brush().style() != NoBrush )
        p->setBrush( NoBrush );
}

/*!
  \reimp
*/
QSize QInterlaceStyle::indicatorSize () const
{
    return QSize(13,13);
}

/*!
  \reimp
*/
void QInterlaceStyle::drawIndicator( QPainter * p, int x, int y, int w, int h, const QColorGroup &g, int s, bool down, bool enabled )
{
    p->fillRect( x, y, w, h, g.brush( QColorGroup::Background ) );
    QBrush fill;
    if ( s == QButton::NoChange ) {
        QBrush b = p->brush();
        QColor c = p->backgroundColor();
        p->setBackgroundMode( TransparentMode );
        p->setBackgroundColor( green );
        fill = QBrush(g.base(), Dense4Pattern);
        p->setBackgroundColor( c );
        p->setBrush( b );
    } else if ( down )
        fill = g.brush( QColorGroup::Button );
    else
        fill = g.brush( enabled ? QColorGroup::Base : QColorGroup::Background );

    drawButton( p, x, y, w, h, g, FALSE, &fill );

    if ( s != QButton::Off ) {
        QPointArray a( 7*2 );
        int i, xx, yy;
        xx = x+3;
        yy = y+5;
        for ( i=0; i<3; i++ ) {
            a.setPoint( 2*i,   xx, yy );
            a.setPoint( 2*i+1, xx, yy+2 );
            xx++; yy++;
        }
        yy -= 2;
        for ( i=3; i<7; i++ ) {
            a.setPoint( 2*i,   xx, yy );
            a.setPoint( 2*i+1, xx, yy+2 );
            xx++; yy--;
        }
        if ( s == QButton::NoChange ) {
            p->setPen( g.dark() );
        } else {
            p->setPen( g.text() );
        }
        p->drawLineSegments( a );
    }
}

/*!
  \reimp
*/
void QInterlaceStyle::drawIndicatorMask( QPainter *p, int x, int y, int w, int h, int )
{
    drawButtonMask( p, x, y, w, h );
}

/*!
  \reimp
*/
QSize QInterlaceStyle::exclusiveIndicatorSize() const
{
    return QSize(13,13);
}

/*!
  \reimp
*/
void QInterlaceStyle::drawExclusiveIndicator( QPainter *p, int x, int y, int w, int h, const QColorGroup &g, bool on, bool down, bool enabled )
{
    p->fillRect( x, y, w, h, g.brush( QColorGroup::Background ) );
    p->setBrush( g.dark() );
    p->setPen( QPen( NoPen ) );
    p->drawEllipse( x, y, w, h );

    x += 2;
    y += 2;
    w -= 4;
    h -= 4;
    QColor fillColor = ( down || !enabled ) ? g.button() : g.base();
    p->setBrush( fillColor );
    p->drawEllipse( x, y, w, h );

    if ( on ) {
        p->setBrush( g.text() );
        p->drawEllipse( x+2, y+2, w-4, h-4 );
    }
}

/*!
  \reimp
*/
void QInterlaceStyle::drawExclusiveIndicatorMask( QPainter *p, int x, int y, int w, int h, bool )
{
    p->setBrush( color1 );
    p->setPen( QPen( NoPen ) );
    p->drawEllipse( x, y, w, h );
}

static int get_combo_extra_width( int h, int *return_awh=0 )
{
    int awh;
    if ( h < 8 ) {
        awh = 6;
    } else if ( h < 14 ) {
        awh = h - 2;
    } else {
        awh = h/2;
    }
    if ( return_awh )
        *return_awh = awh;
    return awh*3/2;
}

/*!
  \reimp
*/
QRect QInterlaceStyle::comboButtonRect ( int x, int y, int w, int h )
{
    QRect r = buttonRect( x, y, w, h );
    int ew = get_combo_extra_width( r.height() );
    return QRect(r.x(), r.y(), r.width()-ew, r.height());
}

static void get_combo_parameters( const QRect &r,
    int &ew, int &awh, int &ax,
    int &ay, int &sh, int &dh,
    int &sy )
{
    ew = get_combo_extra_width( r.height(), &awh );

    sh = (awh+3)/4;
    if ( sh < 3 )
    sh = 3;
    dh = sh/2 + 1;

    ay = r.y() + (r.height()-awh-sh-dh)/2;
    if ( ay < 0 ) {
        //panic mode
        ay = 0;
        sy = r.height();
    } else {
        sy = ay+awh+dh;
    }
    ax = r.x() + r.width() - ew +(ew-awh)/2;
}

/*!
  \reimp
*/
void QInterlaceStyle::drawComboButton( QPainter *p, int x, int y, int w, int h,
                                const QColorGroup &g,
                                bool /* sunken */,
                                bool /*editable*/,
                                bool /*enabled */,
                                const QBrush *fb )
{
    QBrush fill = fb ? *fb : g.brush( QColorGroup::Button );

    int awh, ax, ay, sh, sy, dh, ew;
    get_combo_parameters( buttonRect(x,y,w,h), ew, awh, ax, ay, sh, dh, sy );

    drawButton( p, x, y, w, h, g, FALSE, &fill );

    qDrawArrow( p, DownArrow, MotifStyle, FALSE, ax, ay, awh, awh, g, TRUE );

    p->setPen( g.dark() );
    p->drawRect( ax+1, sy+1, awh-1, sh-1 );
}

/*!
  \reimp
*/
void QInterlaceStyle::drawPushButtonLabel( QPushButton* btn, QPainter *p)
{
    QRect r = btn->rect();
    int x, y, w, h;
    r.rect( &x, &y, &w, &h );

    int x1, y1, x2, y2;
    btn->rect().coords( &x1, &y1, &x2, &y2 );   // get coordinates
    int dx = 0;
    int dy = 0;
    if ( btn->isMenuButton() )
        dx = (y2-y1) / 3;
    if ( btn->isOn() || btn->isDown() ) {
//      dx--;
//      dy--;
    }
    if ( dx || dy )
        p->translate( dx, dy );

    x += 2;  y += 2;  w -= 4;  h -= 4;
    QColorGroup g = btn->colorGroup();
    const QColor *col = &btn->colorGroup().buttonText();
    if ( (btn->isDown() || btn->isOn()) )
        col = &btn->colorGroup().brightText();
    else if ( !btn->isEnabled() )
        col = &btn->colorGroup().dark();
    drawItem( p, x, y, w, h,
              AlignCenter|ShowPrefix,
              g, btn->isEnabled(),
              btn->pixmap(), btn->text(), -1, col );

    if ( dx || dy )
        p->translate( -dx, -dy );
}

#define HORIZONTAL      (sb->orientation() == QScrollBar::Horizontal)
#define VERTICAL        !HORIZONTAL
#define MOTIF_BORDER    defaultFrameWidth()
#define SLIDER_MIN      9 // ### motif says 6 but that's too small


/*! \reimp */

void QInterlaceStyle::scrollBarMetrics( const QScrollBar* sb, int &sliderMin, int &sliderMax, int &sliderLength, int &buttonDim )
{
    int maxLength;
    int b = MOTIF_BORDER;
    int length = HORIZONTAL ? sb->width()  : sb->height();
    int extent = HORIZONTAL ? sb->height() : sb->width();

    if ( length > ( extent - b*2 - 1 )*2 + b*2  )
        buttonDim = extent - b*2;
    else
        buttonDim = ( length - b*2 )/2 - 1;

    sliderMin = b + buttonDim;
    maxLength  = length - b*2 - buttonDim*2;

    if ( sb->maxValue() == sb->minValue() ) {
        sliderLength = maxLength;
    } else {
        uint range = sb->maxValue()-sb->minValue();
        sliderLength = (sb->pageStep()*maxLength)/
                        (range + sb->pageStep());
        if ( sliderLength < SLIDER_MIN || range > INT_MAX/2 )
            sliderLength = SLIDER_MIN;
        if ( sliderLength > maxLength )
            sliderLength = maxLength;
    }
    sliderMax = sliderMin + maxLength - sliderLength;

}


/*! \reimp */

void QInterlaceStyle::drawScrollBarControls( QPainter* p, const QScrollBar* sb,
                                         int sliderStart, uint controls,
                                         uint activeControl )
{
#define ADD_LINE_ACTIVE ( activeControl == AddLine )
#define SUB_LINE_ACTIVE ( activeControl == SubLine )
    QColorGroup g  = sb->colorGroup();

    int sliderMin, sliderMax, sliderLength, buttonDim;
    scrollBarMetrics( sb, sliderMin, sliderMax, sliderLength, buttonDim );

    QBrush fill = g.brush( QColorGroup::Mid );
    if (sb->backgroundPixmap() ){
        fill = QBrush( g.mid(), *sb->backgroundPixmap() );
    }

    if ( controls == (AddLine | SubLine | AddPage | SubPage | Slider | First | Last ) )
        drawPanel( p, 0, 0, sb->width(), sb->height(), g, FALSE, 2, &fill );

    if (sliderStart > sliderMax) { // sanity check
        sliderStart = sliderMax;
    }

    int b = MOTIF_BORDER;
    int dimB = buttonDim;
    QRect addB;
    QRect subB;
    QRect addPageR;
    QRect subPageR;
    QRect sliderR;
    int addX, addY, subX, subY;
    int length = HORIZONTAL ? sb->width()  : sb->height();
    int extent = HORIZONTAL ? sb->height() : sb->width();

    if ( HORIZONTAL ) {
        subY = addY = ( extent - dimB ) / 2;
        subX = b;
        addX = length - dimB - b;
    } else {
        subX = addX = ( extent - dimB ) / 2;
        subY = b;
        addY = length - dimB - b;
    }

    subB.setRect( subX,subY,dimB,dimB );
    addB.setRect( addX,addY,dimB,dimB );

    int sliderEnd = sliderStart + sliderLength;
    int sliderW = extent - b*2;
    if ( HORIZONTAL ) {
        subPageR.setRect( subB.right() + 1, b,
                          sliderStart - subB.right() , sliderW );
        addPageR.setRect( sliderEnd-1, b, addX - sliderEnd+1, sliderW );
        sliderR .setRect( sliderStart, b, sliderLength, sliderW );
    } else {
        subPageR.setRect( b, subB.bottom()+1, sliderW,
                          sliderStart - subB.bottom() );
        addPageR.setRect( b, sliderEnd-1, sliderW, addY - sliderEnd + 1);
        sliderR .setRect( b, sliderStart, sliderW, sliderLength );
    }

    if ( controls & AddLine )
        drawArrow( p, VERTICAL ? DownArrow : RightArrow,
                   ADD_LINE_ACTIVE, addB.x(), addB.y(),
                   addB.width(), addB.height(), g, TRUE );
    if ( controls & SubLine )
        drawArrow( p, VERTICAL ? UpArrow : LeftArrow,
                   SUB_LINE_ACTIVE, subB.x(), subB.y(),
                   subB.width(), subB.height(), g, TRUE );

    if ( controls & SubPage )
        p->fillRect( subPageR, fill );

    if ( controls & AddPage )
        p->fillRect( addPageR, fill );

    if ( controls & Slider ) {
        QPoint bo = p->brushOrigin();
        p->setBrushOrigin(sliderR.topLeft());
        if ( sliderR.isValid() )
            drawButton( p, sliderR.x(), sliderR.y(),
                          sliderR.width(), sliderR.height(), g,
                          FALSE, &g.brush( QColorGroup::Button ) );
        p->setBrushOrigin(bo);
    }

}

/*!
  \reimp
*/
void QInterlaceStyle::drawSlider ( QPainter * p, int x, int y, int w, int h, const QColorGroup & g, Orientation orient, bool, bool)
{
    p->fillRect( x, y, w, h, g.brush( QColorGroup::Background ) );
    drawButton( p, x, y, w, h, g, FALSE, &g.brush( QColorGroup::Button ) );
    if ( orient == Horizontal ) {
        QCOORD mid = x + w / 2;
        qDrawShadeLine( p, mid,  y , mid,  y + h - 2, g, TRUE, 1);
    } else {
        QCOORD mid = y +h / 2;
        qDrawShadeLine( p, x, mid,  x + w - 2, mid, g, TRUE, 1);
    }
}


/*!
  \reimp
*/
void QInterlaceStyle::drawSliderGroove ( QPainter * p, int x, int y, int w, int h, const QColorGroup & g, QCOORD , Orientation o)
{
    p->setBrush( g.brush( QColorGroup::Dark ) );
    p->setPen( NoPen );

    if ( o == Horizontal )
        drawButton( p, x, y+h/2-3, w, 6, g, FALSE, &g.brush( QColorGroup::Mid ) );
    else
        drawButton( p, x+w/2-3, y, 6, h, g, FALSE, &g.brush( QColorGroup::Mid ) );
}


/*!
  \reimp
*/
int QInterlaceStyle::splitterWidth() const
{
    return QMAX( 12, QApplication::globalStrut().width() );
}

/*!
  \reimp
*/
void QInterlaceStyle::drawSplitter( QPainter *p, int x, int y, int w, int h,
  const QColorGroup &g, Orientation orient)
{
    const int motifOffset = 12;
    int sw = splitterWidth();
    if ( orient == Horizontal ) {
            QCOORD xPos = x + w/2;
            QCOORD kPos = motifOffset;
            QCOORD kSize = sw - 4;

            qDrawShadeLine( p, xPos, kPos + kSize - 1 ,
                            xPos, h, g );
            drawPanel( p, xPos-sw/2+2, kPos,
                             kSize, kSize, g, FALSE, 2,
                             &g.brush( QColorGroup::Button ));
            qDrawShadeLine( p, xPos, 0, xPos, kPos, g );
        } else {
            QCOORD yPos = y + h/2;
            QCOORD kPos = w - motifOffset - sw;
            QCOORD kSize = sw - 4;

            qDrawShadeLine( p, 0, yPos, kPos, yPos, g );
            drawPanel( p, kPos, yPos-sw/2+2,
                             kSize, kSize, g, FALSE, 2,
                             &g.brush( QColorGroup::Button ));
            qDrawShadeLine( p, kPos + kSize -1, yPos,
                            w, yPos, g );
        }

}

/*!
  \reimp
*/
void QInterlaceStyle::drawPanel( QPainter *p, int x, int y, int w, int h,
                            const QColorGroup &g, bool /*sunken*/,
                            int lineWidth, const QBrush *fill )
{
    if ( lineWidth < 2 )
        lineWidth = 2;

    p->setBrush( g.brush( QColorGroup::Dark ) );
    p->setPen( NoPen );

    p->drawRect( x, y, w, lineWidth );
    p->drawRect( x, y+h-lineWidth, w, lineWidth );
    p->drawRect( x, y, lineWidth, h );
    p->drawRect( x+w-lineWidth, y, lineWidth, h );

    if ( fill ) {
        x += lineWidth;
        y += lineWidth;
        w -= 2*lineWidth;
        h -= 2*lineWidth;
        p->setBrush( *fill );
        p->setPen( NoPen );
        p->drawRect( x, y, w, h );
    }
}

#endif // QT_NO_STYLE_INTERLACE

#endif