flat.cpp

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/**********************************************************************
** Copyright (C) 2000-2002 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
**
** 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.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#include <qtopia/qpeapplication.h>
#include <qpushbutton.h>
#include <qtoolbutton.h>
#include <qpainter.h>
#include <qfontmetrics.h>
#include <qpalette.h>
#include <qdrawutil.h>
#include <qscrollbar.h>
#include <qbutton.h>
#include <qframe.h>
#include <qtabbar.h>
#include <qspinbox.h>
#include <qlineedit.h>
#include <qmap.h>

#define INCLUDE_MENUITEM_DEF
#include <qmenudata.h>
#include <qpopupmenu.h>

#include "flat.h"

#define QCOORDARRLEN(x) sizeof(x)/(sizeof(QCOORD)*2)

class SpinBoxHack : public QSpinBox
{
public:
    void setFlatButtons( bool f ) {
        upButton()->setFlat( f );
        downButton()->setFlat( f );
    }
};

class FlatStylePrivate : public QObject
{
    Q_OBJECT
public:
    FlatStylePrivate() : QObject() {}

    bool eventFilter( QObject *o, QEvent *e ) {
        if ( e->type() == QEvent::ParentPaletteChange ) {
            if ( o->inherits( "QMenuBar" ) ) {
                QWidget *w = (QWidget *)o;
                if ( w->parentWidget() ) {
                    QPalette p = w->parentWidget()->palette();
                    QColorGroup a = p.active();
                    a.setColor( QColorGroup::Light, a.foreground() );
                    a.setColor( QColorGroup::Dark, a.foreground() );
                    p.setActive( a );
                    p.setInactive( a );
                    w->setPalette( p );
                }
            } else if ( o->inherits( "QHeader" ) ) {
                QWidget *w = (QWidget *)o;
                if ( w->parentWidget() ) {
                    QPalette p = w->parentWidget()->palette();
                    QColorGroup a = p.active();
                    a.setColor( QColorGroup::Light, a.button() );
                    p.setActive( a );
                    p.setInactive( a );
                    w->setPalette( p );
                }
            }
        }
        return FALSE;
    }

    QMap<QFrame *,int> frameStyles;
};

FlatStyle::FlatStyle() : revItem(FALSE), fillBtnBorder(FALSE)
{
    setButtonMargin(3);
    setScrollBarExtent(13,13);
    setButtonDefaultIndicatorWidth(0);
    d = new FlatStylePrivate;
}

FlatStyle::~FlatStyle()
{
    delete d;
}

int FlatStyle::buttonMargin() const
{
    return 3;
}

QSize FlatStyle::scrollBarExtent() const
{
    return QSize(13,13);
}

void FlatStyle::polish ( QPalette & )
{
}

void FlatStyle::polish( QWidget *w )
{
    if ( w->inherits( "QFrame" ) ) {
        QFrame *f = (QFrame *)w;
        if ( f->frameShape() == QFrame::HLine || f->frameShape() == QFrame::VLine )
            f->setFrameShadow( QFrame::Plain );
        else if ( f->frameShape() != QFrame::NoFrame )
            f->setFrameShape( QFrame::StyledPanel );
        f->setLineWidth( 1 );
    }
    if ( w->inherits( "QSpinBox" ) )
        ((SpinBoxHack*)w)->setFlatButtons( TRUE );
    if ( w->inherits( "QMenuBar" ) ) {
        // make selected item look flat
        QPalette p = w->palette();
        QColorGroup a = p.active();
        a.setColor( QColorGroup::Light, a.foreground() );
        a.setColor( QColorGroup::Dark, a.foreground() );
        p.setActive( a );
        p.setInactive( a );
        w->setPalette( p );
        w->installEventFilter( d );
    } else if ( w->inherits( "QHeader" ) ) {
        // make headers look flat
        QPalette p = w->palette();
        QColorGroup a = p.active();
        a.setColor( QColorGroup::Light, a.button() );
        p.setActive( a );
        p.setInactive( a );
        w->setPalette( p );
        w->installEventFilter( d );
    }
}

void FlatStyle::unPolish( QWidget *w )
{
    if ( w->inherits("QFrame") ) {
        QFrame *f = (QFrame *)w;
        if ( f->frameShape() == QFrame::HLine || f->frameShape() == QFrame::VLine ) {
            f->setFrameShadow( QFrame::Sunken );
        } else if ( f->frameShape() != QFrame::NoFrame ) {
            f->setFrameShape( QFrame::StyledPanel );
            f->setLineWidth( 2 );
        }
    }
    if ( w->inherits("QSpinBox") )
        ((SpinBoxHack*)w)->setFlatButtons( FALSE );
    if ( w->inherits("QMenuBar") || w->inherits("QHeader") ) {
        w->unsetPalette();
        w->removeEventFilter( d );
    }
}

int FlatStyle::defaultFrameWidth() const
{
    return 2;
}

void FlatStyle::drawItem( QPainter *p, int x, int y, int w, int h,
                    int flags, const QColorGroup &g, bool enabled,
                    const QPixmap *pixmap, const QString& text, int len,
                    const QColor* penColor )
{
    QColor pc( penColor ? *penColor : g.foreground() );
    QColorGroup cg( g );
    if ( !enabled )
        cg.setColor( QColorGroup::Light, cg.background() );
    if ( revItem ) {
        pc = cg.button();
        revItem = FALSE;
    }
    QWindowsStyle::drawItem( p, x, y, w, h, flags, cg, enabled, pixmap, text, len, &pc );
}

void FlatStyle::drawPanel ( QPainter * p, int x, int y, int w, int h,
                            const QColorGroup &g, bool /*sunken*/, int lineWidth, const QBrush * fill )
{
    if ( fill )
        p->setBrush( *fill );
    p->setPen( QPen(g.foreground(), lineWidth) );
    p->drawRect( x, y, w, h );
}

void FlatStyle::drawButton( QPainter *p, int x, int y, int w, int h,
                                const QColorGroup &cg, bool /*sunken*/, const QBrush* fill )
{
    QPen oldPen = p->pen();

    int x2 = x+w-1;
    int y2 = y+h-1;

    if ( fillBtnBorder && btnBg != cg.color(QColorGroup::Button) ) {
        p->setPen( btnBg );
        p->drawLine( x, y, x2, y );
        p->drawLine( x, y2, x2, y2 );
        p->drawLine( x, y+1, x, y2-1 );
        p->drawLine( x2, y+1, x2, y2-1 );
        p->fillRect( x+1, y+1, 3, 3, btnBg );
        p->fillRect( x+1, y2-3, 3, 3, btnBg );
        p->fillRect( x2-3, y2-3, 3, 3, btnBg );
        p->fillRect( x2-3, y+1, 3, 3, btnBg );
        p->fillRect( x+2, y+2, w-4, h-4, fill?(*fill):cg.brush(QColorGroup::Button) );
    } else {
        p->fillRect( x+1, y+1, w-2, h-2, fill?(*fill):cg.brush(QColorGroup::Button) );
    }

    if ( h >= 10 ) {
        x++; y++;
        x2--; y2--;
        w -= 2; h -= 2;
    }

    p->setPen( cg.foreground() );

    if ( h < 10 ) {
        p->setBrush( NoBrush );
        p->drawRect( x, y, w, h );
    } else {
        p->drawLine( x+3, y, x2-3, y );
        p->drawLine( x+3, y2, x2-3, y2 );
        p->drawLine( x, y+3, x, y2-3 );
        p->drawLine( x2, y+3, x2, y2-3 );

        p->drawLine( x+1, y+1, x+2, y+1 );
        p->drawPoint( x+1, y+2 );
        p->drawLine( x2-2, y+1, x2-1, y+1 );
        p->drawPoint( x2-1, y+2 );

        p->drawLine( x+1, y2-1, x+2, y2-1 );
        p->drawPoint( x+1, y2-2 );
        p->drawLine( x2-2, y2-1, x2-1, y2-1 );
        p->drawPoint( x2-1, y2-2 );
    }

    p->setPen( oldPen );
}

void FlatStyle::drawButtonMask ( QPainter * p, int x, int y, int w, int h )
{
    x++; y++;
    x-=2; y-=2;
    p->fillRect( x, y, w, h, color1 );
}

void FlatStyle::drawBevelButton( QPainter *p, int x, int y, int w, int h,
                                const QColorGroup &g, bool /*sunken*/, const QBrush* fill )
{
    p->fillRect( x+1, y+1, w-2, h-2, fill?(*fill):g.brush(QColorGroup::Button) );
    p->setPen( g.foreground() );
    p->setBrush( NoBrush );
    p->drawRect( x, y, w, h );
}

void FlatStyle::drawToolButton( QPainter *p, int x, int y, int w, int h,
                                const QColorGroup &g, bool sunken, const QBrush* fill )
{
    if ( p->device()->devType() == QInternal::Widget ) {
        QWidget *w = (QWidget *)p->device();
        if ( w->isA("QToolButton") ) {
            QToolButton *btn = (QToolButton *)w;
            if ( btn->parentWidget() ) {
                btnBg = btn->parentWidget()->backgroundColor();
                fillBtnBorder = TRUE;
            }
        }
    }
    QBrush fb( fill ? *fill : g.button() );
    if ( sunken && fb == g.brush( QColorGroup::Button ) ) {
        fb = g.buttonText();
        revItem = TRUE; // ugh
    }
    drawButton( p, x, y, w, h, g, sunken, &fb );
    fillBtnBorder = FALSE;
}

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

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

    p->setPen( g.foreground() );
    p->setBrush( QBrush(g.button(),NoBrush) );

//    int diw = buttonDefaultIndicatorWidth();
    /*
    if ( btn->isDefault() || btn->autoDefault() ) {
        if ( btn->isDefault() ) {
            p->setPen( g.shadow() );
            p->drawRect( x1, y1, x2-x1+1, y2-y1+1 );
        }
        x1 += diw;
        y1 += diw;
        x2 -= diw;
        y2 -= diw;
    }
    */

    if ( btn->parentWidget() ) {
        btnBg = btn->parentWidget()->backgroundColor();
        fillBtnBorder = TRUE;
    }

    bool clearButton = TRUE;
    if ( btn->isDown() ) {
        drawButton( p, x1, y1, x2-x1+1, y2-y1+1, g, TRUE,
                &g.brush( QColorGroup::Text ) );
    } else {
        if ( btn->isToggleButton() && btn->isOn() && btn->isEnabled() ) {
            QBrush fill(g.light(), Dense4Pattern );
            drawButton( p, x1, y1, x2-x1+1, y2-y1+1, g, TRUE, &fill );
            clearButton = FALSE;
        } else {
            if ( !btn->isFlat() )
                drawButton( p, x1, y1, x2-x1+1, y2-y1+1, g, btn->isOn(),
                        &g.brush( QColorGroup::Button ) );
        }
    }
    /*
    if ( clearButton ) {
        if (btn->isDown())
            p->setBrushOrigin(p->brushOrigin() + QPoint(1,1));
        p->fillRect( x1+2, y1+2, x2-x1-3, y2-y1-3,
                     g.brush( QColorGroup::Button ) );
        if (btn->isDown())
            p->setBrushOrigin(p->brushOrigin() - QPoint(1,1));
    }
    */

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

void FlatStyle::drawPushButtonLabel( QPushButton *btn, QPainter *p )
{
    QRect r = pushButtonContentsRect( btn );
    int x, y, w, h;
    r.rect( &x, &y, &w, &h );
    QColorGroup cg = btn->colorGroup();
    if ( btn->isToggleButton() && btn->isOn() && btn->isEnabled() && !btn->isDown() )
        cg.setColor( QColorGroup::ButtonText, btn->colorGroup().text() );
    else if ( btn->isDown() || btn->isOn() )
        cg.setColor( QColorGroup::ButtonText, btn->colorGroup().button() );
    if ( btn->isMenuButton() ) {
        int dx = menuButtonIndicatorWidth( btn->height() );
        drawArrow( p, DownArrow, FALSE,
                x+w-dx, y+2, dx-4, h-4,
                cg,
                btn->isEnabled() );
        w -= dx;
    }

    if ( btn->iconSet() && !btn->iconSet()->isNull() ) {
        QIconSet::Mode mode = btn->isEnabled()
            ? QIconSet::Normal : QIconSet::Disabled;
        if ( mode == QIconSet::Normal && btn->hasFocus() )
            mode = QIconSet::Active;
        QPixmap pixmap = btn->iconSet()->pixmap( QIconSet::Automatic, mode );
        int pixw = pixmap.width();
        int pixh = pixmap.height();
        p->drawPixmap( x+2, y+h/2-pixh/2, pixmap );
        x += pixw + 4;
        w -= pixw + 4;
    }
    drawItem( p, x, y, w, h,
            AlignCenter | ShowPrefix,
            cg, btn->isEnabled(),
            btn->pixmap(), btn->text(), -1, &cg.buttonText() );

}

QRect FlatStyle::comboButtonRect( int x, int y, int w, int h)
{
    return QRect(x+2, y+2, w-4-13, h-4);
}


QRect FlatStyle::comboButtonFocusRect( int x, int y, int w, int h)
{
    return QRect(x+2, y+2, w-4-14, h-4);
}

void FlatStyle::drawComboButton( QPainter *p, int x, int y, int w, int h,
                                     const QColorGroup &g, bool sunken,
                                     bool /*editable*/,
                                     bool enabled,
                                     const QBrush * /*fill*/ )
{
    x++; y++;
    w-=2; h-=2;
    p->setPen( g.foreground() );
    p->setBrush( QBrush(NoBrush) );
    p->drawRect( x, y, w, h );
    p->setPen( g.background() );
    p->drawRect( x+1, y+1, w-14, h-2 );
    p->fillRect( x+2, y+2, w-16, h-4, g.brush( QColorGroup::Base ) );
    QColorGroup cg( g );
    if ( sunken ) {
        cg.setColor( QColorGroup::ButtonText, g.button() );
        cg.setColor( QColorGroup::Button, g.buttonText() );
    }
    drawArrow( p, QStyle::DownArrow, FALSE,
               x+w-13, y+1, 12, h-2, cg, enabled,
               &cg.brush( QColorGroup::Button ) );

}


void FlatStyle::drawExclusiveIndicator ( QPainter * p, int x, int y, int w,
        int h, const QColorGroup &cg, bool on, bool down, bool enabled )
{
    static const QCOORD pts1[] = {              // dark lines
        1,9, 1,8, 0,7, 0,4, 1,3, 1,2, 2,1, 3,1, 4,0, 7,0, 8,1, 9,1 };
    static const QCOORD pts4[] = {              // white lines
        2,10, 3,10, 4,11, 7,11, 8,10, 9,10, 10,9, 10,8, 11,7,
        11,4, 10,3, 10,2 };
    static const QCOORD pts5[] = {              // inner fill
        4,2, 7,2, 9,4, 9,7, 7,9, 4,9, 2,7, 2,4 };

    p->eraseRect( x, y, w, h );
    QPointArray a( QCOORDARRLEN(pts1), pts4 );
    a.translate( x, y );
    p->setPen( cg.foreground() );
    p->drawPolyline( a );
    a.setPoints( QCOORDARRLEN(pts4), pts1 );
    a.translate( x, y );
    p->setPen( cg.foreground() );
    p->drawPolyline( a );
    a.setPoints( QCOORDARRLEN(pts5), pts5 );
    a.translate( x, y );
    QColor fillColor = ( down || !enabled ) ? cg.button() : cg.base();
    p->setPen( fillColor );
    p->setBrush( fillColor  ) ;
    p->drawPolygon( a );
    if ( on ) {
        p->setPen( NoPen );
        p->setBrush( cg.text() );
        p->drawRect( x+5, y+4, 2, 4 );
        p->drawRect( x+4, y+5, 4, 2 );
    }
}

void FlatStyle::drawIndicator ( QPainter * p, int x, int y, int w, int h,
        const QColorGroup &cg, int state, bool down, bool enabled )
{
    QColorGroup mycg( cg );
    mycg.setBrush( QColorGroup::Button, QBrush() );
    QBrush fill;
    drawButton( p, x, y, w, h, mycg, TRUE, 0 );
    if ( down )
        fill = cg.brush( QColorGroup::Button );
    else
        fill = cg.brush( enabled ? QColorGroup::Base : QColorGroup::Background );
    mycg.setBrush( QColorGroup::Button, fill );
    p->fillRect( x+1, y+1, w-2, h-2, fill );
    if ( state != 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 ( state == QButton::NoChange ) {
            p->setPen( mycg.dark() );
        } else {
            p->setPen( mycg.text() );
        }
        p->drawLineSegments( a );
    }
}

#define HORIZONTAL      (sb->orientation() == QScrollBar::Horizontal)
#define VERTICAL        !HORIZONTAL
#define MOTIF_BORDER    2
#define SLIDER_MIN      9 // ### motif says 6 but that's too small

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

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

    sliderMin = 0;
    maxLength  = length - buttonDim*2 + 2;

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

    sliderMax = sliderMin + maxLength - sliderLength;
}

QStyle::ScrollControl FlatStyle::scrollBarPointOver( const QScrollBar* sb, int sliderStart, const QPoint& p )
{
    if ( !sb->rect().contains( p ) )
        return NoScroll;
    int sliderMin, sliderMax, sliderLength, buttonDim, pos;
    scrollBarMetrics( sb, sliderMin, sliderMax, sliderLength, buttonDim );

    if (sb->orientation() == QScrollBar::Horizontal)
        pos = p.x();
    else
        pos = p.y();

    if (pos < sliderStart)
        return SubPage;
    if (pos < sliderStart + sliderLength)
        return Slider;
    if (pos < sliderMax + sliderLength)
        return AddPage;
    if (pos < sliderMax + sliderLength + buttonDim)
        return SubLine;
    return AddLine;
}

void FlatStyle::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 );

    if ( controls == (AddLine | SubLine | AddPage | SubPage | Slider | First | Last ) ) {
        p->setPen( g.foreground() );
        p->setBrush( g.brush( QColorGroup::Mid ) );
        p->drawRect( 0, 0, sb->width(), sb->height() );
    }

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

    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 = length - dimB - dimB + 1;
        addX = length - dimB;
    } else {
        subX = addX = ( extent - dimB ) / 2;
        subY = length - dimB - dimB + 1;
        addY = length - dimB;
    }

    int sliderEnd = sliderStart + sliderLength;
    int sliderW = extent;
    if ( HORIZONTAL ) {
        subB.setRect( subX,subY,dimB,dimB );
        addB.setRect( addX,addY,dimB,dimB );
        subPageR.setRect( 0, 0, sliderStart+1, sliderW );
        addPageR.setRect( sliderEnd-1, 0, subX - sliderEnd+2, sliderW );
        sliderR .setRect( sliderStart, 0, sliderLength, sliderW );

    } else {
        subB.setRect( subX,subY,dimB,dimB );
        addB.setRect( addX,addY,dimB,dimB );
        subPageR.setRect( 0, 0, sliderW, sliderStart+1 );
        addPageR.setRect( 0, sliderEnd-1, sliderW, subY - sliderEnd+2 );
        sliderR .setRect( 0, sliderStart, sliderW, sliderLength );
    }

    bool maxedOut = (sb->maxValue() == sb->minValue());
    p->setPen( g.foreground() );
    if ( controls & AddLine ) {
        p->setBrush( ADD_LINE_ACTIVE ? g.foreground() : g.button() );
        p->drawRect( addB.x(), addB.y(), addB.width(), addB.height() );
        p->setPen( ADD_LINE_ACTIVE ? g.button() : g.foreground() );
        QColorGroup cg( g );
        if ( maxedOut )
            cg.setColor( QColorGroup::ButtonText, g.mid() );
        else if ( ADD_LINE_ACTIVE )
            cg.setColor( QColorGroup::ButtonText, g.button() );
        int xo = VERTICAL ? 1 : 0;
        drawArrow( p, VERTICAL ? DownArrow : RightArrow, FALSE,
                   addB.x()+2+xo, addB.y()+2, addB.width()-4-xo, addB.height()-4,
                   cg, TRUE, &p->brush() );
    }
    if ( controls & SubLine ) {
        p->setBrush( SUB_LINE_ACTIVE ? g.foreground() : g.button() );
        p->drawRect( subB.x(), subB.y(), subB.width(), subB.height() );
        p->setPen( SUB_LINE_ACTIVE ? g.button() : g.foreground() );
        QColorGroup cg( g );
        if ( maxedOut )
            cg.setColor( QColorGroup::ButtonText, g.mid() );
        else if ( SUB_LINE_ACTIVE )
            cg.setColor( QColorGroup::ButtonText, g.button() );
        int xo = VERTICAL ? 1 : 0;
        drawArrow( p, VERTICAL ? UpArrow : LeftArrow, FALSE,
                   subB.x()+2+xo, subB.y()+2, subB.width()-4-xo, subB.height()-4,
                   cg, TRUE, &p->brush() );
    }


    p->setPen( g.foreground() );
    p->setBrush( g.brush( QColorGroup::Mid ) );
    if ( controls & SubPage )
        p->drawRect( subPageR.x(), subPageR.y(), subPageR.width(), subPageR.height() );
    if ( controls & AddPage && addPageR.y() < addPageR.bottom() &&
         addPageR.x() < addPageR.right() )
        p->drawRect( addPageR.x(), addPageR.y(), addPageR.width(), addPageR.height() );
    if ( controls & Slider ) {
        QPoint bo = p->brushOrigin();
        p->setBrushOrigin(sliderR.topLeft());
        p->setPen( g.foreground() );
        p->setBrush( g.button() );
        p->drawRect( sliderR.x(), sliderR.y(), sliderR.width(), sliderR.height() );
        p->setBrushOrigin(bo);
        QColorGroup cg( g );
        if ( maxedOut )
            cg.setColor( QColorGroup::ButtonText, g.mid() );
        drawRiffles( p, sliderR.x(), sliderR.y(),
                     sliderR.width(), sliderR.height(), cg, HORIZONTAL );
    }

    // ### perhaps this should not be able to accept focus if maxedOut?
    if ( sb->hasFocus() && (controls & Slider) )
        p->drawWinFocusRect( sliderR.x()+2, sliderR.y()+2,
                             sliderR.width()-5, sliderR.height()-5,
                             sb->backgroundColor() );

}

void FlatStyle::drawRiffles( QPainter* p,  int x, int y, int w, int h,
                      const QColorGroup &g, bool horizontal )
{
    if (!horizontal) {
        if (h > 20) {
            y += (h-20)/2 ;
            h = 20;
        }
        if (h > 12) {
            int n = 3;
            int my = y+h/2-2;
            int i ;
            p->setPen(g.buttonText());
            for (i=0; i<n; i++) {
                p->drawLine(x+4, my+3*i, x+w-5, my+3*i);
            }
        }
    } else {
        if (w > 20) {
            x += (w-20)/2 ;
            w = 20;
        }
        if (w > 12) {
            int n = 3;
            int mx = x+w/2-4;
            int i ;
            p->setPen(g.buttonText());
            for (i=0; i<n; i++) {
                p->drawLine(mx+3*i, y+4, mx + 3*i, y+h-5);
            }
        }
    }
}

int FlatStyle::sliderLength() const
{
    return 12;
}

void FlatStyle::drawSlider( QPainter *p, int x, int y, int w, int h,
        const QColorGroup &g, Orientation o, bool tickAbove, bool tickBelow )
{
    int a = tickAbove ? 3 : 0;
    int b = tickBelow ? 3 : 0;

    p->setPen( g.foreground() );
    p->setBrush( g.button() );
    if ( o == Horizontal ) {
        p->drawRect( x, y+a, w, h-a-b );
        int xp = x + w/2;
        p->drawLine( xp-1, y+a+3, xp-1, y+h-b-4 );
        p->drawLine( xp, y+a+3, xp, y+h-b-4 );
    } else {
        p->drawRect( x+a, y, w-a-b, h );
        int yp = y + h/2;
        p->drawLine( x+a+3, yp-1, x+w-b-4, yp-1 );
        p->drawLine( x+a+3, yp, x+w-b-4, yp );
    }
}

void FlatStyle::drawSliderMask ( QPainter * p, int x, int y, int w, int h,
        Orientation o, bool tickAbove, bool tickBelow )
{
    int a = tickAbove ? 3 : 0;
    int b = tickBelow ? 3 : 0;
    if ( o == Horizontal )
        p->fillRect( x, y+a, w, h-a-b, color1 );
    else
        p->fillRect( x+a, y, w-a-b, h, color1 );
}

void FlatStyle::drawSliderGrooveMask( QPainter *p,
                                        int x, int y, int w, int h,
                                        const QColorGroup& , QCOORD c,
                                        Orientation orient )
{
    if ( orient == Horizontal )
        p->fillRect( x, y + c - 2,  w, 4, color1 );
    else
        p->fillRect( x + c - 2, y, 4, h, color1 );
}

void FlatStyle::drawSliderGroove( QPainter *p, int x, int y, int w, int h, const QColorGroup &g, QCOORD c, Orientation orient )
{
    if ( orient == Horizontal )
        p->fillRect( x, y + c - 2,  w, 4, g.foreground() );
    else
        p->fillRect( x + c - 2, y, 4, h, g.foreground() );
}

void FlatStyle::drawTab( QPainter *p, const QTabBar *tb, QTab *t, bool selected )
{
    QRect r( t->rect() );
    if ( tb->shape()  == QTabBar::RoundedAbove ) {
        p->setPen( tb->colorGroup().foreground() );
        p->drawLine( r.left(), r.bottom(), r.right(), r.bottom() );
        if ( r.left() == 0 )
            p->drawPoint( tb->rect().bottomLeft() );
        else
            p->drawLine( r.left(), r.bottom(), r.right(), r.bottom() );

        if ( selected ) {
            p->setPen( tb->colorGroup().background() );
            p->drawLine( r.left()+2, r.top()+1, r.right()-2, r.top()+1 );
            p->fillRect( QRect( r.left()+1, r.top()+2, r.width()-2, r.height()-2),
                         tb->colorGroup().brush( QColorGroup::Background ));
        } else {
            r.setRect( r.left() + 2, r.top() + 2,
                       r.width() - 4, r.height() - 2 );
            p->setPen( tb->colorGroup().button() );
            p->drawLine( r.left()+2, r.top()+1, r.right()-2, r.top()+1 );
            p->fillRect( QRect( r.left()+1, r.top()+2, r.width()-2, r.height()-3),
                         tb->colorGroup().brush( QColorGroup::Button ));
        }

        p->setPen( tb->colorGroup().foreground() );
        p->drawLine( r.left(), r.bottom()-1, r.left(), r.top() + 2 );
        p->drawPoint( r.left()+1, r.top() + 1 );
        p->drawLine( r.left()+2, r.top(),
                     r.right() - 2, r.top() );

        p->drawPoint( r.right() - 1, r.top() + 1 );
        p->drawLine( r.right(), r.top() + 2, r.right(), r.bottom() - 1);
    } else if ( tb->shape() == QTabBar::RoundedBelow ) {
        if ( selected ) {
            p->setPen( tb->colorGroup().background() );
            p->drawLine( r.left()+2, r.bottom()-1, r.right()-2, r.bottom()-1 );
            p->fillRect( QRect( r.left()+1, r.top(), r.width()-2, r.height()-2),
                         tb->palette().normal().brush( QColorGroup::Background ));
        } else {
            p->setPen( tb->colorGroup().foreground() );
            p->drawLine( r.left(), r.top(),
                         r.right(), r.top() );
            r.setRect( r.left() + 2, r.top(),
                       r.width() - 4, r.height() - 2 );
            p->setPen( tb->colorGroup().button() );
            p->drawLine( r.left()+2, r.bottom()-1, r.right()-2, r.bottom()-1 );
            p->fillRect( QRect( r.left()+1, r.top()+1, r.width()-2, r.height()-3),
                         tb->palette().normal().brush( QColorGroup::Button ));
        }

        p->setPen( tb->colorGroup().foreground() );
        p->drawLine( r.right(), r.top(),
                     r.right(), r.bottom() - 2 );
        p->drawPoint( r.right() - 1, r.bottom() - 1 );
        p->drawLine( r.right() - 2, r.bottom(),
                     r.left() + 2, r.bottom() );

        p->drawLine( r.left(), r.top()+1,
                     r.left(), r.bottom() - 2 );
        p->drawPoint( r.left() + 1, r.bottom() - 1 );
        if ( r.left() == 0 )
            p->drawPoint( tb->rect().topLeft() );

    } else {
        QCommonStyle::drawTab( p, tb, t, selected );
    }
}

static const int motifItemFrame         = 0;    // menu item frame width
static const int motifSepHeight         = 2;    // separator item height
static const int motifItemHMargin       = 1;    // menu item hor text margin
static const int motifItemVMargin       = 2;    // menu item ver text margin
static const int motifArrowHMargin      = 0;    // arrow horizontal margin
static const int motifTabSpacing        = 12;   // space between text and tab
static const int motifCheckMarkHMargin  = 1;    // horiz. margins of check mark
static const int windowsRightBorder     = 8;    // right border on windows
static const int windowsCheckMarkWidth  = 2;    // checkmarks width on windows

void FlatStyle::polishPopupMenu ( QPopupMenu *m )
{
    QWindowsStyle::polishPopupMenu( m );
    m->setLineWidth( 1 );
}

int FlatStyle::extraPopupMenuItemWidth( bool checkable, int maxpmw, QMenuItem* mi, const QFontMetrics& /*fm*/ )
{
#ifndef QT_NO_MENUDATA
    int w = 2*motifItemHMargin + 2*motifItemFrame; // a little bit of border can never harm

    if ( mi->isSeparator() )
        return 10; // arbitrary
    else if ( mi->pixmap() )
        w += mi->pixmap()->width();     // pixmap only

    if ( !mi->text().isNull() ) {
        if ( mi->text().find('\t') >= 0 )       // string contains tab
            w += motifTabSpacing;
    }

    if ( maxpmw ) { // we have iconsets
        w += maxpmw;
        w += 6; // add a little extra border around the iconset
    }

    if ( checkable && maxpmw < windowsCheckMarkWidth ) {
        w += windowsCheckMarkWidth - maxpmw; // space for the checkmarks
    }

    if ( maxpmw > 0 || checkable ) // we have a check-column ( iconsets or checkmarks)
        w += motifCheckMarkHMargin; // add space to separate the columns

    w += windowsRightBorder; // windows has a strange wide border on the right side

    return w;
#endif
}

int FlatStyle::popupMenuItemHeight( bool /*checkable*/, QMenuItem* mi, const QFontMetrics& fm )
{
#ifndef QT_NO_MENUDATA
    int h = 0;
    if ( mi->isSeparator() )                    // separator height
        h = motifSepHeight;
    else if ( mi->pixmap() )            // pixmap height
        h = mi->pixmap()->height() + 2*motifItemFrame;
    else                                        // text height
        h = fm.height() + 2*motifItemVMargin + 2*motifItemFrame - 1;

    if ( !mi->isSeparator() && mi->iconSet() != 0 ) {
        h = QMAX( h, mi->iconSet()->pixmap().height() + 2*motifItemFrame );
    }
    if ( mi->custom() )
        h = QMAX( h, mi->custom()->sizeHint().height() + 2*motifItemVMargin + 2*motifItemFrame ) - 1;
    return h;
#endif
}

void FlatStyle::drawPopupMenuItem( QPainter* p, bool checkable, int maxpmw, int tab, QMenuItem* mi,
                                       const QPalette& pal,
                                       bool act, bool enabled, int x, int y, int w, int h)
{
#ifndef QT_NO_MENUDATA
    const QColorGroup & g = pal.active();
    bool dis      = !enabled;
    QColorGroup itemg = dis ? pal.disabled() : pal.active();

    if ( checkable )
        maxpmw = QMAX( maxpmw, 8 ); // space for the checkmarks

    int checkcol          =     maxpmw;

    if ( mi && mi->isSeparator() ) {                    // draw separator
        p->setPen( g.dark() );
        p->drawLine( x, y, x+w, y );
        return;
    }

    QBrush fill = act? g.brush( QColorGroup::Highlight ) :
                            g.brush( QColorGroup::Button );
    p->fillRect( x, y, w, h, fill);

    if ( !mi )
        return;

    if ( mi->isChecked() ) {
        if ( act && !dis ) {
            qDrawShadePanel( p, x, y, checkcol, h,
                             g, TRUE, 1, &g.brush( QColorGroup::Button ) );
        } else {
            qDrawShadePanel( p, x, y, checkcol, h,
                             g, TRUE, 1, &g.brush( QColorGroup::Midlight ) );
        }
    } else if ( !act ) {
        p->fillRect(x, y, checkcol , h,
                    g.brush( QColorGroup::Button ));
    }

    if ( mi->iconSet() ) {              // draw iconset
        QIconSet::Mode mode = dis ? QIconSet::Disabled : QIconSet::Normal;
        if (act && !dis )
            mode = QIconSet::Active;
    QPixmap pixmap;
    if ( mode == QIconSet::Disabled )
        pixmap = mi->iconSet()->pixmap( QIconSet::Automatic, mode );
    else
        pixmap = mi->iconSet()->pixmap();
        int pixw = pixmap.width();
        int pixh = pixmap.height();
        if ( act && !dis ) {
            if ( !mi->isChecked() )
                qDrawShadePanel( p, x, y, checkcol, h, g, FALSE,  1, &g.brush( QColorGroup::Button ) );
        }
        QRect cr( x, y, checkcol, h );
        QRect pmr( 0, 0, pixw, pixh );
        pmr.moveCenter( cr.center() );
        p->setPen( itemg.text() );
        p->drawPixmap( pmr.topLeft(), pixmap );

        QBrush fill = act? g.brush( QColorGroup::Highlight ) :
                              g.brush( QColorGroup::Button );
        p->fillRect( x+checkcol + 1, y, w - checkcol - 1, h, fill);
    } else  if ( checkable ) {  // just "checking"...
        int mw = checkcol + motifItemFrame;
        int mh = h - 2*motifItemFrame;
        if ( mi->isChecked() ) {
            drawCheckMark( p, x + motifItemFrame + 2,
                           y+motifItemFrame, mw, mh, itemg, act, dis );
        }
    }

    p->setPen( act ? g.highlightedText() : g.buttonText() );

    QColor discol;
    if ( dis ) {
        discol = itemg.text();
        p->setPen( discol );
    }

    int xm = motifItemFrame + checkcol + motifItemHMargin;

    if ( mi->custom() ) {
        int m = motifItemVMargin;
        p->save();
        if ( dis && !act ) {
            p->setPen( g.light() );
            mi->custom()->paint( p, itemg, act, enabled,
                                 x+xm+1, y+m+1, w-xm-tab+1, h-2*m );
            p->setPen( discol );
        }
        mi->custom()->paint( p, itemg, act, enabled,
                             x+xm, y+m, w-xm-tab+1, h-2*m );
        p->restore();
    }
    QString s = mi->text();
    if ( !s.isNull() ) {                        // draw text
        int t = s.find( '\t' );
        int m = motifItemVMargin;
        const int text_flags = AlignVCenter|ShowPrefix | DontClip | SingleLine;
        if ( t >= 0 ) {                         // draw tab text
            if ( dis && !act ) {
                p->setPen( g.light() );
                p->drawText( x+w-tab-windowsRightBorder-motifItemHMargin-motifItemFrame+1,
                             y+m+1, tab, h-2*m, text_flags, s.mid( t+1 ));
                p->setPen( discol );
            }
            p->drawText( x+w-tab-windowsRightBorder-motifItemHMargin-motifItemFrame,
                         y+m, tab, h-2*m, text_flags, s.mid( t+1 ) );
        }
        if ( dis && !act )
            p->setPen( discol );
        p->drawText( x+xm, y+m, w-xm-tab+1, h-2*m, text_flags, s, t );
    } else if ( mi->pixmap() ) {                        // draw pixmap
        QPixmap *pixmap = mi->pixmap();
        if ( pixmap->depth() == 1 )
            p->setBackgroundMode( OpaqueMode );
        p->drawPixmap( x+xm, y+motifItemFrame, *pixmap );
        if ( pixmap->depth() == 1 )
            p->setBackgroundMode( TransparentMode );
    }
    if ( mi->popup() ) {                        // draw sub menu arrow
        int dim = (h-2*motifItemFrame) / 2;
        if ( act ) {
            if ( !dis )
                discol = white;
            QColorGroup g2( discol, g.highlight(),
                            white, white,
                            dis ? discol : white,
                            discol, white );
            drawArrow( p, RightArrow, FALSE,
                               x+w - motifArrowHMargin - motifItemFrame - dim,  y+h/2-dim/2,
                               dim, dim, g2, TRUE );
        } else {
            drawArrow( p, RightArrow,
                               FALSE,
                               x+w - motifArrowHMargin - motifItemFrame - dim,  y+h/2-dim/2,
                               dim, dim, g, mi->isEnabled() );
        }
    }
#endif
}

void FlatStyle::getButtonShift( int &x, int &y )
{
    x = 0; y = 0;
}

//===========================================================================

FlatStyleImpl::FlatStyleImpl()
    : flat(0)
{
}

FlatStyleImpl::~FlatStyleImpl()
{
    // We do not delete the style because Qt does that when a new style
    // is set.
}

QStyle *FlatStyleImpl::style()
{
    if ( !flat )
        flat = new FlatStyle();
    return flat;
}

QString FlatStyleImpl::name() const
{
    return qApp->translate("FlatStyle", "Flat", "Name of the style Flat");
}

QRESULT FlatStyleImpl::queryInterface( const QUuid &uuid, QUnknownInterface **iface )
{
    *iface = 0;
    if ( uuid == IID_QUnknown )
        *iface = this;
    else if ( uuid == IID_Style )
        *iface = this;
    else
        return QS_FALSE;

    (*iface)->addRef();
    return QS_OK;
}

Q_EXPORT_INTERFACE()
{
    Q_CREATE_INSTANCE( FlatStyleImpl )
}

#include "flat.moc"

---