flat.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

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::Small, 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

/*! \reimp */

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;
}

/*!\reimp
 */
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;
}

/*! \reimp */

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 );