qpestyle.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。

/**********************************************************************
** Copyright (C) 2000-2005 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
** 
** This program is free software; you can redistribute it and/or modify it
** under the terms of the GNU General Public License as published by the
** Free Software Foundation; either version 2 of the License, or (at your
** option) any later version.
** 
** A copy of the GNU GPL license version 2 is included in this package as 
** LICENSE.GPL.
**
** This program is distributed in the hope that it will be useful, but
** WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
** See the GNU General Public License for more details.
**
** In addition, as a special exception Trolltech gives permission to link
** the code of this program with Qtopia applications copyrighted, developed
** and distributed by Trolltech under the terms of the Qtopia Personal Use
** License Agreement. You must comply with the GNU General Public License
** in all respects for all of the code used other than the applications
** licensed under the Qtopia Personal Use License Agreement. If you modify
** this file, you may extend this exception to your version of the file,
** but you are not obligated to do so. If you do not wish to do so, delete
** this exception statement from your version.
** 
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact [e-mail] if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#include "qpestyle.h"
#include "qpeapplication.h"
#include <qpushbutton.h>

#include <qpainter.h>
#include <qimage.h>

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

#if QT_VERSION >= 0x030000

#include <qdrawutil.h>
#include <qcombobox.h>
#include <qtabbar.h>

/*!
  \class QPEStyle qpestyle.h
  \brief The QPEStyle class implements the default Qtopia widget style.

  \ingroup qtopiaemb
*/

// QDOC_SKIP_BEGIN

/*! */
QPEStyle::QPEStyle()
{
}

/*! */
QPEStyle::~QPEStyle()
{
}

/*! \a pe \a p \a r \a cg \a flags \a data */
void QPEStyle::drawPrimitive( PrimitiveElement pe, QPainter *p, const QRect &r,
			      const QColorGroup &cg, SFlags flags, const QStyleOption &data) const
{
    switch ( pe ) {
    case PE_ButtonTool:
	{
	    QColorGroup mycg = cg;
	    if ( flags & Style_On ) {
		QBrush fill( cg.mid(), Dense4Pattern );
		mycg.setBrush( QColorGroup::Button, fill );
	    }
	    drawPrimitive( PE_ButtonBevel, p, r, mycg, flags, data );
	    break;
	}
    case PE_ButtonCommand:
    case PE_ButtonDefault:
    case PE_ButtonBevel:
    case PE_HeaderSection:
	{
	    QPen oldPen = p->pen();
	    p->fillRect( r.x()+1, r.y()+1, r.width()-2, r.height()-2, cg.brush(QColorGroup::Button) );

	    int x2 = r.right();
	    int y2 = r.bottom();

	    if ( flags & (Style_Sunken | Style_Down | Style_On) )
		p->setPen( cg.dark() );
	    else
		p->setPen( cg.light() );
	    p->drawLine( r.x(), r.y()+1, r.x(), y2-1 );
	    p->drawLine( r.x()+1, r.y(), x2-1, r.y() );

	    if ( flags & (Style_Sunken | Style_Down | Style_On) )
		p->setPen( cg.light() );
	    else
		p->setPen( cg.dark() );
	    p->drawLine( x2, r.y()+1, x2, y2-1 );
	    p->drawLine( r.x()+1, y2, x2-1, y2 );
	    p->setPen( oldPen );
	    break;
	}
    case PE_FocusRect:
	break;
    case PE_Indicator:
	{
	    QColorGroup mycg( cg );
	    QBrush fill;
	    if ( flags & Style_Down )
		fill = cg.brush( QColorGroup::Button );
	    else
		fill = cg.brush( (flags&Style_Enabled) ? QColorGroup::Base : QColorGroup::Background );
	    mycg.setBrush( QColorGroup::Button, fill );
	    if ( flags&Style_Enabled )
		flags |= Style_Sunken;
	    drawPrimitive( PE_ButtonBevel, p, r, mycg, flags );
	    if ( flags & Style_On ) {
		QPointArray a( 7*2 );
		int i, xx, yy;
		xx = r.x()+3;
		yy = r.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 ( flags & Style_NoChange ) {
		    p->setPen( mycg.dark() );
		} else {
		    p->setPen( mycg.text() );
		}
		p->drawLineSegments( a );
	    }
	    break;
	}
    case PE_ExclusiveIndicator:
	{
	    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 };

	    int x, y, w, h;
	    r.rect( &x, &y, &w, &h );
	    p->eraseRect( x, y, w, h );
	    QPointArray a( QCOORDARRLEN(pts1), pts1 );
	    a.translate( x, y );
	    p->setPen( cg.dark() );
	    p->drawPolyline( a );
	    a.setPoints( QCOORDARRLEN(pts4), pts4 );
	    a.translate( x, y );
	    p->setPen( cg.light() );
	    p->drawPolyline( a );
	    a.setPoints( QCOORDARRLEN(pts5), pts5 );
	    a.translate( x, y );
	    QColor fillColor = ( flags&Style_Down || !(flags&Style_Enabled) ) ? cg.button() : cg.base();
	    p->setPen( fillColor );
	    p->setBrush( fillColor  ) ;
	    p->drawPolygon( a );
	    if ( flags&Style_On ) {
		p->setPen( NoPen );
		p->setBrush( cg.text() );
		p->drawRect( x+5, y+4, 2, 4 );
		p->drawRect( x+4, y+5, 4, 2 );
	    }
	    break;
	}
    default:
	QWindowsStyle::drawPrimitive( pe, p, r, cg, flags, data );
	break;
    }
}

/*! \a ce \a p \a widget \a r \a cg \a how \a data */
void QPEStyle::drawControl( ControlElement ce, QPainter *p,
			    const QWidget *widget, const QRect &r,
			    const QColorGroup &cg, SFlags how, const QStyleOption &data) const
{
    switch ( ce ) {
    case CE_PushButton:
	{
	    const QPushButton *btn = (QPushButton*)widget;
	    SFlags flags;
	    flags = Style_Default;
	    if ( btn->isDown() )
		flags |= Style_Down;
	    if ( btn->isOn() )
		flags |= Style_On;
	    if ( btn->isEnabled() )
		flags |= Style_Enabled;
	    if ( btn->isDefault() )
		flags |= Style_Default;
	    if (! btn->isFlat() && !(flags & Style_Down))
		flags |= Style_Raised;
	    p->setPen( cg.foreground() );
	    p->setBrush( QBrush(cg.button(), NoBrush) );
	    QColorGroup mycg( cg );
	    if ( flags & Style_On ) {
		QBrush fill = QBrush( cg.mid(), Dense4Pattern );
		mycg.setBrush( QColorGroup::Button, fill );
	    }
	    drawPrimitive( PE_ButtonBevel, p, r, mycg, flags, data );
	    break;
	}
    case CE_TabBarTab:
	{
	    if ( !widget || !widget->parentWidget() )
		break;

	    const QTabBar *tb = (const QTabBar *) widget;
	    bool selected = how & Style_Selected;

	    QRect r2(r);
	    if ( tb->shape()  == QTabBar::RoundedAbove ) {
		p->setPen( cg.light() );
		p->drawLine( r2.left(), r2.bottom(), r2.right(), r2.bottom() );
		if ( r2.left() == 0 )
		    p->drawPoint( tb->rect().bottomLeft() );
		else {
		    p->setPen( cg.light() );
		    p->drawLine( r2.left(), r2.bottom(), r2.right(), r2.bottom() );
		}

		if ( selected ) {
		    p->setPen( cg.background() );
		    p->drawLine( r2.left()+2, r2.top()+1, r2.right()-2, r2.top()+1 );
		    p->fillRect( QRect( r2.left()+1, r2.top()+2, r2.width()-2, r2.height()-2),
			    cg.brush( QColorGroup::Background ));
		} else {
		    r2.setRect( r2.left() + 2, r2.top() + 2,
			    r2.width() - 4, r2.height() - 2 );
		    p->setPen( cg.button() );
		    p->drawLine( r2.left()+2, r2.top()+1, r2.right()-2, r2.top()+1 );
		    p->fillRect( QRect( r2.left()+1, r2.top()+2, r2.width()-2, r2.height()-3),
			    cg.brush( QColorGroup::Button ));

		    //do shading; will not work for pixmap brushes
		    QColor bg = cg.button(); 
		    //	    int h,s,v;
		    //	    bg.hsv( &h, &s, &v );
		    int n = r2.height()/2;
		    int dark = 100;
		    for ( int i = 1; i < n; i++ ) {
			dark = (dark * (100+(i*15)/n) )/100;
			p->setPen( bg.dark( dark ) );
			int y = r2.bottom()-n+i;
			int x1 = r2.left()+1;
			int x2 = r2.right()-1;
			p->drawLine( x1, y, x2, y );
		    }
		}

		p->setPen( cg.light() );
		p->drawLine( r2.left(), r2.bottom()-1, r2.left(), r2.top() + 2 );
		p->drawPoint( r2.left()+1, r2.top() + 1 );
		p->drawLine( r2.left()+2, r2.top(),
			r2.right() - 2, r2.top() );

		p->setPen( cg.dark() );
		p->drawPoint( r2.right() - 1, r2.top() + 1 );
		p->drawLine( r2.right(), r2.top() + 2, r2.right(), r2.bottom() - 1);
	    } else if ( tb->shape() == QTabBar::RoundedBelow ) {
		if ( selected ) {
		    p->setPen( cg.background() );
		    p->drawLine( r2.left()+2, r2.bottom()-1, r2.right()-2, r2.bottom()-1 );
		    p->fillRect( QRect( r2.left()+1, r2.top(), r2.width()-2, r2.height()-2),
			    tb->palette().normal().brush( QColorGroup::Background ));
		} else {
		    p->setPen( cg.dark() );
		    p->drawLine( r2.left(), r2.top(),
			    r2.right(), r2.top() );
		    r2.setRect( r2.left() + 2, r2.top(),
			    r2.width() - 4, r2.height() - 2 );
		    p->setPen( cg.button() );
		    p->drawLine( r2.left()+2, r2.bottom()-1, r2.right()-2, r2.bottom()-1 );
		    p->fillRect( QRect( r2.left()+1, r2.top()+1, r2.width()-2, r2.height()-3),
			    tb->palette().normal().brush( QColorGroup::Button ));
		}

		p->setPen( cg.dark() );
		p->drawLine( r2.right(), r2.top(),
			r2.right(), r2.bottom() - 2 );
		p->drawPoint( r2.right() - 1, r2.bottom() - 1 );
		p->drawLine( r2.right() - 2, r2.bottom(),
			r2.left() + 2, r2.bottom() );

		p->setPen( cg.light() );
		p->drawLine( r2.left(), r2.top()+1,
			r2.left(), r2.bottom() - 2 );
		p->drawPoint( r2.left() + 1, r2.bottom() - 1 );
		if ( r2.left() == 0 )
		    p->drawPoint( tb->rect().topLeft() );

	    } else {
		QCommonStyle::drawControl( ce, p, widget, r, cg, how, data );
	    }
	    break;
	}
    default:
	QWindowsStyle::drawControl( ce, p, widget, r, cg, how, data );
	break;
    }
}

/*! \a control \a p \a widget \a r \a cg \a how \a sub \a subActive \a data */
void QPEStyle::drawComplexControl( ComplexControl control, QPainter *p,
				   const QWidget *widget, const QRect &r,
				   const QColorGroup &cg, SFlags how,
				   SCFlags sub, SCFlags subActive, const QStyleOption &data) const
{
    switch ( control ) {
    case CC_ComboBox:
	if ( sub & SC_ComboBoxArrow ) {
	    SFlags flags = Style_Default;

	    drawPrimitive( PE_ButtonBevel, p, r, cg, flags, data );

	    QRect ar =
		QStyle::visualRect( querySubControlMetrics( CC_ComboBox, widget,
							    SC_ComboBoxArrow ), widget );

	    if ( subActive == SC_ComboBoxArrow ) {
		p->setPen( cg.dark() );
		p->setBrush( cg.brush( QColorGroup::Button ) );
		p->drawRect( ar );
	    }

	    ar.addCoords( 2, 2, -2, -2 );
	    if ( widget->isEnabled() )
		flags |= Style_Enabled;

	    if ( subActive & Style_Sunken ) {
		flags |= Style_Sunken;
	    }
	    drawPrimitive( PE_ArrowDown, p, ar, cg, flags );
	}

	if ( sub & SC_ComboBoxEditField ) {
	    const QComboBox * cb = (const QComboBox *) widget;
	    QRect re =
		QStyle::visualRect( querySubControlMetrics( CC_ComboBox, widget,
							    SC_ComboBoxEditField ), widget );
	    if ( cb->hasFocus() && !cb->editable() )
		p->fillRect( re.x(), re.y(), re.width(), re.height(),
			     cg.brush( QColorGroup::Highlight ) );

	    if ( cb->hasFocus() ) {
		p->setPen( cg.highlightedText() );
		p->setBackgroundColor( cg.highlight() );

	    } else {
		p->setPen( cg.text() );
		p->setBackgroundColor( cg.background() );
	    }

	    if ( cb->hasFocus() && !cb->editable() ) {
		QRect re =
		    QStyle::visualRect( subRect( SR_ComboBoxFocusRect, cb ), widget );
		drawPrimitive( PE_FocusRect, p, re, cg, Style_FocusAtBorder, QStyleOption(cg.highlight()));
	    }
	}
	break;
    default:
	QWindowsStyle::drawComplexControl( control, p, widget, r, cg, how,
					   sub, subActive, data );
	break;
    }
}

/*! \a metric \a widget */
int QPEStyle::pixelMetric( PixelMetric metric, const QWidget *widget ) const
{
    int ret;
    switch( metric ) {
	case PM_ButtonMargin:
	    ret = 2;
	    break;
	case PM_DefaultFrameWidth:
	    ret = 1;
	    break;
	case PM_ButtonDefaultIndicator:
	    ret = 2;
	    break;
	case PM_ButtonShiftHorizontal:
	case PM_ButtonShiftVertical:
	    ret = -1;
	    break;
	case PM_IndicatorWidth:
	    ret = 15;
	    break;
	case PM_IndicatorHeight:
	    ret = 13;
	    break;
	case PM_ExclusiveIndicatorHeight:
	case PM_ExclusiveIndicatorWidth:
	    ret = 15;
	    break;
	case PM_ScrollBarExtent:
	    ret = 13;
	    break;
	case PM_SliderLength:
	    ret = 12;
	    break;
	default:
	    ret = QWindowsStyle::pixelMetric( metric, widget );
	    break;
    }
    return ret;
}

/*! \a contents \a widget \a contentsSize \a data */
QSize QPEStyle::sizeFromContents( ContentsType contents, const QWidget *widget,
				const QSize &contentsSize, const QStyleOption &data) const
{
    QSize sz(contentsSize);