/****************************************************************************
** $Id: qcompactstyle.cpp 8 2005-11-16 19:36:46Z dmik $
**
** Implementation of compact style class
**
** Created : 006231
**
** Copyright (C) 2000 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.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** 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/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
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** not clear to you.
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**********************************************************************/

#include "qcompactstyle.h"

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

#include "qfontmetrics.h"
#include "qpalette.h"
#include "qpainter.h"
#include "qdrawutil.h"
#include "qmenudata.h"
#include "qpopupmenu.h"

QCompactStyle::QCompactStyle()
: QWindowsStyle()
{
}

/*! \reimp */
int QCompactStyle::pixelMetric( PixelMetric metric, const QWidget *widget )
{
    int ret;
    switch ( metric ) {
    case PM_ButtonMargin:
	ret = 2;
	break;
	// tws - I added this in to stop this "Windows Scroll behaivor."  Remove it
	// if you don't want it.
    case PM_MaximumDragDistance:
	ret = -1;
	break;
    default:
	ret = QWindowsStyle::pixelMetric( metric, widget );
	break;
    }
    return ret;
}

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	= 4;	// 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

static int extraPopupMenuItemWidth( bool checkable, int maxpmw, QMenuItem* mi, const QFontMetrics& /*fm*/ )
{
    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;
}

static int popupMenuItemHeight( bool /*checkable*/, QMenuItem* mi, const QFontMetrics& fm )
{
    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( QIconSet::Small, QIconSet::Normal ).height() + 2*motifItemFrame );
    }
    if ( mi->custom() )
	h = QMAX( h, mi->custom()->sizeHint().height() + 2*motifItemVMargin + 2*motifItemFrame ) - 1;
    return h;
}

void 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)
{

}

/*! \reimp */
void QCompactStyle::drawControl( ControlElement element, QPainter *p, const QWidget *widget, const QRect &r,
		  const QColorGroup &g, SFlags flags, const QStyleOption& opt )
{
    switch ( element ) {
    case CE_PopupMenuItem:
	{
	    if (! widget || opt.isDefault())
		break;

	    const QPopupMenu *popupmenu = (const QPopupMenu *) widget;
	    QMenuItem *mi = opt.menuItem();
            
            // QPopupMenu has WResizeNoErase and WRepaintNoErase flags, so we
            // must erase areas not covered by menu items (this is requested by
            // QPopupMenu using 0 as the menu item argument).
            // [Win32 version feels ok without this, because it doesn't actually
            // fully obey WResizeNoErase and WRepaintNoErase: WM_ERASEBKGND always
            // erases the background before WM_PAINT and after every resize].
#if !defined (Q_WS_PM)
	    if ( !mi )
		break;
#endif

	    int tab = opt.tabWidth();
	    int maxpmw = opt.maxIconWidth();
	    bool dis = !(flags & Style_Enabled);
	    bool checkable = popupmenu->isCheckable();
	    bool act = flags & Style_Active;
	    int x, y, w, h;
	    r.rect( &x, &y, &w, &h );

	    QColorGroup itemg = g;

	    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 );
		p->setPen( g.light() );
		p->drawLine( x, y+1, x+w, y+1 );
		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 ( checkable && mi->isChecked() )
		    pixmap = mi->iconSet()->pixmap( QIconSet::Small, mode, QIconSet::On );
		else
		    pixmap = mi->iconSet()->pixmap( QIconSet::Small, mode );
		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() ) {

		    SFlags cflags = Style_Default;
		    if (! dis)
			cflags |= Style_Enabled;
		    if (act)
			cflags |= Style_On;

		    drawPrimitive( PE_CheckMark, p, QRect(x + motifItemFrame + 2, y + motifItemFrame,
				    mw, mh), itemg, cflags, opt );
		}
	    }

	    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, !dis,
					 x+xm+1, y+m+1, w-xm-tab+1, h-2*m );
		    p->setPen( discol );
		}
		mi->custom()->paint( p, itemg, act, !dis,
				     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 ) );
		    s = s.left( t );
		}
		if ( dis && !act ) {
		    p->setPen( g.light() );
		    p->drawText( x+xm+1, y+m+1, w-xm+1, h-2*m, text_flags, s, t );
		    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 );
		    drawPrimitive(PE_ArrowRight, p, QRect(x+w - motifArrowHMargin - motifItemFrame - dim, y + h / 2 - dim / 2, dim, dim),
				  g2, Style_Enabled);
		} else {
		    drawPrimitive(PE_ArrowRight, p, QRect(x+w - motifArrowHMargin - motifItemFrame - dim, y + h / 2 - dim / 2, dim, dim),
				  g, !dis ? Style_Enabled : Style_Default);
		}
	    }
	}
	break;

    default:
	QWindowsStyle::drawControl( element, p, widget, r, g, flags, opt );
	break;
    }
}

#endif
