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qsizepolicy.h

This is the verbatim text of the qsizepolicy.h include file. It is provided only for illustration; the copyright remains with Trolltech.

/****************************************************************************
** $Id:  qt/qsizepolicy.h   3.0.5   edited Jan 25 16:16 $
**
** Definition of the QSizePolicy class
**
** Created : 980929
**
** Copyright (C) 1998-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
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** 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.
**
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**   information about Qt Commercial License Agreements.
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**********************************************************************/

#ifndef QSIZEPOLICY_H
#define QSIZEPOLICY_H

#ifndef QT_H
#include "qglobal.h"
#endif // QT_H

class Q_EXPORT QSizePolicy
{
private:
    enum { HSize = 6, HMask = 0x3f, VMask = HMask << HSize,
	   MayGrow = 1, ExpMask = 2, MayShrink = 4 };
public:
    enum SizeType { Fixed = 0,
		    Minimum = MayGrow,
		    Maximum = MayShrink,
		    Preferred = MayGrow|MayShrink ,
		    MinimumExpanding = MayGrow|ExpMask,
		    Expanding = MayGrow|MayShrink|ExpMask,
		    Ignored = ExpMask //magic value
    };

    enum ExpandData { NoDirection = 0,
		      Horizontally = 1,
		      Vertically = 2,
		      BothDirections = Horizontally | Vertically
#ifndef QT_NO_COMPAT
		      ,Horizontal = Horizontally,
		      Vertical = Vertically
#endif
    };

    QSizePolicy() : data( 0 ) {}

    QSizePolicy( SizeType hor, SizeType ver, bool hfw = FALSE )
	: data( hor | (ver<<HSize) | (hfw ? (Q_UINT16)(1<<2*HSize) : 0) ) {}
    QSizePolicy( SizeType hor, SizeType ver, uchar hors, uchar vers, bool hfw = FALSE );

    SizeType horData() const { return (SizeType)( data & HMask ); }
    SizeType verData() const { return (SizeType)(( data & VMask ) >> HSize); }

    bool mayShrinkHorizontally() const { return horData() & MayShrink || horData() == Ignored; }
    bool mayShrinkVertically() const { return verData() & MayShrink || verData() == Ignored; }
    bool mayGrowHorizontally() const { return horData() & MayGrow || horData() == Ignored; }
    bool mayGrowVertically() const { return verData() & MayGrow || verData() == Ignored; }

    ExpandData expanding() const
    {
	return (ExpandData)( (int)(verData()&ExpMask ? Vertically : 0)+
			     (int)(horData()&ExpMask ? Horizontally : 0) );
    }

    void setHorData( SizeType d ) { data = (Q_UINT16)(data & ~HMask) | d; }
    void setVerData( SizeType d ) { data = (Q_UINT16)(data & ~(HMask<<HSize)) |
					   (d<<HSize); }
		
    void setHeightForWidth( bool b ) { data = b ? (Q_UINT16)( data | ( 1 << 2*HSize ) )
					      : (Q_UINT16)( data & ~( 1 << 2*HSize ) );  }
    bool hasHeightForWidth() const { return data & ( 1 << 2*HSize ); }

    bool operator==( const QSizePolicy& s ) const { return data == s.data; }
    bool operator!=( const QSizePolicy& s ) const { return data != s.data; }


    uint horStretch() const { return data >> 24; }
    uint verStretch() const { return (data >> 16) & 0xff; }
    void setHorStretch( uchar sf ) { data = (data&0x00ffffff) | (uint(sf)<<24); }
    void setVerStretch( uchar sf ) { data = (data&0xff00ffff) | (uint(sf)<<16); }

private:
    QSizePolicy( int i ): data( (Q_UINT32)i ) {}

    Q_UINT32 data;
};

inline QSizePolicy::QSizePolicy( SizeType hor, SizeType ver, uchar hors, uchar vers, bool hfw )
    : data( hor | (ver<<HSize) | (hfw ? (Q_UINT16)(1<<2*HSize) : 0) ) {
	setHorStretch( hors );
	setVerStretch( vers );
}


#endif // QSIZEPOLICY_H