Qt Toolkit - qsizepolicy.h include file

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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/src/kernel/qsizepolicy.h   2.3.0   edited 2001-01-26 $
    **
    ** 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.
    **
    ** 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.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    **********************************************************************/

    #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 = Minimum|ExpMask,
                        Expanding = MinimumExpanding|MayShrink };

        enum ExpandData { NoDirection = 0,
                          Horizontal = 1,
                          Vertical = 2,
                          BothDirections = Horizontal | Vertical };

        QSizePolicy() { data = 0; }

        QSizePolicy( SizeType hor, SizeType ver, bool hfw = FALSE );

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

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

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

        void setHorData( SizeType d ) { data = (data & ~HMask) | d; }
        void setVerData( SizeType d ) { data = (data & ~(HMask<<HSize)) |
                                               (d<<HSize); }

        void setHeightForWidth( bool b ) { data = b ? ( data | ( 1 << 2*HSize ) )
                                                  : ( 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; }

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

        Q_UINT16 data;
    };

    #if !(defined(__GNUC__) && __GNUC__ == 2 && __GNUC_MINOR__ == 96)
    inline QSizePolicy::QSizePolicy( SizeType hor, SizeType ver, bool hfw )
            : data( hor | (ver<<HSize) | (hfw ? (1<<2*HSize) : 0) ) {}
    #endif

    #endif