# qregion.h

This is the verbatim text of the qregion.h include file. It is is provided only for illustration; the copyright remains with Troll Tech.

    /****************************************************************************
    ** $Id: qregion.h,v 2.14.2.4 1999/01/22 15:45:28 warwick Exp $
    **
    ** Definition of QRegion class
    **
    ** Created : 940514
    **
    ** Copyright (C) 1992-1999 Troll Tech AS.  All rights reserved.
    **
    ** This file is part of Qt Free Edition, version 1.45.
    **
    ** See the file LICENSE included in the distribution for the usage
    ** and distribution terms, or http://www.troll.no/free-license.html.
    **
    ** IMPORTANT NOTE: You may NOT copy this file or any part of it into
    ** your own programs or libraries.
    **
    ** Please see http://www.troll.no/pricing.html for information about
    ** Qt Professional Edition, which is this same library but with a
    ** license which allows creation of commercial/proprietary software.
    **
    *****************************************************************************/

    #ifndef QREGION_H
    #define QREGION_H

    #ifndef QT_H
    #include "qshared.h"
    #include "qrect.h"
    #include "qstring.h"
    #endif // QT_H

    class Q_EXPORT QRegion
    {
    public:
        enum RegionType { Rectangle, Ellipse };

        QRegion();
        QRegion( int x, int y, int w, int h, RegionType = Rectangle );
        QRegion( const QRect &, RegionType = Rectangle );
        QRegion( const QPointArray &, bool winding=FALSE );
        QRegion( const QRegion & );
        QRegion( const QBitmap & );
       ~QRegion();
        QRegion &operator=( const QRegion & );

        bool    isNull()   const;
        bool    isEmpty()  const;

        bool    contains( const QPoint &p ) const;
        bool    contains( const QRect &r )  const;

        void    translate( int dx, int dy );

        QRegion unite( const QRegion & )    const;
        QRegion intersect( const QRegion &) const;
        QRegion subtract( const QRegion & ) const;

    // Work around clash with the ANSI C++ keyword "xor".
    //
    // Use of QRegion::xor() is deprecated - you should use QRegion::eor().
    // Calls to QRegion::xor() will work for now, but give a warning.
    //
    // If possible, compile the Qt library without this ANSI C++ feature enabled,
    // thus including both the old xor() and new eor() in the library, so old
    // binaries will continue to work (with the warning).
    //
    // We also hide the xor() function if there is a #define for xor, in
    // case someone is using #define xor ^ to work around deficiencies in
    // their compiler that cause problems with some other header files.
    //
    #if !(defined(__STRICT_ANSI__) && defined(_CC_GNU_)) && !defined(_CC_EDG_) && !defined(_CC_HP_) && !defined(_CC_HP_ACC_) && !defined(_CC_USLC_) && !defined(_CC_MWERKS_) && !defined(xor)
        QRegion xor( const QRegion & )      const;
    #endif
        QRegion eor( const QRegion & )      const;

        QRect   boundingRect() const;
        QArray<QRect> rects() const;

        bool    operator==( const QRegion & )  const;
        bool    operator!=( const QRegion &r ) const
                            { return !(operator==(r)); }

    #if defined(_WS_WIN_)
        HANDLE  handle() const { return data->rgn; }
    #elif defined(_WS_PM_)
        HANDLE  handle() const { return data->rgn; }
    #elif defined(_WS_X11_)
        Region  handle() const { return data->rgn; }
    #endif

        friend Q_EXPORT QDataStream &operator<<( QDataStream &, const QRegion & );
        friend Q_EXPORT QDataStream &operator>>( QDataStream &, QRegion & );

    private:
        QRegion( bool );
        QRegion copy() const;
        void    detach();
    #if defined(_WS_WIN_)
        QRegion winCombine( const QRegion &, int ) const;
    #endif
        void    cmd( int id, void *, const QRegion * = 0, const QRegion * = 0 );
        void    exec( const QByteArray & );
        struct QRegionData : public QShared {
    #if defined(_WS_WIN_)
            HANDLE rgn;
    #elif defined(_WS_PM_)
            HANDLE rgn;
    #elif defined(_WS_X11_)
            Region rgn;
    #endif
            bool   is_null;
        } *data;
    #if defined(_WS_PM_)
        static HPS hps;
    #endif
    };

    #define QRGN_SETRECT            1               // region stream commands
    #define QRGN_SETELLIPSE         2               //  (these are internal)
    #define QRGN_SETPTARRAY_ALT     3
    #define QRGN_SETPTARRAY_WIND    4
    #define QRGN_TRANSLATE          5
    #define QRGN_OR                 6
    #define QRGN_AND                7
    #define QRGN_SUB                8
    #define QRGN_XOR                9
    #define QRGN_RECTS             10

    /*****************************************************************************
      QRegion stream functions
     *****************************************************************************/

    Q_EXPORT QDataStream &operator<<( QDataStream &, const QRegion & );
    Q_EXPORT QDataStream &operator>>( QDataStream &, QRegion & );

    #endif // QREGION_H