# qwmatrix.h

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

    /****************************************************************************
    ** $Id: qwmatrix.h,v 2.4.2.2 1998/08/25 09:20:53 hanord Exp $
    **
    ** Definition of QWMatrix class
    **
    ** Created : 941020
    **
    ** 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 QWMATRIX_H
    #define QWMATRIX_H

    #ifndef QT_H
    #include "qwindowdefs.h"
    #include "qpointarray.h"
    #include "qrect.h"
    #endif // QT_H

    class Q_EXPORT QWMatrix                                 // 2D transform matrix
    {
    public:
        QWMatrix();
        QWMatrix( float m11, float m12, float m21, float m22,
                  float dx,  float dy );

        void        setMatrix( float m11, float m12, float m21, float m22,
                               float dx,  float dy );

        float       m11() const { return _m11; }
        float       m12() const { return _m12; }
        float       m21() const { return _m21; }
        float       m22() const { return _m22; }
        float       dx()  const { return _dx; }
        float       dy()  const { return _dy; }

        void        map( int x, int y, int *tx, int *ty )         const;
        void        map( float x, float y, float *tx, float *ty ) const;
        QPoint      map( const QPoint & )   const;
        QRect       map( const QRect & )    const;
        QPointArray map( const QPointArray & ) const;

        void        reset();

        QWMatrix   &translate( float dx, float dy );
        QWMatrix   &scale( float sx, float sy );
        QWMatrix   &shear( float sh, float sv );
        QWMatrix   &rotate( float a );

        QWMatrix    invert( bool * = 0 ) const;

        bool        operator==( const QWMatrix & ) const;
        bool        operator!=( const QWMatrix & ) const;
        QWMatrix   &operator*=( const QWMatrix & );

    private:
        QWMatrix   &bmul( const QWMatrix & );
        float       _m11, _m12;
        float       _m21, _m22;
        float       _dx,  _dy;
    };

    Q_EXPORT QWMatrix operator*( const QWMatrix &, const QWMatrix & );

    /*****************************************************************************
      QWMatrix stream functions
     *****************************************************************************/

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

    #endif // QWMATRIX_H