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# ntqwmatrix.h

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

    /****************************************************************************
    ** $Id: qt/ntqwmatrix.h   3.3.8   edited Jan 11 14:38 $
    **
    ** Definition of TQWMatrix class
    **
    ** Created : 941020
    **
    ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
    **
    ** This file is part of the kernel module of the TQt GUI Toolkit.
    **
    ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file. Alternatively you may (at your option) use any
    ** later version of the GNU General Public License if such license has
    ** been publicly approved by Trolltech ASA (or its successors, if any)
    ** and the KDE Free TQt Foundation.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/.
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** This file may be used under the terms of the Q Public License as
    ** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
    ** included in the packaging of this file.  Licensees holding valid TQt
    ** Commercial licenses may use this file in accordance with the TQt
    ** Commercial License Agreement provided with the Software.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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    **********************************************************************/

    #ifndef TQWMATRIX_H
    #define TQWMATRIX_H

    #ifndef QT_H
    #include "ntqwindowdefs.h"
    #include "ntqpointarray.h"
    #include "ntqrect.h"
    #include "ntqregion.h"
    #endif // QT_H

    #ifndef TQT_NO_WMATRIX

    class TQ_EXPORT TQWMatrix					// 2D transform matrix
    {
    public:
        TQWMatrix();
        TQWMatrix( double m11, double m12, double m21, double m22,
    	      double dx, double dy );

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

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

        void	map( int x, int y, int *tx, int *ty )	      const;
        void	map( double x, double y, double *tx, double *ty ) const;
        TQRect	mapRect( const TQRect & )	const;

        TQPoint	map( const TQPoint &p )	const { return operator *( p ); }
        TQRect	map( const TQRect &r )	const { return mapRect ( r ); }
        TQPointArray map( const TQPointArray &a ) const { return operator * ( a ); }
        TQRegion     map( const TQRegion &r ) const { return operator *( r ); }
        TQRegion     mapToRegion( const TQRect &r ) const { return operator *( r ); }
        TQPointArray	mapToPolygon( const TQRect &r )	const;

        void	reset();
        bool	isIdentity() const;

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

        bool isInvertible() const { return (_m11*_m22 - _m12*_m21) != 0; }
        double det() const { return _m11*_m22 - _m12*_m21; }

        TQWMatrix	invert( bool * = 0 ) const;

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

        /* we use matrix multiplication semantics here */
        TQPoint operator * (const TQPoint & ) const;
        TQRegion operator * (const TQRect & ) const;
        TQRegion operator * (const TQRegion & ) const;
        TQPointArray operator *  ( const TQPointArray &a ) const;

        enum TransformationMode {
    	Points, Areas
        };
        static void setTransformationMode( TQWMatrix::TransformationMode m );
        static TransformationMode transformationMode();
    private:
        double	_m11, _m12;
        double	_m21, _m22;
        double	_dx,  _dy;
    };

    TQ_EXPORT TQWMatrix operator*( const TQWMatrix &, const TQWMatrix & );

    /*****************************************************************************
      TQWMatrix stream functions
     *****************************************************************************/

    TQ_EXPORT TQDataStream &operator<<( TQDataStream &, const TQWMatrix & );
    TQ_EXPORT TQDataStream &operator>>( TQDataStream &, TQWMatrix & );

    #endif // TQT_NO_WMATRIX

    #endif // TQWMATRIX_H