File: qwmatrix-h.html

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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>qwmatrix.h</h1>

<p>This is the verbatim text of the qwmatrix.h include file. It is provided only for illustration; the copyright remains with Trolltech.
<hr>
<pre>
/****************************************************************************
** $Id: qt/qwmatrix.h   3.3.7   edited Aug 31 2005 $
**
** Definition of QWMatrix class
**
** Created : 941020
**
** Copyright (C) 1992-2005 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 QWMATRIX_H
#define QWMATRIX_H

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

#ifndef QT_NO_WMATRIX


class Q_EXPORT QWMatrix					// 2D transform matrix
{
public:
    QWMatrix();
    QWMatrix( 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;
    QRect	mapRect( const QRect &amp; )	const;

    QPoint	map( const QPoint &amp;p )	const { return operator *( p ); }
    QRect	map( const QRect &amp;r )	const { return mapRect ( r ); }
    QPointArray map( const QPointArray &amp;a ) const { return operator * ( a ); }
    QRegion     map( const QRegion &amp;r ) const { return operator *( r ); }
    QRegion     mapToRegion( const QRect &amp;r ) const { return operator *( r ); }
    QPointArray	mapToPolygon( const QRect &amp;r )	const;

    void	reset();
    bool	isIdentity() const;

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

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

    QWMatrix	invert( bool * = 0 ) const;

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

    /* we use matrix multiplication semantics here */
    QPoint operator * (const QPoint &amp; ) const;
    QRegion operator * (const QRect &amp; ) const;
    QRegion operator * (const QRegion &amp; ) const;
    QPointArray operator *  ( const QPointArray &amp;a ) const;

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

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


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

Q_EXPORT QDataStream &amp;operator&lt;&lt;( QDataStream &amp;, const QWMatrix &amp; );
Q_EXPORT QDataStream &amp;operator&gt;&gt;( QDataStream &amp;, QWMatrix &amp; );


#endif // QT_NO_WMATRIX

#endif // QWMATRIX_H
</pre>
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