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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 3.3.8 edited Jan 11 14:38 $
**
** Definition of QWMatrix class
**
** Created : 941020
**
** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the Qt 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 Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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#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 & ) const;
QPoint map( const QPoint &p ) const { return operator *( p ); }
QRect map( const QRect &r ) const { return mapRect ( r ); }
QPointArray map( const QPointArray &a ) const { return operator * ( a ); }
QRegion map( const QRegion &r ) const { return operator *( r ); }
QRegion mapToRegion( const QRect &r ) const { return operator *( r ); }
QPointArray mapToPolygon( const QRect &r ) const;
void reset();
bool isIdentity() const;
QWMatrix &translate( double dx, double dy );
QWMatrix &scale( double sx, double sy );
QWMatrix &shear( double sh, double sv );
QWMatrix &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 & ) const;
bool operator!=( const QWMatrix & ) const;
QWMatrix &operator*=( const QWMatrix & );
/* we use matrix multiplication semantics here */
QPoint operator * (const QPoint & ) const;
QRegion operator * (const QRect & ) const;
QRegion operator * (const QRegion & ) const;
QPointArray operator * ( const QPointArray &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 &, const QWMatrix & );
/*****************************************************************************
QWMatrix stream functions
*****************************************************************************/
Q_EXPORT QDataStream &operator<<( QDataStream &, const QWMatrix & );
Q_EXPORT QDataStream &operator>>( QDataStream &, QWMatrix & );
#endif // QT_NO_WMATRIX
#endif // QWMATRIX_H
</pre>
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