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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QMATRIX_H
#define QMATRIX_H
#include <QtGui/qpolygon.h>
#include <QtGui/qregion.h>
#include <QtGui/qwindowdefs.h>
#include <QtCore/qline.h>
#include <QtCore/qpoint.h>
#include <QtCore/qrect.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Gui)
class QPainterPath;
class QVariant;
class Q_GUI_EXPORT QMatrix // 2D transform matrix
{
public:
QMatrix();
QMatrix(qreal m11, qreal m12, qreal m21, qreal m22,
qreal dx, qreal dy);
QMatrix(const QMatrix &matrix);
void setMatrix(qreal m11, qreal m12, qreal m21, qreal m22,
qreal dx, qreal dy);
qreal m11() const { return _m11; }
qreal m12() const { return _m12; }
qreal m21() const { return _m21; }
qreal m22() const { return _m22; }
qreal dx() const { return _dx; }
qreal dy() const { return _dy; }
void map(int x, int y, int *tx, int *ty) const;
void map(qreal x, qreal y, qreal *tx, qreal *ty) const;
QRect mapRect(const QRect &) const;
QRectF mapRect(const QRectF &) const;
QPoint map(const QPoint &p) const;
QPointF map(const QPointF&p) const;
QLine map(const QLine &l) const;
QLineF map(const QLineF &l) const;
QPolygonF map(const QPolygonF &a) const;
QPolygon map(const QPolygon &a) const;
QRegion map(const QRegion &r) const;
QPainterPath map(const QPainterPath &p) const;
QPolygon mapToPolygon(const QRect &r) const;
void reset();
inline bool isIdentity() const;
QMatrix &translate(qreal dx, qreal dy);
QMatrix &scale(qreal sx, qreal sy);
QMatrix &shear(qreal sh, qreal sv);
QMatrix &rotate(qreal a);
bool isInvertible() const { return !qFuzzyCompare(_m11*_m22 - _m12*_m21 + 1, 1); }
qreal det() const { return _m11*_m22 - _m12*_m21; }
QMatrix inverted(bool *invertible = 0) const;
bool operator==(const QMatrix &) const;
bool operator!=(const QMatrix &) const;
QMatrix &operator*=(const QMatrix &);
QMatrix operator*(const QMatrix &o) const;
QMatrix &operator=(const QMatrix &);
operator QVariant() const;
#ifdef QT3_SUPPORT
inline QT3_SUPPORT QMatrix invert(bool *invertible=0) const { return inverted(invertible); }
inline QT3_SUPPORT QRect map(const QRect &r) const { return mapRect(r); }
QT3_SUPPORT QRegion mapToRegion(const QRect &r) const;
#endif
private:
friend class QTransform;
qreal _m11, _m12;
qreal _m21, _m22;
qreal _dx, _dy;
};
Q_DECLARE_TYPEINFO(QMatrix, Q_MOVABLE_TYPE);
// mathematical semantics
Q_GUI_EXPORT_INLINE QPoint operator*(const QPoint &p, const QMatrix &m)
{ return m.map(p); }
Q_GUI_EXPORT_INLINE QPointF operator*(const QPointF &p, const QMatrix &m)
{ return m.map(p); }
Q_GUI_EXPORT_INLINE QLineF operator*(const QLineF &l, const QMatrix &m)
{ return m.map(l); }
Q_GUI_EXPORT_INLINE QLine operator*(const QLine &l, const QMatrix &m)
{ return m.map(l); }
Q_GUI_EXPORT_INLINE QPolygon operator *(const QPolygon &a, const QMatrix &m)
{ return m.map(a); }
Q_GUI_EXPORT_INLINE QPolygonF operator *(const QPolygonF &a, const QMatrix &m)
{ return m.map(a); }
Q_GUI_EXPORT_INLINE QRegion operator *(const QRegion &r, const QMatrix &m)
{ return m.map(r); }
Q_GUI_EXPORT QPainterPath operator *(const QPainterPath &p, const QMatrix &m);
inline bool QMatrix::isIdentity() const
{
return qFuzzyCompare(_m11, 1) && qFuzzyCompare(_m22, 1) && qFuzzyCompare(_m12 + 1, 1)
&& qFuzzyCompare(_m21 + 1, 1) && qFuzzyCompare(_dx + 1, 1) && qFuzzyCompare(_dy + 1, 1);
}
/*****************************************************************************
QMatrix stream functions
*****************************************************************************/
Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QMatrix &);
Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QMatrix &);
#ifndef QT_NO_DEBUG_STREAM
Q_GUI_EXPORT QDebug operator<<(QDebug, const QMatrix &);
#endif
#ifdef QT3_SUPPORT
QT_BEGIN_INCLUDE_NAMESPACE
#include <QtGui/qwmatrix.h>
QT_END_INCLUDE_NAMESPACE
#endif
QT_END_NAMESPACE
QT_END_HEADER
#endif // QMATRIX_H
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