/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTRANSFORM_H
#define QTRANSFORM_H
#include <QtGui/qmatrix.h>
#include <QtGui/qpainterpath.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>
#if defined(Q_OS_VXWORKS) && defined(m_type)
# undef m_type
#endif
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Gui)
class QVariant;
class Q_GUI_EXPORT QTransform
{
Q_ENUMS(TransformationType)
public:
enum TransformationType {
TxNone = 0x00,
TxTranslate = 0x01,
TxScale = 0x02,
TxRotate = 0x04,
TxShear = 0x08,
TxProject = 0x10
};
inline explicit QTransform(Qt::Initialization) : affine(Qt::Uninitialized) {}
QTransform();
QTransform(qreal h11, qreal h12, qreal h13,
qreal h21, qreal h22, qreal h23,
qreal h31, qreal h32, qreal h33 = 1.0);
QTransform(qreal h11, qreal h12, qreal h21,
qreal h22, qreal dx, qreal dy);
explicit QTransform(const QMatrix &mtx);
bool isAffine() const;
bool isIdentity() const;
bool isInvertible() const;
bool isScaling() const;
bool isRotating() const;
bool isTranslating() const;
TransformationType type() const;
inline qreal determinant() const;
qreal det() const;
qreal m11() const;
qreal m12() const;
qreal m13() const;
qreal m21() const;
qreal m22() const;
qreal m23() const;
qreal m31() const;
qreal m32() const;
qreal m33() const;
qreal dx() const;
qreal dy() const;
void setMatrix(qreal m11, qreal m12, qreal m13,
qreal m21, qreal m22, qreal m23,
qreal m31, qreal m32, qreal m33);
QTransform inverted(bool *invertible = 0) const;
QTransform adjoint() const;
QTransform transposed() const;
QTransform &translate(qreal dx, qreal dy);
QTransform &scale(qreal sx, qreal sy);
QTransform &shear(qreal sh, qreal sv);
QTransform &rotate(qreal a, Qt::Axis axis = Qt::ZAxis);
QTransform &rotateRadians(qreal a, Qt::Axis axis = Qt::ZAxis);
static bool squareToQuad(const QPolygonF &square, QTransform &result);
static bool quadToSquare(const QPolygonF &quad, QTransform &result);
static bool quadToQuad(const QPolygonF &one,
const QPolygonF &two,
QTransform &result);
bool operator==(const QTransform &) const;
bool operator!=(const QTransform &) const;
QTransform &operator*=(const QTransform &);
QTransform operator*(const QTransform &o) const;
QTransform &operator=(const QTransform &);
operator QVariant() const;
void reset();
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;
QRect mapRect(const QRect &) const;
QRectF mapRect(const QRectF &) const;
void map(int x, int y, int *tx, int *ty) const;
void map(qreal x, qreal y, qreal *tx, qreal *ty) const;
const QMatrix &toAffine() const;
QTransform &operator*=(qreal div);
QTransform &operator/=(qreal div);
QTransform &operator+=(qreal div);
QTransform &operator-=(qreal div);
static QTransform fromTranslate(qreal dx, qreal dy);
static QTransform fromScale(qreal dx, qreal dy);
private:
inline QTransform(qreal h11, qreal h12, qreal h13,
qreal h21, qreal h22, qreal h23,
qreal h31, qreal h32, qreal h33, bool)
: affine(h11, h12, h21, h22, h31, h32, true)
, m_13(h13), m_23(h23), m_33(h33)
, m_type(TxNone)
, m_dirty(TxProject) {}
inline QTransform(bool)
: affine(true)
, m_13(0), m_23(0), m_33(1)
, m_type(TxNone)
, m_dirty(TxNone) {}
inline TransformationType inline_type() const;
QMatrix affine;
qreal m_13;
qreal m_23;
qreal m_33;
mutable uint m_type : 5;
mutable uint m_dirty : 5;
class Private;
Private *d;
};
Q_DECLARE_TYPEINFO(QTransform, Q_MOVABLE_TYPE);
/******* inlines *****/
inline QTransform::TransformationType QTransform::inline_type() const
{
if (m_dirty == TxNone)
return static_cast<TransformationType>(m_type);
return type();
}
inline bool QTransform::isAffine() const
{
return inline_type() < TxProject;
}
inline bool QTransform::isIdentity() const
{
return inline_type() == TxNone;
}
inline bool QTransform::isInvertible() const
{
return !qFuzzyIsNull(determinant());
}
inline bool QTransform::isScaling() const
{
return type() >= TxScale;
}
inline bool QTransform::isRotating() const
{
return inline_type() >= TxRotate;
}
inline bool QTransform::isTranslating() const
{
return inline_type() >= TxTranslate;
}
inline qreal QTransform::determinant() const
{
return affine._m11*(m_33*affine._m22-affine._dy*m_23) -
affine._m21*(m_33*affine._m12-affine._dy*m_13)+affine._dx*(m_23*affine._m12-affine._m22*m_13);
}
inline qreal QTransform::det() const
{
return determinant();
}
inline qreal QTransform::m11() const
{
return affine._m11;
}
inline qreal QTransform::m12() const
{
return affine._m12;
}
inline qreal QTransform::m13() const
{
return m_13;
}
inline qreal QTransform::m21() const
{
return affine._m21;
}
inline qreal QTransform::m22() const
{
return affine._m22;
}
inline qreal QTransform::m23() const
{
return m_23;
}
inline qreal QTransform::m31() const
{
return affine._dx;
}
inline qreal QTransform::m32() const
{
return affine._dy;
}
inline qreal QTransform::m33() const
{
return m_33;
}
inline qreal QTransform::dx() const
{
return affine._dx;
}
inline qreal QTransform::dy() const
{
return affine._dy;
}
inline QTransform &QTransform::operator*=(qreal num)
{
if (num == 1.)
return *this;
affine._m11 *= num;
affine._m12 *= num;
m_13 *= num;
affine._m21 *= num;
affine._m22 *= num;
m_23 *= num;
affine._dx *= num;
affine._dy *= num;
m_33 *= num;
m_dirty |= TxScale;
return *this;
}
inline QTransform &QTransform::operator/=(qreal div)
{
if (div == 0)
return *this;
div = 1/div;
return operator*=(div);
}
inline QTransform &QTransform::operator+=(qreal num)
{
if (num == 0)
return *this;
affine._m11 += num;
affine._m12 += num;
m_13 += num;
affine._m21 += num;
affine._m22 += num;
m_23 += num;
affine._dx += num;
affine._dy += num;
m_33 += num;
m_dirty |= TxProject;
return *this;
}
inline QTransform &QTransform::operator-=(qreal num)
{
if (num == 0)
return *this;
affine._m11 -= num;
affine._m12 -= num;
m_13 -= num;
affine._m21 -= num;
affine._m22 -= num;
m_23 -= num;
affine._dx -= num;
affine._dy -= num;
m_33 -= num;
m_dirty |= TxProject;
return *this;
}
inline bool qFuzzyCompare(const QTransform& t1, const QTransform& t2)
{
return qFuzzyCompare(t1.m11(), t2.m11())
&& qFuzzyCompare(t1.m12(), t2.m12())
&& qFuzzyCompare(t1.m13(), t2.m13())
&& qFuzzyCompare(t1.m21(), t2.m21())
&& qFuzzyCompare(t1.m22(), t2.m22())
&& qFuzzyCompare(t1.m23(), t2.m23())
&& qFuzzyCompare(t1.m31(), t2.m31())
&& qFuzzyCompare(t1.m32(), t2.m32())
&& qFuzzyCompare(t1.m33(), t2.m33());
}
/****** stream functions *******************/
#ifndef QT_NO_DATASTREAM
Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QTransform &);
Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QTransform &);
#endif
#ifndef QT_NO_DEBUG_STREAM
Q_GUI_EXPORT QDebug operator<<(QDebug, const QTransform &);
#endif
/****** end stream functions *******************/
// mathematical semantics
Q_GUI_EXPORT_INLINE QPoint operator*(const QPoint &p, const QTransform &m)
{ return m.map(p); }
Q_GUI_EXPORT_INLINE QPointF operator*(const QPointF &p, const QTransform &m)
{ return m.map(p); }
Q_GUI_EXPORT_INLINE QLineF operator*(const QLineF &l, const QTransform &m)
{ return m.map(l); }
Q_GUI_EXPORT_INLINE QLine operator*(const QLine &l, const QTransform &m)
{ return m.map(l); }
Q_GUI_EXPORT_INLINE QPolygon operator *(const QPolygon &a, const QTransform &m)
{ return m.map(a); }
Q_GUI_EXPORT_INLINE QPolygonF operator *(const QPolygonF &a, const QTransform &m)
{ return m.map(a); }
Q_GUI_EXPORT_INLINE QRegion operator *(const QRegion &r, const QTransform &m)
{ return m.map(r); }
Q_GUI_EXPORT_INLINE QPainterPath operator *(const QPainterPath &p, const QTransform &m)
{ return m.map(p); }
Q_GUI_EXPORT_INLINE QTransform operator *(const QTransform &a, qreal n)
{ QTransform t(a); t *= n; return t; }
Q_GUI_EXPORT_INLINE QTransform operator /(const QTransform &a, qreal n)
{ QTransform t(a); t /= n; return t; }
Q_GUI_EXPORT_INLINE QTransform operator +(const QTransform &a, qreal n)
{ QTransform t(a); t += n; return t; }
Q_GUI_EXPORT_INLINE QTransform operator -(const QTransform &a, qreal n)
{ QTransform t(a); t -= n; return t; }
QT_END_NAMESPACE
QT_END_HEADER
#endif