qtransform.h
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上传日期:2022-06-22
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- /****************************************************************************
- **
- ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
- ** Contact: Qt Software Information (qt-info@nokia.com)
- **
- ** This file is part of the QtGui module of the Qt Toolkit.
- **
- ** Commercial Usage
- ** Licensees holding valid Qt Commercial licenses may use this file in
- ** accordance with the Qt Commercial License Agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and Nokia.
- **
- **
- ** GNU General Public License Usage
- ** Alternatively, 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. Please review the following information
- ** to ensure GNU General Public Licensing requirements will be met:
- ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
- ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special
- ** exception, Nokia gives you certain additional rights. These rights
- ** are described in the Nokia Qt GPL Exception version 1.3, included in
- ** the file GPL_EXCEPTION.txt in this package.
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- ** Designer, grants users of the Qt/Eclipse Integration plug-in the
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- ****************************************************************************/
- #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>
- 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
- };
- 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 h13,
- qreal h21, qreal h22, qreal h23);
- 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);
- private:
- 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 bool QTransform::isAffine() const
- {
- return qFuzzyCompare(m_13 + 1, 1) && qFuzzyCompare(m_23 + 1, 1);
- }
- inline bool QTransform::isIdentity() const
- {
- #define qFZ qFuzzyCompare
- return qFZ(affine._m11, 1) && qFZ(affine._m12 + 1, 1) && qFZ(m_13 + 1, 1)
- && qFZ(affine._m21 + 1, 1) && qFZ(affine._m22, 1) && qFZ(m_23 + 1, 1)
- && qFZ(affine._dx + 1, 1) && qFZ(affine._dy + 1, 1) && qFZ(m_33, 1);
- #undef qFZ
- }
- inline bool QTransform::isInvertible() const
- {
- return !qFuzzyCompare(determinant() + 1, 1);
- }
- inline bool QTransform::isScaling() const
- {
- return !qFuzzyCompare(affine._m11, 1) ||
- !qFuzzyCompare(affine._m22, 1);
- }
- inline bool QTransform::isRotating() const
- {
- return !qFuzzyCompare(affine._m12 + 1, 1) ||
- !qFuzzyCompare(affine._m21 + 1, 1);
- }
- inline bool QTransform::isTranslating() const
- {
- return !qFuzzyCompare(affine._dx + 1, 1) ||
- !qFuzzyCompare(affine._dy + 1, 1);
- }
- 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)
- {
- 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)
- {
- div = 1/div;
- return operator*=(div);
- }
- inline QTransform &QTransform::operator+=(qreal num)
- {
- 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)
- {
- 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;
- }
- /****** stream functions *******************/
- Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QTransform &);
- Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QTransform &);
- #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