source: trunk/src/gui/painting/qtransform.h@ 651

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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>

#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)