Public Types | Public Member Functions | Static Public Member Functions

QTransform Class Reference

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Detailed Description

Definition at line 65 of file qtransform.h.

#include <qtransform.h>

List of all members.

Public Types
enum   TransformationType {
  TxNone = 0x00, TxTranslate = 0x01, TxScale = 0x02, TxRotate = 0x04,
  TxShear = 0x08, TxProject = 0x10
}

Public Member Functions
  QTransform (Qt::Initialization)
  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)
  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
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)
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 Public Member Functions
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)
static QTransform  fromTranslate (qreal dx, qreal dy)
static QTransform  fromScale (qreal dx, qreal dy)

Member Enumeration Documentation

enum TransformationType
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Enumerator:
TxNone 
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TxTranslate 
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TxScale 
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TxRotate 
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TxShear 
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TxProject 
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Definition at line 68 of file qtransform.h.

                            {
        TxNone      = 0x00,
        TxTranslate = 0x01,
        TxScale     = 0x02,
        TxRotate    = 0x04,
        TxShear     = 0x08,
        TxProject   = 0x10
    };

Constructor & Destructor Documentation

QTransform ( Qt::Initialization  ) [inline, explicit]

Definition at line 77 of file qtransform.h.

: 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 
)
QTransform ( const QMatrix &  mtx ) [explicit]

Member Function Documentation

bool isAffine ( ) const [inline]
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Definition at line 200 of file qtransform.h.

{
    return inline_type() < TxProject;
}
bool isIdentity ( ) const [inline]
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Definition at line 204 of file qtransform.h.

{
    return inline_type() == TxNone;
}
bool isInvertible ( ) const [inline]
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Definition at line 209 of file qtransform.h.

{
    return !qFuzzyIsNull(determinant());
}
bool isScaling ( ) const [inline]
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Definition at line 214 of file qtransform.h.

{
    return type() >= TxScale;
}
bool isRotating ( ) const [inline]
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Definition at line 218 of file qtransform.h.

{
    return inline_type() >= TxRotate;
}
bool isTranslating ( ) const [inline]
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Definition at line 223 of file qtransform.h.

{
    return inline_type() >= TxTranslate;
}
TransformationType type ( ) const
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qreal determinant ( ) const [inline]
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Definition at line 228 of file qtransform.h.

{
    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);
}
qreal det ( ) const [inline]
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Definition at line 233 of file qtransform.h.

{
    return determinant();
}
qreal m11 ( ) const [inline]
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Definition at line 237 of file qtransform.h.

{
    return affine._m11;
}
qreal m12 ( ) const [inline]
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Definition at line 241 of file qtransform.h.

{
    return affine._m12;
}
qreal m13 ( ) const [inline]
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Definition at line 245 of file qtransform.h.

{
    return m_13;
}
qreal m21 ( ) const [inline]
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Definition at line 249 of file qtransform.h.

{
    return affine._m21;
}
qreal m22 ( ) const [inline]
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Definition at line 253 of file qtransform.h.

{
    return affine._m22;
}
qreal m23 ( ) const [inline]
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Definition at line 257 of file qtransform.h.

{
    return m_23;
}
qreal m31 ( ) const [inline]
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Definition at line 261 of file qtransform.h.

{
    return affine._dx;
}
qreal m32 ( ) const [inline]
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Definition at line 265 of file qtransform.h.

{
    return affine._dy;
}
qreal m33 ( ) const [inline]
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Definition at line 269 of file qtransform.h.

{
    return m_33;
}
qreal dx ( ) const [inline]
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Definition at line 273 of file qtransform.h.

{
    return affine._dx;
}
qreal dy ( ) const [inline]
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Definition at line 277 of file qtransform.h.

{
    return affine._dy;
}
void setMatrix ( qreal  m11,
qreal  m12,
qreal  m13,
qreal  m21,
qreal  m22,
qreal  m23,
qreal  m31,
qreal  m32,
qreal  m33 
)
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QTransform inverted ( bool *  invertible = 0 ) const
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QTransform adjoint ( ) const
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QTransform transposed ( ) const
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QTransform& translate ( qreal  dx,
qreal  dy 
)
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QTransform& scale ( qreal  sx,
qreal  sy 
)
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QTransform& shear ( qreal  sh,
qreal  sv 
)
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QTransform& rotate ( qreal  a,
Qt::Axis  axis = Qt::ZAxis 
)
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QTransform& rotateRadians ( qreal  a,
Qt::Axis  axis = Qt::ZAxis 
)
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static bool squareToQuad ( const QPolygonF &  square,
QTransform &  result 
) [static]
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static bool quadToSquare ( const QPolygonF &  quad,
QTransform &  result 
) [static]
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static bool quadToQuad ( const QPolygonF &  one,
const QPolygonF &  two,
QTransform &  result 
) [static]
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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 ( )
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QPoint map ( const QPoint &  p ) const
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QPointF map ( const QPointF &  p ) const
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QLine map ( const QLine &  l ) const
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QLineF map ( const QLineF &  l ) const
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QPolygonF map ( const QPolygonF &  a ) const
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QPolygon map ( const QPolygon &  a ) const
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QRegion map ( const QRegion &  r ) const
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QPainterPath map ( const QPainterPath &  p ) const
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QPolygon mapToPolygon ( const QRect &  r ) const
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QRect mapRect ( const QRect &  ) const
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QRectF mapRect ( const QRectF &  ) const
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void map ( int  x,
int  y,
int *  tx,
int *  ty 
) const
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void map ( qreal  x,
qreal  y,
qreal *  tx,
qreal *  ty 
) const
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const QMatrix& toAffine ( ) const
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QTransform & operator*= ( qreal  div ) [inline]

Definition at line 282 of file qtransform.h.

{
    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;
    if (m_dirty < TxScale)
        m_dirty = TxScale;
    return *this;
}
QTransform & operator/= ( qreal  div ) [inline]

Definition at line 299 of file qtransform.h.

{
    if (div == 0)
        return *this;
    div = 1/div;
    return operator*=(div);
}
QTransform & operator+= ( qreal  div ) [inline]

Definition at line 306 of file qtransform.h.

{
    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;
}
QTransform & operator-= ( qreal  div ) [inline]

Definition at line 322 of file qtransform.h.

{
    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;
}
static QTransform fromTranslate ( qreal  dx,
qreal  dy 
) [static]
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static QTransform fromScale ( qreal  dx,
qreal  dy 
) [static]
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The documentation for this class was generated from the following file:
Generated on Thu Mar 22 2012 18:43:54 by doxygen 1.7.3
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