**The following class members are obsolete.** They are provided to keep old source code working. We strongly advise against using them in new code.

QMatrix | combinedMatrix () const (obsolete) |

const QMatrix & | deviceMatrix () const (obsolete) |

void | drawRoundRect ( const QRectF & r, int xRnd = 25, int yRnd = 25 ) (obsolete) |

void | drawRoundRect ( const QRect & r, int xRnd = 25, int yRnd = 25 ) (obsolete) |

void | drawRoundRect ( int x, int y, int w, int h, int xRnd = 25, int yRnd = 25 ) (obsolete) |

const QMatrix & | matrix () const (obsolete) |

bool | matrixEnabled () const (obsolete) |

void | resetMatrix () (obsolete) |

void | setMatrix ( const QMatrix & matrix, bool combine = false ) (obsolete) |

void | setMatrixEnabled ( bool enable ) (obsolete) |

void | setWorldMatrix ( const QMatrix & matrix, bool combine = false ) (obsolete) |

const QMatrix & | worldMatrix () const (obsolete) |

QPaintDevice * | redirected ( const QPaintDevice * device, QPoint * offset = 0 ) (obsolete) |

void | restoreRedirected ( const QPaintDevice * device ) (obsolete) |

void | setRedirected ( const QPaintDevice * device, QPaintDevice * replacement, const QPoint & offset = QPoint() ) (obsolete) |

Returns the transformation matrix combining the current window/viewport and world transformation.

It is advisable to use combinedTransform() instead of this function to preserve the properties of perspective transformations.

This function was introduced in Qt 4.2.

**See also **setWorldTransform(), setWindow(), and setViewport().

Returns the matrix that transforms from logical coordinates to device coordinates of the platform dependent paint device.

**Note:** It is advisable to use deviceTransform() instead of this function to preserve the properties of perspective transformations.

This function is *only* needed when using platform painting commands on the platform dependent handle (Qt::HANDLE), and the platform does not do transformations nativly.

The QPaintEngine::PaintEngineFeature enum can be queried to determine whether the platform performs the transformations or not.

**See also **worldMatrix() and QPaintEngine::hasFeature().

Draws a rectangle *r* with rounded corners.

The *xRnd* and *yRnd* arguments specify how rounded the corners should be. 0 is angled corners, 99 is maximum roundedness.

A filled rectangle has a size of r.size(). A stroked rectangle has a size of r.size() plus the pen width.

**See also **drawRoundedRect().

This is an overloaded function.

Draws the rectangle *r* with rounded corners.

This is an overloaded function.

Draws the rectangle *x*, *y*, *w*, *h* with rounded corners.

Use worldTransform() instead.

**See also **setMatrix() and worldTransform().

Use worldMatrixEnabled() instead

**See also **setMatrixEnabled() and worldMatrixEnabled().

Using QWidget::render() obsoletes the use of this function.

Returns the replacement for given *device*. The optional out parameter *offset* returns the offset within the replaced device.

**Warning:** Making use of redirections in the QPainter API implies that QPainter::begin() and QPaintDevice destructors need to hold a mutex for a short period. This can impact performance. Use of QWidget::render is strongly encouraged.

**Note:** This function is thread-safe.

**See also **setRedirected() and restoreRedirected().

Resets any transformations that were made using translate(), scale(), shear(), rotate(), setWorldMatrix(), setViewport() and setWindow().

It is advisable to use resetTransform() instead of this function to preserve the properties of perspective transformations.

**See also **Coordinate Transformations.

Using QWidget::render() obsoletes the use of this function.

Restores the previous redirection for the given *device* after a call to setRedirected().

**Warning:** Making use of redirections in the QPainter API implies that QPainter::begin() and QPaintDevice destructors need to hold a mutex for a short period. This can impact performance. Use of QWidget::render is strongly encouraged.

**Note:** This function is thread-safe.

**See also **redirected().

Use setWorldTransform() instead.

**See also **matrix() and setWorldTransform().

Use setWorldMatrixEnabled() instead.

**See also **matrixEnabled() and setWorldMatrixEnabled().

Please use QWidget::render() instead.

Redirects all paint commands for the given paint *device*, to the *replacement* device. The optional point *offset* defines an offset within the source device.

The redirection will not be effective until the begin() function has been called; make sure to call end() for the given *device*'s painter (if any) before redirecting. Call restoreRedirected() to restore the previous redirection.

**Warning:** Making use of redirections in the QPainter API implies that QPainter::begin() and QPaintDevice destructors need to hold a mutex for a short period. This can impact performance. Use of QWidget::render is strongly encouraged.

**Note:** This function is thread-safe.

**See also **redirected() and restoreRedirected().

Sets the transformation matrix to *matrix* and enables transformations.

**Note:** It is advisable to use setWorldTransform() instead of this function to preserve the properties of perspective transformations.

If *combine* is true, then *matrix* is combined with the current transformation matrix; otherwise *matrix* replaces the current transformation matrix.

If *matrix* is the identity matrix and *combine* is false, this function calls setWorldMatrixEnabled(false). (The identity matrix is the matrix where QMatrix::m11() and QMatrix::m22() are 1.0 and the rest are 0.0.)

The following functions can transform the coordinate system without using a QMatrix:

They operate on the painter's worldMatrix() and are implemented like this:

void QPainter::rotate(qreal angle) { QMatrix matrix; matrix.rotate(angle); setWorldMatrix(matrix, true); }

Note that when using setWorldMatrix() function you should always have *combine* be true when you are drawing into a QPicture. Otherwise it may not be possible to replay the picture with additional transformations; using the translate(), scale(), etc. convenience functions is safe.

For more information about the coordinate system, transformations and window-viewport conversion, see Coordinate System.

This function was introduced in Qt 4.2.

**See also **worldMatrix(), setWorldTransform(), and QTransform.

Returns the world transformation matrix.

It is advisable to use worldTransform() because worldMatrix() does not preserve the properties of perspective transformations.

This function was introduced in Qt 4.2.

**See also **setWorldMatrix(), Coordinate Transformations, and Coordinate System.