Geom::Zoom Class Reference

Combination of a translation and uniform scale. More...

#include <transforms.h>

Inheritance diagram for Geom::Zoom:

Public Member Functions
	Zoom ()=default
	Zoom (Coord s)
	Construct a zoom from a scaling factor.
	Zoom (Point const &t)
	Construct a zoom from a translation.
	Zoom (Translate const &t)
	Zoom (Coord s, Point const &t)
	Construct a zoom from a scaling factor and a translation.
	Zoom (Coord s, Translate const &t)
	operator Affine () const
Zoom &	operator*= (Zoom const &z)
bool	operator== (Zoom const &z) const
Coord	scale () const
void	setScale (Coord s)
Point	translation () const
void	setTranslation (Point const &p)
Zoom	inverse () const
Public Member Functions inherited from Geom::TransformOperations< Zoom >
Affine	operator* (T2 const &t) const

Static Public Member Functions
static Zoom	identity ()
static Zoom	map_rect (Rect const &old_r, Rect const &new_r)
	Zoom between rectangles.

Private Attributes
Coord	_scale = 1
Point	_trans

Friends
class	Point
class	Affine

Detailed Description

Combination of a translation and uniform scale.

The translation part is applied first, then the result is scaled from the new origin. This way when the class is used to accumulate a zoom transform, trans always points to the new origin in original coordinates.

Definition at line 290 of file transforms.h.

Constructor & Destructor Documentation

Zoom() [1/6]

Geom::Zoom::Zoom ( )

default

Referenced by inverse().

Zoom() [2/6]

Geom::Zoom::Zoom ( Coord  s )

inlineexplicit

Construct a zoom from a scaling factor.

Definition at line 298 of file transforms.h.

Zoom() [3/6]

Geom::Zoom::Zoom ( Point const &  t )

inlineexplicit

Construct a zoom from a translation.

Definition at line 300 of file transforms.h.

Zoom() [4/6]

Geom::Zoom::Zoom ( Translate const &  t )

inlineexplicit

Definition at line 301 of file transforms.h.

Zoom() [5/6]

Geom::Zoom::Zoom ( Coord  s, Point const &  t  )

inline

Construct a zoom from a scaling factor and a translation.

Definition at line 303 of file transforms.h.

Zoom() [6/6]

Geom::Zoom::Zoom ( Coord  s, Translate const &  t  )

inline

Definition at line 304 of file transforms.h.

Member Function Documentation

identity()

static Zoom Geom::Zoom::identity ( )

inlinestatic

Definition at line 321 of file transforms.h.

Referenced by Geom::check_transforms().

inverse()

Zoom Geom::Zoom::inverse ( ) const

inline

Definition at line 320 of file transforms.h.

References _scale, _trans, and Zoom().

map_rect()

Zoom Geom::Zoom::map_rect ( Rect const &  old_r, Rect const &  new_r  )

static

Zoom between rectangles.

Given two rectangles, compute a zoom that maps one to the other. Rectangles are assumed to have the same aspect ratio.

Definition at line 46 of file transforms.cpp.

References _scale, _trans, Geom::GenericRect< C >::min(), and Geom::GenericRect< C >::width().

operator Affine()

Geom::Zoom::operator Affine ( ) const

inline

Definition at line 306 of file transforms.h.

References _scale, _trans, Affine, Geom::X, and Geom::Y.

operator*=()

Zoom & Geom::Zoom::operator*= ( Zoom const &  z )

inline

Definition at line 309 of file transforms.h.

References _scale, and _trans.

operator==()

bool Geom::Zoom::operator== ( Zoom const &  z ) const

inline

Definition at line 314 of file transforms.h.

References _scale, and _trans.

scale()

Coord Geom::Zoom::scale ( ) const

inline

Definition at line 316 of file transforms.h.

References _scale.

Referenced by Geom::are_near(), Geom::Circle::operator*=(), and Geom::Ellipse::operator*=().

setScale()

void Geom::Zoom::setScale ( Coord  s )

inline

Definition at line 317 of file transforms.h.

References _scale.

setTranslation()

void Geom::Zoom::setTranslation ( Point const &  p )

inline

Definition at line 319 of file transforms.h.

References _trans.

translation()

Point Geom::Zoom::translation ( ) const

inline

Definition at line 318 of file transforms.h.

References _trans.

Referenced by Geom::are_near().

Friends And Related Symbol Documentation

Affine

friend class Affine

friend

Definition at line 325 of file transforms.h.

Referenced by operator Affine().

Point

friend class Point

friend

Definition at line 324 of file transforms.h.

Member Data Documentation

_scale

Coord Geom::Zoom::_scale = 1

private

Definition at line 293 of file transforms.h.

Referenced by inverse(), map_rect(), operator Affine(), Geom::Affine::operator*=(), Geom::Point::operator*=(), operator*=(), operator==(), scale(), and setScale().

_trans

Point Geom::Zoom::_trans

private

Definition at line 294 of file transforms.h.

Referenced by inverse(), map_rect(), operator Affine(), Geom::Affine::operator*=(), Geom::Point::operator*=(), operator*=(), operator==(), setTranslation(), and translation().

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The documentation for this class was generated from the following files:

• /builds/inkscape/inkscape/src/3rdparty/2geom/include/2geom/transforms.h
• /builds/inkscape/inkscape/src/3rdparty/2geom/src/2geom/transforms.cpp