A scale map. More...

#include <qwt_scale_map.h>

Public Member Functions
double	invTransform (double p) const
bool	isInverting () const
QwtScaleMap &	operator= (const QwtScaleMap &)
	Assignment operator.
double	p1 () const
double	p2 () const
double	pDist () const
	QwtScaleMap ()
	Constructor.
	QwtScaleMap (const QwtScaleMap &)
	Copy constructor.
double	s1 () const
double	s2 () const
double	sDist () const
void	setPaintInterval (double p1, double p2)
	Specify the borders of the paint device interval.
void	setScaleInterval (double s1, double s2)
	Specify the borders of the scale interval.
void	setTransformation (QwtTransform *)
double	transform (double s) const
const QwtTransform *	transformation () const
	Get the transformation.
	~QwtScaleMap ()
Static Public Member Functions
static QRectF	invTransform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &)
static QPointF	invTransform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &)
static QRectF	transform (const QwtScaleMap &, const QwtScaleMap &, const QRectF &)
static QPointF	transform (const QwtScaleMap &, const QwtScaleMap &, const QPointF &)
Private Member Functions
void	updateFactor ()
Private Attributes
double	d_cnv
double	d_p1
double	d_p2
double	d_s1
double	d_s2
QwtTransform *	d_transform
double	d_ts1

Detailed Description

A scale map.

QwtScaleMap offers transformations from the coordinate system of a scale into the linear coordinate system of a paint device and vice versa.

Definition at line 30 of file qwt_scale_map.h.

Constructor & Destructor Documentation

QwtScaleMap::QwtScaleMap ( )

Constructor.

The scale and paint device intervals are both set to [0,1].

Definition at line 20 of file qwt_scale_map.cpp.

QwtScaleMap::QwtScaleMap ( const QwtScaleMap & other )

Copy constructor.

Definition at line 32 of file qwt_scale_map.cpp.

QwtScaleMap::~QwtScaleMap ( )

Destructor

Definition at line 48 of file qwt_scale_map.cpp.

Member Function Documentation

double QwtScaleMap::invTransform ( double p ) const [inline]

Transform an paint device value into a value in the interval of the scale.

Parameters:

p	Value relative to the coordinates of the paint device

Returns:: Transformed value

See also:: transform()

Definition at line 156 of file qwt_scale_map.h.

QRectF QwtScaleMap::invTransform	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	rect
	)		`[static]`

Transform a rectangle from paint to scale coordinates

Parameters:

xMap	X map
yMap	Y map
rect	Rectangle in paint coordinates

Returns:: Rectangle in scale coordinates

See also:: transform()

Definition at line 223 of file qwt_scale_map.cpp.

QPointF QwtScaleMap::invTransform	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QPointF &	pos
	)		`[static]`

Transform a rectangle from paint to scale coordinates

Parameters:

xMap	X map
yMap	Y map
pos	Position in paint coordinates

Returns:: Position in scale coordinates

See also:: transform()

Definition at line 186 of file qwt_scale_map.cpp.

bool QwtScaleMap::isInverting ( ) const [inline]

Returns:: True, when ( p1() < p2() ) != ( s1() < s2() )

Definition at line 166 of file qwt_scale_map.h.

QwtScaleMap & QwtScaleMap::operator= ( const QwtScaleMap & other )

Assignment operator.

Definition at line 54 of file qwt_scale_map.cpp.

double QwtScaleMap::p1 ( ) const [inline]

Returns:: First border of the paint interval

Definition at line 101 of file qwt_scale_map.h.

double QwtScaleMap::p2 ( ) const [inline]

Returns:: Second border of the paint interval

Definition at line 109 of file qwt_scale_map.h.

double QwtScaleMap::pDist ( ) const [inline]

Returns:: qwtAbs(p2() - p1())

Definition at line 117 of file qwt_scale_map.h.

double QwtScaleMap::s1 ( ) const [inline]

Returns:: First border of the scale interval

Definition at line 85 of file qwt_scale_map.h.

double QwtScaleMap::s2 ( ) const [inline]

Returns:: Second border of the scale interval

Definition at line 93 of file qwt_scale_map.h.

double QwtScaleMap::sDist ( ) const [inline]

Returns:: qwtAbs(s2() - s1())

Definition at line 125 of file qwt_scale_map.h.

void QwtScaleMap::setPaintInterval	(	double	p1,
		double	p2
	)

Specify the borders of the paint device interval.

Parameters:

p1	first border
p2	second border

Definition at line 118 of file qwt_scale_map.cpp.

void QwtScaleMap::setScaleInterval	(	double	s1,
		double	s2
	)

Specify the borders of the scale interval.

Parameters:

s1	first border
s2	second border

Warning:: scales might be aligned to transformation depending boundaries

Definition at line 99 of file qwt_scale_map.cpp.

void QwtScaleMap::setTransformation ( QwtTransform * transform )

Initialize the map with a transformation

Definition at line 75 of file qwt_scale_map.cpp.

double QwtScaleMap::transform ( double s ) const [inline]

Transform a point related to the scale interval into an point related to the interval of the paint device

Parameters:

s	Value relative to the coordinates of the scale

Returns:: Transformed value

See also:: invTransform()

Definition at line 139 of file qwt_scale_map.h.

QRectF QwtScaleMap::transform	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QRectF &	rect
	)		`[static]`

Transform a rectangle from scale to paint coordinates

Parameters:

xMap	X map
yMap	Y map
rect	Rectangle in scale coordinates

Returns:: Rectangle in paint coordinates

See also:: invTransform()

Definition at line 152 of file qwt_scale_map.cpp.

QPointF QwtScaleMap::transform	(	const QwtScaleMap &	xMap,
		const QwtScaleMap &	yMap,
		const QPointF &	pos
	)		`[static]`

Transform a point from scale to paint coordinates

Parameters:

xMap	X map
yMap	Y map
pos	Position in scale coordinates

Returns:: Position in paint coordinates

See also:: invTransform()

Definition at line 205 of file qwt_scale_map.cpp.

const QwtTransform * QwtScaleMap::transformation ( ) const

Get the transformation.

Definition at line 87 of file qwt_scale_map.cpp.

void QwtScaleMap::updateFactor ( ) [private]

Definition at line 126 of file qwt_scale_map.cpp.

Member Data Documentation

double QwtScaleMap::d_cnv [private]

Definition at line 76 of file qwt_scale_map.h.

double QwtScaleMap::d_p1 [private]

Definition at line 74 of file qwt_scale_map.h.

double QwtScaleMap::d_p2 [private]

Definition at line 74 of file qwt_scale_map.h.

double QwtScaleMap::d_s1 [private]

Definition at line 73 of file qwt_scale_map.h.

double QwtScaleMap::d_s2 [private]

Definition at line 73 of file qwt_scale_map.h.

QwtTransform* QwtScaleMap::d_transform [private]

Definition at line 79 of file qwt_scale_map.h.

double QwtScaleMap::d_ts1 [private]

Definition at line 77 of file qwt_scale_map.h.

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

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation