QgsMapToPixel Class Reference

Perform transforms between map coordinates and device coordinates. More...

#include <qgsmaptopixel.h>

Public Member Functions
	QgsMapToPixel (double mapUnitsPerPixel=0, double ymax=0, double ymin=0, double xmin=0)
	~QgsMapToPixel ()
	destructor
QgsPoint	transform (const QgsPoint &p) const
void	transform (QgsPoint *p) const
QgsPoint	transform (double x, double y) const
void	transformInPlace (double &x, double &y) const
void	transformInPlace (QVector< double > &x, QVector< double > &y) const
QgsPoint	toMapCoordinates (int x, int y) const
QgsPoint	toMapCoordinatesF (double x, double y) const
QgsPoint	toMapCoordinates (QPoint p) const
QgsPoint	toMapPoint (double x, double y) const
void	setMapUnitsPerPixel (double mapUnitsPerPixel)
double	mapUnitsPerPixel () const
	Return current map units per pixel.
void	setYMaximum (double ymax)
	Set maximum y value.
void	setYMinimum (double ymin)
	Set minimum y value.
void	setXMinimum (double xmin)
	set minimum x value
void	setParameters (double mapUnitsPerPixel, double xmin, double ymin, double ymax)
QString	showParameters ()
	String representation of the parameters used in the transform.

Detailed Description

Perform transforms between map coordinates and device coordinates.

This class can convert device coordinates to map coordinates and vice versa.

Constructor & Destructor Documentation

QgsMapToPixel::QgsMapToPixel	(	double	mapUnitsPerPixel = 0,
		double	ymax = 0,
		double	ymin = 0,
		double	xmin = 0
	)

QgsMapToPixel::~QgsMapToPixel

(

)

destructor

Member Function Documentation

double QgsMapToPixel::mapUnitsPerPixel

(

)

const

Return current map units per pixel.

void QgsMapToPixel::setMapUnitsPerPixel

(

double

mapUnitsPerPixel

)

Set map units per pixel

Parameters

mapUnitsPerPixel

Map units per pixel

void QgsMapToPixel::setParameters	(	double	mapUnitsPerPixel,
		double	xmin,
		double	ymin,
		double	ymax
	)

Set parameters for use in transforming coordinates

Parameters

mapUnitsPerPixel	Map units per pixel
xmin	Minimum x value
ymin	Minimum y value
ymax	Maximum y value

void QgsMapToPixel::setXMinimum

(

double

xmin

)

set minimum x value

void QgsMapToPixel::setYMaximum

(

double

ymax

)

Set maximum y value.

void QgsMapToPixel::setYMinimum

(

double

ymin

)

Set minimum y value.

QString QgsMapToPixel::showParameters

(

)

String representation of the parameters used in the transform.

QgsPoint QgsMapToPixel::toMapCoordinates	(	int	x,
		int	y
	)		const

QgsPoint QgsMapToPixel::toMapCoordinates

(

QPoint

p

)

const

Tranform device coordinates to map (world) coordinates

Parameters

p	Point to be converted to map cooordinates

Returns

QgsPoint in map coorndiates

QgsPoint QgsMapToPixel::toMapCoordinatesF	(	double	x,
		double	y
	)		const

Transform device coordinates to map (world) coordinates

QgsPoint QgsMapToPixel::toMapPoint	(	double	x,
		double	y
	)		const

QgsPoint QgsMapToPixel::transform

(

const QgsPoint &

p

)

const

Transform the point from map (world) coordinates to device coordinates

Parameters

p	Point to transform

Returns

QgsPoint in device coordinates

void QgsMapToPixel::transform

(

QgsPoint *

p

)

const

QgsPoint QgsMapToPixel::transform	(	double	x,
		double	y
	)		const

Transform the point specified by x,y from map (world) coordinates to device coordinates

Parameters

x	x cordinate o point to transform
y	y coordinate of point to transform

Returns

QgsPoint in device coordinates

void QgsMapToPixel::transformInPlace	(	double &	x,
		double &	y
	)		const

Tranform device coordinates to map (world) coordinates

Parameters

x	x coordinate of point to be converted to map cooordinates
y	y coordinate of point to be converted to map cooordinates

Returns

QgsPoint in map coordinates

void QgsMapToPixel::transformInPlace	(	QVector< double > &	x,
		QVector< double > &	y
	)		const

---

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

• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsmaptopixel.h
• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsmaptopixel.cpp