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

#include <qgsmaptopixel.h>

Public Member Functions
Q_DECL_DEPRECATED	QgsMapToPixel (double mapUnitsPerPixel, double height=0, double ymin=0, double xmin=0)
	QgsMapToPixel (double mapUnitsPerPixel, double xc, double yc, int width, int height, double rotation)
	QgsMapToPixel ()
	~QgsMapToPixel ()
	destructor
int	mapHeight () const
	Return current map height in pixels.
double	mapRotation () const
	Return current map rotation in degrees.
double	mapUnitsPerPixel () const
	Return current map units per pixel.
int	mapWidth () const
	Return current map width in pixels The information is only known if setRotation was used.
void	setMapRotation (double degrees, double cx, double cy)
	Set map rotation in degrees (clockwise)
void	setMapUnitsPerPixel (double mapUnitsPerPixel)
Q_DECL_DEPRECATED void	setParameters (double mapUnitsPerPixel, double xmin, double ymin, double height)
void	setParameters (double mapUnitsPerPixel, double xc, double yc, int width, int height, double rotation)
Q_DECL_DEPRECATED void	setXMinimum (double xmin)
	set minimum x value
Q_DECL_DEPRECATED void	setYMaximum (double yMax)
	Set maximum y value.
Q_DECL_DEPRECATED void	setYMinimum (double ymin)
	Set minimum y value.
QString	showParameters () const
	String representation of the parameters used in the transform.
QgsPoint	toMapCoordinates (int x, int y) const
QgsPoint	toMapCoordinates (QPoint p) const
QgsPoint	toMapCoordinatesF (double x, double y) const
QgsPoint	toMapPoint (double x, double y) const
QgsPoint	transform (const QgsPoint &p) const
void	transform (QgsPoint *p) const
QgsPoint	transform (double x, double y) const
void	transformInPlace (qreal &x, qreal &y) const
template<class T >
void	transformInPlace (QVector< T > &x, QVector< T > &y) const

Detailed Description

Perform transforms between map coordinates and device coordinates.

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

Definition at line 34 of file qgsmaptopixel.h.

Constructor & Destructor Documentation

QgsMapToPixel::QgsMapToPixel	(	double	mapUnitsPerPixel,
		double	height = `0`,
		double	ymin = `0`,
		double	xmin = `0`
	)

Definition at line 59 of file qgsmaptopixel.cpp.

QgsMapToPixel::QgsMapToPixel	(	double	mapUnitsPerPixel,
		double	xc,
		double	yc,
		int	width,
		int	height,
		double	rotation
	)

Definition at line 27 of file qgsmaptopixel.cpp.

QgsMapToPixel::QgsMapToPixel ( )

Constructor

  Use setParameters to fill

Definition at line 46 of file qgsmaptopixel.cpp.

QgsMapToPixel::~QgsMapToPixel ( )

destructor

Definition at line 75 of file qgsmaptopixel.cpp.

Member Function Documentation

int QgsMapToPixel::mapHeight ( ) const

Return current map height in pixels.

Note: added in 2.8

Definition at line 79 of file qgsmaptopixel.cpp.

double QgsMapToPixel::mapRotation ( ) const

Return current map rotation in degrees.

Note: added in 2.8

Definition at line 175 of file qgsmaptopixel.cpp.

double QgsMapToPixel::mapUnitsPerPixel ( ) const

Return current map units per pixel.

Definition at line 157 of file qgsmaptopixel.cpp.

int QgsMapToPixel::mapWidth ( ) const

Return current map width in pixels The information is only known if setRotation was used.

Note: added in 2.8

Definition at line 84 of file qgsmaptopixel.cpp.

void QgsMapToPixel::setMapRotation	(	double	degrees,
		double	cx,
		double	cy
	)

Set map rotation in degrees (clockwise)

Parameters

degrees	clockwise rotation in degrees
cx	X ordinate of map center in geographical units
cy	Y ordinate of map center in geographical units

Note: added in 2.8

Definition at line 162 of file qgsmaptopixel.cpp.

void QgsMapToPixel::setMapUnitsPerPixel ( double mapUnitsPerPixel )

Set map units per pixel

Parameters

mapUnitsPerPixel Map units per pixel

Definition at line 151 of file qgsmaptopixel.cpp.

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

Set parameters for use in transforming coordinates

Parameters

mapUnitsPerPixel	Map units per pixel
xmin	Minimum x value
ymin	Minimum y value
height	Map height, in pixels

Deprecated:: in 2.8, use the version with full parameters

Definition at line 197 of file qgsmaptopixel.cpp.

void QgsMapToPixel::setParameters	(	double	mapUnitsPerPixel,
		double	xc,
		double	yc,
		int	width,
		int	height,
		double	rotation
	)

Set parameters for use in transforming coordinates

Parameters

mapUnitsPerPixel	Map units per pixel
xc	X ordinate of map center, in geographical units
yc	Y ordinate of map center, in geographical units
width	Output width, in pixels
height	Output height, in pixels
rotation	clockwise rotation in degrees

Note: added in 2.8

Definition at line 209 of file qgsmaptopixel.cpp.

void QgsMapToPixel::setXMinimum ( double xmin )

set minimum x value

Definition at line 189 of file qgsmaptopixel.cpp.

Q_DECL_DEPRECATED void QgsMapToPixel::setYMaximum ( double yMax )

inline

Set maximum y value.

Definition at line 146 of file qgsmaptopixel.h.

void QgsMapToPixel::setYMinimum ( double ymin )

Set minimum y value.

Definition at line 181 of file qgsmaptopixel.cpp.

QString QgsMapToPixel::showParameters ( ) const

String representation of the parameters used in the transform.

Definition at line 227 of file qgsmaptopixel.cpp.

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

Definition at line 141 of file qgsmaptopixel.cpp.

QgsPoint QgsMapToPixel::toMapCoordinates ( QPoint p ) const

Transform device coordinates to map (world) coordinates

Parameters

p	Point to be converted to map cooordinates

Returns: QgsPoint in map coorndiates

Definition at line 135 of file qgsmaptopixel.cpp.

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

Transform device coordinates to map (world) coordinates

Definition at line 146 of file qgsmaptopixel.cpp.

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

Definition at line 121 of file qgsmaptopixel.cpp.

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

Definition at line 245 of file qgsmaptopixel.cpp.

void QgsMapToPixel::transform ( QgsPoint * p ) const

Definition at line 255 of file qgsmaptopixel.cpp.

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

Definition at line 239 of file qgsmaptopixel.cpp.

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

Transform 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

Definition at line 267 of file qgsmaptopixel.cpp.

template<class T >

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

inline

Definition at line 95 of file qgsmaptopixel.h.

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

/tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgsmaptopixel.h
/tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgsmaptopixel.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation