#include <QMetaEnum>
#include <cfloat>
#include <memory>
#include <cmath>
#include "qgstolerance.h"
#include "qgis_core.h"
#include "qgis_sip.h"

Include dependency graph for qgis.h:

Classes
class	Qgis
	The Qgis class provides global constants for use throughout the application. More...

class	QgsSignalBlocker< Object >
	RAII signal blocking class. More...

Macros
#define	cast_to_fptr(f) f

#define	FALLTHROUGH

#define	MAYBE_UNUSED

#define	NODISCARD Q_REQUIRED_RESULT

#define	Q_NOWARN_DEPRECATED_POP

#define	Q_NOWARN_DEPRECATED_PUSH

#define	Q_NOWARN_UNREACHABLE_POP

#define	Q_NOWARN_UNREACHABLE_PUSH

#define	QGISEXTERN extern "C"

Typedefs
typedef unsigned long long	qgssize
	Qgssize is used instead of size_t, because size_t is stdlib type, unknown by SIP, and it would be hard to define size_t correctly in SIP. More...

typedef QMap< QString, QString >	QgsStringMap

Functions
void CORE_EXPORT *	qgsCalloc (size_t nmemb, size_t size)
	Allocates memory for an array of nmemb elements of size bytes each and returns a pointer to the allocated memory. More...

bool	qgsDoubleNear (double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
	Compare two doubles (but allow some difference) More...

bool	qgsDoubleNearSig (double a, double b, int significantDigits=10)
	Compare two doubles using specified number of significant digits. More...

QString	qgsDoubleToString (double a, int precision=17)
	Returns a string representation of a double. More...

template<class T >
T	qgsEnumKeyToValue (const QString &key, const T &defaultValue)
	Returns the value corresponding to the given key of an enum. More...

template<class T >
const QMap< T, QString >	qgsEnumMap ()
	Returns a map of all enum entries. More...

template<class T >
QString	qgsEnumValueToKey (const T &value)
	Returns the value for the given key of an enum. More...

bool	qgsFloatNear (float a, float b, float epsilon=4 *FLT_EPSILON)
	Compare two floats (but allow some difference) More...

void CORE_EXPORT	qgsFree (void *ptr)
	Frees the memory space pointed to by ptr. More...

void CORE_EXPORT *	qgsMalloc (size_t size)
	Allocates size bytes and returns a pointer to the allocated memory. More...

CORE_EXPORT double	qgsPermissiveToDouble (QString string, bool &ok)
	Converts a string to a double in a permissive way, e.g., allowing for incorrect numbers of digits between thousand separators. More...

CORE_EXPORT int	qgsPermissiveToInt (QString string, bool &ok)
	Converts a string to an integer in a permissive way, e.g., allowing for incorrect numbers of digits between thousand separators. More...

CORE_EXPORT qlonglong	qgsPermissiveToLongLong (QString string, bool &ok)
	Converts a string to an qlonglong in a permissive way, e.g., allowing for incorrect numbers of digits between thousand separators. More...

double	qgsRound (double number, int places)
	Returns a double number, rounded (as close as possible) to the specified number of places. More...

CORE_EXPORT bool	qgsVariantEqual (const QVariant &lhs, const QVariant &rhs)
	Compares two QVariant values and returns whether they are equal, two NULL values are always treated as equal and 0 is not treated as equal with NULL. More...

CORE_EXPORT bool	qgsVariantGreaterThan (const QVariant &lhs, const QVariant &rhs)
	Compares two QVariant values and returns whether the first is greater than the second. More...

CORE_EXPORT bool	qgsVariantLessThan (const QVariant &lhs, const QVariant &rhs)
	Compares two QVariant values and returns whether the first is less than the second. More...

CORE_EXPORT QString	qgsVsiPrefix (const QString &path)

CORE_EXPORT uint	qHash (const QVariant &variant)
	Hash for QVariant. More...

template<class Object >
QgsSignalBlocker< Object >	whileBlocking (Object *object)
	Temporarily blocks signals from a QObject while calling a single method from the object. More...

Variables
const double	DEFAULT_LINE_WIDTH = 0.26

const double	DEFAULT_POINT_SIZE = 2.0
	Magic number that determines the default point size for point symbols. More...

const double	DEFAULT_SEGMENT_EPSILON = 1e-8
	Default snapping tolerance for segments. More...

CORE_EXPORT const QString	GEO_EPSG_CRS_AUTHID
	Geographic coord sys from EPSG authority. More...

const long	GEO_EPSG_CRS_ID = 4326
	Magic number for a geographic coord sys in EpsgCrsId ID format. More...

CORE_EXPORT const QString	GEO_NONE
	Constant that holds the string representation for "No ellips/No CRS". More...

const long	GEOCRS_ID = 3452
	Magic number for a geographic coord sys in QGIS srs.db tbl_srs.srs_id. More...

CORE_EXPORT const QString	GEOPROJ4
	PROJ4 string that represents a geographic coord sys. More...

const long	GEOSRID = 4326
	Magic number for a geographic coord sys in POSTGIS SRID. More...

CORE_EXPORT const QString	GEOWKT
	Wkt string that represents a geographic coord sys. More...

CORE_EXPORT const QString	PROJECT_SCALES

const int	USER_CRS_START_ID = 100000
	Magick number that determines whether a projection crsid is a system (srs.db) or user (~/.qgis.qgis.db) defined projection. More...

Macro Definition Documentation

◆ cast_to_fptr

#define cast_to_fptr ( f ) f

Definition at line 173 of file qgis.h.

◆ FALLTHROUGH

#define FALLTHROUGH

Definition at line 681 of file qgis.h.

◆ MAYBE_UNUSED

#define MAYBE_UNUSED

Definition at line 716 of file qgis.h.

◆ NODISCARD

#define NODISCARD Q_REQUIRED_RESULT

Definition at line 700 of file qgis.h.

◆ Q_NOWARN_DEPRECATED_POP

#define Q_NOWARN_DEPRECATED_POP

Definition at line 650 of file qgis.h.

◆ Q_NOWARN_DEPRECATED_PUSH

#define Q_NOWARN_DEPRECATED_PUSH

Definition at line 649 of file qgis.h.

◆ Q_NOWARN_UNREACHABLE_POP

#define Q_NOWARN_UNREACHABLE_POP

Definition at line 652 of file qgis.h.

◆ Q_NOWARN_UNREACHABLE_PUSH

#define Q_NOWARN_UNREACHABLE_PUSH

Definition at line 651 of file qgis.h.

◆ QGISEXTERN

#define QGISEXTERN extern "C"

Definition at line 668 of file qgis.h.

Typedef Documentation

◆ qgssize

typedef unsigned long long qgssize

Qgssize is used instead of size_t, because size_t is stdlib type, unknown by SIP, and it would be hard to define size_t correctly in SIP.

Currently used "unsigned long long" was introduced in C++11 (2011) but it was supported already before C++11 on common platforms. "unsigned long long int" gives syntax error in SIP. KEEP IN SYNC WITH qgssize defined in SIP!

Definition at line 621 of file qgis.h.

◆ QgsStringMap

typedef QMap<QString, QString> QgsStringMap

Definition at line 612 of file qgis.h.

Function Documentation

◆ qgsCalloc()

void CORE_EXPORT* qgsCalloc	(	size_t	nmemb,
		size_t	size
	)

Allocates memory for an array of nmemb elements of size bytes each and returns a pointer to the allocated memory.

Works like C calloc() but prints debug message by QgsLogger if allocation fails.

Parameters

nmemb	number of elements
size	size of element in bytes

Definition at line 134 of file qgis.cpp.

◆ qgsDoubleNear()

bool qgsDoubleNear	(	double	a,
		double	b,
		double	epsilon = `4 * std::numeric_limits<double>::epsilon()`
	)

inline

Compare two doubles (but allow some difference)

Parameters

a	first double
b	second double
epsilon	maximum difference allowable between doubles

Definition at line 280 of file qgis.h.

◆ qgsDoubleNearSig()

bool qgsDoubleNearSig	(	double	a,
		double	b,
		int	significantDigits = `10`
	)

inline

Compare two doubles using specified number of significant digits.

Definition at line 305 of file qgis.h.

◆ qgsDoubleToString()

QString qgsDoubleToString	(	double	a,
		int	precision = `17`
	)

inline

Returns a string representation of a double.

Parameters

a	double value
precision	number of decimal places to retain

Definition at line 240 of file qgis.h.

◆ qgsEnumKeyToValue()

template<class T >

T qgsEnumKeyToValue	(	const QString &	key,
		const T &	defaultValue
	)

Returns the value corresponding to the given key of an enum.

If the key is invalid, it will return the defaultValue.

Since: QGIS 3.6

Definition at line 463 of file qgis.h.

◆ qgsEnumMap()

template<class T >

const QMap<T, QString> qgsEnumMap ( )

Returns a map of all enum entries.

The map has the enum values (int) as keys and the enum keys (QString) as values. The enum must have been declared using Q_ENUM or Q_FLAG.

Definition at line 434 of file qgis.h.

◆ qgsEnumValueToKey()

template<class T >

QString qgsEnumValueToKey ( const T & value )

Returns the value for the given key of an enum.

Since: QGIS 3.6

Definition at line 451 of file qgis.h.

◆ qgsFloatNear()

bool qgsFloatNear	(	float	a,
		float	b,
		float	epsilon = `4 * FLT_EPSILON`
	)

inline

Compare two floats (but allow some difference)

Parameters

a	first float
b	second float
epsilon	maximum difference allowable between floats

Definition at line 295 of file qgis.h.

◆ qgsFree()

void CORE_EXPORT qgsFree ( void * ptr )

Frees the memory space pointed to by ptr.

Works like C free().

Parameters

ptr	pointer to memory space

Definition at line 149 of file qgis.cpp.

◆ qgsMalloc()

void CORE_EXPORT* qgsMalloc ( size_t size )

Allocates size bytes and returns a pointer to the allocated memory.

Works like C malloc() but prints debug message by QgsLogger if allocation fails.

Parameters

size	size in bytes

Definition at line 119 of file qgis.cpp.

◆ qgsPermissiveToDouble()

CORE_EXPORT double qgsPermissiveToDouble	(	QString	string,
		bool &	ok
	)

Converts a string to a double in a permissive way, e.g., allowing for incorrect numbers of digits between thousand separators.

Parameters

string	string to convert
ok	will be set to `true` if conversion was successful

Returns: string converted to double if possible

See also: permissiveToInt

Since: QGIS 2.9

Definition at line 98 of file qgis.cpp.

◆ qgsPermissiveToInt()

CORE_EXPORT int qgsPermissiveToInt	(	QString	string,
		bool &	ok
	)

Converts a string to an integer in a permissive way, e.g., allowing for incorrect numbers of digits between thousand separators.

Parameters

string	string to convert
ok	will be set to `true` if conversion was successful

Returns: string converted to int if possible

See also: permissiveToDouble

Since: QGIS 2.9

Definition at line 105 of file qgis.cpp.

◆ qgsPermissiveToLongLong()

CORE_EXPORT qlonglong qgsPermissiveToLongLong	(	QString	string,
		bool &	ok
	)

Converts a string to an qlonglong in a permissive way, e.g., allowing for incorrect numbers of digits between thousand separators.

Parameters

string	string to convert
ok	will be set to `true` if conversion was successful

Returns: string converted to int if possible

See also: permissiveToInt

Since: QGIS 3.4

Definition at line 112 of file qgis.cpp.

◆ qgsRound()

double qgsRound	(	double	number,
		int	places
	)

inline

Returns a double number, rounded (as close as possible) to the specified number of places.

Since: QGIS 3.0

Definition at line 328 of file qgis.h.

◆ qgsVariantEqual()

CORE_EXPORT bool qgsVariantEqual	(	const QVariant &	lhs,
		const QVariant &	rhs
	)

Compares two QVariant values and returns whether they are equal, two NULL values are always treated as equal and 0 is not treated as equal with NULL.

Parameters

lhs	first value
rhs	second value

Returns: true if values are equal

Definition at line 298 of file qgis.cpp.

◆ qgsVariantGreaterThan()

CORE_EXPORT bool qgsVariantGreaterThan	(	const QVariant &	lhs,
		const QVariant &	rhs
	)

Compares two QVariant values and returns whether the first is greater than the second.

Useful for sorting lists of variants, correctly handling sorting of the various QVariant data types (such as strings, numeric values, dates and times)

See also: qgsVariantLessThan()

Definition at line 222 of file qgis.cpp.

◆ qgsVariantLessThan()

CORE_EXPORT bool qgsVariantLessThan	(	const QVariant &	lhs,
		const QVariant &	rhs
	)

Compares two QVariant values and returns whether the first is less than the second.

Useful for sorting lists of variants, correctly handling sorting of the various QVariant data types (such as strings, numeric values, dates and times)

Invalid < NULL < Values

See also: qgsVariantGreaterThan()

Definition at line 154 of file qgis.cpp.

◆ qgsVsiPrefix()

CORE_EXPORT QString qgsVsiPrefix ( const QString & path )

Definition at line 227 of file qgis.cpp.

◆ qHash()

CORE_EXPORT uint qHash ( const QVariant & variant )

Hash for QVariant.

Definition at line 252 of file qgis.cpp.

◆ whileBlocking()

template<class Object >

QgsSignalBlocker<Object> whileBlocking ( Object * object )

inline

Temporarily blocks signals from a QObject while calling a single method from the object.

Usage: whileBlocking( checkBox )->setChecked( true ); whileBlocking( spinBox )->setValue( 50 );

No signals will be emitted when calling these methods.

See also: QgsSignalBlocker

Note: not available in Python bindings

Since: QGIS 2.16

Definition at line 227 of file qgis.h.

Variable Documentation

◆ DEFAULT_LINE_WIDTH

const double DEFAULT_LINE_WIDTH = 0.26

Definition at line 595 of file qgis.h.

◆ DEFAULT_POINT_SIZE

const double DEFAULT_POINT_SIZE = 2.0

Magic number that determines the default point size for point symbols.

Definition at line 594 of file qgis.h.

◆ DEFAULT_SEGMENT_EPSILON

const double DEFAULT_SEGMENT_EPSILON = 1e-8

Default snapping tolerance for segments.

Definition at line 598 of file qgis.h.

◆ GEO_EPSG_CRS_AUTHID

CORE_EXPORT const QString GEO_EPSG_CRS_AUTHID

Geographic coord sys from EPSG authority.

Definition at line 70 of file qgis.cpp.

◆ GEO_EPSG_CRS_ID

const long GEO_EPSG_CRS_ID = 4326

Magic number for a geographic coord sys in EpsgCrsId ID format.

Definition at line 577 of file qgis.h.

◆ GEO_NONE

CORE_EXPORT const QString GEO_NONE

Constant that holds the string representation for "No ellips/No CRS".

Definition at line 72 of file qgis.cpp.

◆ GEOCRS_ID

const long GEOCRS_ID = 3452

Magic number for a geographic coord sys in QGIS srs.db tbl_srs.srs_id.

Definition at line 575 of file qgis.h.

◆ GEOPROJ4

CORE_EXPORT const QString GEOPROJ4

PROJ4 string that represents a geographic coord sys.

Definition at line 51 of file qgis.cpp.

◆ GEOSRID

const long GEOSRID = 4326

Magic number for a geographic coord sys in POSTGIS SRID.

Definition at line 573 of file qgis.h.

◆ GEOWKT

CORE_EXPORT const QString GEOWKT

Wkt string that represents a geographic coord sys.

Since: QGIS GEOWkt

Definition at line 53 of file qgis.cpp.

◆ PROJECT_SCALES

CORE_EXPORT const QString PROJECT_SCALES

Definition at line 66 of file qgis.cpp.

◆ USER_CRS_START_ID

const int USER_CRS_START_ID = 100000

Magick number that determines whether a projection crsid is a system (srs.db) or user (~/.qgis.qgis.db) defined projection.

Definition at line 584 of file qgis.h.

Classes

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ cast_to_fptr

◆ FALLTHROUGH

◆ MAYBE_UNUSED

◆ NODISCARD

◆ Q_NOWARN_DEPRECATED_POP

◆ Q_NOWARN_DEPRECATED_PUSH

◆ Q_NOWARN_UNREACHABLE_POP

◆ Q_NOWARN_UNREACHABLE_PUSH

◆ QGISEXTERN

Typedef Documentation

◆ qgssize

◆ QgsStringMap

Function Documentation

◆ qgsCalloc()

◆ qgsDoubleNear()

◆ qgsDoubleNearSig()

◆ qgsDoubleToString()

◆ qgsEnumKeyToValue()

◆ qgsEnumMap()

◆ qgsEnumValueToKey()

◆ qgsFloatNear()

◆ qgsFree()

◆ qgsMalloc()

◆ qgsPermissiveToDouble()

◆ qgsPermissiveToInt()

◆ qgsPermissiveToLongLong()

◆ qgsRound()

◆ qgsVariantEqual()

◆ qgsVariantGreaterThan()

◆ qgsVariantLessThan()

◆ qgsVsiPrefix()

◆ qHash()

◆ whileBlocking()

Variable Documentation

◆ DEFAULT_LINE_WIDTH

◆ DEFAULT_POINT_SIZE

◆ DEFAULT_SEGMENT_EPSILON

◆ GEO_EPSG_CRS_AUTHID

◆ GEO_EPSG_CRS_ID

◆ GEO_NONE

◆ GEOCRS_ID

◆ GEOPROJ4

◆ GEOSRID

◆ GEOWKT

◆ PROJECT_SCALES

◆ USER_CRS_START_ID