src/core/qgis.h File Reference

#include <QEvent>
#include <QString>
#include <cfloat>
#include <cmath>
#include <qnumeric.h>

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Classes
class	QGis
	The QGis class provides global constants for use throughout the application. More...
Functions
bool	doubleNear (double a, double b, double epsilon=4 *DBL_EPSILON)
Variables
void(*)()	cast_to_fptr (void *p)
const QString	GEOWkt = " AUTHORITY[\"EPSG\",4326]]"
	Wkt string that represents a geographic coord sys.
const QString	GEOPROJ4 = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"
	PROJ4 string that represents a geographic coord sys.
const long	GEOSRID = 4326
	Magic number for a geographic coord sys in POSTGIS SRID.
const long	GEOCRS_ID = 3452
	Magic number for a geographic coord sys in QGIS srs.db tbl_srs.srs_id.
const long	GEO_EPSG_CRS_ID = 4326
	Magic number for a geographic coord sys in EpsgCrsId ID format.
const QString	GEO_EPSG_CRS_AUTHID = "EPSG:4326"
	Geographic coord sys from EPSG authority.
const int	PROJ_PREFIX_LEN = 6
	The length of the string "+proj=".
const int	ELLPS_PREFIX_LEN = 7
	The length of the string "+ellps=".
const int	LAT_PREFIX_LEN = 7
	The length of the string "+lat_1=".
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.
const double	MINIMUM_POINT_SIZE = 0.1
	Magic number that determines the minimum allowable point size for point symbols.
const double	DEFAULT_POINT_SIZE = 2.0
	Magic number that determines the default point size for point symbols.
const double	DEFAULT_LINE_WIDTH = 0.26

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Function Documentation

bool doubleNear	(	double	a,
		double	b,
		double	epsilon = 4 * DBL_EPSILON
	)		[inline]

Definition at line 129 of file qgis.h.

Referenced by QgsClipper::connectSeparatedLines(), QgsClipper::intersectRect(), QgsSVGFillSymbolLayer::renderPolygon(), QgsCoordinateReferenceSystem::setMapUnits(), QgsPoint::sqrDistToSegment(), QgsRasterCalculator::transformationsEqual(), QgsComposerMap::xGridLines(), and QgsComposerMap::yGridLines().

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Variable Documentation

void( *)() cast_to_fptr(void *p)

Definition at line 114 of file qgis.h.

Referenced by QgsRasterLayer::buildSupportedRasterFileFilter(), QgsProviderRegistry::getProvider(), QgsRasterLayer::isValidRasterFileName(), QgsRasterLayer::loadProvider(), and QgsProviderRegistry::QgsProviderRegistry().

const double DEFAULT_LINE_WIDTH = 0.26

Definition at line 176 of file qgis.h.

Referenced by QgsSymbol::QgsSymbol().

const double DEFAULT_POINT_SIZE = 2.0

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

Definition at line 175 of file qgis.h.

const int ELLPS_PREFIX_LEN = 7

The length of the string "+ellps=".

Definition at line 161 of file qgis.h.

const QString GEO_EPSG_CRS_AUTHID = "EPSG:4326"

Geographic coord sys from EPSG authority.

Definition at line 157 of file qgis.h.

Referenced by QgsVectorLayer::setCoordinateSystem(), and QgsCoordinateReferenceSystem::validate().

const long GEO_EPSG_CRS_ID = 4326

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

Definition at line 155 of file qgis.h.

const long GEOCRS_ID = 3452

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

Definition at line 153 of file qgis.h.

Referenced by QgsCoordinateReferenceSystem::createFromOgcWmsCrs(), QgsDistanceArea::QgsDistanceArea(), QgsMapRenderer::QgsMapRenderer(), and QgsCoordinateReferenceSystem::readXML().

const QString GEOPROJ4 = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"

PROJ4 string that represents a geographic coord sys.

Definition at line 149 of file qgis.h.

const long GEOSRID = 4326

Magic number for a geographic coord sys in POSTGIS SRID.

Definition at line 151 of file qgis.h.

const QString GEOWkt = " AUTHORITY[\"EPSG\",4326]]"

Wkt string that represents a geographic coord sys.

Definition at line 136 of file qgis.h.

const int LAT_PREFIX_LEN = 7

The length of the string "+lat_1=".

Definition at line 163 of file qgis.h.

Referenced by QgsCoordinateReferenceSystem::createFromProj4().

const double MINIMUM_POINT_SIZE = 0.1

Magic number that determines the minimum allowable point size for point symbols.

Definition at line 173 of file qgis.h.

Referenced by QgsSymbol::setPointSize().

const int PROJ_PREFIX_LEN = 6

The length of the string "+proj=".

Definition at line 159 of file qgis.h.

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 166 of file qgis.h.

Referenced by QgsCoordinateReferenceSystem::createFromSrsId(), QgsProjectionSelector::getSelectedExpression(), QgsCoordinateReferenceSystem::loadFromDb(), QgsCoordinateReferenceSystem::proj4FromSrsId(), QgsCoordinateReferenceSystem::saveAsUserCRS(), QgsProjectionSelector::selectedAuthId(), and QgsProjectionSelector::selectedProj4String().