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.
Q_DECL_DEPRECATED const QString	GEOWkt = GEOWKT
	Wkt string that represents a geographic coord sys.
CORE_EXPORT const QString	GEOPROJ4
	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
const double	DEFAULT_SEGMENT_EPSILON = 1e-8
	default snapping tolerance for segments (

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Function Documentation

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

Definition at line 130 of file qgis.h.

Referenced by QgsClipper::connectSeparatedLines(), QgsSymbolLayerV2Utils::convertPolygonSymbolizerToPointMarker(), QgsEllipseSymbolLayerV2::createFromSld(), QgsMarkerLineSymbolLayerV2::createFromSld(), QgsSymbolLayerV2Utils::externalMarkerToSld(), QgsClipper::intersectRect(), QgsSymbolLayerV2Utils::lineToSld(), QgsGeometryAnalyzer::locateAlongSegment(), QgsRelief::optimiseClassBreaks(), QgsEllipseSymbolLayerV2::renderPoint(), QgsSvgMarkerSymbolLayerV2::renderPoint(), QgsImageFillSymbolLayer::renderPolygon(), QgsCoordinateReferenceSystem::setMapUnits(), QgsPoint::sqrDistToSegment(), QgsSVGFillSymbolLayer::startRender(), QgsLinePatternFillSymbolLayer::startRender(), QgsPointPatternFillSymbolLayer::startRender(), QgsMarkerLineSymbolLayerV2::toSld(), QgsRasterCalculator::transformationsEqual(), QgsSymbolLayerV2Utils::wellKnownMarkerToSld(), QgsEllipseSymbolLayerV2::writeSldMarker(), QgsComposerMap::xGridLines(), and QgsComposerMap::yGridLines().

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Variable Documentation

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

Definition at line 115 of file qgis.h.

Referenced by QgsBrowserModel::addRootItems(), QgsRasterLayer::buildSupportedRasterFileFilter(), QgsDirectoryItem::createChildren(), QgsRasterLayer::isValidRasterFileName(), QgsRasterLayer::loadProvider(), QgsProviderRegistry::provider(), QgsDirectoryItem::QgsDirectoryItem(), QgsProviderRegistry::QgsProviderRegistry(), QgsVectorLayerImport::QgsVectorLayerImport(), QgsZipItem::QgsZipItem(), QgsNewVectorLayerDialog::runAndCreateLayer(), and QgsProviderRegistry::selectWidget().

const double DEFAULT_LINE_WIDTH = 0.26

Definition at line 187 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 186 of file qgis.h.

const double DEFAULT_SEGMENT_EPSILON = 1e-8

default snapping tolerance for segments (

Note:

added in 1.8)

Definition at line 190 of file qgis.h.

const int ELLPS_PREFIX_LEN = 7

The length of the string "+ellps=".

Definition at line 172 of file qgis.h.

const QString GEO_EPSG_CRS_AUTHID = "EPSG:4326"

Geographic coord sys from EPSG authority.

Definition at line 168 of file qgis.h.

Referenced by QgsNewVectorLayerDialog::QgsNewVectorLayerDialog(), 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 166 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 164 of file qgis.h.

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

CORE_EXPORT const QString GEOPROJ4

PROJ4 string that represents a geographic coord sys.

Definition at line 46 of file qgis.cpp.

const long GEOSRID = 4326

Magic number for a geographic coord sys in POSTGIS SRID.

Definition at line 162 of file qgis.h.

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

Wkt string that represents a geographic coord sys.

Note:

added in 1.8 to replace GEOWkt

Definition at line 139 of file qgis.h.

Q_DECL_DEPRECATED const QString GEOWkt = GEOWKT

Wkt string that represents a geographic coord sys.

Note:

deprecated in 1.8 due to violation of coding conventions (globals should be in all caps).

Definition at line 158 of file qgis.h.

const int LAT_PREFIX_LEN = 7

The length of the string "+lat_1=".

Definition at line 174 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 184 of file qgis.h.

Referenced by QgsSymbol::setPointSize().

const int PROJ_PREFIX_LEN = 6

The length of the string "+proj=".

Definition at line 170 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 177 of file qgis.h.

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