Quantum GIS API Documentation  1.7.4
Classes | Functions | Variables
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

Function Documentation

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

Variable Documentation

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