Quantum GIS API Documentation  1.7.5-Wroclaw
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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...
 

Macros

#define QGISEXTERN   extern "C"
 

Functions

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

Variables

void(*)() cast_to_fptr (void *p)
 
const QString GEOWkt
 Wkt string that represents a geographic coord sys. More...
 
const QString GEOPROJ4 = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"
 PROJ4 string that represents a geographic coord sys. More...
 
const long GEOSRID = 4326
 Magic number for a geographic coord sys in POSTGIS SRID. More...
 
const long GEOCRS_ID = 3452
 Magic number for a geographic coord sys in QGIS srs.db tbl_srs.srs_id. More...
 
const long GEO_EPSG_CRS_ID = 4326
 Magic number for a geographic coord sys in EpsgCrsId ID format. More...
 
const QString GEO_EPSG_CRS_AUTHID = "EPSG:4326"
 Geographic coord sys from EPSG authority. More...
 
const int PROJ_PREFIX_LEN = 6
 The length of the string "+proj=". More...
 
const int ELLPS_PREFIX_LEN = 7
 The length of the string "+ellps=". More...
 
const int LAT_PREFIX_LEN = 7
 The length of the string "+lat_1=". More...
 
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...
 
const double MINIMUM_POINT_SIZE = 0.1
 Magic number that determines the minimum allowable point size for point symbols. More...
 
const double DEFAULT_POINT_SIZE = 2.0
 Magic number that determines the default point size for point symbols. More...
 
const double DEFAULT_LINE_WIDTH = 0.26
 

Macro Definition Documentation

#define QGISEXTERN   extern "C"

Definition at line 187 of file qgis.h.

Function Documentation

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

Variable Documentation

void( *)() cast_to_fptr(void *p)
inline
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
Initial value:
=
"GEOGCS[\"WGS 84\", "
" DATUM[\"WGS_1984\", "
" SPHEROID[\"WGS 84\",6378137,298.257223563, "
" AUTHORITY[\"EPSG\",7030]], "
" TOWGS84[0,0,0,0,0,0,0], "
" AUTHORITY[\"EPSG\",6326]], "
" PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",8901]], "
" UNIT[\"DMSH\",0.0174532925199433,AUTHORITY[\"EPSG\",9108]], "
" AXIS[\"Lat\",NORTH], "
" AXIS[\"Long\",EAST], "
" 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