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qgis.h
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qgis.h
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/***************************************************************************
qgis.h - QGIS namespace
-------------------
begin : Sat Jun 30 2002
copyright : (C) 2002 by Gary E.Sherman
email : sherman at mrcc.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
/* $Id$ */
#ifndef QGIS_H
#define QGIS_H
/*! \mainpage Quantum GIS
*
* \section about About QGIS
* Quantum GIS (QGIS) is a user friendly Open Source Geographic Information
* System (GIS) that runs on Linux, Unix, Mac OSX, and Windows. QGIS supports
* vector, raster, and database formats. QGIS is licensed under the GNU Public
* License.
*
* This API documentation provides information about all classes that make up QGIS.
*/
#include <QEvent>
#include <QString>
class CORE_EXPORT QGis
{
public:
// Version constants
//
// Version string
static const char* qgisVersion;
// Version number used for comparing versions using the "Check QGIS Version" function
static const int qgisVersionInt;
// Release name
static const char* qgisReleaseName;
// The subversion version
static const char* qgisSvnVersion;
// Enumerations
//
//! Used for symbology operations
// Feature types
enum WKBTYPE
{
WKBPoint = 1,
WKBLineString,
WKBPolygon,
WKBMultiPoint,
WKBMultiLineString,
WKBMultiPolygon,
WKBUnknown,
WKBPoint25D = 0x80000001,
WKBLineString25D,
WKBPolygon25D,
WKBMultiPoint25D,
WKBMultiLineString25D,
WKBMultiPolygon25D
};
enum VectorType
{
Point,
Line,
Polygon,
Unknown
};
static const char *qgisVectorGeometryType[];
//! description strings for feature types
static const char *qgisFeatureTypes[];
//! map units that qgis supports
typedef enum
{
METERS,
FEET,
DEGREES,
UNKNOWN
} units;
//! User defined event types
enum UserEvent
{
// These first two are useful for threads to alert their parent data providers
//! The extents have been calculated by a provider of a layer
ProviderExtentCalcEvent = (QEvent::User + 1),
//! The row count has been calculated by a provider of a layer
ProviderCountCalcEvent
};
static const double DEFAULT_IDENTIFY_RADIUS;
};
/** WKT string that represents a geographic coord sys */
const QString GEOWKT =
"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]]";
/** PROJ4 string that represents a geographic coord sys */
const QString GEOPROJ4 = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs";
/** Magic number for a geographic coord sys in POSTGIS SRID */
const long GEOSRID = 4326;
/** Magic number for a geographic coord sys in QGIS srs.db tbl_srs.srs_id */
const long GEOSRS_ID = 2585;
/** Magic number for a geographic coord sys in EPSG ID format */
const long EPSGID = 4326;
/** The length of teh string "+proj=" */
const int PROJ_PREFIX_LEN = 6;
/** The length of teh string "+ellps=" */
const int ELLPS_PREFIX_LEN = 7;
/** The length of teh string "+lat_1=" */
const int LAT_PREFIX_LEN = 7;
/** Magick number that determins whether a projection srsid is a system (srs.db)
* or user (~/.qgis.qgis.db) defined projection. */
const int USER_PROJECTION_START_ID=100000;
//
// Constants for point symbols
//
/** Magic number that determines the minimum allowable point size for point symbols */
const float MINIMUM_POINT_SIZE=0.1;
/** Magic number that determines the minimum allowable point size for point symbols */
const float DEFAULT_POINT_SIZE=2.0;
// FIXME: also in qgisinterface.h
#ifndef QGISEXTERN
#ifdef WIN32
# define QGISEXTERN extern "C" __declspec( dllexport )
# ifdef _MSC_VER
// do not warn about C bindings returing QString
# pragma warning(disable:4190)
# endif
#else
# define QGISEXTERN extern "C"
#endif
#endif
#endif