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Added logic for getting projection from epsg and qgis srsid codes. Fixed sql errors.

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git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@3229 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
timlinux 2005-04-27 01:17:30 +00:00
parent 2207464fa5
commit 1d70236cad
1 changed files with 128 additions and 1 deletions
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129
src/qgsspatialrefsys.cpp
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@ -85,7 +85,7 @@ void QgsSpatialRefSys::createFromSrid(long theSrid)
is_geo integer NOT NULL);
*/
QString mySql = "select (srs_id,description,projection_acronym,ellipsoid_acronym,parameters,srid,epsg,s_geo) from tbl_srs where srs_id='" + QString::number(theSrid) + "'";
QString mySql = "select srs_id,description,projection_acronym,ellipsoid_acronym,parameters,srid,epsg,is_geo from tbl_srs where srs_id='" + QString::number(theSrid) + "'";
myResult = sqlite3_prepare(myDatabase, (const char *)mySql, mySql.length(), &myPreparedStatement, &myTail);
// XXX Need to free memory from the error msg if one is set
if(myResult == SQLITE_OK)
@ -155,12 +155,139 @@ void QgsSpatialRefSys::createFromWkt(QString theWkt)
void QgsSpatialRefSys::createFromEpsg(long theEpsg)
{
#ifdef QGISDEBUG
std::cout << " QgsSpatialRefSys::createFromEpsg" << std::endl;
#endif
// Get the package data path and set the full path name to the sqlite3 spatial reference
// database.
#if defined(Q_OS_MACX) || defined(WIN32)
QString PKGDATAPATH = qApp->applicationDirPath() + "/share/qgis";
#endif
QString myDatabaseFileName = PKGDATAPATH;
myDatabaseFileName += "/resources/srs.db";
sqlite3 *myDatabase;
char *myErrorMessage = 0;
const char *myTail;
sqlite3_stmt *myPreparedStatement;
int myResult;
//check the db is available
myResult = sqlite3_open(myDatabaseFileName.latin1(), &myDatabase);
if(myResult)
{
std::cout << "Can't open database: " << sqlite3_errmsg(myDatabase) << std::endl;
// XXX This will likely never happen since on open, sqlite creates the
// database if it does not exist.
assert(myResult == 0);
}
/*
srs_id INTEGER PRIMARY KEY,
description text NOT NULL,
projection_acronym text NOT NULL,
ellipsoid_acronym NOT NULL,
parameters text NOT NULL,
srid integer NOT NULL,
epsg integer NOT NULL,
is_geo integer NOT NULL);
*/
QString mySql = "select srs_id,description,projection_acronym,ellipsoid_acronym,parameters,srid,epsg,is_geo from tbl_srs where epsg_id='" + QString::number(theEpsg) + "'";
myResult = sqlite3_prepare(myDatabase, (const char *)mySql, mySql.length(), &myPreparedStatement, &myTail);
// XXX Need to free memory from the error msg if one is set
if(myResult == SQLITE_OK)
{
sqlite3_step(myPreparedStatement) == SQLITE_ROW;
mSrsId = QString ((char *)sqlite3_column_text(myPreparedStatement,0)).toLong();
mDescription = QString ((char *)sqlite3_column_text(myPreparedStatement,1));
mProjectionAcronym = QString ((char *)sqlite3_column_text(myPreparedStatement,2));
mEllipsoidAcronym = QString ((char *)sqlite3_column_text(myPreparedStatement,3));
mParameters = QString ((char *)sqlite3_column_text(myPreparedStatement,4));
mSRID = QString ((char *)sqlite3_column_text(myPreparedStatement,5)).toLong();
mEpsg = QString ((char *)sqlite3_column_text(myPreparedStatement,6)).toLong();
mGeoFlag = QString ((char *)sqlite3_column_text(myPreparedStatement,7));
isValidFlag==true;
}
else
{
#ifdef QGISDEBUG
std::cout << " QgsSpatialRefSys::createFromEpsg failed : " << mySql << std::endl;
#endif
isValidFlag==false;
}
sqlite3_finalize(myPreparedStatement);
sqlite3_close(myDatabase);
}
void QgsSpatialRefSys::createFromSystemSrsId (long theSrsId)
{
#ifdef QGISDEBUG
std::cout << " QgsSpatialRefSys::createFromSystemSrsId" << std::endl;
#endif
// Get the package data path and set the full path name to the sqlite3 spatial reference
// database.
#if defined(Q_OS_MACX) || defined(WIN32)
QString PKGDATAPATH = qApp->applicationDirPath() + "/share/qgis";
#endif
QString myDatabaseFileName = PKGDATAPATH;
myDatabaseFileName += "/resources/srs.db";
sqlite3 *myDatabase;
char *myErrorMessage = 0;
const char *myTail;
sqlite3_stmt *myPreparedStatement;
int myResult;
//check the db is available
myResult = sqlite3_open(myDatabaseFileName.latin1(), &myDatabase);
if(myResult)
{
std::cout << "Can't open database: " << sqlite3_errmsg(myDatabase) << std::endl;
// XXX This will likely never happen since on open, sqlite creates the
// database if it does not exist.
assert(myResult == 0);
}
/*
srs_id INTEGER PRIMARY KEY,
description text NOT NULL,
projection_acronym text NOT NULL,
ellipsoid_acronym NOT NULL,
parameters text NOT NULL,
srid integer NOT NULL,
epsg integer NOT NULL,
is_geo integer NOT NULL);
*/
QString mySql = "select srs_id,description,projection_acronym,ellipsoid_acronym,parameters,srid,epsg,is_geo from tbl_srs where srs_id='" + QString::number(theSrsId) + "'";
myResult = sqlite3_prepare(myDatabase, (const char *)mySql, mySql.length(), &myPreparedStatement, &myTail);
// XXX Need to free memory from the error msg if one is set
if(myResult == SQLITE_OK)
{
sqlite3_step(myPreparedStatement) == SQLITE_ROW;
mSrsId = QString ((char *)sqlite3_column_text(myPreparedStatement,0)).toLong();
mDescription = QString ((char *)sqlite3_column_text(myPreparedStatement,1));
mProjectionAcronym = QString ((char *)sqlite3_column_text(myPreparedStatement,2));
mEllipsoidAcronym = QString ((char *)sqlite3_column_text(myPreparedStatement,3));
mParameters = QString ((char *)sqlite3_column_text(myPreparedStatement,4));
mSRID = QString ((char *)sqlite3_column_text(myPreparedStatement,5)).toLong();
mEpsg = QString ((char *)sqlite3_column_text(myPreparedStatement,6)).toLong();
mGeoFlag = QString ((char *)sqlite3_column_text(myPreparedStatement,7));
isValidFlag==true;
}
else
{
#ifdef QGISDEBUG
std::cout << " QgsSpatialRefSys::createFromSystemSrsId failed : " << mySql << std::endl;
#endif
isValidFlag==false;
}
sqlite3_finalize(myPreparedStatement);
sqlite3_close(myDatabase);
}