void QgsCoordinateTransformContext::readSettings()
{
d.detach();
d->mLock.lockForWrite();
d->mSourceDestDatumTransforms.clear();
#if 0
d->mSourceDatumTransforms.clear();
d->mDestDatumTransforms.clear();
#endif
QgsSettings settings;
settings.beginGroup( QStringLiteral( "/Projections" ) );
QStringList projectionKeys = settings.allKeys();
//collect src and dest entries that belong together
QMap< QPair< QString, QString >, QPair< int, int > > transforms;
QStringList::const_iterator pkeyIt = projectionKeys.constBegin();
for ( ; pkeyIt != projectionKeys.constEnd(); ++pkeyIt )
{
if ( pkeyIt->contains( QLatin1String( "srcTransform" ) ) || pkeyIt->contains( QLatin1String( "destTransform" ) ) )
{
QStringList split = pkeyIt->split( '/' );
QString srcAuthId, destAuthId;
if ( ! split.isEmpty() )
{
srcAuthId = split.at( 0 );
}
if ( split.size() > 1 )
{
destAuthId = split.at( 1 ).split( '_' ).at( 0 );
}
QString proj = settings.value( *pkeyIt ).toString();
Q_NOWARN_DEPRECATED_PUSH
int datumId = QgsDatumTransform::projStringToDatumTransformId( proj );
Q_NOWARN_DEPRECATED_POP
if ( pkeyIt->contains( QLatin1String( "srcTransform" ) ) )
{
transforms[ qMakePair( srcAuthId, destAuthId )].first = datumId;
}
else if ( pkeyIt->contains( QLatin1String( "destTransform" ) ) )
{
transforms[ qMakePair( srcAuthId, destAuthId )].second = datumId;
}
}
}
