QgsPoint QgsMapSettings::layerToMapCoordinates( QgsMapLayer* theLayer, QgsPoint point ) const
{
if ( hasCrsTransformEnabled() )
{
try
{
if ( const QgsCoordinateTransform* ct = layerTransform( theLayer ) )
point = ct->transform( point, QgsCoordinateTransform::ForwardTransform );
}
catch ( QgsCsException &cse )
{
QgsMessageLog::logMessage( QString( "Transform error caught: %1" ).arg( cse.what() ), "CRS" );
}
}
else
{
// leave point without transformation
}
return point;
}
QgsRectangle QgsMapSettings::outputExtentToLayerExtent( const QgsMapLayer *layer, QgsRectangle extent ) const
{
try
{
QgsCoordinateTransform ct = layerTransform( layer );
if ( ct.isValid() )
{
QgsDebugMsgLevel( QStringLiteral( "sourceCrs = %1" ).arg( ct.sourceCrs().authid() ), 3 );
QgsDebugMsgLevel( QStringLiteral( "destCRS = %1" ).arg( ct.destinationCrs().authid() ), 3 );
QgsDebugMsgLevel( QStringLiteral( "extent = %1" ).arg( extent.toString() ), 3 );
extent = ct.transformBoundingBox( extent, QgsCoordinateTransform::ReverseTransform );
}
}
catch ( QgsCsException &cse )
{
QgsMessageLog::logMessage( QObject::tr( "Transform error caught: %1" ).arg( cse.what() ), QObject::tr( "CRS" ) );
}
QgsDebugMsgLevel( QStringLiteral( "proj extent = %1" ).arg( extent.toString() ), 3 );
return extent;
}
QgsRectangle QgsMapSettings::outputExtentToLayerExtent( QgsMapLayer* theLayer, QgsRectangle extent ) const
{
if ( hasCrsTransformEnabled() )
{
try
{
if ( const QgsCoordinateTransform* ct = layerTransform( theLayer ) )
{
QgsDebugMsg( QString( "sourceCrs = " + ct->sourceCrs().authid() ) );
QgsDebugMsg( QString( "destCRS = " + ct->destCRS().authid() ) );
QgsDebugMsg( QString( "extent = " + extent.toString() ) );
extent = ct->transformBoundingBox( extent, QgsCoordinateTransform::ReverseTransform );
}
}
catch ( QgsCsException &cse )
{
QgsMessageLog::logMessage( QString( "Transform error caught: %1" ).arg( cse.what() ), "CRS" );
}
}
QgsDebugMsg( QString( "proj extent = " + extent.toString() ) );
return extent;
}
double QgsMapSettings::layerToMapUnits( const QgsMapLayer *layer, const QgsRectangle &referenceExtent ) const
{
return layerTransform( layer ).scaleFactor( referenceExtent );
}
