json QgsMultiPolygon::asJsonObject( int precision ) const
{
json polygons( json::array( ) );
for ( const QgsAbstractGeometry *geom : qgis::as_const( mGeometries ) )
{
if ( qgsgeometry_cast<const QgsPolygon *>( geom ) )
{
json coordinates( json::array( ) );
const QgsPolygon *polygon = static_cast<const QgsPolygon *>( geom );
std::unique_ptr< QgsLineString > exteriorLineString( polygon->exteriorRing()->curveToLine() );
QgsPointSequence exteriorPts;
exteriorLineString->points( exteriorPts );
coordinates.push_back( QgsGeometryUtils::pointsToJson( exteriorPts, precision ) );
std::unique_ptr< QgsLineString > interiorLineString;
for ( int i = 0, n = polygon->numInteriorRings(); i < n; ++i )
{
interiorLineString.reset( polygon->interiorRing( i )->curveToLine() );
QgsPointSequence interiorPts;
interiorLineString->points( interiorPts );
coordinates.push_back( QgsGeometryUtils::pointsToJson( interiorPts, precision ) );
}
polygons.push_back( coordinates );
}
}
return
{
{ "type", "MultiPolygon" },
{ "coordinates", polygons }
};
}
QString QgsMultiPolygon::asJson( int precision ) const
{
// GeoJSON does not support curves
QString json = QStringLiteral( "{\"type\": \"MultiPolygon\", \"coordinates\": [" );
for ( const QgsAbstractGeometry *geom : mGeometries )
{
if ( qgsgeometry_cast<const QgsPolygon *>( geom ) )
{
json += '[';
const QgsPolygon *polygon = static_cast<const QgsPolygon *>( geom );
std::unique_ptr< QgsLineString > exteriorLineString( polygon->exteriorRing()->curveToLine() );
QgsPointSequence exteriorPts;
exteriorLineString->points( exteriorPts );
json += QgsGeometryUtils::pointsToJSON( exteriorPts, precision ) + ", ";
std::unique_ptr< QgsLineString > interiorLineString;
for ( int i = 0, n = polygon->numInteriorRings(); i < n; ++i )
{
interiorLineString.reset( polygon->interiorRing( i )->curveToLine() );
QgsPointSequence interiorPts;
interiorLineString->points( interiorPts );
json += QgsGeometryUtils::pointsToJSON( interiorPts, precision ) + ", ";
}
if ( json.endsWith( QLatin1String( ", " ) ) )
{
json.chop( 2 ); // Remove last ", "
}
json += QLatin1String( "], " );
}
}
if ( json.endsWith( QLatin1String( ", " ) ) )
{
json.chop( 2 ); // Remove last ", "
}
json += QLatin1String( "] }" );
return json;
}
