TGIS_LayerVector.Loop(TGIS_Extent, java.lang.String) method

Prepares enumerator (also known as iterator or cursor) to iterate the layer.

Available also on: Delphi | .NET | ActiveX | Python.

Syntax

// Java
public TGIS_LayerVectorEnumeratorFactory Loop(
  TGIS_Extent _extent,
  java.lang.String _query
);

// Oxygene
public
  function Loop(
    _extent : TGIS_Extent;
    _query : String
  ) : TGIS_LayerVectorEnumeratorFactory; virtual;

Name	Type	Description
_extent	TGIS_Extent	extent of items to be found; expected _extent units are in a Layer coordinate space
_query	java.lang.String String	query which must be matched by item; closely mimics SQL WHERE clause; for examples you can use 'AGE >= 18'; empty (default) means that no items will match.

Type	Description
TGIS_LayerVectorEnumeratorFactory	Shape itself or nil.