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Standard interfaces implemented throughout the library.
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/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2011, Open Source Geospatial Foundation (OSGeo)
* (C) 2008, Open Geospatial Consortium Inc.
*
* All Rights Reserved. http://www.opengis.org/legal/
*/
package org.opengis.style;
import org.opengis.annotation.Extension;
import org.opengis.annotation.XmlElement;
import org.opengis.filter.expression.Expression;
/**
* The Displacement gives the X and Y displacements from the original geometry. This element may be
* used to avoid over-plotting of multiple PolygonSymbolizers for one geometry or supplying
* "shadows" of polygon gemeotries. The displacements are in units of pixels above and to the right
* of the point. The default displacement is X=0, Y=0.
*
* @version Symbology Encoding
* Implementation Specification 1.1.0
* @author Open Geospatial Consortium
* @author Johann Sorel (Geomatys)
* @author Ian Turton, CCG
* @since GeoAPI 2.2
*/
@XmlElement("Displacement")
public interface Displacement {
/**
* Returns an expression that computes a pixel offset from the geometry point. This offset point
* is where the text's anchor point gets located. If this expression is null, the default offset
* of zero is used.
*
* @return Expression
*/
@XmlElement("DisplacementX")
Expression getDisplacementX();
/**
* Returns an expression that computes a pixel offset from the geometry point. This offset point
* is where the text's anchor point gets located. If this expression is null, the default offset
* of zero is used.
*
* @return Expression
*/
@XmlElement("DisplacementY")
Expression getDisplacementY();
/**
* calls the visit method of a StyleVisitor
*
* @param visitor the style visitor
*/
@Extension
Object accept(StyleVisitor visitor, Object extraData);
}