/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2003-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.renderer.style;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Paint;
import org.geotools.styling.Fill;
import org.geotools.styling.PolygonSymbolizer;
import org.opengis.feature.simple.SimpleFeature;
/**
* A dynamic polygon style, that will compute its parameters each time they are requested instead
* of caching them
*
* @author jamesm
*
*
* @source $URL$
*/
public class DynamicPolygonStyle2D extends org.geotools.renderer.style.PolygonStyle2D {
SimpleFeature feature;
PolygonSymbolizer ps;
/**
* Creates a new instance of DynamicPolygonStyle2D
*/
public DynamicPolygonStyle2D(SimpleFeature f, PolygonSymbolizer sym) {
feature = f;
ps = sym;
}
/**
* Computes and returns the fill based on the feature and the symbolizer
*/
public java.awt.Paint getFill() {
Fill fill = ps.getFill();
if (fill == null) {
return null;
}
Paint fillPaint = (Color) fill.getColor().evaluate(feature, Color.class);
// if a graphic fill is to be used, prepare the paint accordingly....
org.geotools.styling.Graphic gr = fill.getGraphicFill();
if (gr != null) {
SLDStyleFactory fac = new SLDStyleFactory();
fillPaint = fac.getTexturePaint(gr, feature, ps);
}
return fillPaint;
}
/**
* Computes and returns the fill composite based on the feature and the symbolizer
*/
public Composite getFillComposite() {
Fill fill = ps.getFill();
if (fill == null) {
return null;
}
// get the opacity and prepare the composite
float opacity = ((Float) fill.getOpacity().evaluate(feature,Float.class)).floatValue();
if (opacity == 1) {
return null;
}
return AlphaComposite.getInstance(AlphaComposite.SRC_OVER, opacity);
}
}