/* 
GeoGebra - Dynamic Mathematics for Everyone
http://www.geogebra.org

This file is part of GeoGebra.

This program is free software; you can redistribute it and/or modify it 
under the terms of the GNU General Public License as published by 
the Free Software Foundation.

*/

package geogebra.kernel;


public class AlgoCentroidPolygon extends AlgoElement {

    /**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private GeoPolygon p;  // input
    private GeoPoint centroid; // output                         
        
    AlgoCentroidPolygon(Construction cons, String label,GeoPolygon p) {
        super(cons);
        this.p = p;       
        centroid = new GeoPoint(cons);  
        setInputOutput(); // for AlgoElement
                
        compute();              
        centroid.setLabel(label);         
    }   
    
    public String getClassName() {
        return "AlgoCentroidPolygon";
    }
    
    // for AlgoElement
    protected void setInputOutput() {
        input = new GeoElement[1];
        input[0] = p;        
        
        output = new GeoElement[1];        
        output[0] = centroid;
        setDependencies(); // done by AlgoElement
    }    
    
    GeoPolygon getPolygon() { return p; }
    GeoPoint getPoint() { return centroid; }    
        
    protected final void compute() {
        p.calcCentroid(centroid);
    }
    
    final public String toString() {
        // Michael Borcherds 2008-03-30
        // simplified to allow better Chinese translation
        return app.getPlain("CentroidOfA",p.getLabel());
    }
}