Region.java

package org.geogebra.common.kernel;

import org.geogebra.common.kernel.kernelND.GeoElementND;
import org.geogebra.common.kernel.kernelND.GeoPointND;

/**
 * @author Mathieu Blossier
 * 
 */

public interface Region extends GeoElementND {

	/**
	 * Sets coords of P when the coords of P have changed. Afterwards P lies in
	 * this region.
	 * 
	 * @param P
	 *            point
	 * 
	 */
	public void pointChangedForRegion(GeoPointND P);

	/**
	 * Sets coords of P when this region has changed. Afterwards P lies in this
	 * region.
	 * 
	 * @param P
	 *            point
	 * 
	 *
	 */
	public void regionChanged(GeoPointND P);

	/**
	 * Returns true if the given point lies inside this Region.
	 * 
	 * @param P
	 *            point
	 * @return true if the given point lies inside this Region.
	 */
	public boolean isInRegion(GeoPointND P);

	/**
	 * says if the point (x0,y0) is in the region
	 * 
	 * @param x0
	 *            x-coord of the point
	 * @param y0
	 *            y-coord of the point
	 * @return true if the point (x0,y0) is in the region
	 */
	public boolean isInRegion(double x0, double y0);

}