| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2006 IVER T.I. and Generalitat Valenciana.

 *

 * 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; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 */

package org.gvsig.raster.grid.roi;

import org.gvsig.raster.buffer.RasterBufferInvalidAccessException;

import org.gvsig.raster.buffer.RasterBufferInvalidException;

import org.gvsig.raster.dataset.IBuffer;

import org.gvsig.raster.grid.Grid;

import org.gvsig.raster.grid.GridException;

import org.gvsig.raster.grid.OutOfGridException;

/**

 * Clase que representa una regi?n de interes conformada por

 * un raster. 

 * 

 * @author Diego Guerrero Sevilla (diego.guerrero@uclm.es)

 *

 */

public class RasterROI extends ROI {

        /**

         * Grid que define el ROI a modo de m?scara

         * (NO_DATA -> no isInGrid)

         */

        private Grid maskGrid = null;

        public RasterROI(Grid grid) {

                super(grid);

                int bands[] = {1};

                try {

                        maskGrid = new Grid(grid.getGridExtent(), grid.getGridExtent(), IBuffer.TYPE_INT, bands);

                        getGridExtent().setXRange(maskGrid.getGridExtent().getMin().getX(), maskGrid.getGridExtent().getMax().getX());

                        getGridExtent().setYRange(maskGrid.getGridExtent().getMin().getY(), maskGrid.getGridExtent().getMax().getY());

                        for (int x = 0; x < maskGrid.getNX();x++)

                                for (int y = 0; y<maskGrid.getNY();y++)

                                        maskGrid.setNoData(x, y);

                } catch (RasterBufferInvalidException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

        }

        public boolean isInGrid(int x, int y) {

                try {

                        return (maskGrid.isInGrid(x, y) && !maskGrid.isNoDataValue(getValue(x, y)));

                } catch (GridException e) {

                        return false;

                }

        }

        /**

         * 

         * @return Grid que define la ROI

         */

        public Grid getMaskGrid() {

                return maskGrid;

        }

        /**

         * Obtiene un valor de una celda del grid independientemente del tipo de dato.

         * @param x Posici?n en X

         * @param y Posici?n en Y

         * @return Valor de la celda en formato double

         * @throws RasterBufferInvalidAccessException 

         * @throws RasterBufferInvalidAccessException

         */

        private double getValue(int x, int y) throws GridException {

                switch(getMaskGrid().getDataType()) {

                case IBuffer.TYPE_BYTE:return (double)(getMaskGrid().getCellValueAsByte(x, y));

                case IBuffer.TYPE_SHORT:return (double)(getMaskGrid().getCellValueAsShort(x, y));

                case IBuffer.TYPE_INT:return (double)(getMaskGrid().getCellValueAsInt(x, y));

                case IBuffer.TYPE_FLOAT:return (double)getMaskGrid().getCellValueAsFloat(x, y);

                case IBuffer.TYPE_DOUBLE:return (double)getMaskGrid().getCellValueAsDouble(x, y);

                }

                return 0;

        }

        /**

         * A?ade el pixel con coordenadas <code>x</code>,<code>y</code> (coordenadas pixel) al ROI

         * 

         * @param x

         * @param y

         */

        public void addPoint(int x, int y) {

                try {

                        maskGrid.setCellValue(x, y, 1);

                        getStatistic().setStatisticsCalculated(false);

                        getStatistic().setAdvancedStatisticCalculated(false);

                } catch (OutOfGridException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

        }

        /**

         * Excluye al pixel con coordenadas <code>x</code>,<code>y</code> de su participaci?n en la ROI.

         * 

         * @param x

         * @param y

         */

        public void removePoint(int x, int y){

                        maskGrid.setNoData(x, y);

                        getStatistic().setStatisticsCalculated(false);

                        getStatistic().setAdvancedStatisticCalculated(false);

        }

        /**

         * Excluye a todos los p?xeles de la ROI

         *

         */

        public void clear(){

                for(int x = 0; x <         getGridExtent().getNX(); x++)

                        for(int y = 0; y < getGridExtent().getNY(); y++)

                                maskGrid.setNoData(x, y);

                getStatistic().setStatisticsCalculated(false);

                getStatistic().setAdvancedStatisticCalculated(false);

        }

}