| gvSIG desktop 1

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

 *

 * Copyright (C) 2007 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.rastertools.enhanced.graphics;

import java.awt.Color;

import org.gvsig.raster.beans.canvas.GCanvas;

import org.gvsig.raster.beans.canvas.layers.Border;

import org.gvsig.raster.beans.canvas.layers.GraphicHistogram;

import org.gvsig.raster.beans.canvas.layers.InfoLayer;

import org.gvsig.raster.beans.canvas.layers.MinMaxLines;

import org.gvsig.raster.beans.canvas.layers.functions.BaseFunction;

import org.gvsig.raster.beans.canvas.layers.functions.DensitySlicingLine;

import org.gvsig.raster.beans.canvas.layers.functions.LogaritmicExponentialLine;

import org.gvsig.raster.beans.canvas.layers.functions.SquareRootPowLine;

import org.gvsig.raster.beans.canvas.layers.functions.StraightLine;

import org.gvsig.raster.datastruct.Histogram;

import org.gvsig.rastertools.enhanced.ui.EnhancedListener;

/**

 * Componente con el histograma de entrada.

 * 

 * 20/02/2008

 * @author Nacho Brodin nachobrodin@gmail.com

 */

public class InputHistogram extends HistogramGraphicBase {

        private static final long serialVersionUID = 681848373747974757L;

        /**

         * Crea una nueva instancia de InputHistogram.

         */

        public InputHistogram(Histogram hist, int[] renderBands, double[] minList, double[] maxList) {

                super(hist, renderBands, minList, maxList);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.rastertools.enhanced.graphics.HistogramGraphicBase#getCanvas()

         */

        public GCanvas getCanvas() {

                if(canvas == null) {

                        canvas = new GCanvas(Color.BLACK);

                        canvas.addDrawableElement(new GraphicHistogram(Color.white));

                        canvas.addDrawableElement(new MinMaxLines(minMaxLineColor));

                        canvas.addDrawableElement(new StraightLine(functionColor));

                        canvas.addDrawableElement(new Border(borderColor));

                        canvas.addDrawableElement(new InfoLayer(Color.WHITE));

                }

                return canvas;

        }

        /**

         * Asigna el listener para gestionar el evento de movimiento de gr?ficos

         * @param listener

         */

        public void setListener(EnhancedListener listener) {

                getCanvas().addValueChangedListener(listener);

        }

        /**

         * Asigna el nivel de la funci?n si esta es density slicing.

         * @param level

         */

        public void setLevel(int level) {

                if (histogramDrawed != null)

                        histogramDrawed.setLevel(level);

                getCanvas().repaint();

        }

        /**

         * Asigna el tipo de funci?n Lineal, Exponencial, logaritmica, density slicing, campana de gauss, 

         * raiz cuadrada o ecualizaci?n.

         * 

         * @param type Tipo de histograma. El valor est? definido en las constantes de GraphicHistogram

         */

        public void setFunction(int function) {

                if (histogramDrawed == null)

                        return;

                BaseFunction baseFunction = histogramDrawed.getBaseFunction();

                boolean regen = false;

                switch (function) {

                        case GraphicHistogram.FUNCTION_DENSITY:

                                if (!baseFunction.getClass().equals(DensitySlicingLine.class))

                                        baseFunction = new DensitySlicingLine(histogramDrawed.getBaseFunction().getColor());

                                break;

                        case GraphicHistogram.FUNCTION_LINEAL:

                                if (!baseFunction.getClass().equals(StraightLine.class))

                                        baseFunction = new StraightLine(histogramDrawed.getBaseFunction().getColor());

                                break;

                        case GraphicHistogram.FUNCTION_LOGARIT:

                                regen = false;

                                if (!baseFunction.getClass().equals(LogaritmicExponentialLine.class)) {

                                        regen = true;

                                } else {

                                        if (!((LogaritmicExponentialLine) baseFunction).isLogaritmical())

                                                regen = true;

                                }

                                if (regen)

                                        baseFunction = new LogaritmicExponentialLine(histogramDrawed.getBaseFunction().getColor(), 1.0);

                                break;

                        case GraphicHistogram.FUNCTION_EXPONENT:

                                regen = false;

                                if (!baseFunction.getClass().equals(LogaritmicExponentialLine.class)) {

                                        regen = true;

                                } else {

                                        if (!((LogaritmicExponentialLine) baseFunction).isExponencial())

                                                regen = true;

                                }

                                if (regen)

                                        baseFunction = new LogaritmicExponentialLine(histogramDrawed.getBaseFunction().getColor(), -1.0);

                                break;

                        case GraphicHistogram.FUNCTION_SQUARE_ROOT:

                                if (!baseFunction.getClass().equals(SquareRootPowLine.class))

                                        baseFunction = new SquareRootPowLine(histogramDrawed.getBaseFunction().getColor(), 1.0);

                                break;

                }

                histogramDrawed.setBaseFunction(baseFunction);

                getCanvas().replaceDrawableElement(histogramDrawed.getBaseFunction(), BaseFunction.class);

                // Fuerza un repintado inmediato para actualizar los valores

                getCanvas().paint(getCanvas().getGraphics());

        }

}