Application: gvSIG desktop

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

*

* Copyright (C) 2005 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.histogram;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyEvent;

import java.util.ArrayList;

import javax.swing.JButton;

import javax.swing.JComboBox;

import org.gvsig.gui.beans.graphic.GraphicEvent;

import org.gvsig.gui.beans.graphic.GraphicListener;

import org.gvsig.gui.beans.incrementabletask.IncrementableEvent;

import org.gvsig.gui.beans.incrementabletask.IncrementableListener;

import org.gvsig.gui.beans.incrementabletask.IncrementableTask;

import org.gvsig.raster.util.Histogram;

import org.gvsig.raster.util.IHistogramable;

import org.gvsig.rastertools.histogram.ui.HistogramPanel;

/**

 * Listener para eventos del panel de histograma

 *

 * @version 20/03/2007

 * @author Nacho Brodin (brodin_ign@gva.es)

 * @author Borja Sanchez Zamorano (borja.sanchez@iver.es)

 */

public class HistogramPanelListener implements IncrementableListener, GraphicListener, ActionListener {

        private HistogramPanel                histogramPanel = null;

        private IncrementableTask        incrementableTask = null;

        private HistogramProcess        histogramProcess = null;

        private Histogram                                        lastHistogram = null;

        private int                                                                bandCount = 0;

        public boolean                                                comboEventEnable = false;

        private boolean[]                                        showBands = {true, true, true};

        public HistogramPanelListener(HistogramPanel p){

                histogramPanel = p;

        }

        public void setControlListeners(){

                histogramPanel.getGraphicContainer().addValueChangedListener(this);

        }

        private void updateStatistic() {

//                TODO Actualizar tabla de los histogramas.

//                histogramPanel.setStatistic(DatasetStatistics.getBasicStatsFromHistogram(getLastHistogram(), (int)panel.getBoxesValues()[1], (int)panel.getBoxesValues()[0], panel.showBands));

        }

        public void actionPerformed(ActionEvent e) {

                //--------------------------------------

                //Cambiar las bandas en el combo

                JComboBox cbb = histogramPanel.getJComboBands();

                if (comboEventEnable && (e.getSource() == cbb)) {

                        if (cbb.getSelectedItem() == null) return;

                        if (cbb.getSelectedIndex() == 0)

                                for (int i = 0; i < showBands.length; i++)

                                        showBands[i] = true;

                        if (cbb.getSelectedItem().equals("R")) addOrRemoveGraphicBand(0);

                        if (cbb.getSelectedItem().equals("G")) addOrRemoveGraphicBand(1);

                        if (cbb.getSelectedItem().equals("B")) addOrRemoveGraphicBand(2);

                        for (int i = 0; i < HistogramPanel.MAXBANDS; i++)

                                if (cbb.getSelectedItem().equals("Band "+i))

                                        addOrRemoveGraphicBand(i);

                        updateStatistic();

                        updateGraphic();

                        return;

                }

                //--------------------------------------                

                //Limpiar

                JButton clean = histogramPanel.getJButtonClear();

                if (e.getSource() == clean) {

                        cleanChart();

                        return;

                }

                //--------------------------------------

                //Selecci?n de fuente de datos del histograma

                JComboBox cbo = histogramPanel.getJComboBoxOrigen();

                if (comboEventEnable && e.getSource() == cbo) {

                        //En caso de que el histograma se monte a partir de los datos de la vista ponemos RGB en el combo

                        if(cbo.getSelectedIndex() == 0) {

                                histogramPanel.setRGBInBandList();

                        }

                        //En caso de que el histograma se monte a partir de los datos reales ponemos el n?mero de bandas en el combo

                        if (cbo.getSelectedIndex() == 1 || cbo.getSelectedIndex() == 2) {

                                // TODO: Rellenar BandCount con el valor que toca

                                histogramPanel.setBands(bandCount);

                                showBands = new boolean[bandCount];

                                for (int i = 0; i < showBands.length; i++)

                                        showBands[i] = true;

                        }

                        showHistogram();

                        return;

                }

                //--------------------------------------

                //Selecci?n de histograma acumulado y no acumulado

                JComboBox cbt = histogramPanel.getJComboBoxTipo();

                if (comboEventEnable && e.getSource() == cbt) {

                        histogramPanel.setType(cbt.getSelectedIndex());

                        updateStatistic();

                        updateGraphic();

                        return;

                }

        }

        public void showHistogram() {

                if (histogramPanel.getJComboBoxOrigen().getSelectedIndex() < 0) return;

                closeHistogramProcess();

                IHistogramable iaux = (IHistogramable) ((ArrayList) histogramPanel.getComboSource().get(histogramPanel.getJComboBoxOrigen().getSelectedIndex())).get(0);

                histogramProcess = new HistogramProcess(iaux);

                incrementableTask = new IncrementableTask(histogramProcess);

                incrementableTask.addIncrementableListener(this);

                incrementableTask.showWindow();

        }

        /**

         * A?ade o elimina una banda de la visualizaci?n. Si la banda se est? visualizando

         * se elimina y si no entonces se muestra

         * @param band banda a visualizar o borrar del gr?fico

         */

        public void addOrRemoveGraphicBand(int band){

                if (band > showBands.length)

                        return;

                showBands[band] = !showBands[band];

        }

        /**

         * Limpia la gr?fica

         */

        public void cleanChart(){

                histogramPanel.cleanChart();

                for(int i = 0; i < showBands.length; i++)

                        showBands[i] = false;

        }

        private void updateGraphic() {

                long[][] auxHistogram = lastHistogram.getHistogramByType(Histogram.getType(histogramPanel.getJComboBoxTipo().getSelectedIndex()));

                if (auxHistogram == null) return;

                int first = 0;

                int end = auxHistogram[0].length;

                first = (int) ((histogramPanel.getGraphicContainer().getX1()*auxHistogram[0].length)/100);

                end = (int) ((histogramPanel.getGraphicContainer().getX2()*auxHistogram[0].length)/100);

                int bandCount = 0;

                for (int i = 0; i < showBands.length; i++) {

                        if (showBands[i]) bandCount++;

                }

                int[][] newHistogram = new int[bandCount][end - first];

                String[] bandNames = new String[bandCount];

                bandCount = auxHistogram.length;

                int numBand = 0;

                for (int iBand = 0; iBand < showBands.length; iBand++) {

                        if (!showBands[iBand]) continue;

                        for (int j=first; j<end; j++)

                                newHistogram[numBand][j-first] = (int) auxHistogram[iBand][j];

                        bandNames[numBand] = iBand + "";

                        numBand++;

                }

                histogramPanel.getGraphicContainer().getPGraphic().cleanChart();

                histogramPanel.getGraphicContainer().getPGraphic().setNewChart(newHistogram, bandNames);

        }

        private void closeHistogramProcess() {

                histogramProcess = null;

                incrementableTask = null;

        }

        public void actionCanceled(IncrementableEvent e) {

//                if (histogramProcess != null) histogramProcess.suspend();                

                closeHistogramProcess();

        }

        public void actionClosed(IncrementableEvent e) {

                if (histogramProcess == null) return;

                lastHistogram = histogramProcess.getLastHistogram();

                updateGraphic();

                closeHistogramProcess();

        }

        public void actionResumed(IncrementableEvent e) {

                if (histogramProcess == null) return;

                histogramProcess.resume();

        }

        public void actionSuspended(IncrementableEvent e) {

                if (histogramProcess == null) return;

                histogramProcess.suspend();

        }

        public void actionValueChanged(GraphicEvent e) {

                updateStatistic();

                updateGraphic();

        }

}