Application: gvSIG desktop

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

 *

 * Copyright (C) 2006 Instituto de Desarrollo Regional 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.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   Instituto de Desarrollo Regional (Universidad de Castilla La-Mancha)

 *   Campus Universitario s/n

 *   02071 Alabacete

 *   Spain

 *

 *   +34 967 599 200

 */

package es.idr.teledeteccion.gridmath.gui.listener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import java.util.HashMap;

import java.util.Iterator;

import javax.swing.JTable;

import javax.swing.table.DefaultTableModel;

import org.nfunk.jep.Variable;

import es.idr.teledeteccion.gridmath.gui.CalculatorPanel;

/**

 * 

 * Escucha los cambios en el texto de la expresi?n para actualizar la tabla de variables.

 * 

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

 *

 */

public class GridMathListener implements KeyListener{

        CalculatorPanel panel = null;

        public GridMathListener(CalculatorPanel panel) {

                this.panel = panel;

        }

        public void keyPressed(KeyEvent e) {

                // TODO Auto-generated method stub

        }

        public void keyReleased(KeyEvent e) {

                JTable table = null;

                HashMap qWindowsHash = null;

                String expression = null;

                expression= panel.getJTextExpression().getText();

                table = panel.getJTableVariables().getTableFormat();

                qWindowsHash = panel.getQWindowsHash();

                panel.getParser().getSymbolTable().clear();

                if(!expression.equals("")){

                        panel.getParser().parseExpression(panel.getJTextExpression().getText());

                        if(!panel.getParser().hasError()){

                                //Actualizar la tabla de variables:

                                for (Iterator vars = panel.getParser().getSymbolTable().values().iterator(); vars.hasNext();) {

                                        Variable var = (Variable) vars.next();

                                        if (!qWindowsHash.containsKey(var.getName())){

                                                qWindowsHash.put(var.getName(),null);

                                                panel.getJTableVariables().InsertRow(var.getName(),"");

                                        }

                                }

                                for(int i=0;i<table.getRowCount();i++){

                                        String var = table.getValueAt(i,0).toString();

                                        if         (!panel.getParser().getSymbolTable().keySet().contains(var)){

                                                ((DefaultTableModel)table.getModel()).removeRow(i);

                                                qWindowsHash.remove(var);

                                        }

                                }

                                panel.getJTableVariables().getTableFormat().updateUI();

                        }

                }

                else{                

                        for (int i= 0;i<table.getRowCount();i++)

                                ((DefaultTableModel)table.getModel()).removeRow(i);

                        qWindowsHash.clear();

                        panel.getJTableVariables().getTableFormat().updateUI();

                }

        }

        public void keyTyped(KeyEvent e) {

        }

}