NumericInputVerifier.java

/*
 *  UFO Saved Game Editor
 *  Copyright (C) 2010 Christopher Davoren
 *
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 */

package net.rubikscomplex.ufosge.gui;

import java.awt.Toolkit;
import java.text.ParseException;
import javax.swing.InputVerifier;
import javax.swing.JComponent;
import javax.swing.JFormattedTextField;
import javax.swing.text.NumberFormatter;
import net.rubikscomplex.ufosge.util.Util;


/**
 *
 * @author Dav
 */
public class NumericInputVerifier extends InputVerifier {
    long maxValue;
    long minValue;

    public NumericInputVerifier(long minValue, long maxValue) {
        super();
        this.maxValue = maxValue;
        this.minValue = minValue;
    }
    
    public boolean verify(JComponent input) {
        JFormattedTextField component = (JFormattedTextField)input;

        String text = component.getText();
        // System.out.println("Text: " + component.getText());

        long num;
        
        if (component.getFormatter() != null) {
            NumberFormatter formatter = (NumberFormatter)component.getFormatter();
            
            try {
                num = ((Number)formatter.stringToValue(text)).longValue();
            }
            catch (ParseException e) {
                Util.displayTooltip(input);
                Toolkit.getDefaultToolkit().beep();
                return false;
            }
        }
        else {
            try {
                num = Long.parseLong(text);
            }
            catch (NumberFormatException e) {
            Util.displayTooltip(input);
                Toolkit.getDefaultToolkit().beep();
                return false;
            }
        }

        if (num < minValue || num > maxValue) {
            // JOptionPane.showMessageDialog(null, "Value must be between " + formatter.valueToString(minValue) + " and " + formatter.valueToString(maxValue));
            Util.displayTooltip(input);
            Toolkit.getDefaultToolkit().beep();
            return false;
        }
        
        return true;
    }
}