LocationEditor.java

/* 
 * AP(r) Computer Science GridWorld Case Study:
 * Copyright(c) 2005-2006 Cay S. Horstmann (http://horstmann.com)
 *
 * This code 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.
 *
 * This code 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.
 * 
 * @author Cay Horstmann
 */

package info.gridworld.gui;

import info.gridworld.grid.Location;

import java.awt.Component;
import java.beans.PropertyEditorSupport;
import java.text.NumberFormat;
import javax.swing.JFormattedTextField;
import javax.swing.JPanel;

/**
 * A property editor for the Location type. <br />
 * This code is not tested on the AP CS A and AB exams. It contains GUI
 * implementation details that are not intended to be understood by AP CS
 * students.
 */
public class LocationEditor extends PropertyEditorSupport
{
    private JFormattedTextField rowField = new JFormattedTextField(NumberFormat
            .getIntegerInstance());
    private JFormattedTextField colField = new JFormattedTextField(NumberFormat
            .getIntegerInstance());
    private JPanel panel = new JPanel();

    public LocationEditor()
    {
        rowField.setColumns(5);
        colField.setColumns(5);

        panel.add(rowField);
        panel.add(colField);
    }

    public Object getValue()
    {
        int row = ((Number) rowField.getValue()).intValue();
        int col = ((Number) colField.getValue()).intValue();
        return new Location(row, col);
    }

    public void setValue(Object newValue)
    {
        Location loc = (Location) newValue;
        rowField.setValue(new Integer(loc.getRow()));
        colField.setValue(new Integer(loc.getCol()));
    }

    public boolean supportsCustomEditor()
    {
        return true;
    }

    public Component getCustomEditor()
    {
        return panel;
    }
}