// SimpleIntField.java
package util;

import java.awt.*;
import java.awt.event.*;


public class SimpleIntField extends SimpleTextField
{
    public SimpleIntField (String label)
    {
       super(label);
    }

    public SimpleIntField (String label, int initVal)
    {
       super(label, "" + initVal);
    }

    public int getValue()
    {
        try
        {
           return Integer.parseInt(getText());
        }
        catch (NumberFormatException ex)
        {
           return 0;
	}     
    }

    public void setValue (int num)
    {
       setText(Integer.toString(num));
    }

    // override this if you do not want to think about 
    // the underlying text
    public void actionPerformed (int value)
    {}
 
   
    protected void textValueChanged (String text)
    {
       if (text.length() >= 1)
       {
          super.textValueChanged(text);

          // if not a digit, pretend it was not typed 
          if (! Character.isDigit(text.charAt(text.length() - 1)))
          {
	     setText(text.substring(0, text.length() - 1));
          }
       }
    }
}