/**
 * TimeEntryPanel provides a data entry panel for Latitude and Longitude.
 * It is always expressed by a subclass (LatitudeField or LongitudeField)<p>
 *
 * Copyright &copy; 1998-89 Martin Minow. All Rights Reserved.<p>
 *
 * Permission to use, copy, modify, and redistribute this software and its
 * documentation for personal, non-commercial use is hereby granted provided that
 * this copyright notice and appropriate documentation appears in all copies. This
 * software may not be distributed for fee or as part of commercial, "shareware,"
 * and/or not-for-profit endevors including, but not limited to, CD-ROM collections,
 * online databases, and subscription services without specific license.<p>
 *
 * Based on DateGUI.java in Mastering JavaBeans.
 * @see <a href="http://www.sybase.com">Sybase</a>, click on
 *  "Catalog>Updates>Mastering JavaBeans".
 * @author <a href="mailto:minow@pobox.com">Martin Minow</a>
 * @version 1.0a0
 * Set tabs every 8 characters.
 */
package org.minow.applets.sunsphere;
import java.beans.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;

public class TimeEntryPanel extends Panel
{
    protected IntegerField	hourField;
    protected IntegerField	minuteField;
    protected IntegerField	secondField;
    
    protected long	    	value;		/* Time in msec.	*/
    
    public TimeEntryPanel()
    {
	this(System.currentTimeMillis());
    }
    public TimeEntryPanel(
    	    Date		javaDate
    	)
    {
    	this(javaDate.getTime());
    }
    public TimeEntryPanel(
    	    long		value
	)
    {	
	hourField	= new IntegerField(3, 0, 0, 24);
	minuteField	= new IntegerField(2, 0, 0, 59);
	secondField	= new IntegerField(2, 0, 0, 59);
	/*
	 * Construct the display Panel.
	 */
	GridBagLayout gridbag	= new GridBagLayout();
	setLayout(gridbag);
	GridBagConstraints c	= new GridBagConstraints();
	c.gridy			= 0;
	c.weightx		= 0.0;
	c.anchor		= GridBagConstraints.WEST;
	c.fill			= GridBagConstraints.NONE;
	addField(c, hourField);
	addField(c, new Label(":"));
	addField(c, minuteField);
	addField(c, new Label(":"));
	addField(c, secondField);
	setTime(value);
    }
    private void addField(
	    GridBagConstraints	c,
	    Component			component
	)
    {
	add(component);
	((GridBagLayout) getLayout()).setConstraints(component, c);
    }
    /*
     * Accessor functions.
     */
    public void setTime(
	    long		value
	)
    {
	this.value		= value % 86400000;
	displayTime();
    }
    public long getTime()
    {
	try {
	    int seconds		= Integer.parseInt(secondField.getText());
	    int minutes		= Integer.parseInt(minuteField.getText());
	    int hours		= Integer.parseInt(hourField.getText());
	    value		=
	    		(hours     * 3600000)
	    		+ (minutes *   60000)
	    		+ (seconds *    1000);
	    		;
	}
	catch (NumberFormatException e) { }
	return (value);
    }
    /*
     * Update the display to reflect the new values.
     * Note: we only support degrees, minutes, and seconds.
     */
    protected void displayTime()
    {
    	int seconds		= (int) ((value / 1000) % 60);
    	int minutes		= (int) ((value / 60000) % 60);
    	int hours		= (int) ((value / 3600000));
	hourField.setText(String.valueOf(hours));
	minuteField.setText(String.valueOf(minutes));
	secondField.setText(String.valueOf(seconds));
    }	
}