/* spaceTimeSelector.java
   Paul Carlisle
   
   A control allowing the user to set their location, date and time.
   A composite of the yearSelector, locationSelector, and timeSelector
   classes.
   
*/

import java.awt.*;
import yearSelector;
import timeSelector;
import DateConstants;
import JDate;
import locationSelector;
import textHelpPanel;

public class spaceTimeSelector extends Panel
{
   public static int NONE = 0;
   public static int DATE_SELECTED = 1;
   public static int LOCATION_SELECTED = 2;
   public static int HELP_REQUESTED = 3;
   private int Width;
   private int Height;
   private textHelpPanel help;
   private JDate currentDate;
   private yearSelector yearPanel;
   private timeSelector timePanel;
   private Choice dayPanel;
   private Choice monthPanel;
   private locationSelector locationPanel;
   private GridBagLayout mainLayout;
   private GridBagConstraints mainConstraints;
   private boolean gotMessage = false;
   private int messageID = NONE;
   private Button dateLabel; // These have been changed from Labels to
   private Button timeLabel; // Buttons, because Netscape doesn't recognize
   private Button latLongLabel; // the events when they're Labels.
   
   // Event handling.
   JDate tempDate = new JDate();
   

   spaceTimeSelector(int width, int height, JDate date, Font inputFont, 
					 Font checkFont, Font labelFont, textHelpPanel helpPanel)
   {
	  Width = width;
	  Height = height;
	  currentDate = date;
	  help = helpPanel;
	  
	  yearPanel = new yearSelector(currentDate.getYear(), inputFont, Width);
	  timePanel = new timeSelector(currentDate.getFracTime(),
								   inputFont, checkFont, labelFont, Width);
	  locationPanel = new locationSelector(Width, Height, 42.0, 83.0,
										   inputFont, checkFont);
	  monthPanel = new Choice();
	  dayPanel = new Choice();
	  
	  dateLabel = new Button("Date");
	  dateLabel.setBackground(Color.gray);
	  dateLabel.setFont(checkFont);
	  
	  timeLabel = new Button("Time");
	  timeLabel.setBackground(Color.gray);
	  timeLabel.setFont(checkFont);
	  
	  latLongLabel = new Button("Latitude and Longitude");
	  latLongLabel.setBackground(Color.gray);
	  latLongLabel.setFont(checkFont);
	  
	  monthPanel.setBackground(Color.white);
	  monthPanel.setFont(inputFont);
	  
	  for (int i = 0; i < 12; i++)
		 monthPanel.addItem(DateConstants.MonthNames[i]);
	  
	  monthPanel.select(currentDate.getMonth() - 1);
	  
	  dayPanel.setBackground(Color.white);
	  dayPanel.setFont(inputFont);
	  
	  for (int i = 1; i <= 31; i++)
		 dayPanel.addItem(new String(Integer.toString(i)) );
		 
	  dayPanel.select((int)currentDate.getDay() - 1);
	  
	  mainLayout = new GridBagLayout();
	  mainConstraints = new GridBagConstraints();
	  
	  mainConstraints.fill = GridBagConstraints.NONE;
	  mainConstraints.anchor = GridBagConstraints.CENTER;
	  mainConstraints.gridx = 0;
	  
	  setLayout(mainLayout);
	  
	  // Build the date holder.
	  Panel dateHolder = new Panel();
	  dateHolder.setLayout(new FlowLayout(FlowLayout.CENTER, 10, 4));
	  dateHolder.add(monthPanel);
	  dateHolder.add(dayPanel);
	  
	  // Add the date label.
	  mainConstraints.gridy = 0;
	  mainConstraints.insets = new Insets(0, 5, 0, 5);
	  mainConstraints.fill = GridBagConstraints.HORIZONTAL;
	  mainLayout.setConstraints(dateLabel, mainConstraints);
	  add(dateLabel);
	  
	  // Add the date selector.
	  mainConstraints.gridy = 1;
	  mainConstraints.insets = new Insets(0, 5, 0, 5);
	  mainConstraints.fill = GridBagConstraints.NONE;
	  mainLayout.setConstraints(dateHolder, mainConstraints);
	  add(dateHolder);
	  
	  mainConstraints.gridy = 2;
	  mainConstraints.insets = new Insets(4, 5, 4, 5);
	  mainLayout.setConstraints(yearPanel, mainConstraints);
	  add(yearPanel);
	  
	  // Add the time label.
	  mainConstraints.gridy = 3;
	  mainConstraints.insets = new Insets(0, 5, 4, 5);
	  mainConstraints.fill = GridBagConstraints.HORIZONTAL;
	  mainLayout.setConstraints(timeLabel, mainConstraints);
	  add(timeLabel);
	  
	  // Add the time selector.
	  mainConstraints.gridy = 4;
	  mainConstraints.insets = new Insets(0, 5, 4, 5);
	  mainConstraints.fill = GridBagConstraints.NONE;
	  mainLayout.setConstraints(timePanel, mainConstraints);
	  add(timePanel);
	  
	  // Add the latLong Label.
	  mainConstraints.gridy = 5;
	  mainConstraints.insets = new Insets(0, 5, 4, 5);
	  mainConstraints.fill = GridBagConstraints.HORIZONTAL;
	  mainLayout.setConstraints(latLongLabel, mainConstraints);
	  add(latLongLabel);
	  
	  mainConstraints.gridy = 6;
	  mainConstraints.insets = new Insets(0, 5, 0, 5);
	  mainConstraints.fill = GridBagConstraints.NONE;
	  mainLayout.setConstraints(locationPanel, mainConstraints);
	  add(locationPanel);
	  
	  resize(Width, Height);
   }   
  // Checks to ensure that the date is within the proper range
  // for the selected month. Returns the original date if it
  // is, or the number of days in the month if it isn't. 
   private int checkdate(JDate date, int day)
   {
	  if (day > date.getMonthLength())
		 day = date.getMonthLength();
		 
	  return day;
   }   
   // Return the date the panel is currently set for.
   public JDate getDate()
   {
	  return currentDate;
   }   
   // Return the latitude, in radian measure.
   public double getLatitude()
   {
	  return locationPanel.getLatitude();
   }   
   // Return the longitude, in radian measure.
   public double getLongitude()
   {
	  return locationPanel.getLongitude();
   }   
   // See if we have a message.
   public boolean getMessage()
   {
	  boolean temp = gotMessage;
	  gotMessage = false;
	  return temp;
   }   
  // Return the ID of the last message. 
   public int getMessageID()
   {
	  return messageID;
   }   
   public boolean handleEvent(Event e)
   {
	  if ( (e.id != Event.ACTION_EVENT) && (e.id != Event.MOUSE_DOWN) )
		 return true;
		 
	  if (e.target == dateLabel)
	  {
		 gotMessage = true;
		 messageID = HELP_REQUESTED;
		 help.getHelp("DateDetail");
		 return false;
	  }
	  else if (e.target == timeLabel)
	  {
		 gotMessage = true;
		 messageID = HELP_REQUESTED;
		 help.getHelp("TimeDetail");
		 return false;
	  }
	  else if (e.target == latLongLabel)
	  {
		 gotMessage = true;
		 messageID = HELP_REQUESTED;
		 help.getHelp("LatLongDetail");
		 return false;
	  }
	  
	  tempDate.setDate(yearPanel.getYear(),
					   monthPanel.getSelectedIndex() + 1,
					   1);
	   
	  int tempDay = checkdate(tempDate, dayPanel.getSelectedIndex() + 1);
	  
	  boolean valid = currentDate.setDate(yearPanel.getYear(),
						  monthPanel.getSelectedIndex() + 1,
						  tempDay + timePanel.getTime() );
	 
	  gotMessage = true;
	  messageID = DATE_SELECTED;
	  return false;
   }   
   public void redraw()
   {
	  repaint();
   }   
   // Set the panel to a new date.
   public void setDate(JDate date)
   {
	  currentDate.setJD(date.getJD());
	  monthPanel.select(currentDate.getMonth() - 1);
	  dayPanel.select((int)currentDate.getDay() - 1);
	  yearPanel.setYear(currentDate.getYear());
	  timePanel.setTime(currentDate.getFracTime());
   }   
   // Set the latitude, in radian measure.
   public void setLatitude(double latitude)
   {
	  locationPanel.setLatitude(latitude);
   }   
  // Set the longitude, in radian measure. 
   public void setLongitude(double longitude)
   {
	  locationPanel.setLongitude(longitude);
   }   
   public void update(Graphics g)
   {
	  paint(g);
   }   
}