/**
*	Java Date Chooser Class
*	Written by Jim Adams on 05/01/2005 for Capella University 
*
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Point;
import java.applet.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Calendar;
import java.util.Date;

import javax.swing.*;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;



public class DateChooserApplet extends JApplet
{

	int width, height;		// test
	final int MAX=42;
	
	private JFrame frame 				= new JFrame();
	private JPanel p0 					= new JPanel();				// main panel
	private JPanel p1 					= new JPanel();				// Date panel
	private JPanel p2 					= new JPanel();				// Arrow panel
	private JPanel p3 					= new JPanel();				// Cancel/Select Button Panel
	private GridLayout	 grid1 			= new GridLayout(7,7,1,1);	// day buttons
	private GridLayout	 grid2 			= new GridLayout(1,2,2,2);	// arrow buttons
	//private GridLayout	 grid3 			= new GridLayout(1,4,2,2);	// cancel/select buttons
	private BorderLayout border0 		= new BorderLayout(4,4);	// main panel
	private Point location				= new Point();
	
	private JButton cancelbutton		= new JButton("Cancel");
	private JButton selectbutton		= new JButton("Select");
	private JDialog d 					= new JDialog(frame, null, true); 
	
	private JButton[] daybutton 		= new JButton[MAX];
	private JButton[] headbutt 			= new JButton[7];
	
	private Font verdana8bold      		= new Font("Verdana", Font.BOLD, 8);
	private Font verdana9plain     		= new Font("Verdana", Font.PLAIN, 9);
	private Font verdana9bold      		= new Font("Verdana", Font.BOLD, 9);
	private Font verdana10plain     	= new Font("Verdana", Font.PLAIN, 10);
	private Font verdana10bold     		= new Font("Verdana", Font.BOLD, 10);
	private Font verdana11bold     		= new Font("Verdana", Font.BOLD, 11);
	private Font courier10bold     		= new Font("Courier New", Font.BOLD, 10);
	private Font courier10plain     	= new Font("Courier New", Font.PLAIN, 10);
	private Font courier11plain     	= new Font("Courier New", Font.PLAIN, 11);
	
	
	private Color red           		= new Color(255,0,0);
	private Color blue           		= new Color(0,0,255);
	private Color lightblue           	= new Color(144,144,255);
	private Color lightgrey           	= new Color(240,248,240);
	private Color white           		= new Color(255,255,255);
	private Color black           		= new Color(0,0,0);
    
	private String selected_month		="";
	private String selected_day			="";
	private String selected_year		="";
	private Date global_date			= new Date();
	
	


	


	
	public void init() {
	    set_look_and_feel();
		this.location.x = 400;
		this.location.y = 400;
		display();
		
	}
	
	
	
	
	public void paint( Graphics g ) {
		set_look_and_feel();
		//display();
	}
	
	
	
	
	
	/** 
	 Display the Calendar
	 @date 04/28/2005
	 @author Jim Adams
	 @param None
	 @return Nothing
	*/
	public void display()
	{
		String[] headers	= {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
		
		//	Get current date
		Calendar today 		= Calendar.getInstance();
		int	curmonth		= today.get(Calendar.MONTH);
		int	curday			= today.get(Calendar.DAY_OF_MONTH);
		int	curyear			= today.get(Calendar.YEAR);
	
		this.selected_month	= Integer.toString(curmonth+1);
		this.selected_day	= Integer.toString(curday);
		this.selected_year	= Integer.toString(curyear);
		
		set_title();
		
		p0.setLayout(border0);
		p1.setLayout(grid1);
		
		// add header row
		Insets insets		= new Insets(1,0,2,0);	// top, left, bot, right
		
		int	j=0;
		for (j=0;  j<7;  j++)
		{
			headbutt[j] = new JButton();
			headbutt[j].setText(headers[j]);
			headbutt[j].setFont(verdana9bold);
			headbutt[j].setMargin(insets);
			p1.add(headbutt[j]);
		}
		
		// aded data rows
		for (j=0; j<MAX; j++)
		{
			daybutton[j] = new JButton();
			daybutton[j].setSize(5,5);
			daybutton[j].setFont(verdana9plain);
			daybutton[j].setMargin(insets);
			daybutton[j].addActionListener(new CalendarListener());
			p1.add(daybutton[j]);
		}
		
		set_calendar_buttons(today);
		
		//String path				= System.getProperty("user.dir") ;
		Icon leftIcon			= new ImageIcon(getDocumentBase(), "images/left2.gif");
		Icon rightIcon			= new ImageIcon(getDocumentBase(), "images/right2.gif");
		
		JButton leftArrow		= new JButton(" << Previous Month");
		JButton rightArrow		= new JButton("Next Month >>");
		leftArrow.addActionListener(new ButtonListener());
		rightArrow.addActionListener(new ButtonListener());
		
		rightArrow.setBackground(white);
		leftArrow.setBackground(white);
		rightArrow.setFont(verdana9plain);
		leftArrow.setFont(verdana9plain);
		//rightArrow.setIcon(rightIcon);
		//leftArrow.setIcon(leftIcon);
		rightArrow.setHorizontalTextPosition(SwingConstants.LEFT);

		p2.setLayout(grid2);
		p2.add(leftArrow);
		p2.add(rightArrow);
		
		cancelbutton.setFont(verdana9plain);
		selectbutton.setFont(verdana9plain);
		cancelbutton.addActionListener(new CancelListener());
		selectbutton.addActionListener(new SelectListener());
		selectbutton.setFocusable(true);
		selectbutton.setEnabled(true);
		selectbutton.grabFocus();
		p3.add(cancelbutton);
		p3.add(selectbutton);
	
		p0.add(p2, BorderLayout.NORTH);
		p0.add(p1, BorderLayout.CENTER);
		p0.add(p3, BorderLayout.SOUTH);
		

		set_title();
	    d.setLocation(location);                    // x, y start location
	    d.setSize(300,250);
	    d.getContentPane().add( p0 );
	    d.setResizable(false);
	    d.setVisible(true);
	    d.pack();		
	}	// end of method
   
	
	
	
	
	
	
	/** 
	 Set all the calendar buttons to 1 through the highest day of the month
	 @date 04/28/2005
	 @author Jim Adams
	 @param Calendar Object
	 @return Nothong. Sets Global JButton Array
	*/
	private void set_calendar_buttons(Calendar cal)
	{
		Calendar today 		= Calendar.getInstance();
		int todays_date 	= today.get(Calendar.DAY_OF_MONTH);
		int todays_month 	= today.get(Calendar.MONTH);
		
		
		cal.set(Calendar.DAY_OF_MONTH, 1);
		int startday		= cal.get(Calendar.DAY_OF_WEEK);				
		int days_in_month	= cal.getActualMaximum(Calendar.DAY_OF_MONTH);	// day in month
		
		// clear the buttons, first
		for (int j=0; j<MAX; j++)
		{
			daybutton[j].setText("");
			daybutton[j].setFont(verdana9plain);
			daybutton[j].setForeground(black);
		}
		
		
		// now set the buttons
		int	idx=startday-1;
		for (int dom=1; dom<=days_in_month;  dom++)
		{
			daybutton[idx].setText(Integer.toString(dom));
			if (dom == todays_date)
			{
				daybutton[idx].setFont(verdana10bold);
				daybutton[idx].setForeground(red);
			}
			else
				daybutton[idx].setFont(verdana9plain);
			idx++;
		}
	}	// end of method
	
	
	
	
	
	
	
   
	/** 
	 Set the windows look and feel
	 @date 03/18/2005
	 @author Jim Adams
	 @param None
	 @return Nothing
	*/
	private void set_look_and_feel()
	{
		try
		{
			//UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
			UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
		}
			catch (Exception e) 
			{ 
				//  Empty Comment
			}
	}	 // end of method

	
	
	
	
	

	/** 
	 Set the windows look and feel
	 @date 03/18/2005
	 @author Jim Adams
	 @param None
	 @return Nothing
	*/
	private void set_title()
	{
		String[] month 		= {"January", "February", "March", "April", "May", "June", 
							   "July", "August", "September", "October", "November", "December"} ;		
		int m				= Integer.parseInt(selected_month);
		m--;
		
		String month_str	= month[m];
		String title 		= month_str + " " + selected_day + ", " + selected_year;
		d.setTitle(title);
	}	// end of method
	
	
	
	
	
	

	/** 
	 Get the selected day
	 @date 04/28/2005
	 @author Jim Adams
	 @param None
	 @return String with day
	*/
	public String getDay()
	{
		return(selected_day);
	}	// end of method
	
	
	
	
	
	
	/** 
	 Get the selected month
	 @date 04/28/2005
	 @author Jim Adams
	 @param None
	 @return String with month
	*/
	public String getMonth()
	{
		return(selected_month);
	}	// end of method
	
	
	
	
	

	/** 
	 Get the selected year
	 @date 04/28/2005
	 @author Jim Adams
	 @param None
	 @return String with year
	*/
	public String getYear()
	{
		return(selected_year);
	}	// end of method
	
	
	
	
	
	
	
	
	/** 
	 Get the entire date object
	 @date 05/02/2005
	 @author Jim Adams
	 @param None
	 @return Date Object
	*/
	public Date getDate()
	{
		return(global_date);
	}	// end of method
	
	
	
	
	
	
	
	
	
	
	/** 
	 Action Listener for The Calendar Day Buttons
	 @date 04/28/2005
	 @param None
	 @author Jim Adams
	*/
	private class CalendarListener implements ActionListener
	{
		public void actionPerformed( ActionEvent e )
		{
			JButton jb 			= (JButton) e.getSource();
			selected_day 		= jb.getText();
			
			Calendar newday 	= Calendar.getInstance();
			newday.set(Calendar.DAY_OF_MONTH, Integer.parseInt(selected_day));
			newday.set(Calendar.YEAR, Integer.parseInt(selected_year));
			newday.set(Calendar.MONTH, Integer.parseInt(selected_month)-1);
		
			set_calendar_buttons(newday);
			set_title();
		}
	}	// end of method
	
	
	
	
	
	
	
	/** 
	 Action Listener for The Calendar Forward & Reverse Buttons
	 @date 04/28/2005
	 @param None
	 @author Jim Adams
	*/
	private class ButtonListener implements ActionListener
	{
		public void actionPerformed( ActionEvent e )
		{
			int		m;
			int		d;
			int		y;
			
			m				= Integer.parseInt(selected_month);
			d				= Integer.parseInt(selected_day);
			y				= Integer.parseInt(selected_year);
			
			JButton jb 		=  (JButton) e.getSource();
			
			if (jb.getText().contains("Previous"))
			{
				m--;
				if (m < 1)
				{
					y--;
					m=12;
				}
			}
			else
			{
				m++;
				if (m > 12)
				{
					y++;
					m=1;
				}
			}
			
			selected_month		= String.valueOf(m);
			selected_day		= String.valueOf(d);
			selected_year		= String.valueOf(y);
	
			Calendar newday 	= Calendar.getInstance();
			newday.set(Calendar.DAY_OF_MONTH, d);
			newday.set(Calendar.MONTH, m-1);
			newday.set(Calendar.YEAR, y);

			set_calendar_buttons(newday);
			set_title();
		}
	}	// end of method
	
	
	
	
	
	/** 
	 Action Listener for The Cancel Button
	 @date 04/28/2005
	 @param None
	 @author Jim Adams
	*/
	private class CancelListener implements ActionListener
	{
		public void actionPerformed( ActionEvent e )
		{
			frame.setVisible(false);
		}
	}	// end of method
	
	
	
	
	
	
	/** 
	 Action Listener for The Calendar Select Button
	 Sets some global date variables
	 @date 04/28/2005
	 @param None
	 @author Jim Adams
	*/
	private class SelectListener implements ActionListener
	{
		public void actionPerformed( ActionEvent e )
		{
		
			global_date.setYear(Integer.parseInt(selected_year)-1900);
			global_date.setMonth(Integer.parseInt(selected_month)-1);
			global_date.setDate(Integer.parseInt(selected_day));
			
			frame.setVisible(false);
		}
	}	// end of method
	
	
	
}