package examples;

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ex42c implements ItemListener, ActionListener
{
	private JMenuItem exit;
	private JMenuItem open;
	private JMenuItem colorItem;
	private JRadioButtonMenuItem[] fonts;
	private JCheckBoxMenuItem bold;
	private JCheckBoxMenuItem italic;
	private JLabel label;
	
	private static Color[] colorValues = {Color.black, Color.white, Color.red, 
														Color.blue, Color.green};
	public ex42c()
	{
		JFrame window = new JFrame("Example 42c");
		window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		colorItem = new JMenuItem("Color...");
		colorItem.addActionListener(this);
		
		open = new JMenuItem("Open...");
		open.addActionListener(this);
		/*
		 * Create another group for the text font
		 */
		ButtonGroup fontGroup = new ButtonGroup();
		fonts = new JRadioButtonMenuItem[4];
		fonts[0] = new JRadioButtonMenuItem("Sans");
		fonts[0].setSelected(true);
		fonts[0].addItemListener(this);
		fontGroup.add(fonts[0]);
		
		fonts[1] = new JRadioButtonMenuItem("Serif");
		fonts[1].addItemListener(this);
		fontGroup.add(fonts[1]);
		
		fonts[2] = new JRadioButtonMenuItem("Monospaced");
		fonts[2].addItemListener(this);
		fontGroup.add(fonts[2]);
		
		fonts[3] = new JRadioButtonMenuItem("Comic Sans MS");
		fonts[3].addItemListener(this);
		fontGroup.add(fonts[3]);

		/*
		 * As we've seen with previous examples, different styles can be applied 
		 * simultaneously, which makes JCheckBoxMenuItems a good choice to use here.
		 */
		bold = new JCheckBoxMenuItem("Bold");
		bold.addItemListener(this);
		
		italic = new JCheckBoxMenuItem("Italics");
		italic.addItemListener(this);
		
		//create a MenuItem that lets the user exit the program
		exit = new JMenuItem("Exit");
		exit.addActionListener(this);
		
		/*
		 * With all of the menu items created, we start grouping them into JMenus.
		 * A 'File' menu will contain the exit JMenuItem that exits the program.
		 */
		JMenu fileMenu = new JMenu("File");
		fileMenu.add(open);
		fileMenu.addSeparator();
		fileMenu.add(exit);
		
		/*
		 * Create a font menu to display all the Font options
		 */
		JMenu fontMenu = new JMenu("Font");
		for(AbstractButton a : fonts)
			fontMenu.add(a);
		fontMenu.addSeparator();
		fontMenu.add(bold);
		fontMenu.add(italic);
		
		/*
		 * The Font and Color menus are contained as submenus in a Format menu
		 * created here. 
		 */
		JMenu formatMenu = new JMenu("Format");
		formatMenu.add(colorItem);
		formatMenu.add(fontMenu);
		
		/*
		 * The two upper level menus are then added to a menu bar
		 */
		JMenuBar menubar = new JMenuBar();
		menubar.add(fileMenu);
		menubar.add(formatMenu);
		
		//add the menu bar to the window.
		window.setJMenuBar(menubar);
		
		label = new JLabel("Text To Change", JLabel.CENTER);
		label.setFont(new Font("Sans", Font.PLAIN, 50));
		window.getContentPane().add(label, BorderLayout.CENTER);
		
		window.setSize(500, 200);
		window.setVisible(true);
	}
	
	public void actionPerformed(ActionEvent e)
	{
		Object o = e.getSource();
		if(o == open)
		{
			JFileChooser fc = new JFileChooser();
			int ret = fc.showOpenDialog(null);
			
			if(ret == JFileChooser.APPROVE_OPTION)
			{
				File file = fc.getSelectedFile();
				fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
				label.setText(file.getName());
			}
		}
		else if(o == colorItem)
		{
			Color c = 
				JColorChooser.showDialog(null, "Pick Color", label.getForeground());
			label.setForeground(c);
		}
		else
			System.exit(0);
	}
	
	public void itemStateChanged(ItemEvent e)
	{
		String fontName = null;
		
		/*
		 * With each event that occurs, we don't bother checking the source of the
		 * event. Instead, we simply find the selected font and color from their 
		 * respective groups, compute the style of the text, and set the new Font
		 * object for the JLabel.
		 */
		
		for(AbstractButton a : fonts)
			if(a.isSelected())
				fontName = a.getText();
		
		int style = Font.PLAIN;
		
		if(bold.isSelected())
			style += Font.BOLD;
		if(italic.isSelected())
			style += Font.ITALIC;
		
		
		label.setFont(new Font(fontName, style, 50));	
	}
	
	public static void main(String[] args)
	{
		new ex42c();
	}
}