exercise 7.cataloggui.java

son los ejercicios de ssd3 espero que les ayuden a algunos jeje se la pasan chido.....!!!!!!

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

/**
 * This class displays the catalog of the gourmet coffee system.
 * 
 * @author Neil
 * @version 1.1.0
 * @see Product
 * @see Coffee
 * @see CoffeeBrewer
 * @see Catalog
 * @see CatalogLoader
 * @see FileCatalogLoader
 * @see DataFormatException
 * @see DataField
 */
public class CatalogGUI extends JPanel {

	/* Standard error stream */
	static private PrintWriter stdErr = new PrintWriter(System.err, true);

	/* Window width in pixels */
	static private int WIDTH = 420;

	/* Window height in pixels */
	static private int HEIGHT = 355;

	/* Size of the list cell in pixels */
	static private int CELL_SIZE = 50;

	/* Visible rows in list */
	static private int LIST_ROWS = 10;

	/* Rows in status text area */
	static private int STATUS_ROWS = 5;

	/* Rows in status text area */
	static private int STATUS_COLS = 40;

	private JList catalogList;
	private JPanel productPanel;
	private JTextArea statusTextArea;

	private Catalog catalog;

	/**
	 * Loads a product catalog and starts the application.
	 * 
	 * @param args
	 *            String arguments. Not used.
	 * @throws IOException
	 *             if there are errors in the loading the catalog.
	 */
	public static void main(String[] args) throws IOException {

		String filename = "";

		if (args.length != 1) {
			filename = "catalog.dat";
		} else {
			filename = args[0];
		}
		try {
			Catalog catalog = (new FileCatalogLoader()).loadCatalog(filename);

			JFrame frame = new JFrame("Catalog Gourmet Coffee");

			frame.setContentPane(new CatalogGUI(catalog));
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			frame.setSize(WIDTH, HEIGHT);
			frame.setResizable(true);
			frame.setVisible(true);

		} catch (FileNotFoundException fnfe) {
			stdErr.println("The file does not exist");

			System.exit(1);

		} catch (DataFormatException dfe) {
			stdErr.println("The file contains malformed data: "
					+ dfe.getMessage());

			System.exit(1);
		}
	}

	/**
	 * Instantiates the components and arranges them in a window.
	 * 
	 * @param initialCatalog
	 *            a product catalog.
	 */
	public CatalogGUI(Catalog initialCatalog) {

		catalog = initialCatalog;

		// create the components
		catalogList = new JList(catalog.getCodes());
		catalogList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		catalogList.setVisibleRowCount(LIST_ROWS);
		catalogList.setFixedCellWidth(CELL_SIZE);
		statusTextArea = new JTextArea(STATUS_ROWS, STATUS_COLS);
		statusTextArea.setEditable(false);

		// create product information panel
		productPanel = new JPanel();
		productPanel.setBorder(BorderFactory
				.createTitledBorder("Product Information"));

		// create panel to hold list and Display button
		JPanel catalogPanel = new JPanel();
		catalogPanel.setBorder(BorderFactory.createTitledBorder("Catalog"));
		catalogPanel.add(new JScrollPane(catalogList,
				JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
				JScrollPane.HORIZONTAL_SCROLLBAR_NEVER));

		setLayout(new BorderLayout());
		add(catalogPanel, BorderLayout.WEST);
		add(productPanel, BorderLayout.CENTER);
		add(statusTextArea, BorderLayout.SOUTH);

		// start listening for list events
		catalogList.addListSelectionListener(new CatalogListListener());
	}

	/*
	 * Obtains a {@link JPanel} object with the information of a product.
	 * 
	 * @param dataFields an {@link ArrayList} of {@link DataField} with the
	 * product information. @return a {@link JPanel} with the product
	 * information.
	 */
	private JPanel getDataFieldsPanel(ArrayList<DataField> dataFields) {

		JPanel result = new JPanel();

		result.setLayout(new BorderLayout(10,0));

		JPanel left = new JPanel();
		JPanel right = new JPanel();

		left.setPreferredSize(new Dimension(80,210));
		right.setPreferredSize(new Dimension(180,220));
		
		left.setLayout(new GridLayout(10, 1));
		right.setLayout(new GridLayout(10, 1));

		for (Iterator<DataField> i = dataFields.iterator(); i.hasNext();) {

			DataField df = i.next();
			JLabel jl = new JLabel();
			JTextField jtf = new JTextField();

			jl.setText(df.getName() + " :");
			jtf.setText(df.getValue());
			jtf.setEditable(false);

			left.add(jl);
			right.add(jtf);
		}

		result.add(left, BorderLayout.WEST);
		result.add(right, BorderLayout.EAST);

		return result;
	}

	/**
	 * This inner class handles list-selection events.
	 */
	class CatalogListListener implements ListSelectionListener {

		/**
		 * Displays the information of the selected product.
		 * 
		 * @param event
		 *            the event object.
		 */
		public void valueChanged(ListSelectionEvent event) {

			String code = (String) catalogList.getSelectedValue();
			Product product = catalog.getProduct(code);

			productPanel.removeAll();
			productPanel.setVisible(false); // Use this
			productPanel.add( // to update
					getDataFieldsPanel(product.getDataFields())); // the panel
			productPanel.setVisible(true); // correctly

			statusTextArea.setText("Product " + code + " has been displayed");
		}
	}
}