gourmetcoffeegui.java

CMU Java课程设计

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

/**
 * Gourmet Coffee System.
 *
 * @author author name
 * @version 1.1.0
 * @see Product
 * @see Coffee
 * @see CoffeeBrewer
 * @see Catalog
 * @see OrderItem
 * @see Order
 * @see Sales
 * @see CatalogLoader
 * @see FileCatalogLoader
 * @see DataFormatException
 * @see SalesFormatter
 * @see PlainTextSalesFormatter
 * @see HTMLSalesFormatter
 * @see XMLSalesFormatter
 */


public class GourmetCoffeeGUI extends JPanel {

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

	/* Window width in pixels */
	static private int WIDTH = 600;

	/* Window height in pixels */
	static private int HEIGHT = 530;

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

	/* Visible rows in catalog list */
	static private int CATALOG_LIST_ROWS = 14;

	/* Size of the order list cell in pixels */
	static private int ORDER_CELL_SIZE = 100;

	/* Visible rows in order list */
	static private int ORDER_LIST_ROWS = 6;

	/* Size quantity text field */
	static private int QUANTITY__TEXTFIELD_SIZE = 5;

	/* Size total text field */
	static private int TOTAL__TEXTFIELD_SIZE = 8;

	/* Rows in status text area rows */
	static private int STATUS_ROWS = 10;

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

	private JList catalogList;
	private JList orderList;
	private JButton addModifyButton;
	private JButton removeButton;
	private JButton registerSaleButton;
	private JButton displaySalesButton;
	private JButton saveSalesButton;
	private JPanel productPanel;
	private JLabel quantityLabel;
	private JLabel totalLabel;
	private JTextField quantityTextField;
	private JTextField totalTextField;
	private JTextArea statusTextArea;
	private JRadioButton  plainRadioButton;
	private JRadioButton  HTMLRadioButton;
	private JRadioButton  XMLRadioButton;

	private JFileChooser  fileChooser;

	private Catalog  catalog;
	private Order  currentOrder;
	private Sales  sales;
	private SalesFormatter salesFormatter;
	private NumberFormat dollarFormatter;

	/**
	 * 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("Gourmet Coffee");

			frame.setContentPane(new GourmetCoffeeGUI(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  GourmetCoffeeGUI(Catalog initialCatalog) {

		// create the components
		catalogList = new JList();
		orderList = new JList();
		catalogList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		catalogList.setVisibleRowCount(CATALOG_LIST_ROWS);
		catalogList.setFixedCellWidth(CATALOG_CELL_SIZE);
		orderList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		orderList.setVisibleRowCount(ORDER_LIST_ROWS);
		orderList.setFixedCellWidth(ORDER_CELL_SIZE);
		addModifyButton = new JButton("Add|Modify Order Item");
		removeButton = new JButton("Remove Order Item");
		registerSaleButton = new JButton("Register Sale of Current Order");
		displaySalesButton = new JButton("Display Sales");
		saveSalesButton = new JButton("Save Sales");
		quantityLabel = new JLabel("Quantity:");
		totalLabel = new JLabel("Total:");
		quantityTextField = new JTextField("", QUANTITY__TEXTFIELD_SIZE);
		totalTextField = new JTextField("$0.00", TOTAL__TEXTFIELD_SIZE);
		totalTextField.setEditable(false);
		statusTextArea = new JTextArea(STATUS_ROWS, STATUS_COLS);
		statusTextArea.setEditable(false);
		plainRadioButton = new JRadioButton("Plain", true);
		HTMLRadioButton = new JRadioButton("HTML");
		XMLRadioButton = new JRadioButton("XML");
		ButtonGroup group = new ButtonGroup();
		group.add(plainRadioButton);
		group.add(HTMLRadioButton);
		group.add(XMLRadioButton);

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

		// Catalog panel
		JPanel catalogPanel = new JPanel();
		catalogPanel.setBorder(BorderFactory.createTitledBorder("Catalog"));
		catalogPanel.add (
			new JScrollPane(catalogList,
				JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
				JScrollPane.HORIZONTAL_SCROLLBAR_NEVER));

		// "Add|Modify Product" panel
		JPanel centralPanel = new JPanel(new BorderLayout());
		JPanel addModifyPanel = new JPanel(new GridLayout(2, 1));
		JPanel quantityPanel = new JPanel();
		quantityPanel.add(quantityLabel);
		quantityPanel.add(quantityTextField);
		addModifyPanel.add(quantityPanel);
		addModifyPanel.add(addModifyButton);
		centralPanel.add(productPanel, BorderLayout.CENTER);
		centralPanel.add(addModifyPanel, BorderLayout.SOUTH);

		// Order panel
		JPanel orderPanel = new JPanel(new BorderLayout());
		orderPanel.setBorder(BorderFactory.createTitledBorder("Order"));
		JPanel totalPanel = new JPanel();
		totalPanel.add(totalLabel);
		totalPanel.add(totalTextField);
		JPanel buttonsPanel = new JPanel(new GridLayout(2, 1));
		buttonsPanel.add(removeButton);
		buttonsPanel.add(registerSaleButton);
		orderPanel.add(totalPanel, BorderLayout.NORTH);
		orderPanel.add(new JScrollPane(orderList,
			JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
			JScrollPane.HORIZONTAL_SCROLLBAR_NEVER), BorderLayout.CENTER);
		orderPanel.add(buttonsPanel, BorderLayout.SOUTH);

		// Status panel
		JPanel bottomPanel = new JPanel(new BorderLayout());
		bottomPanel.setBorder(BorderFactory.createTitledBorder("Status"));
		JPanel salesButtonsPanel = new JPanel(new GridLayout(1, 5));
		salesButtonsPanel.add(plainRadioButton);
		salesButtonsPanel.add(HTMLRadioButton);
		salesButtonsPanel.add(XMLRadioButton);
		salesButtonsPanel.add(displaySalesButton);
		salesButtonsPanel.add(saveSalesButton);
		bottomPanel.add (new JScrollPane(statusTextArea,
			JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
			JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED), BorderLayout.CENTER);
		bottomPanel.add(salesButtonsPanel, BorderLayout.SOUTH);

		// arrange panels in window
		setLayout(new BorderLayout());
		add(catalogPanel, BorderLayout.WEST);
		add(centralPanel, BorderLayout.CENTER);
		add(orderPanel, BorderLayout.EAST);
		add(bottomPanel, BorderLayout.SOUTH);

		// start listening for list and buttons events
		catalogList.addListSelectionListener(new DisplayProductListener());
		addModifyButton.addActionListener(new AddModifyListener());
		removeButton.addActionListener(new RemoveListener());
		registerSaleButton.addActionListener(new RegisterSaleListener());
		displaySalesButton.addActionListener(new DisplaySalesListener());
		saveSalesButton.addActionListener(new SaveSalesListener());
		plainRadioButton.addActionListener(new PlainListener());
		HTMLRadioButton.addActionListener(new HTMLListener());
		XMLRadioButton.addActionListener(new XMLListener());

		// populate the product catalog
		catalog = initialCatalog;
		catalogList.setListData(catalog.getCodes());

		currentOrder = new Order();
		sales = new Sales();
		salesFormatter = PlainTextSalesFormatter.getSingletonInstance();
		fileChooser = new JFileChooser();
		dollarFormatter = NumberFormat.getCurrencyInstance();
	}

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

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

			if (! catalogList.getValueIsAdjusting()) {
				String code = (String) catalogList.getSelectedValue();

				Product product = catalog.getProduct(code);

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

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

	/**
	 * This inner class processes <code>addModifyButton</code> events.
	 */
	class AddModifyListener implements ActionListener {

		/**
		 * Adds an order item to the current order.
		 *
		 * @param event  the event object.
		 */
		public void actionPerformed(ActionEvent event) {


			/* PLACE YOUR CODE HERE */
			try{
				int quantity=Integer.parseInt(quantityTextField.getText());
			    String code = (String) catalogList.getSelectedValue();
		        Product product = catalog.getProduct(code);
		        for(Iterator i = currentOrder.getItemsIterator(); i.hasNext();)
		        {
					OrderItem orderitem=(OrderItem)i.next();
		        	if(orderitem.getProduct().equals(product)){
			        	int curquantity=currentOrder.getItem(product).getQuantity();
			        	currentOrder.getItem(product).setQuantity(curquantity+quantity);
			            orderList.setListData(currentOrder.getItems());
					    totalTextField.setText(dollarFormatter.format(currentOrder.getTotalCost()));
			        	return;
			        	}
		        	}

		        OrderItem item=new OrderItem(product,quantity);
		        currentOrder.addItem(item);
			    orderList.setListData(currentOrder.getItems());
			    totalTextField.setText(dollarFormatter.format(currentOrder.getTotalCost()));

			}
			catch (Exception e)
			{	
				statusTextArea.setText("The number have not input");
			}
			

		}
	}

	/**
	 * This inner class processes <code>removeButton</code> events.
	 */
	class RemoveListener implements ActionListener {

		/**
		 * Removes an order item from the current order.
		 *
		 * @param event  the event object.
		 */
		public void actionPerformed(ActionEvent event) {


			/* PLACE YOUR CODE HERE */
			OrderItem item = (OrderItem)orderList.getSelectedValue();
			if(item==null){
				statusTextArea.setText("You have not selected");
				}
			currentOrder.removeItem(item);
			orderList.setListData(currentOrder.getItems());
			totalTextField.setText(dollarFormatter.format(currentOrder.getTotalCost()));
			
				

		}
	}

	/**
	 * This inner class processes <code>registerSaleButton</code> button events.
	 */
	class RegisterSaleListener implements ActionListener {

		/**
		 * Registers the sale of the current order.
		 *
		 * @param event  the event object.
		 */
		public void actionPerformed(ActionEvent event) {

			if (currentOrder.getNumberOfItems() == 0) {
				statusTextArea.setText("The order is empty.");
			} else {
				sales.addOrder(currentOrder);
				currentOrder = new Order();
				orderList.setListData(currentOrder.getItems());
				totalTextField.setText(dollarFormatter.format(0));
				statusTextArea.setText("The sale has been registered.");
			}
		}
	}

	/**
	 * This inner class processes <code>displaySalesButton</code>events.
	 */
	class DisplaySalesListener implements ActionListener {

		/**
		 * Displays the sales information.
		 *
		 * @param event  the event object.
		 */
		public void actionPerformed(ActionEvent event) {

			if (sales.getNumberOfOrders() == 0) {
				statusTextArea.setText("No orders have been sold.");
			} else {
				statusTextArea.setText(salesFormatter.formatSales(sales));
			}
		}
	}

	/*
	 * This inner class processes <code>saveSalesButton</code>  events.
	 */
	class SaveSalesListener implements ActionListener {

		/**
		 * Saves the sales informations in a file.
		 *
		 * @param event  the event object.
		 */
		public void actionPerformed(ActionEvent event) {


			int result = fileChooser.showSaveDialog(null);
			if (result == JFileChooser.APPROVE_OPTION) {
				try {
					File file = fileChooser.getSelectedFile();
					PrintWriter output = new PrintWriter(new FileWriter(file));
					output.print(statusTextArea.getText());
					output.close();
					} 
				catch (IOException ioe) {
						stdErr.println(ioe.toString());
						}
					}
			}
	}

	/*
	 * This inner class processes <code>plainRadioButton</code> events.
	 */
	class PlainListener implements ActionListener {

		/**
		 * Sets the sales formatter to plain text.
		 *
		 * @param event  the event object.
		 */
		public void actionPerformed(ActionEvent event) {

			salesFormatter = PlainTextSalesFormatter.getSingletonInstance();
		}
	}

	/*
	 * This inner class processes <code>HTMLRadioButton</code> events.
	 */
	class HTMLListener implements ActionListener {

		/**
		 * Sets the sales formatter to HTML.
		 *
		 * @param event  the event object.
		 */
		public void actionPerformed(ActionEvent event) {
			salesFormatter = HTMLSalesFormatter.getSingletonInstance();
		}
	}

	/*
	 * This inner class processes <code>XMLRadioButton</code> events.
	 */
	class XMLListener implements ActionListener {

		/**
		 * Sets the sales formatter to XML.
		 *
		 * @param event  the event object.
		 */
		public void actionPerformed(ActionEvent event) {

			salesFormatter = XMLSalesFormatter.getSingletonInstance();
		}
	}
}