mainpanel.java

This project developed in java leads us to realize a flight reservation system in order to emulate d

/*
 * MainPanel.java
 * The package panels contains the different class executing the different windows of each function of the FlightSystem Reservation.
 */
package reservation.system.panels;

import reservation.*;
import reservation.system.functions.*;

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

/**
 * Create the object MainPanel. It define the first window where the user can chose the command to execute and that displays the result of the command.
 * @author Texier Mathieu and Frederic Bidon
 */
public class MainPanel extends Panels {
    
    /** Creates new form MainPanel */
    public MainPanel () {
    }
    
    /**
     * Constructor of this class. Do all the instance for create the graphical window.
     * @param mainDlg Parent object
     */
    public MainPanel (final CustomDialog mainDlg) {
        actionLabel = new JLabel ();
        actionComboBox = new JComboBox ();
        jScrollPane1 = new JScrollPane ();
        resultTextArea = new JTextArea ();
        
        actionLabel.setText ("Action");
        add (actionLabel);
        
        actionComboBox.addActionListener (new ActionListener () {
            public void actionPerformed (ActionEvent evt) {
                Action (mainDlg);
            }
        });
        add (actionComboBox);
        
        resultTextArea.setEditable (false);
        jScrollPane1.setViewportView (resultTextArea);
        add (jScrollPane1);
        init ();
    }
    
    /**
     * Determine the command chosen by the user to create the apropriate window.
     */
    private void Action (CustomDialog mainDlg) {
        int nAction = actionComboBox.getSelectedIndex ();
        String retValue = "Not executed \n";
        JFileChooser chooser = null;
        ExampleFileFilter filter;
        Functions action;
        
        switch (nAction) {
            case CustomDialog.STORE:
                retValue = Store ();
                break;
                
            case CustomDialog.READ_COMMAND:
                retValue = ReadComand ();
                break;
                
            case CustomDialog.RELOAD:
                retValue = Reload ();
                break;
                
            case CustomDialog.CREATE:
            case CustomDialog.RESERVE:
            case CustomDialog.CANCEL:
            case CustomDialog.SELECT:
            case CustomDialog.FLIGHTS:
                CustomDialog dlg = new CustomDialog (mainDlg, true, (String) actionComboBox.getSelectedItem (),nAction);
                dlg.process ();
                retValue = dlg.getRetValue ();
                break;
            default:
                CustomDialog.alert (new Exception ("Wrong slot value."));
        }
        init ();
        resultTextArea.append (retValue);
    }
    
    /**
     * Open a file selector dialog and read interprete the Request Comand Message that are contained
     * @return the appropriate result
     */    
    static public String ReadComand () {
        JFileChooser chooser = new JFileChooser ();
        ExampleFileFilter filter = new ExampleFileFilter ();
        filter.addExtension ("rcm");
        filter.setDescription ("request command message");
        chooser.setFileFilter (filter);
        if(chooser.showOpenDialog (null) == JFileChooser.APPROVE_OPTION) {
            File file = chooser.getSelectedFile ();
            try {
                BufferedReader in = new BufferedReader (new InputStreamReader (new FileInputStream (file)));
                Command mode = new Command (in,Mode.QUIET);
                mode.process ();
                return "File Loaded";
            } catch (FileNotFoundException e){CustomDialog.alert (new Exception ("error while opening file :" + file.getAbsolutePath ()));}
        }
        return "Read command failed";
    }
    
    /**
     * Open a file selector dialog and deserialize the containing Flight System
     * @return the appropriate result
     */    
    static public String Reload () {
        Functions action = new Reload ();
        JFileChooser chooser = new JFileChooser ();
        ExampleFileFilter filter = new ExampleFileFilter ();
        filter.addExtension ("out");
        filter.setDescription ("*.out");
        chooser.setFileFilter (filter);
        if(chooser.showOpenDialog (null) == JFileChooser.APPROVE_OPTION) {
            String fileName[] = new String [1];
            File datafile = chooser.getSelectedFile ();
            fileName[0] = datafile.getAbsolutePath ();
            try {
                return action.execute (fileName) + "\n";
            }catch (Exception e) {CustomDialog.alert (e);}
        }
        return " Reload Failed";
    }
    
    /**
     * Open a file selector dialog and store the serialzed Flight System
     * @return the appropriate result
     */    
    static public String Store () {
        Functions action = new Store ();
        JFileChooser chooser = new JFileChooser ();
        ExampleFileFilter filter = new ExampleFileFilter ();
        filter.addExtension ("out");
        filter.setDescription ("*.out");
        chooser.setFileFilter (filter);
        if(chooser.showSaveDialog (null) == JFileChooser.APPROVE_OPTION) {
            String fileName[] = new String [1];
            File datafile = chooser.getSelectedFile ();
            fileName[0] = datafile.getAbsolutePath ();
            try {
                return action.execute (fileName) + "\n";
            }catch (Exception e) {CustomDialog.alert (e);}
        }
        return "Store failed";
    }
    /**
     * Causes this container to lay out its components.
     */
    public void doLayout () {
        actionLabel.setBounds (30, 10, 80, 20);
        actionComboBox.setBounds (100, 10, 110, 20);
        jScrollPane1.setBounds (20, 40, 450, 90);
    }
    
    /**
     * Set the size of the panel
     * @return an instance of Dimension that represents the minimum size of this container.
     */
    public Dimension getMinimumSize () {
        return new Dimension (500,140);
    }
    
    /**
     * Set the size of the panel
     * @return an instance of Dimension that represents the preferred size of this container.
     */
    public Dimension getPreferredSize () {
        return new Dimension (500,140);
    }
    
    /**
     * Initialize the number of the field and fill them with default values.
     * Dispaly the label of the Window.
     */
    public void init () {
        actionComboBox.removeAllItems ();
        try {
            actionComboBox.insertItemAt ("Reload", CustomDialog.RELOAD);
            actionComboBox.insertItemAt ("Read command", CustomDialog.READ_COMMAND);
            actionComboBox.insertItemAt ("Create", CustomDialog.CREATE);
            if (fs.getFlightList ().length > 0) {
                actionComboBox.insertItemAt ("Store", CustomDialog.STORE);
                actionComboBox.insertItemAt ("Reserve", CustomDialog.RESERVE);
                actionComboBox.insertItemAt ("Flights", CustomDialog.FLIGHTS);
                if (fs.getBookingList ().length > 0) {
                    actionComboBox.insertItemAt ("Cancel", CustomDialog.CANCEL);
                    actionComboBox.insertItemAt ("Select", CustomDialog.SELECT);
                }
            }
        }
        catch (Exception e) {CustomDialog.alert (e);}
    }
    
    /**
     * Proceed the execution of the action
     * @return the result of the request.
     * @param unUsed Not used
     * @throws Exception if the command is not executed.
     */
    public String execute (String[] unUsed) throws Exception {
        return "";
    }
    
    private JComboBox actionComboBox;
    private JLabel actionLabel;
    private JScrollPane jScrollPane1;
    private JTextArea resultTextArea;
}