/**
*Class PrivateDialog
*
*Internetprogrammering 2 - Course
*
*@author Martin Carlsson
*
**/

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

/**
*Class PrivateDialog is a graphical class that when created shows a dialog box
*containing a message to for a user. 
*It is used in the Magnificent Chat application for sending private messages.
*/
public class PrivateDialog extends JDialog implements ActionListener {
        
    private JButton cancel = new JButton("Cancel");
    private JButton send = new JButton("Send");
    private JTextArea messageArea;
    private JScrollPane messageAreaPane = new JScrollPane(messageArea);
    private JTextArea inputArea = new JTextArea();
    private JScrollPane inputAreaPane = new JScrollPane(inputArea);            
    private JPanel centralPanel;
    private JPanel southPanel;
    private JPanel northPanel;            
    public String message, from;
    Container c;
    boolean modal;
    Frame f;
    MagnificentChatApplet gui;
    
     /**
    *Constructs a dialog box
    *@param f the frame the dialog box should open on
    *@param message message that is shown in the dialog box
    *@param from the name of the client that sent the message
    *@param modal should current thread stop when a dialog box is created?
    *@param gui reference to the GUI class
    */
    public PrivateDialog(Frame f, String message, String from, boolean modal, MagnificentChatApplet gui) {
        super(f, "Private message from: " + from, modal);
        this.f = f;
        this.message = message;
        this.from = from;
        this.modal = modal;
        this.gui = gui;
        setPreferredSize(new Dimension (270,320));
        setResizable(false);
        c = getContentPane();
        centralPanel = new JPanel();
        southPanel = new JPanel();
        northPanel = new JPanel();   
        send.addActionListener(this);
        cancel.addActionListener(this);
        messageArea = new JTextArea(message);
        messageArea.setLineWrap(true);
        messageArea.setToolTipText("Private message received"); 
        messageArea.setBorder(BorderFactory.createEmptyBorder(4,4,4,4)); // Invisible border around the message area
        messageArea.setEditable(false);
        messageArea.setBackground(Color.black);
        messageArea.setForeground(Color.white);
        DefaultCaret msgCaret = (DefaultCaret) messageArea.getCaret(); 
        msgCaret.setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE); 
        messageAreaPane = new JScrollPane(messageArea);
        messageAreaPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); 
        messageAreaPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED); 
        messageAreaPane.setPreferredSize(new Dimension(200,100));
        messageArea.setWrapStyleWord(true);
        centralPanel.add(inputAreaPane);
        southPanel.add(send);
        southPanel.add(cancel);
        southPanel.setPreferredSize(new Dimension(200,40));
        inputArea.setLineWrap(true);
        inputArea.setWrapStyleWord(true);
        inputArea.setBorder(BorderFactory.createEmptyBorder(4,4,4,4)); // Invisible border around the input area
        inputAreaPane.setPreferredSize(new Dimension(200,100));
        inputAreaPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); 
        inputAreaPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
        northPanel.add(messageAreaPane);
        c.add(southPanel,BorderLayout.SOUTH);
        c.add(centralPanel, BorderLayout.CENTER);
        c.add(northPanel,BorderLayout.NORTH);
        pack();
        setVisible(true);
        setLocation(f.getLocation().x+f.getWidth()/2-getWidth()/2,
                    f.getLocation().y+f.getHeight()/2-getHeight()/2);
        
    }
    
     /**
    *Listens to the buttons in the dialog box
    *@param event event generated by a user
    */
    public void actionPerformed(ActionEvent event) {
        
        if(event.getSource() == send) {
            String myMessage = inputArea.getText().replace("\n"," ");
            if(myMessage != null && !myMessage.equals("")) {
                if(gui.isUserOnline(from)) {               
                    gui.sendToServer(from + ","+myMessage,gui.PRIVATE);
                    setVisible(false);
                }
                else {
                    inputArea.append("\n\nNO MESSAGE SENT!\n\""+ from + "\" is not online!");
                    from = gui.user;
                }
            }
            else
               Toolkit.getDefaultToolkit().beep();
        }
        else if(event.getSource() == cancel)
            setVisible(false);
    }
} // End class PrivateDialog