AVR Z-LINK®

ChatWindow.java

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/* This file has been prepared for Doxygen automatic documentation generation.*/
package gui;

import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.net.URL;

import javax.swing.AbstractAction;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.event.EventListenerList;

public class ChatWindow extends JPanel implements ActionListener{

        private static final long serialVersionUID = 1L;
        
        private JTextArea conversation, message;
        private JButton 
                clear = new JButton( "Clear" ), 
                send = new JButton( "Send" );
        private JLabel imageAVR;
        private JLabel imageAtmel;
        private Font textFont;
        
        private EventListenerList ChatWindowEventListeners = new EventListenerList( );

        public ChatWindow( ){
                
                this.setSize( new Dimension( 600, 400 ) );
                this.setLayout( null );
                
                message = new JTextArea( "" );
                message.setEditable( false );
                
//              Add enter to input map. So that it is possible to send messages using the eneter key.
                message.getInputMap().put( KeyStroke.getKeyStroke( KeyEvent.VK_ENTER, 0),
                                                                                                                  "enter" );

//              Connect the key event with an action.           
                message.getActionMap( ).put( "enter", new AbstractAction( ){
           
//                      Suppress warning
                        private static final long serialVersionUID = 1L;

                        public void actionPerformed( ActionEvent ae ){
                                //Send new event to the EventHandler.
                                fireChatWindowEvent( new ChatWindowEvent( ChatWindowEvent.ENTER, message.getText() ) );
            }
        } );
                
                conversation = new JTextArea( "" );
                conversation.setEditable( false );
                
                JScrollPane conversationBackground = new JScrollPane( conversation );
                conversationBackground.setBounds( 151, 10, 399, 260 );
                
                message.setBounds( 151, 272, 290, 64 );
                
                clear.setBounds( 450, 294, 100, 20 );
                clear.addActionListener( this );
                
                send.setBounds( 450, 272, 100, 20 );
                send.addActionListener( this );
                
                URL avrLogoURL = ChatWindow.class.getResource( "AVR_logo_black.gif" );
                
                ImageIcon avrLogo = new ImageIcon( avrLogoURL );
                imageAVR = new JLabel( avrLogo );
                imageAVR.setBounds( 8, 100, 135, 97 );
                
                URL atmelURL = ChatWindow.class.getResource( "Atmel_logo_black.gif" );
                
                ImageIcon atmelLogo = new ImageIcon( atmelURL );
                imageAtmel = new JLabel( atmelLogo );
                imageAtmel.setBounds( 8, 0, 135, 97 );
                
                textFont = new Font( "Monospaced", Font.BOLD, 14 );
                conversation.setFont( textFont );
                message.setFont( textFont );
                
                this.add( conversationBackground );
                this.add( message );
                this.add( clear );
                this.add( send );
                this.add( imageAVR );
                this.add( imageAtmel );
        }
        
        public void appendTextToConversation( String msg ){
                
                conversation.setText( conversation.getText( ) + msg );  
        }
        
        public void clearConversation( ){
                conversation.setText( "" );
        }
        
        public void clearMessage( ){
                message.setText("");
        }
        
        public String getMessage( ){
                return message.getText( );
        }
        
        public void appendIncommingMessage( String iMsg ){
                appendTextToConversation( " -> " + iMsg + "\r\n" );
        }
        
        public void appendOutgoingMessage( String oMsg ){
                appendTextToConversation( " <- " + oMsg + "\r\n" );
        }
        
        public void enableMessageWindow( ){
                message.setEditable( true );
        }
        
        public void disableMessageWindow( ){
                message.setEditable( false );
        }

        public void actionPerformed( ActionEvent ae ){

                String event = ae.getActionCommand( ).toString( );
                
                if( event.equals( "Send" ) ){
                        
                        fireChatWindowEvent( new ChatWindowEvent( ChatWindowEvent.SEND, message.getText( ) ) );
                }

                else{
                        
                        fireChatWindowEvent( new ChatWindowEvent( ChatWindowEvent.CLEAR, null ) );
                }
        }
        
        public void addChatWindowEventListener( ChatWindowEventListener cweListener ){
                ChatWindowEventListeners.add( ChatWindowEventListener.class, cweListener );
        }
        
        public void removeChatWindowEventListener( ChatWindowEventListener cweListener ){
                ChatWindowEventListeners.remove( ChatWindowEventListener.class, cweListener );
        }
        
        protected void fireChatWindowEvent( ChatWindowEvent event ){
                
                Object[ ] listeners = ChatWindowEventListeners.getListenerList( );
                int numberOfListeners = listeners.length;
                
                for( int i = 0; i < numberOfListeners; i+=2 ){
                        
                        if( listeners[ i ] == ChatWindowEventListener.class ){
                                ( (ChatWindowEventListener)listeners[ i + 1 ] ).ChatWindowEvent( event );
                        }
                }
        }
}