/**

* Java. Chatter: simple chatbot

*

* @author Sergey Iryupin

* @version 0.2.3 dated Jun 17, 2017

*/

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.text.*; // for StyledDocument

import bot.*;

class SimpleChatBot extends JFrame implements ActionListener {

final String TITLE_OF_PROGRAM = "Chatter: simple chatbot";

final int START_LOCATION = 200;

final int WINDOW_WIDTH = 350;

final int WINDOW_HEIGHT = 450;

final String CHB_AI = "AI";

final String BTN_ENTER = "Enter";

JTextPane dialogue; // area for dialog

JCheckBox ai; // enable/disable AI

JTextField message; // field for entering messages

SimpleBot sbot; // chat-bot class (in bot package)

SimpleAttributeSet botStyle; // style bot text

public static void main(String[] args) {

new SimpleChatBot();

}

/**

* Constructor:

* Creating a window and all the necessary elements on it

*/

SimpleChatBot() {

setTitle(TITLE_OF_PROGRAM);

setDefaultCloseOperation(EXIT_ON_CLOSE);

setBounds(START_LOCATION, START_LOCATION, WINDOW_WIDTH, WINDOW_HEIGHT);

// area for dialog

dialogue = new JTextPane();

dialogue.setEditable(false);

dialogue.setContentType("text/html");

JScrollPane scrollBar = new JScrollPane(dialogue);

// style for bot messages

botStyle = new SimpleAttributeSet();

StyleConstants.setItalic(botStyle, true);

StyleConstants.setForeground(botStyle, Color.blue);

//StyleConstants.setAlignment(botStyle, StyleConstants.ALIGN_RIGHT);

// panel for checkbox, message field and button

JPanel bp = new JPanel();

bp.setLayout(new BoxLayout(bp, BoxLayout.X_AXIS));

ai = new JCheckBox(CHB_AI);

ai.doClick();

message = new JTextField();

message.addActionListener(this);

JButton enter = new JButton(BTN_ENTER);

enter.addActionListener(this);

// adding all elements to the window

bp.add(ai);

bp.add(message);

bp.add(enter);

add(BorderLayout.CENTER, scrollBar);

add(BorderLayout.SOUTH, bp);

setVisible(true);

sbot = new SimpleBot(); // creating bot object

}

/**

* Listener of events from message field and enter button

*/

@Override

public void actionPerformed(ActionEvent event) {

if (message.getText().trim().length() > 0) {

try {

StyledDocument doc = dialogue.getStyledDocument();

doc.insertString(doc.getLength(), message.getText() + "\n",

new SimpleAttributeSet());

doc.insertString(doc.getLength(),

TITLE_OF_PROGRAM.substring(0, 9) +

sbot.sayInReturn(message.getText(), ai.isSelected()) + "\n",

botStyle);

} catch(Exception e) { }

}

message.setText("");

message.requestFocusInWindow();

}

}