KeyBoard class:
package keyBoardTypingTutor;
import java.awt.Color;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class KeyBoard {
private final JFrame f = new JFrame("Keyboard");
private final JPanel keyboard = new JPanel();
private Color buttonBackground;
private static JButton[][] b = new JButton[5][40];
private static final String[][] key = {
{"~","1","2","3","4","5","6","7","8","9","0","-","=","Backspace"},
{"Tab","Q","W","E","R","T","Y","U","I","O","P","[","]","\\"},
{"Caps","A","S","D","F","G","H","J","K","L",";","'","Enter"},
{"Shift","Z","X","C","V","B","N","M",",",".","/","\u2191"},
{" ","\u2190","\u2193","\u2192"}
};
public KeyBoard() {
// TODO Auto-generated constructor stub
keyboard.setLayout(new GridBagLayout());
Insets zeroInsets = new Insets(0, 0, 0, 0);
Font monospaced = new Font("Monospaced",Font.PLAIN, 12);
JPanel pRow;
GridBagConstraints cRow = new GridBagConstraints();
GridBagConstraints cButton = new GridBagConstraints();
cRow.anchor = GridBagConstraints.WEST;
cButton.ipady = 21;
for(int row=0; row<key.length; row++){
pRow = new JPanel(new GridBagLayout());
cRow.gridy = row;
for(int col=0; col<key[row].length; col++){
switch(key[row][col]){
case "Backspace":
cButton.ipadx = 0;
break;
case "Tab":
cButton.ipadx = 17;
break;
case "Caps":
cButton.ipadx = 14;
break;
case "Enter":
cButton.ipadx = 27;
break;
case "Shift":
cButton.ipadx = 27;
break;
case "/":
cButton.insets = new Insets(0, 0, 0, 29);
break;
case " ":
cButton.ipadx = 247;
cButton.insets = new Insets(0, 192, 0, 73);
break;
default:
cButton.ipadx = 7;
cButton.insets = zeroInsets;
break;
}
b[row][col] = new JButton(key[row][col]);
b[row][col].setFont(monospaced);
b[row][col].setFocusable(false);
pRow.add(b[row][col], cButton);
// b[row][col].setForeground(Color.WHITE);
// b[row][col].setBackground(Color.DARK_GRAY);
buttonBackground = b[row][col].getBackground();
}
keyboard.add(pRow, cRow);
}
f.add(keyboard);
}
public void pressedButton(int row, int col){
b[row][col].setBackground(Color.BLUE);
b[row][col].setForeground(Color.WHITE);
System.out.print("here");
}
public void releasedButton(int row, int col){
b[row][col].setBackground(buttonBackground);
b[row][col].setForeground(Color.BLACK);
}
public void launch(){
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
f.pack();
f.setResizable(false);
f.setLocationRelativeTo(null);
}
public JPanel getKeyboard() {
return keyboard;
}
public JButton[][] getB() {
return b;
}
}
TextAreaFrame class-->>
package keyBoardTypingTutor;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class TextAreaFrame {
private JTextArea textArea;
private JPanel areaPanel;
private JFrame frame;
private KeyBoard keyBoard;
private JButton[][] b;
public TextAreaFrame() {
// TODO Auto-generated constructor stub
areaPanel = new JPanel();
keyBoard = new KeyBoard();
textArea = new JTextArea(7, 50);
textArea.setLineWrap(true);
textArea.setFont(new Font("SansSerif", Font.PLAIN, 18));
areaPanel.add(textArea);
KeyHandler handler = new KeyHandler();
textArea.addKeyListener(handler);
}
private class KeyHandler implements KeyListener {
public void keyPressed(KeyEvent event) {
// System.out.print(event.getKeyCode());
switch (event.getKeyCode()) {
case KeyEvent.VK_0:
System.out.print(event.getKeyCode());
keyBoard.pressedButton(0, 10);
break;
case KeyEvent.VK_1:
keyBoard.pressedButton(0, 1);
break;
case KeyEvent.VK_2:
keyBoard.pressedButton(0, 2);
break;
case KeyEvent.VK_3:
keyBoard.pressedButton(0, 3);
break;
case KeyEvent.VK_4:
keyBoard.pressedButton(0, 4);
break;
case KeyEvent.VK_5:
keyBoard.pressedButton(0, 5);
break;
case KeyEvent.VK_6:
keyBoard.pressedButton(0, 6);
break;
case KeyEvent.VK_7:
keyBoard.pressedButton(0, 7);
break;
case KeyEvent.VK_8:
keyBoard.pressedButton(0, 8);
break;
case KeyEvent.VK_9:
keyBoard.pressedButton(0, 9);
break;
}
}
public void keyReleased(KeyEvent event) {
// System.out.print(event.getKeyCode());
switch (event.getKeyCode()) {
case KeyEvent.VK_0:
keyBoard.releasedButton(0, 10);
break;
case KeyEvent.VK_1:
keyBoard.releasedButton(0, 1);
break;
case KeyEvent.VK_2:
keyBoard.releasedButton(0, 2);
break;
case KeyEvent.VK_3:
keyBoard.releasedButton(0, 3);
break;
case KeyEvent.VK_4:
keyBoard.releasedButton(0, 4);
break;
case KeyEvent.VK_5:
keyBoard.releasedButton(0, 5);
break;
case KeyEvent.VK_6:
keyBoard.releasedButton(0, 6);
break;
case KeyEvent.VK_7:
keyBoard.releasedButton(0, 7);
break;
case KeyEvent.VK_8:
keyBoard.releasedButton(0, 8);
break;
case KeyEvent.VK_9:
keyBoard.releasedButton(0, 9);
break;
}
}
public void keyTyped(KeyEvent event) {
// System.out.print(event.getKeyCode());
}
}
public JPanel getAreaPanel() {
return areaPanel;
}
// public void launch(){
// frame = new JFrame("Area");
// frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// frame.setVisible(true);
// frame.setSize(800, 300);
// frame.add(areaPanel);
// }
// public static void main(String[] args){
// TextAreaFrame f = new TextAreaFrame();
// f.launch();
// }
}
LabelFrame class-->>
package keyBoardTypingTutor;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
public class LabelFrame {
private JLabel label;
private JPanel panel;
public LabelFrame() {
// TODO Auto-generated constructor stub
String text = "A quick Brown Fox Jumps over the Lazy Dog. Programmers are mentalzz.";
panel = new JPanel();
label = new JLabel(text);
label.setFont(new Font("SansSerif", Font.PLAIN, 18));
label.setHorizontalTextPosition(SwingConstants.LEFT);
panel.add(label);
}
public JPanel getLabelPanel() {
return panel;
}
public JLabel getLabel() {
return label;
}
}
KeyBoardTest class-->>
package keyBoardTypingTutor;
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
public class KeyBoardTest extends JFrame {
private KeyBoard keyBoard;
private TextAreaFrame textAreaFrame;
private LabelFrame labelFrame;
public KeyBoardTest() {
// TODO Auto-generated constructor stub
keyBoard = new KeyBoard();
textAreaFrame = new TextAreaFrame();
labelFrame = new LabelFrame();
add(labelFrame.getLabelPanel(), BorderLayout.PAGE_START);
add(textAreaFrame.getAreaPanel(), BorderLayout.CENTER);
add(keyBoard.getKeyboard(), BorderLayout.PAGE_END);
// keyBoard.getKeyboard().setBackground(Color.GRAY);
// labelFrame.getLabelPanel().setBackground(Color.GRAY);
// labelFrame.getLabel().setForeground(Color.WHITE);
// textAreaFrame.getAreaPanel().setBackground(Color.GRAY);
}
public static void main(String[] args) {
KeyBoardTest test = new KeyBoardTest();
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
test.setVisible(true);
test.pack();
test.setResizable(false);
test.setLocationRelativeTo(null);
// try {
// UIManager
// .setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel");
// SwingUtilities.updateComponentTreeUI(test);
// } catch (Exception e) {
// // TODO: handle exception
// e.printStackTrace();
// }
}
}
In this program, When i press a button in the Physical keyboard, the TextAreaFrame class's KeyEventListener's method keyPressed() and keyReleased() invokes KeyBoard class's pressedButton() and releasedButton() method where i want to change the Button's background color that is pressed currently. But in this program the color is not changing. I have waste a lot time to solve this problem but unable to fix the problem.
You're creating two instances of Keyboard, one in KeyBoardTest which is been displayed on the screen and one in TextAreaFrame which is is not.
public class KeyBoardTest extends JFrame {
private KeyBoard keyBoard;
private TextAreaFrame textAreaFrame;
private LabelFrame labelFrame;
public KeyBoardTest() {
// TODO Auto-generated constructor stub
// This is the keyboard that's on the screen
keyBoard = new KeyBoard();
textAreaFrame = new TextAreaFrame();
labelFrame = new LabelFrame();
add(labelFrame.getLabelPanel(), BorderLayout.PAGE_START);
add(textAreaFrame.getAreaPanel(), BorderLayout.CENTER);
add(keyBoard.getKeyboard(), BorderLayout.PAGE_END);
// keyBoard.getKeyboard().setBackground(Color.GRAY);
// labelFrame.getLabelPanel().setBackground(Color.GRAY);
// labelFrame.getLabel().setForeground(Color.WHITE);
// textAreaFrame.getAreaPanel().setBackground(Color.GRAY);
}
//...
public class TextAreaFrame {
private JTextArea textArea;
private JPanel areaPanel;
private JFrame frame;
private KeyBoard keyBoard;
private JButton[][] b;
public TextAreaFrame() {
// TODO Auto-generated constructor stub
areaPanel = new JPanel();
// This one is not, but is the instance you are trying to
// change...
keyBoard = new KeyBoard();
Instead, pass the instance of KeyBoard which on the screen TextAreaFrame
public class KeyBoardTest extends JFrame {
private KeyBoard keyBoard;
private TextAreaFrame textAreaFrame;
private LabelFrame labelFrame;
public KeyBoardTest() {
// TODO Auto-generated constructor stub
keyBoard = new KeyBoard();
textAreaFrame = new TextAreaFrame(keyBoard);
labelFrame = new LabelFrame();
//...
public class TextAreaFrame {
private JTextArea textArea;
private JPanel areaPanel;
private JFrame frame;
private KeyBoard keyBoard;
private JButton[][] b;
public TextAreaFrame(KeyBoard keyBoard) {
// TODO Auto-generated constructor stub
areaPanel = new JPanel();
this.keyBoard = keyBoard;
Personally, I think you're driving yourself into a deep hole with KeyListener. My personal approach might be to create a key binding for each key stroke your keyboard supports and simply inject that value into the JTextArea and notify the KeyBoard, but that's just me