Problem with Focus and KeyListener
Hi !!!
I have a problem. I created game Space Invaders, and it's working fine. But I created a new Form and put a JButton int it. I want when I press button to open/start the game. And that's the problem.... The game starts, but it won't take commands from keyboard, like it has lost KeyListener I think it's something with Focus, I tried setFocusable(), requestFocus() in game's constructor, but nothing. Any idea ?
The code is too big to post it here, so if anybody wants, I can send you code by email, just write... My email is divac12@gmail.com
[572 byte] By [
Divaca] at [2007-10-3 9:38:28]
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Ellipse2D;
import javax.swing.*;
public class FocusControl extends JPanel implements ActionListener {
Ellipse2D.Double ball;
double delta = 2;
FocusControl() {
ball = new Ellipse2D.Double(100, 100, 30, 30);
registerKeys();
setFocusable(true);
}
public void actionPerformed(ActionEvent e) {
System.out.println("button action event");
KeyboardFocusManager kfm =
KeyboardFocusManager.getCurrentKeyboardFocusManager();
kfm.focusNextComponent();
}
private void registerKeys() {
getInputMap().put(KeyStroke.getKeyStroke("UP"), "UP");
getActionMap().put("UP", up);
getInputMap().put(KeyStroke.getKeyStroke("LEFT"), "LEFT");
getActionMap().put("LEFT", left);
getInputMap().put(KeyStroke.getKeyStroke("DOWN"), "DOWN");
getActionMap().put("DOWN", down);
getInputMap().put(KeyStroke.getKeyStroke("RIGHT"), "RIGHT");
getActionMap().put("RIGHT", right);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setPaint(Color.red);
g2.fill(ball);
}
private JPanel getSouth() {
JButton button = new JButton("Button");
button.addActionListener(this);
JPanel panel = new JPanel();
panel.add(button);
return panel;
}
public static void main(String[] args) {
FocusControl test = new FocusControl();
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(test);
f.getContentPane().add(test.getSouth(), "Last");
f.setSize(400,400);
f.setLocation(200,200);
f.setVisible(true);
}
private Action up = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
ball.y -= delta;
repaint();
}
};
private Action left = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
ball.x -= delta;
repaint();
}
};
private Action down = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
ball.y += delta;
repaint();
}
};
private Action right = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
ball.x += delta;
repaint();
}
};
}
