I'm having problems with getting my KeyBoardFocusManger to work with my full screen Window. No matter what, it just wont get keyboard input. I used a System.exit(0) and a println() to look for any call to the keypressed/released/typed method, but no errors are thrown. I've tried KeyListeners; but after I read this, I changed to a KeyboardFocusManager, and the same thing still happens. I'm really getting desperate; from what I can judge, the Window is not getting focus of the keyboard?
Here is my main:
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
// Determine if full-screen mode is supported directly
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gs = ge.getDefaultScreenDevice();
if (gs.isFullScreenSupported()) {
Frame frame = new Frame(gs.getDefaultConfiguration());
SpaceInvaderUI spaceInvaderUI = new SpaceInvaderUI(frame);
// Enter full-screen mode
gs.setFullScreenWindow(spaceInvaderUI);
} else {
JOptionPane.showMessageDialog(null, "Does not support full screen!", "Error 0x01", JOptionPane.ERROR_MESSAGE);
System.exit(1);
}
}
});
}
and here is the UI which contains the KeyBoardFocusManger, and is added in addListeners() method:
class SpaceInvaderUI extends Window {
private JPanel drawingPanel;
private Image background;
private JButton btnExit;
public SpaceInvaderUI(Frame frame) {
super(frame);
try {
background = ImageIO.read(getClass().getResourceAsStream("background.png"));
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "Could not extract resource: " + ex.getMessage(), "Error 0x02", JOptionPane.ERROR_MESSAGE);
System.exit(2);
}
createWindow();
}
private void createComponents() throws HeadlessException {
drawingPanel = new DrawingPanel(background, this);
btnExit = new JButton("Exit");
}
private void createWindow() {
createComponents();
addListeners();
addComponentsToWindow();
}
private void addComponentsToWindow() {
add(drawingPanel, BorderLayout.CENTER);
add(btnExit, BorderLayout.SOUTH);
}
private void addListeners() {
KeyboardFocusManager manager = KeyboardFocusManager.getCurrentKeyboardFocusManager();
manager.addKeyEventDispatcher(new MyDispatcher());
btnExit.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
System.exit(0);
}
});
}
private class MyDispatcher implements KeyEventDispatcher {
@Override
public boolean dispatchKeyEvent(KeyEvent e) {
if (e.getID() == KeyEvent.KEY_PRESSED) {
System.out.println("pressed");
System.exit(0);
} else if (e.getID() == KeyEvent.KEY_RELEASED) {
System.out.println("released");
System.exit(0);
} else if (e.getID() == KeyEvent.KEY_TYPED) {
System.out.println("Typed");
System.exit(0);
}
return false;
}
}
}
The exit button is just because I got tired of killing my app via taskmanager. Finally here is my panel on which the game will take place and my background is painted on:
public class DrawingPanel extends JPanel {
private final Image background;
private final SpaceInvaderUI invaderUI;
DrawingPanel(Image background, SpaceInvaderUI invaderUI) {
this.background = background;
this.invaderUI = invaderUI;
}
@Override
protected void paintComponent(Graphics grphcs) {
super.paintComponent(grphcs);
grphcs.drawImage(background.getScaledInstance((int) invaderUI.getWidth(), (int) invaderUI.getHeight(), Image.SCALE_SMOOTH), 0, 0, this);
}
}
Thank you in advance.
EDIT: I have now tried using a keybinding on my drawingPanel but still nothing happens when I press f2:
class SpaceInvaderUI extends Window {
private JPanel drawingPanel;
private Image background;
private JButton btnExit;
public SpaceInvaderUI(Frame frame) {
super(frame);
try {
background = ImageIO.read(getClass().getResourceAsStream("background.png"));
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "Could not extract resource: " + ex.getMessage(), "Error 0x02", JOptionPane.ERROR_MESSAGE);
System.exit(2);
}
createWindow();
}
private void createComponents() throws HeadlessException {
drawingPanel = new DrawingPanel(background, this);
btnExit = new JButton("Exit");
}
private void createWindow() {
createComponents();
addListeners();
addComponentsToWindow();
}
private void addComponentsToWindow() {
add(drawingPanel, BorderLayout.CENTER);
add(btnExit, BorderLayout.SOUTH);
}
private void addListeners() {
Action exit = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
};
drawingPanel.getInputMap().put(KeyStroke.getKeyStroke("F2"),
exit);
btnExit.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
System.exit(0);
}
});
}
}
