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POListener problems with Canvas
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copied!<p>I'm trying to do an multiplayer airHockey game in Java. I already have the server/client socket working. <br/> My frame has a cardLayout with 2 panels, the canvas and the jtable.<br/> I want to do a lan scan to find servers, and then choose the server I want.<br/> I made this scan and put it in a JTable in the cardLayout.<br/> When I start the server it displays the canvas card directly, no problem with listeners.<br/> But when I start the client it checks the lan then displays the jtable card. Once a server is chosed I show the canvas and connect to the server. Here is the problem, no listeners work, neither my windowListener nor the keyListener.<br/></p> <p>I tried many things but without success.</p> <p>EDIT: I just made an SSCCE about the problem:</p> <pre><code>public class test extends Canvas{ public static final int SERVEUR = 10, CLIENT = 20; public static int STATUT; JFrame frame; CardLayout cardsC = new CardLayout(); Container container; JPanel servPanel = null; public BufferStrategy strategy; public test() { Object[] options = {"SERVER", "CLIENT"}; int answer = JOptionPane.showOptionDialog(null, "Choisissez une option:", "Warning", JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]); if(answer == 0){ STATUT = SERVEUR; newFrame(); frame.setVisible(true); gameLoop(); }else if(answer == 1){ STATUT = CLIENT; newFrame(); frame.setVisible(true); cardsC.show(container, "servs"); } } public void connection(){ if(servPanel != null) servPanel.removeAll(); cardsC.show(container, "canvas"); gameLoop(); } private void gameLoop() { while(true){ try {Thread.sleep(10);}catch (InterruptedException e){e.printStackTrace();} } } public void newFrame(){ frame = new JFrame("Space Invaders 101"); frame.setPreferredSize(new Dimension(600,750)); container = frame.getContentPane(); container.setLayout(cardsC); setBounds(0, 0, 600, 750); container.add(this, "canvas"); setIgnoreRepaint(true); frame.pack(); frame.setResizable(false); frame.setLocationRelativeTo(null); if(STATUT == CLIENT){ servPanel = new JPanel(); JButton button = new JButton("Valider"); button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent arg0) { connection(); } }); servPanel.add(button); container.add(servPanel, "servs"); } KeyboardFocusManager manager = KeyboardFocusManager.getCurrentKeyboardFocusManager(); manager.addKeyEventDispatcher(new MyDispatcher()); requestFocusInWindow(); requestFocus(); createBufferStrategy(2); strategy = getBufferStrategy(); cardsC.show(container, "servs"); cardsC.show(container, "canvas"); } private class MyDispatcher implements KeyEventDispatcher { @Override public boolean dispatchKeyEvent(KeyEvent e) { if (e.getID() == KeyEvent.KEY_TYPED){ System.out.println(e.getKeyChar()); } return false; } } public static void main(String argv[]) { new test(); } </code></pre> <p>}</p> <p>So, you can try it, the keyListener is working when you chose SERVER whereas it's not if you chose CLIENT. I figured out that if I don't go in gameLoop the keylistener works. Also when the other card is displayed (not the canvas one) the keyListener works.</p> <p>I'd like to know how I could get the listeners working if I displays first the jtable card.</p> <p>If you need any more information.</p> <p>Thanks in advance,</p>

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