Cannot override Ctrl + C in JDialog

Question

Hey guys I cannot override the Ctrl+C function in JDialog for some reason. I can get other combos to work (Ctrl + O) but no cigar with C.
Below is the code I'm using, Im wondering if anyone has any suggestions?
Thanks
          KeyStroke ctrlCKeyStroke = KeyStroke.getKeyStroke(KeyEvent.VK_V, KeyEvent.CTRL_DOWN_MASK, false);          
          Action closeWindow = new AbstractAction()
               public void actionPerformed(ActionEvent e)
                    System.out.println("hello");
                    setVisible(false);
          _mainPanel.getInputMap().put(ctrlCKeyStroke, "none");
          _mainPanel.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
          .put(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK), "CTRLC");

Answer 1

I am no expert in this, but I think that you have to bind the InputMap for the JTextField's Ctrl-C to a null action. This unbinds the keystroke from this component. And then you have to bind it correctly for the containing control, here mainPanel. Something like so perhaps:
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
public class OverrideCtrlC
  private static final String CTRL_C_KEYSTROKE = "Control-C";
  private JPanel mainPanel = new JPanel();
  private JTextField textField = new JTextField(12);
  public OverrideCtrlC()
    mainPanel.add(textField);
    mainPanel.setPreferredSize(new Dimension(300, 200));
    setKeyBindings();
  private void setKeyBindings()
    int inputMapArg = JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT;
    InputMap inputmap = mainPanel.getInputMap(inputMapArg);
    KeyStroke ctrlCStroke = KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK);
    inputmap.put(ctrlCStroke, CTRL_C_KEYSTROKE);
    mainPanel.getActionMap().put(CTRL_C_KEYSTROKE, new CtrlCAction());
    inputmap = textField.getInputMap();
    inputmap.put(ctrlCStroke, "null"); // I don't map this to an action
  private class CtrlCAction extends AbstractAction
    public void actionPerformed(ActionEvent arg0)
      JOptionPane.showMessageDialog(mainPanel, "Control C has been pushed",
          "Ctrl-C Action", JOptionPane.INFORMATION_MESSAGE);
  public JPanel getPanel()
    return mainPanel;
  private static void createAndShowGUI()
    JFrame frame = new JFrame("OverrideCtrlC Application");
    frame.getContentPane().add(new OverrideCtrlC().getPanel());
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  public static void main(String[] args)
    EventQueue.invokeLater(new Runnable()
      public void run()
        createAndShowGUI();
}Edited by: Encephalopathic on Jul 2, 2008 3:39 PM