Mnemonic on button : CTRL + N instead of ALT + N

Question

Hello,
Can anyone help me.
When I push CTRL + N in a screen, I would like a button to be clicked.
A mnenomic is working with ALT + N. But it must be CTRL + N.
Is this possible ?
Grtz

Answer 1

Alt is the standard mnemonic modifier on Windows, so you get this behavior for free from the JDK.
If you want to support other keystrokes, you will need to do this manually. You can do so by inserting entries into the action map and input map of the panel containing your button.
Here's an example that installs an action for Ctrl+N:
package project1;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestPanel extends JPanel
  private final JButton _button = new JButton();
  private final JLabel _label = new JLabel();
  public TestPanel()
    setLayout( new BorderLayout( 0, 15 ) );
    add( _button, BorderLayout.CENTER );
    add( _label, BorderLayout.SOUTH );
    _button.setAction( new AbstractAction( "New" ) {
      public void actionPerformed( ActionEvent e )
        _label.setText( "Clicked!" );
    _button.setMnemonic( 'N' );
    getActionMap().put( "clickButton", _button.getAction() );
    getInputMap( WHEN_ANCESTOR_OF_FOCUSED_COMPONENT ).put(
      KeyStroke.getKeyStroke( "control N" ), "clickButton" );
  public static void main( String[] args )
    JFrame f = new JFrame();
    f.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
    f.setContentPane( new TestPanel() );
    f.pack();
    f.setVisible( true );
}Thanks,
Brian