KeyBindings using WHEN_IN_FOCUSED_WINDOW not working for me !!

Question

Hi,
I'm trying to capture "delete" key press event in JBtnPanel class below irrespective of where the current focus is but event is never sent to JBtnPanel class. Any idea where the bug might be ? I print a message to test whether the key is handled by JBtnPanel but NO message is printed. Here as shown towards the end of code snippet, the mainPanel contains childPanel and then the mainPanel is added to contentpane.
     import java.awt.*;
     import java.awt.event.*;
     import javax.swing.*;
     class JBtnPanel extends JPanel {
          JBtnPanel() {
               Action HandleDelete = new AbstractAction() {
                   public void actionPerformed(ActionEvent e) {
                        System.out.println("This is a test !!");
               InputMap input = this.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
               ActionMap action = this.getActionMap();
               input.put(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, KeyEvent.CTRL_MASK),
                         "HandleDelete");
               action.put("HandleDelete", HandleDelete);
     class TextPanel extends JPanel {
          // override the paintComponent method
       // THE MAIN DEMO OF THIS EXAMPLE:
       public void paintComponent(Graphics g) {
         super.paintComponent(g);
         Font f = new Font("SansSerif", Font.BOLD, 14);
         Font fi = new Font("SansSerif", Font.BOLD + Font.ITALIC, 14);
         FontMetrics fm = g.getFontMetrics(f);
         FontMetrics fim = g.getFontMetrics(fi);
         int cx = 75; int cy = 100;
         g.setFont(f);
         g.drawString("Hello, ", cx, cy);
         cx += fm.stringWidth("Hello, ");
         g.setFont(fi);
         g.drawString("World!", cx, cy);
       } //paintComponent
       //=============================================
       ///////////// main ////////////////////////////
       public static void main(String[] args) {
         test f = new test("My Hello World Frame");
         f.show();
       } //main
     } //class TextPanel
              test Class
     class test extends JFrame {
          public void paintComponent(Graphics g) {
               int i = 0;
               ++i;
          public test(String s) {
          // Frame Parameters
          setTitle(s);
          setSize(300,200); // default size is 0,0
          setLocation(10,200); // default is 0,0 (top left corner)
          // Window Listeners
          addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
               System.exit(0);
            } //windowClosing
          }); //addWindowLister
          // Add Panels
          JBtnPanel childPanel = new JBtnPanel();
          childPanel.add(new JButton("Fine"));
          TextPanel mainPanel = new TextPanel();
          mainPanel.add(childPanel);
          Container contentPane = getContentPane();
          contentPane.add(mainPanel);
       } //constructor test
     } //class test

Answer 1

It works for me. Are you wanting "delete" or "control+delete"? Cuz you said delete, but your code says control+delete
input.put(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0), "HandleDelete");