KeyListener is not respond

[chen young]

Hi,

I created a JDialog with a JComboBox
I add KeyListener support for the JComboBox but there is no response whenever I press any button on the keyboard.

Here is the code:

    
public class Tks extends JDialog implements ActionListener, KeyListener {

	private JPanel jPanel1;
	private JLabel jLabel1;
	private JComboBox findBox;
	private JButton findNextButton;

private void initGUI() {
		getContentPane().setBackground(new java.awt.Color(192, 192, 192));

		jPanel1 = new JPanel();
		getContentPane().add(jPanel1, BorderLayout.CENTER);
		jPanel1.setBorder(BorderFactory.createEtchedBorder(BevelBorder.RAISED));
		DesignGridLayout designGridLayout = new DesignGridLayout(jPanel1);

		jLabel1 = new JLabel();
		jLabel1.setText("Find What:");

		findBox = new JComboBox();
		findBox.setEditable(true);
		findBox.setFocusable(true);
		findBox.addKeyListener(this);

public void keyPressed(KeyEvent arg0) {
		System.out.println("key down was pressed");
	}

	public void keyReleased(KeyEvent arg0) {
		// TODO Auto-generated method stub
		System.out.println("ddddddddddddd");
	}

	public void keyTyped(KeyEvent arg0) {
		// TODO Auto-generated method stub
		System.out.println("ddddddddddddd");
	}

Any suggestion why it’s not responding ?


Thanks

[Gregg Bolinger]

Does the combo box have focus? It will need to be the focused item in order for it to process key input.

[Gregg Bolinger]

Also, depending on what you are trying to accomplish with a KeyListener on a JComboBox you might not be adding the listener to the appropriate element.

[chen young]

The idea is to enable the button when I type any key in the JComboBox

[Gregg Bolinger]

angus young wrote:The idea is to enable the button when I type any key in the JComboBox

Then you probably need to assign the key listener to the editor of the JComboBox. In edit mode, a JComboBox uses a text field and that is the element you need to add the listener to since it is what gains focus.

[chen young]

like this : findBox.getEditor().addActionListener(this); ?

[chen young]

like this : findBox.getEditor().addActionListener(this); ?

[chen young]

like this : findBox.getEditor().addActionListener(this); ?