JComboBox search for match list

[mine0926]

Hi, here again :)
I am trying to search equivalent list in JCombobox based on user input. JComboBox is set to editable. JComboBox' KeyListener does not work, ActionListener works on lost focus. I have no idea what to search in google. I am totally clueless now.

Here is what I try:

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class JComboTrial extends JFrame implements ActionListener, KeyListener
{	JComboBox jc1 = null;
	JButton b1 = new JButton("OK");
	JPanel p = new JPanel();

	public JComboTrial()
	{	String[] strList = {"DE 0001", "DF 0504", "DF 0604", "FR 5971", "GE 0587", "GKL 684"};
		jc1 = new JComboBox(strList);

		jc1.addActionListener(this);
		jc1.addKeyListener(this);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setLayout(new BorderLayout());
		this.add(p, BorderLayout.CENTER);
		p.setLayout(new BorderLayout());
		p.add(jc1, BorderLayout.CENTER);
		p.add(b1, BorderLayout.LINE_END);
		pack();

		jc1.setEditable(true);

	}

	public void actionPerformed(ActionEvent ae)
	{	System.out.println("From Action event");
		cmbSelectInput(jc1, jc1.getSelectedItem().toString());
	}

	public void keyTyped(KeyEvent ae)
	{	System.out.println("FROM Typed");
		cmbSelectInput(jc1, jc1.getSelectedItem().toString());
	}

	public void keyPressed(KeyEvent ae)
	{	System.out.println("FROM Pressed");
		cmbSelectInput(jc1, jc1.getSelectedItem().toString());
	}

	public void keyReleased(KeyEvent ae)
	{	System.out.println("FROM Released");
		cmbSelectInput(jc1, jc1.getSelectedItem().toString());
	}

    	void cmbSelectInput(JComboBox combo, String input)
    	{   	int cmb_count = combo.getItemCount() - 1;
        		int inputlen = combo.getSelectedItem().toString().length()-1;
        		String combo_item = null;
        		for(int i=0; i < cmb_count; i++)
        		{	combo_item = combo.getItemAt(i).toString().substring(0, inputlen);
            			if(input.equals(combo_item))
            			{   	combo.setSelectedIndex(i);
                			break;
            			}
        		}
    	}//end of cmbSelectInput

	public static void main(String[] args)
	{	new JComboTrial().setVisible(true);
	}

}

Thanks in advance,
geje

[alacn]

click the below link it explains there

KeyListener in JComboBox « Chad.Stever

[Norm]

JComboBox is set to editable. JComboBox' KeyListener does not work

Are these incompatible? Who is to get the key strokes, the JComboBox or your listener?
What happens if its not editable?

[mine0926]

What happens if its not editable?

KeyListener works as expected if JCombobox is not editable. But I have to set editable to true because
I should allow user to input and base on their input I should find its match on Jcombobox list

Thanks alacn. I was able to solve tha problem in KeyListener.

Here is what I have done. Thanks.

    import javax.swing.*;
    import java.awt.event.*;
    import java.awt.*;

    public class JComboTrial extends JFrame
    {	JComboBox jc1 = null;
            JButton b1 = new JButton("OK");
            JPanel p = new JPanel();

            public JComboTrial()
            {	String[] strList = {"DE 0001", "DF 0504", "DF 0604", "FR 5971", "GE 0587", "GKL 684"};
                    jc1 = new JComboBox(strList);

                            jc1.getEditor().getEditorComponent().addKeyListener(new KeyListener()
                            {	public void keyTyped(KeyEvent ek)
                            {cmbSelectInput(ek, jc1);	}

                            public void keyPressed(KeyEvent ek)
                            {
                            }

                            public void keyReleased(KeyEvent ek)
                            {}
                            });

                            jc1.getEditor().getEditorComponent().addFocusListener(new FocusListener()
                    {   	public void focusGained(FocusEvent ef)
                                    {	jc1.setPopupVisible(true);
                                    }
                                    public void focusLost(FocusEvent ef){}
                            });

                    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
                    this.setLayout(new BorderLayout());
                    this.add(p, BorderLayout.CENTER);
                    p.setLayout(new BorderLayout());
                    p.add(jc1, BorderLayout.CENTER);
                    p.add(b1, BorderLayout.LINE_END);
                    pack();

                    jc1.setEditable(true);

            }


            void cmbSelectInput(KeyEvent ek, JComboBox combo)
            {	int cmb_count = combo.getItemCount() - 1;
                            Color color = new Color(51,153,255);


                    String combo_item = null;
                            JTextField tf = null;

                            tf = (JTextField)combo.getEditor().getEditorComponent();

                    String text = tf.getText();
                    if (text!=null && (ek.getKeyChar() ==KeyEvent.VK_BACK_SPACE || 
                        ek.getKeyCode() ==KeyEvent.VK_DELETE) && text.length()>0)
                    {
                            text = text.substring(0, text.length() -1);
                            tf.setText(tf.getText());
                                    tf.setSelectionColor(color);
                                    tf.setSelectedTextColor(Color.WHITE);
                                    tf.setSelectionStart(text.length());
                                    tf.setSelectionEnd(tf.getText().length());
                    }
                    else
                    {	if(! "".equals(text) && text != null && text.length() > 0)
                            { 	for(int i=0; i < cmb_count; i++)
                                            {        	combo_item = combo.getItemAt(i).toString();

                                                    if(combo_item.toLowerCase().startsWith(text.toLowerCase()))
                                                    {	System.out.println("inputlen: " + text.length() + " - " + combo_item + ": " + combo_item.length());
                                                    combo.setSelectedIndex(i);
                                                    tf.setText(combo_item);
                                                            tf.setSelectionColor(color);
                                                            tf.setSelectedTextColor(Color.WHITE);
                                                            tf.setSelectionStart(text.length());
                                                            tf.setSelectionEnd(tf.getText().length());

                                                            break;
                                                    }
                                            }
                            }
                    }
            }//end of cmbSelectInput

            public static void main(String[] args)
            {	new JComboTrial().setVisible(true);
            }

    }

Thanks again,
geje