Name: rm29839 Date: 11/12/97


This is a swing bug as you can probally tell.
My goal is to write a combo box that the user
types into, the typed letters are compared to
the combobox items and if a match is found, the
combo popup needs to be up and displaying the
match found.

The problem is that calling JComboBox.showPopup()
when the list is already popped up causes the list
the be popped DOWN.

This is what I'm doing:

//insert some necessary imports here

public class Combo extends JPanel
{
    JComboBox combo;

    ...

    public Combo()
    {
     combo = new JComboBox();

        ... //add in some items to combo

        combo.setEditable(true);

        combo.setEditor(new SearchComboEditor(combo));

        add(combo, BorderLayout.NORTH);

        ....
    }

    public static void main(String[] args)
    {
frame = new JFrame("CustomTable");

        Combo ct = new Combo();
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add("Center", ct);
        frame.show();
        ct.requestDefaultFocus();
    }

    // editor for combo list searching
    //Should also add in code to reset selection if edit is unsucessful.
    class SearchComboEditor implements ComboBoxEditor
    {
        JTextField field = new JTextField();
        JComboBox combo;

        SearchComboEditor(JComboBox combo)
        {
            this.combo = combo;
            field.addKeyListener(new TypeListener());
        }

        public Component getEditorComponent()
        {
            return field;
        }

        public void setItem(Object anObject)
        {
            field.setText(anObject.toString());
        }

        public Object getItem()
        {
            return field.getText();
        }

        public void selectAll()
        {
            field.selectAll();
        }

        public void addActionListener(ActionListener l)
        {
            field.addActionListener(l);
        }

        public void removeActionListener(ActionListener l)
        {
            field.removeActionListener(l);
        }

        class TypeListener extends KeyAdapter
        {
            public void keyTyped(KeyEvent e)
            {
                    combo.showPopup();
                    field.requestFocus();
            }
        };
    };

};
(Review ID: 19472)
======================================================================