Losing the first character in the cell editor in the JTable panel

Question

I have a cell editor containing a small button and then a text box that can be used to edit the inline value

I use setSurrendersFocusOnKeystroke (true) and a focus listener to allow the user to immediately start editing from the keyboard, but the problem is that the pressed fisrt key seems to be consumed and is being added to the text box, how can I prevent this?

Full standalone example below

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

public class PanelTableEditorTest extends JFrame {

    private JTable table;

    public PanelTableEditorTest() {
        this.setLayout(new BorderLayout());
        table = new JTable(10, 10);
        table.getSelectionModel().setSelectionMode(
            ListSelectionModel.SINGLE_SELECTION);
        table.setCellSelectionEnabled(true);
        table.setDefaultEditor(Object.class, new SimpleMultiRowCellEditor());
        table.setSurrendersFocusOnKeystroke(true);
        table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
            .put(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_F2, 0),
            "none");
        table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
            .put(KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_ENTER, 0),
            "startEditing");
        this.add(table.getTableHeader(), BorderLayout.NORTH);
        this.add(table, BorderLayout.CENTER);
        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            public void run() {
                new PanelTableEditorTest();
            }
        });
    }

    public class SimpleMultiRowCellEditor extends DefaultCellEditor {

        final JPanel panel;
        private final JButton rowCount;

        public SimpleMultiRowCellEditor() {
            super(new JTextField());
            this.setClickCountToStart(1);

            rowCount = new JButton();
            rowCount.setVisible(true);
            panel = new JPanel();
            panel.setOpaque(false);
            panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
            panel.add(rowCount);
            panel.add(editorComponent);
            panel.addFocusListener(new PanelFocusListener());
        }

        public Component getTableCellEditorComponent(
            final JTable table,final Object val, final boolean isSelected,
            final int row, final int column) {
            rowCount.setText("1");
            delegate.setValue(val);
            editorComponent.requestFocusInWindow();
            return panel;
        }

        class PanelFocusListener implements FocusListener {

            public void focusGained(FocusEvent e) {
                editorComponent.requestFocusInWindow();
            }

            public void focusLost(FocusEvent e) {
            }
        }
    }
}

Answer 1

, , http://jroller.com/santhosh/entry/keyboard_handling_in_tablecelleditor, http://forums.java.net/jive/thread.jspa?messageID=482236񵮼

,

JTable java DefaultCellEditor , .

, , , null, .

Ive setSurrenderKeystrokes (true), ,

import javax.swing.*;
import javax.swing.text.Caret;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.util.EventObject;

public class PanelTableEditorTest extends JFrame
{

    private JTable table;

    public PanelTableEditorTest()
    {
        try
        {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        }
        catch(Exception e)
        {

        }
        this.setLayout(new BorderLayout());
        table = new JTable(4, 4);
        table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        table.setCellSelectionEnabled(true);
        table.setSurrendersFocusOnKeystroke(false);
        table.setDefaultEditor(Object.class,new SimpleMultiRowCellEditor());
        table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke(java.awt.event.
                        KeyEvent.VK_F2, 0), "none");
        table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(KeyStroke.getKeyStroke(java.awt.event.
                        KeyEvent.VK_ENTER, 0), "startEditing");

        this.add(table.getTableHeader(), BorderLayout.NORTH);

        this.add(table, BorderLayout.CENTER);
        pack();
        setVisible(true);
    }

    public static void main(String[] args)
    {
        EventQueue.invokeLater(new Runnable()
        {
            public void run()
            {
                new PanelTableEditorTest();

            }
        });
    }

    public class SimpleMultiRowCellEditor extends DefaultCellEditor
    {
        private EventObject event;
        final JPanel panel;
        private final JButton rowCount;

        public SimpleMultiRowCellEditor()
        {
            super(new JTextField());
            this.setClickCountToStart(1);

            rowCount = new JButton();
            rowCount.setVisible(true);
            panel = new TableEditorPanel();
            panel.setRequestFocusEnabled(true);
            panel.setOpaque(false);
            panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
            panel.add(rowCount);
            panel.add(editorComponent);
        }

        public boolean isCellEditable(EventObject anEvent)
        {
            event=anEvent;
            return super.isCellEditable(anEvent);
        }

        public Component getTableCellEditorComponent(final JTable table, final Object val, final boolean isSelected, final int row, final int column)
        {
            rowCount.setText("1");
            delegate.setValue(val);
            if(event instanceof KeyEvent || event==null)
            {
                final Caret caret = ((JTextField)editorComponent).getCaret();
                caret.setDot(0);
                ((JTextField)editorComponent).setText("");                
            }
            return panel;
        }

        class TableEditorPanel extends JPanel
        {

            public void addNotify(){
                super.addNotify();
                editorComponent.requestFocus();
            }

            protected boolean processKeyBinding(KeyStroke ks, KeyEvent e, int condition, boolean pressed){
                InputMap map = editorComponent.getInputMap(condition);
                ActionMap am = editorComponent.getActionMap();

                if(map!=null && am!=null && isEnabled()){
                    Object binding = map.get(ks);
                    Action action = (binding==null) ? null : am.get(binding);
                    if(action!=null){
                        return SwingUtilities.notifyAction(action, ks, e, editorComponent,
                                e.getModifiers());
                    }
                }
                return false;
            }
        }
    }
}

Answer 2

rowCount.setFocusable();

SimpleMultiRowCellEditor, , JText - ,