java - JMenuItem 没有被键盘回车键激活

Question

我自动生成一组 JMenuItem 并将它们添加到每个右键单击事件的 JPopUpMenu 中。问题是当我在所选菜单上按回车键时，我为菜单项设置的操作没有运行。我可以使用向上/向下键在菜单上导航，但是，该操作只能通过鼠标单击来运行。

下面是创建菜单项的代码:

private JMenuItem createMenuItem(TaskFactory tf, String title, boolean useCheckBoxMenuItem, String toolTipText) {

    enter code hereJMenuItem item;
    PopupAction action = new PopupAction(tf, title);
    if ( useCheckBoxMenuItem )
        item = new JCheckBoxMenuItem(action);
    else
        item = new JMenuItem(action);
    item.setEnabled(tf.isReady());
    item.setToolTipText(toolTipText);
    return item;
}

private class PopupAction extends AbstractAction {

    TaskFactory tf;
    PopupAction(TaskFactory tf, String title) {
        super( title );
        this.tf = tf;
    }
    public void actionPerformed(ActionEvent ae) {
        m_view.manager.execute(tf.createTaskIterator());
    }
}

我试过将 focusable 设置为 true，但没有用。我已经在 Mac 10.7 Java 版本 1.6.0_33 和 Ubuntu Java 版本 1.6.0_26 上尝试过。我使用了标准的 Swing 外观和感觉。在 Mac 上运行时:外观是 [Aqua Look and Feel for Mac OS X - com.apple.laf.AquaLookAndFeel]

Answer 1

Windows XP，JDK6_025，使用 Substance、Metal、Windows、Nimbus

编辑1

关于 enter按下键或鼠标被触发 isEnabled

编辑2

添加了MenuKeyListener,

注意!!!!

不要使用 MenuKeyListener 作为 tab 捕捉另一个 KeyEvents (空格)和 enter是，否则有时会生成虚假结果，例如Unknown keyCode: 0x0 on ......。

import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.MenuKeyEvent;
import javax.swing.event.MenuKeyListener;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import javax.swing.table.*;
import org.pushingpixels.substance.api.SubstanceLookAndFeel;
import org.pushingpixels.substance.api.skin.BusinessBlueSteelSkin;

public class TableCheckBox extends JFrame {

    private static final long serialVersionUID = 1L;
    private JTable table;

    public TableCheckBox() {
        Object[] columnNames = {"Type", "Company", "Shares", "Price", "Boolean"};
        Object[][] data = {
            {"Buy", "IBM", new Integer(1000), new Double(80.50), false},
            {"Sell", "MicroSoft", new Integer(2000), new Double(6.25), true},
            {"Sell", "Apple", new Integer(3000), new Double(7.35), true},
            {"Buy", "Nortel", new Integer(4000), new Double(20.00), false}
        };
        DefaultTableModel model = new DefaultTableModel(data, columnNames);
        table = new JTable(model) {

            private static final long serialVersionUID = 1L;

            @Override
            public Class getColumnClass(int column) {
                return getValueAt(0, column).getClass();
            }
        };
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane);
        createPopupMenu();
    }

    private void createPopupMenu() {
        MyMenuKeyListener myMenuKeyListener = new MyMenuKeyListener();
        JPopupMenu popup = new JPopupMenu();
        JMenuItem myMenuItem1 = new JMenuItem("cccccccccccccccccccccc");
        myMenuItem1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //System.out.println("Done myMenuItem1");
            }
        });
        myMenuItem1.getModel().addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                ButtonModel model = (ButtonModel) e.getSource();
                if (model.isArmed()) {
                    //System.out.println("isArmed");
                } else if (model.isEnabled()) {
                    //System.out.println("isEnabled");
                } else if (model.isPressed()) {
                    //System.out.println("isPressed");
                } else if (model.isRollover()) {
                    //System.out.println("isRollover");
                } else if (model.isSelected()) {
                    //System.out.println("isSelected");
                }
            }
        });
        myMenuItem1.addMenuKeyListener(myMenuKeyListener);

        JMenuItem myMenuItem2 = new JMenuItem("bbbbbbbbbbbbbbbbbbbbbb");
        myMenuItem2.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                //System.out.println("Done myMenuItem2");
            }
        });
        myMenuItem2.getModel().addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                ButtonModel model = (ButtonModel) e.getSource();
                if (model.isArmed()) {
                    //System.out.println("isArmed");
                } else if (model.isEnabled()) {
                    //System.out.println("isEnabled");
                } else if (model.isPressed()) {
                    //System.out.println("isPressed");
                } else if (model.isRollover()) {
                    //System.out.println("isRollover");
                } else if (model.isSelected()) {
                    //System.out.println("isSelected");
                }
            }
        });
        myMenuItem2.addMenuKeyListener(myMenuKeyListener);

        popup.add(myMenuItem1);
        popup.add(myMenuItem2);
        MouseListener popupListener = new PopupListener(popup);
        table.addMouseListener(popupListener);
        popup.setLightWeightPopupEnabled(false);
        PopupMenuListener popupMenuListener = new MyPopupMenuListener();
        popup.addPopupMenuListener(popupMenuListener);
    }

    private class PopupListener extends MouseAdapter {

        private JPopupMenu popup;

        PopupListener(JPopupMenu popupMenu) {
            popup = popupMenu;
        }

        @Override
        public void mousePressed(MouseEvent e) {
            maybeShowPopup(e);
        }

        @Override
        public void mouseReleased(MouseEvent e) {
            if (table.getSelectedRow() != -1) {
                maybeShowPopup(e);
            }
        }

        private void maybeShowPopup(MouseEvent e) {
            if (e.isPopupTrigger()) {
                popup.show(e.getComponent(), e.getX(), e.getY());
            }
        }
    }

    private class MyMenuKeyListener implements MenuKeyListener {

        public void menuKeyTyped(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }

        public void menuKeyPressed(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }

        public void menuKeyReleased(MenuKeyEvent e) {
            MenuElement[] path = e.getPath();
            JMenuItem item = (JMenuItem) path[path.length - 1];
            System.out.println("Key typed: " + e.getKeyChar()
                    + ", " + MenuKeyEvent.getKeyText(e.getKeyCode())
                    + " on " + item.getText());
        }
    }

    private class MyPopupMenuListener implements PopupMenuListener {

        public void popupMenuCanceled(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Canceled");
        }

        public void popupMenuWillBecomeInvisible(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Becoming Invisible");
        }

        public void popupMenuWillBecomeVisible(PopupMenuEvent popupMenuEvent) {
            //System.out.println("Becoming Visible");
        }
    }

    public static void main(String[] args) {
        /*SwingUtilities.invokeLater(new Runnable() {

        public void run() {
        SubstanceLookAndFeel.setSkin(new BusinessBlueSteelSkin());
        }
        });*/
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
            /*UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());*/
        } catch (ClassNotFoundException ex) {
        } catch (InstantiationException ex) {
        } catch (IllegalAccessException ex) {
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        }
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                TableCheckBox frame = new TableCheckBox();
                frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
                frame.pack();
                frame.setLocation(150, 150);
                frame.setVisible(true);
            }
        });
    }
}