Question

我想使用我的jframe或jdialog中的快捷键访问组件（EX：这里我使用Ctrl + N来访问jframe的NEW按钮），所以我能够使用键事件调度程序执行我的任务但是事情当按下短按键时，相关的按键事件会递归地触发，我怎么能停止呢？我如何管理一次？这是我的代码。

public void FocuseComponent(JComponent component) {

    KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(new KeyEventDispatcher() {
        @Override
        public boolean dispatchKeyEvent(KeyEvent e) {

            switch (e.getID()) {
                case KeyEvent.KEY_PRESSED:
                    if (e.getKeyCode() == e.VK_N) {
                        component.requestFocusInWindow();
                    }
                    break;

                case KeyEvent.KEY_RELEASED:

                    break;

                case KeyEvent.KEY_TYPED:
                    break;

            }

            return false;

        }

    });

}

}

Answer 1

以下是如何为窗口注册键绑定全局的示例：

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;

public class TestKeyHandling {

    private static final String CTRL_N_KEY = "nKey";
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                final JFrame frm = new JFrame("Test");
                Action act = new AbstractAction() {

                    @Override
                    public void actionPerformed(ActionEvent e) {
                        JOptionPane.showMessageDialog(frm, "Ctrl + N pressed!");
                    }
                };
                frm.getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("control N"), CTRL_N_KEY);
                frm.getRootPane().getActionMap().put(CTRL_N_KEY, act);
                frm.add(new JTextField(20), BorderLayout.NORTH);
                frm.add(new JTextField(20), BorderLayout.SOUTH);
                frm.pack();
                frm.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
                frm.setLocationRelativeTo(null);
                frm.setVisible(true);
            }
        });
    }
}

如何使用键事件调度程序进行键盘快捷键

1 个答案: