Question

（注意：我知道this question，用户必须在其中输入终端命令来解决此问题，但我更希望可以将解决方案放入应用程序中的解决方案。）< / p>

为了解释，我在Java应用程序中使用了KeyBindings。但是，如果有人按住a，e，i，o，u，n，s等键，则变音菜单OSX将以某种方式完全禁用键输入。

但是，如果相关，它不会影响鼠标输入。

这里有一些示例代码可以证明问题所在。如果在OSX上按住上述任何一个键约一秒钟或更长时间，则KeyBindings将完全停止工作。（尽管如此，我还是建议按住该键。

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.Timer;
import javax.swing.WindowConstants;

public class Test extends JPanel implements ActionListener {
    private static final long serialVersionUID = 1L;

    private static JFrame frame;

    private static boolean up = false, down = false, left = false, right = false;

    private static int x = 275, y = 275;

    public static void main(String[] args) {
        Test t = new Test();
        t.setBounds(0, 0, 1200, 600);
        t.setVisible(true);

        Timer repaintTimer = new Timer(2, t);

        frame = new JFrame();
        frame.setSize(600, 600);

        setUpKeyActions(t);

        frame.add(t);

        Dimension dim = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setLocation((dim.width - frame.getWidth()) / 2, (dim.height - frame.getHeight()) / 2);
        frame.getContentPane().setLayout(null);
        frame.setAlwaysOnTop(true);
        frame.setResizable(false);

        repaintTimer.start();

        frame.setVisible(true);
        frame.requestFocus();
    }

    private static void setUpKeyActions(Test t) {
        int condition = WHEN_IN_FOCUSED_WINDOW;

        new KeyAction(t, condition, KeyEvent.VK_UP, 0, false) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                up = true;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_UP, 0, true) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                up = false;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_LEFT, 0, false) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                left = true;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_LEFT, 0, true) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                left = false;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_RIGHT, 0, false) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                right = true;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_RIGHT, 0, true) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                right = false;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_DOWN, 0, false) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                down = true;
            }

        };

        new KeyAction(t, condition, KeyEvent.VK_DOWN, 0, true) {
            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                down = false;
            }

        };

    }

    private static abstract class KeyAction extends AbstractAction {
        private static final long serialVersionUID = 1L;

        KeyAction(JComponent component, int condition, int keyCode, int modifiers, boolean onKeyRelease) {
            InputMap inputMap = component.getInputMap(condition);
            ActionMap actionMap = component.getActionMap();
            KeyStroke keyStroke = KeyStroke.getKeyStroke(keyCode, modifiers, onKeyRelease);
            inputMap.put(keyStroke, keyStroke.toString());
            actionMap.put(keyStroke.toString(), this);
        }

    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        if(up)
            y -= 1;
        if(down)
            y += 1;
        if(right)
            x += 1;
        if(left)
            x -= 1;
        if(x < 0)
            x = 0;
        else if(x > frame.getWidth() - 30)
            x = frame.getWidth() - 30;
        if(y < 0)
            y = 0;
        else if(y > frame.getHeight() - 50)
            y = frame.getHeight() - 50;
        g.drawRect(x, y, 30, 30);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        frame.repaint();
    }

}

Answer 1

要回答我遇到的问题，问题是Java版本。

我有JDK 1.8.0_151，但是很明显，这个问题已在JDK 1.8.0_172的某些迭代中得到解决。

因此，为确保我的应用程序用户不会发生此问题，我将需要使用org.apache.commons.lang3.SystemUtils的JDK 1.9或更高版本，并使用{{3 }}。

更新：

我实际上计划使用从问题this answer中获得的方法，因为它使我不必要求JRE 1.9，而是允许我使最小值为1.8.0_172。

停止OSX变音符号为所有用户禁用Java中的键绑定吗？

1 个答案: