Question

我有一个放在JPanel中的JButton。现在我已经通过AbstractAction为这个按钮添加了一个关键的监听器。但我想要的是：说我已经分配了键盘键＆＃39; A＆＃39;到这个按钮。现在当我按下键A＆＃39; A＆＃39;我想表明在GUI上按下按钮。我尝试使用Jbutton.setEnabled（）。但是这不起作用，因为我必须启用＆amp;取消按钮。我想AbstractAction中的动作最后会被执行而不是在中间。我在下面发布了我的代码：

private Action buttonPressed(final JButton jButton,final Boolean black) {
    // TODO Auto-generated method stub      

    AbstractAction buttonPressed = new AbstractAction() {
        @Override
        public void actionPerformed(ActionEvent e) {
            int index=keys_names.indexOf(e.getActionCommand().toUpperCase());
            if(index>=0)
            {

                jButton.setEnabled(false);
                // DO some other action

                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                jButton.setEnabled(true);



            }

        }
    };
    return buttonPressed;
}

和使用的JButton是：

JButton b1=new JButton();
b1.getInputMap(javax.swing.JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_A,0), keys_names.get(key_press));
b1.getActionMap().put(keys_names.get(key_press),buttonPressed(b1,false));

Answer 1

你可以简单地调用JButton#doClick，它可以模仿按下按钮，直观地调用按钮ActionListener。但是你想要真正强调这一事实，你可以使用JButton#doClick(int)，这将允许你传递按钮应该“按下”的时间

例如......

import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TestButton {

    public static void main(String[] args) {
        new TestButton();
    }

    public TestButton() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JButton b1 = new JButton("Click Me");
                b1.getInputMap(javax.swing.JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_A, 0), "bang");
                b1.getActionMap().put("bang", new ClickMeAction());

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new GridBagLayout());
                frame.add(b1);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class ClickMeAction extends AbstractAction {

        public ClickMeAction() {
            putValue(NAME, "Click me");
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            JButton btn = (JButton) e.getSource();
            btn.doClick(1000);
        }

    }

}

如何在Java中为JButton添加多个ActionMap

1 个答案: