java swing按住两个鼠标按钮

Question

我想实现一种方法，用户需要同时按住鼠标左键和右键

我正在使用Swing和Java1.7。我尝试过这个，但它没有检测到两个按钮的情况下，我希望它：

public void mousePressed(MouseEvent e) {    
     if (SwingUtilities.isLeftMouseButton(e) && SwingUtilities.isRightMouseButton(e)){
              ///code here
     }
}

我尝试分离方法，并使用布尔值来确定是否按下鼠标按钮，然后设置一个条件以确定是否同时按下这两个按钮，但这也不起作用

Answer 1

似乎不可能直接执行，因为鼠标事件是按顺序触发的。例如，见this SO question/answers

因此，你需要决定“同时对你来说意味着什么”（即时间应该有多近）。然后可以捕获两个单独的事件并比较它们的getWhen()值

Answer 2

这是一个你想做什么就做什么的SSCCE。。。i、 如果我正确理解了你的问题

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

public class StackOverflow15957076 extends MouseAdapter
{
    private JLabel status;

    private boolean isLeftPressed;
    private boolean isRightPressed;

    public StackOverflow15957076 ()
    {
        JFrame frame = new JFrame ();
        frame.setDefaultCloseOperation (JFrame.DISPOSE_ON_CLOSE);

        JPanel panel = new JPanel (new FlowLayout (FlowLayout.CENTER));

        status = new JLabel ("waiting for both mouse buttons...");

        status.addMouseListener (this);

        panel.add (status);

        frame.add (panel);

        frame.pack ();
        frame.setVisible (true);

        isLeftPressed = false;
        isRightPressed = false;
    }

    @Override
    public void mousePressed (MouseEvent e)
    {
        if (SwingUtilities.isLeftMouseButton (e))
        {
            isLeftPressed = true;
        }
        else if (SwingUtilities.isRightMouseButton (e))
        {
            isRightPressed = true;
        }

        if (isLeftPressed && isRightPressed)
        {
            status.setText ("both buttons are pressed");
        }
    }

    @Override
    public void mouseReleased (MouseEvent e)
    {
        if (SwingUtilities.isLeftMouseButton (e))
        {
            isLeftPressed = false;
        }
        else if (SwingUtilities.isRightMouseButton (e))
        {
            isRightPressed = false;
        }

        status.setText ("waiting for both mouse buttons...");
    }

    public static void main (String[] args)
    {
        SwingUtilities.invokeLater (new Runnable ()
        {
            @Override
            public void run ()
            {
                new StackOverflow15957076 ();
            }
        });
    }
}