Question

我的JFrame里面有一个按钮。当用户单击框架上的任何位置时，我想检查按钮是否在其之前被按下或单击。

例如，如果用户点击框架而没有先点击按钮，则应该说＆＃34;按钮未按下＆＃34;但是如果用户点击按钮然后按下框架上的任何地方，那么它应该按下＆＃34;按钮＆＃34;。

我的代码：

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Test1 
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame();

        final int FRAME_WIDTH  = 400;
        final int FRAME_HEIGHT = 400;

        frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
        frame.setTitle("Test 1");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout());

        JPanel panel = new JPanel();
        frame.add(panel,BorderLayout.NORTH);

        final JButton btnRectangle = new JButton("Rectangle");
        panel.add(btnRectangle);

        class MousePressListener implements MouseListener
        {
            public void mousePressed(MouseEvent event)
            {
                int x = event.getX() ; 
                int y = event.getY() ;

                System.out.println("you have press the mouse at X : " + x + " and Y : " + y);

                if(btnRectangle.getModel().isSelected())
                    System.out.println("the button is pressed");
                else 
                    System.out.println("the button is NOT pressed");
            }

            public void mouseReleased(MouseEvent event){}
            public void mouseClicked(MouseEvent event){}
            public void mouseEntered(MouseEvent event){}
            public void mouseExited(MouseEvent event){}
        }

        MousePressListener mListener = new MousePressListener();
        frame.addMouseListener(mListener);

        frame.setVisible(true);
    }

}

正如您所看到的，我试图检查JFrame MousePressed Listener中是否单击了该按钮。但没有成功。我也看看这个问题：

How can I check that JButton is pressed? If the isEnable() is not work?

但似乎无处可去，请帮忙

Answer 1

已完成以下步骤，

public class Test2 
{
    static boolean isPressed = false;

     public static void main(String[] args)
     {
        .....
             btnRectangle.addActionListener(new ActionListener() {

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


        class MousePressListener implements MouseListener
        {
            public void mousePressed(MouseEvent event)
            {
                if(!isPressed){
                     System.out.println("the button is NOT pressed");

                }else{
                    System.out.println("the button is pressed");
                }
               .....
             }
          }


     }

}

见输出，

Java：检查是否在Frame MousePressListener中按下了JButton

1 个答案: