Java JButton 与 ActionListener / MouseListener

JButton with both ActionListener / MouseListener

提问by user3249265

Is it possible to create a Jbutton with both an ActionListener and MouseListener

是否可以使用 ActionListener 和 MouseListener 创建 Jbutton

Meaning so i create a button and then when i press it ( throught actionListener) it changes the frame so that AFTER then button was pressed i can press anywhere on the frame and MouseListener would in use.

这意味着我创建了一个按钮，然后当我按下它时（通过 actionListener）它会更改框架，以便在按下按钮之后我可以按下框架上的任何位置，并且 MouseListener 将被使用。

JButton button = new JButton();//Creates Button
button.addActionListener(new ActionListener() {         
public void actionPerformed(ActionEvent e) {
    //Insert MouseListener
    //Then do something with mouseListener
}
}); 

Heres the curent code: however they're now in sync when i try to click the button and i cannot call mouseListener a 2nd time

这是当前代码：但是当我尝试单击按钮时它们现在是同步的，并且我无法第二次调用 mouseListener

    JButton button2 = new JButton("Click");
    button2.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent e)
        {
            System.out.println("You clicked the button");
            newCube.stopCube();
        }

    });
    button2.addMouseListener(new java.awt.event.MouseAdapter()
    {
        public void mousePressed(java.awt.event.MouseEvent evt)
        {
            double x = evt.getX();
            double y = evt.getY();
            newCube.setCube(x,y);
        }
    });

回答by alex2410

Here is example with JToggleButtonwhich add/remove MouseListenerto JFrame.

这是JToggleButton添加/删除MouseListener到的示例JFrame。

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JToggleButton;

public class Example extends JFrame {

    private MouseAdapter mouseListener;

    public Example(){
        init();
        pack();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    private void init() {
        mouseListener = new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                super.mouseClicked(e);
                System.out.println("clicked");
            }
        };
        setLayout(new FlowLayout());
        JToggleButton b = new JToggleButton("add listener");
        b.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if(((JToggleButton)e.getSource()).isSelected()){
                    Example.this.addMouseListener(mouseListener);
                    ((JToggleButton)e.getSource()).setText("remove listener");
                } else {
                    Example.this.removeMouseListener(mouseListener);
                    ((JToggleButton)e.getSource()).setText("add listener");
                }
            }
        });
        add(b);
    }

    public static void main(String... s){
        new Example();
    }
}

EDIT: examle with JButton:

编辑：示例JButton：

public class Example extends JFrame {

    private MouseAdapter mouseListener;

    public Example(){
        init();
        pack();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

    private void init() {
        mouseListener = new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                super.mouseClicked(e);
                System.out.println("clicked");
            }
        };
        setLayout(new FlowLayout());
        JButton b = new JButton("add listener");
        b.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if(((JButton)e.getSource()).getText().equals("add listener")){
                    Example.this.addMouseListener(mouseListener);
                    ((JButton)e.getSource()).setText("remove listener");
                } else {
                    Example.this.removeMouseListener(mouseListener);
                    ((JButton)e.getSource()).setText("add listener");
                }
            }
        });
        add(b);
    }

    public static void main(String... s){
        new Example();
    }
}

回答by user2997477

If you want to move something by clicking on it, you can use a mouse listener on that node directly, instead of using it on the button.

如果你想通过点击来移动某个东西，你可以直接在那个节点上使用鼠标监听器，而不是在按钮上使用它。

To add both the action listener and a mouse listener on a button, you can use the addActionListener and addMouseListener methods on the button.

要在按钮上同时添加动作侦听器和鼠标侦听器，可以在按钮上使用 addActionListener 和 addMouseListener 方法。

Look at the api for information about these methods... http://docs.oracle.com/javase/7/docs/api/javax/swing/JButton.html

查看 api 以获取有关这些方法的信息... http://docs.oracle.com/javase/7/docs/api/javax/swing/JButton.html

回答by rzysia

If I understood you correctly, this sample might help you (add this to your own ActionListener)

如果我理解正确，这个示例可能会对您有所帮助（将其添加到您自己的 ActionListener 中）

@Override
public void actionPerformed(ActionEvent e) {
    ((JButton)e.getSource()).addMouseListener(yourMouseListener);
}

I tried this, it works.

我试过这个，它有效。

回答by user2997477

What you want to do is still not clear to me. Though this can help you. It will add a mouse listner to the component when the start button is clicked and remove the mouse listner when stop button is clicked. Thus you can stop the two listeners from working in sync..

你想做什么我还是不清楚。虽然这可以帮助你。单击开始按钮时，它将向组件添加鼠标侦听器，并在单击停止按钮时删除鼠标侦听器。因此，您可以阻止两个侦听器同步工作..

JButton startButton = new JButton();

startButton.addActionListener(new ActionListener() {         
public void actionPerformed(ActionEvent e) {

   //Add MouseListener to move the component

}
}); 

JButton stopButton = new JButton();

stopButton.addActionListener(new ActionListener() {         
public void actionPerformed(ActionEvent e) {

   //Remove the MouseListener

}
});