自定义侦听器：

Question

基本上我想在用户完全不移动鼠标时移动它来运行方法。我不知道如何解决这个问题。

自定义侦听器：

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

public class CustomMouseListener implements MouseMotionListener, MouseListener{

    //whatever other methods I have (irrelevant for the question)

    public void mouseMoved(MouseEvent e){
        //code goes here
        //but right now it fires every time the mouse is moved, which
        //is way too much, I only need one per move
    }

}

Answer 1

普通算法

0. Fire mouse listener for every second with (x=x1, y=y1)

1. Store (x,y) of mouse pointer;
2. If (x,y) == (x1,y1) for another 15(or whatever you consider as time interval) sec
3.     make account of (x1,y1);
4. Else do nothing;
5. If(x1,y1) changed after 15 sec
6.     call mouseMove();

Answer 2

这样做的一种方法是保存最后一次移动。如果当前时间 - lastMovedTime＆gt; x然后调用你的监听器或mouseStartedMoving（）方法

public class CustomMouseListener实现MouseMotionListener，MouseListener { public final static long TIME_DIFFERNCE_FOR_IDLE = 800; //毫秒 long lastMoveTime = -1;

public void mouseMoved(MouseEvent e){
    long currentTime = System.currentTimeMillis();
    long diff =   lastMoveTime  - currentTime ;
    if(lastMoveTime == -1 || diff > TIME_DIFFERNCE_FOR_IDLE ){
        lastMoveTime();

    }

   lastMoveTime  = System.currentTimeMillis();
 }

}

void  lastMoveTime(){
     //do what u need to when mouse starts mooving
 }

另一个需要添加轮询线程。可以创建一个大小为1的默认线程池。在run方法中调用一个任务（Runnable）1秒钟（或2或800毫秒 - 取决于你定义为移动之间的暂停）

无论如何，在原始代码中跟踪当前鼠标位置x，y并暴露给runnable。

runnable跟踪前一个鼠标位置。 Runnable中还有一个状态变量，它是一个枚举 - {INITIAL，STATIONARY，MOVING}。

最初是INITIAL，如果你获得鼠标移动位置，它的INITIAL就会移动到

如果MOVING和Runnable中的X滴答，它不会移动到STATIONARY。再次在鼠标移动中，它将移至MOVING。

当它从INITIAL移动到MOVING OR STATIONARY到MOVING时，可以有被调用的监听器或者只是一个特殊的方法 - mouseStartedMoving（）

在那里做任何事情。

Answer 3

如果您只想知道两件事情，当鼠标开始移动时以及当鼠标停止移动时，您可以使用javax.swing.Timer在事件之间插入延迟，这样它才会被触发当达到延迟时......

public class CustomMouseListener implements MouseMotionListener, MouseListener{

    private javax.swing.Timer moveTimer;
    private boolean moving = false;

    public CustomMouseListener() {
         moveTimer = new javax.swing.Timer(25, new ActionListener() {
                         public void actionPerformed(ActionEvent evt) {
                             moving = false;
                             // Method to be called when you want to
                             // to know when the mouse has stopped moving...
                         }
                     });
        moveTimer.setRepeats(false);
    }

    //whatever other methods I have (irrelevant for the question)

    public void mouseMoved(MouseEvent e){
        if (moving || moveTimer.isRunning()) {
            moveTimer.restart();
        } else {
            moving = true;
            moveTimer.start();
            // Method to call when you want to know when the mouse
            // has started moving...
        }
    }

}

基本上，如果在没有调用mouseMoved的情况下经过25毫秒，javax.swing.Timer将会被触发....你可能想稍微使用这个阈值......

Java swing mouse只能发射一次

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3 个答案: