为多个JPanel注册1个mouseDragged事件

Question

我有一个主JPanel，上面还有另外两个JPanel（面板A和面板B），如下图所示：

我想跟踪这些JPanel上的mouseDragged事件，目前我正在为所有3个JPanel跟踪它：

mainPanel.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
    public void mouseDragged(java.awt.event.MouseEvent evt) {

    }
});

panelA.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
    public void mouseDragged(java.awt.event.MouseEvent evt) {

    }
});

panelB.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
    public void mouseDragged(java.awt.event.MouseEvent evt) {

    }
});

有没有办法通过仅注册一个侦听器而不是3来跟踪所有3个JPanel的mouseDragged事件？谢谢

Answer 1

class MyMouseMotionListener implements MouseMotionListener{
    public void mouseDragged(java.awt.event.MouseEvent evt) {

    }
}

...

MouseMotionListener myListener = new MyMouseMotionListener();

mainPanel.addMouseMotionListener(myListener);
panelA.addMouseMotionListener(myListener);
panelB.addMouseMotionListener(myListener);