Question

I’ve got a JPanel class called Board with a static subclass, MouseHanlder, which tracks the mouse position along the appropriate listener in Board. My Board class has fields pointerX and pointerY.

How do i pass the e.getX() and e.getY() from the MouseHandler subclass to its super class JPanel? I tried with getters, setters, super, and cant get the data transfer between subclass and parent class. I’m certain it’s a concept issue, but im stuck.

Thanks!

Due popular demand, some code. This is the code without any atempt of passing :

public class Board extends JPanel {


int x; // Mouse pointer fields.
int y;

public Board() {

            blah blah

    MouseHandler handler = new MouseHandler();
    addMouseMotionListener(handler);

}


static class MouseHandler implements MouseMotionListener {
    int pointerX;
    int pointerY;

    public void mouseMoved(MouseEvent e) {

             i'd like to do something like:
                 super.x = e.getX();
                 super.x = e.getY();

                 or

                 Board.setX() = e.getX(); // Missing setters below, this is just an example.
                 Board.setX() = e.getY();




    }

}

}

Answer 1

Simple. Do an e.getSource() which will give you the source on which the event occurred. In your case it will be your Board class. Simply cast the instance to a Board instance and you are set.

public class Board extends JPanel {


int x; // Mouse pointer fields.
int y;

public Board() {

            blah blah

    MouseHandler handler = new MouseHandler();
    addMouseMotionListener(handler);

}


static class MouseHandler implements MouseMotionListener {
    int pointerX;
    int pointerY;

    public void mouseMoved(MouseEvent e) {
       Board b = (Board) e.getSource();
       b.setX(e.getX()); 
       b.setY(e.getY());
    }

}
}