WindowListeners

package uf.controll;

import java.awt.Component;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.JDialog;
import javax.swing.JFrame;

public class WindowListeners {

    private JFrame f;
    private JDialog d;
    private Point point;

    public WindowListeners() {}

    public WindowListeners(JFrame f){
        this.f = f;
        setListeners();
    }

    public WindowListeners(JDialog d){
        this.d = d;
        setListeners();
    }

    private void setListeners(){
        Component c = f == null ? d : f;

        this.point = new Point();
        c.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                super.mousePressed(e);
                point.x = e.getX();
                point.y = e.getY();
            }
        });
        c.addMouseMotionListener(new MouseMotionAdapter() {
            @Override
            public void mouseDragged(MouseEvent e) {
                super.mouseDragged(e);
                Point p = c.getLocation();
                c.setLocation(
                        p.x + e.getX() - point.x,
                        p.y + e.getY() - point.y
                );
            }
        });
    }
}