java mouse move window listener перетаскиваем форму frame

java-Mouse move window listener перетаскиваем форму frame.java

MouseMoveWindowListener mouseMoveWindowListener = new MouseMoveWindowListener(frame);
label.addMouseMotionListener(mouseMoveWindowListener);
label.addMouseListener(mouseMoveWindowListener);

class MouseMoveWindowListener extends MouseAdapter {

    private Point diffOnScreen;
    private Component component;

    MouseMoveWindowListener(Component component) {
        this.component = component;
    }

    @Override
    public void mousePressed(MouseEvent e) {
        SwingUtilities.invokeLater(() -> {
            Point pressedPointLocationOnScreen = e.getLocationOnScreen();
            int x = pressedPointLocationOnScreen.x - component.getLocationOnScreen().x;
            int y = pressedPointLocationOnScreen.y - component.getLocationOnScreen().y;
            diffOnScreen = new Point(x, y);
        });
    }

    @Override
    public void mouseDragged(MouseEvent e) {
        SwingUtilities.invokeLater(() -> {
            Point nowMouseLocation = e.getLocationOnScreen();
            Point point = new Point(
                    nowMouseLocation.x - diffOnScreen.x,
                    nowMouseLocation.y - diffOnScreen.y
            );
            SwingUtilities.convertPointFromScreen(point, component.getParent());
            component.setLocation(point);
        });
    }
}