public  void mouseClicked(MouseEvent ev) 
{
            Window w = (Window)ev.getSource();
            Frame f = null;
            if (w instanceof Frame) {
                f = (Frame)w;
            } else {
                return;
            }
            Point convertedPoint = SwingUtilities.convertPoint(
                           w, ev.getPoint(), getTitlePane());
            int state = f.getExtendedState();
            if (getTitlePane() != null &&
                    getTitlePane().contains(convertedPoint)) {
                if ((ev.getClickCount() % 2) == 0 &&
                        ((ev.getModifiers() & InputEvent.BUTTON1_MASK) != 0)) {
                    if (f.isResizable()) {
                        if ((state & Frame.MAXIMIZED_BOTH) != 0) {
                            f.setExtendedState(state & ~Frame.MAXIMIZED_BOTH);
                        }
                        else {
                            f.setExtendedState(state | Frame.MAXIMIZED_BOTH);
                        }
                        return;
                    }
                }
            }
}

 public  void mouseDragged(MouseEvent ev) 
{
            Window w = (Window)ev.getSource();
            Point pt = ev.getPoint();
            if (isMovingWindow) {
                Point eventLocationOnScreen = ev.getLocationOnScreen();
                w.setLocation(eventLocationOnScreen.x - dragOffsetX,
                              eventLocationOnScreen.y - dragOffsetY);
            }
            else if (dragCursor != 0) {
                Rectangle r = w.getBounds();
                Rectangle startBounds = new Rectangle(r);
                Dimension min = w.getMinimumSize();
                switch (dragCursor) {
                case Cursor.E_RESIZE_CURSOR:
                    adjust(r, min, 0, 0, pt.x + (dragWidth - dragOffsetX) -
                           r.width, 0);
                    break;
                case Cursor.S_RESIZE_CURSOR:
                    adjust(r, min, 0, 0, 0, pt.y + (dragHeight - dragOffsetY) -
                           r.height);
                    break;
                case Cursor.N_RESIZE_CURSOR:
                    adjust(r, min, 0, pt.y -dragOffsetY, 0,
                           -(pt.y - dragOffsetY));
                    break;
                case Cursor.W_RESIZE_CURSOR:
                    adjust(r, min, pt.x - dragOffsetX, 0,
                           -(pt.x - dragOffsetX), 0);
                    break;
                case Cursor.NE_RESIZE_CURSOR:
                    adjust(r, min, 0, pt.y - dragOffsetY,
                           pt.x + (dragWidth - dragOffsetX) - r.width,
                           -(pt.y - dragOffsetY));
                    break;
                case Cursor.SE_RESIZE_CURSOR:
                    adjust(r, min, 0, 0,
                           pt.x + (dragWidth - dragOffsetX) - r.width,
                           pt.y + (dragHeight - dragOffsetY) -
                           r.height);
                    break;
                case Cursor.NW_RESIZE_CURSOR:
                    adjust(r, min, pt.x - dragOffsetX,
                           pt.y - dragOffsetY,
                           -(pt.x - dragOffsetX),
                           -(pt.y - dragOffsetY));
                    break;
                case Cursor.SW_RESIZE_CURSOR:
                    adjust(r, min, pt.x - dragOffsetX, 0,
                           -(pt.x - dragOffsetX),
                           pt.y + (dragHeight - dragOffsetY) - r.height);
                    break;
                default:
                    break;
                }
                if (!r.equals(startBounds)) {
                    w.setBounds(r);
                    // Defer repaint/validate on mouseReleased unless dynamic
                    // layout is active.
                    if (Toolkit.getDefaultToolkit().isDynamicLayoutActive()) {
                        w.validate();
                        getRootPane().repaint();
                    }
                }
            }
}

 public  void mouseEntered(MouseEvent ev) 
{
            Window w = (Window)ev.getSource();
            lastCursor = w.getCursor();
            mouseMoved(ev);
}

 public  void mouseExited(MouseEvent ev) 
{
            Window w = (Window)ev.getSource();
            w.setCursor(lastCursor);
}

 public  void mouseMoved(MouseEvent ev) 
{
            JRootPane root = getRootPane();
            if (root.getWindowDecorationStyle() == JRootPane.NONE) {
                return;
            }
            Window w = (Window)ev.getSource();
            Frame f = null;
            Dialog d = null;
            if (w instanceof Frame) {
                f = (Frame)w;
            } else if (w instanceof Dialog) {
                d = (Dialog)w;
            }
            // Update the cursor
            int cursor = getCursor(calculateCorner(w, ev.getX(), ev.getY()));
            if (cursor != 0 && ((f != null && (f.isResizable() &&
                    (f.getExtendedState() & Frame.MAXIMIZED_BOTH) == 0))
                    || (d != null && d.isResizable()))) {
                w.setCursor(Cursor.getPredefinedCursor(cursor));
            }
            else {
                w.setCursor(lastCursor);
            }
}

 public  void mousePressed(MouseEvent ev) 
{
            
            JRootPane rootPane = getRootPane();
            if (rootPane.getWindowDecorationStyle() == JRootPane.NONE) {
                return;
            }
            Point dragWindowOffset = ev.getPoint();
            Window w = (Window)ev.getSource();
            if (w != null) {
                w.toFront();
            }
            Point convertedDragWindowOffset = SwingUtilities.convertPoint(
                           w, dragWindowOffset, getTitlePane());
            Frame f = null;
            Dialog d = null;
            if (w instanceof Frame) {
                f = (Frame)w;
            } else if (w instanceof Dialog) {
                d = (Dialog)w;
            }
            int frameState = (f != null) ? f.getExtendedState() : 0;
            if (getTitlePane() != null &&
                        getTitlePane().contains(convertedDragWindowOffset)) {
                if ((f != null && ((frameState & Frame.MAXIMIZED_BOTH) == 0)
                        || (d != null))
                        && dragWindowOffset.y  >= BORDER_DRAG_THICKNESS
                        && dragWindowOffset.x  >= BORDER_DRAG_THICKNESS
                        && dragWindowOffset.x <  w.getWidth()
                            - BORDER_DRAG_THICKNESS) {
                    isMovingWindow = true;
                    dragOffsetX = dragWindowOffset.x;
                    dragOffsetY = dragWindowOffset.y;
                }
            }
            else if (f != null && f.isResizable()
                    && ((frameState & Frame.MAXIMIZED_BOTH) == 0)
                    || (d != null && d.isResizable())) {
                dragOffsetX = dragWindowOffset.x;
                dragOffsetY = dragWindowOffset.y;
                dragWidth = w.getWidth();
                dragHeight = w.getHeight();
                dragCursor = getCursor(calculateCorner(
                             w, dragWindowOffset.x, dragWindowOffset.y));
            }
}

 public  void mouseReleased(MouseEvent ev) 
{
            if (dragCursor != 0 && window != null && !window.isValid()) {
                // Some Window systems validate as you resize, others won't,
                // thus the check for validity before repainting.
                window.validate();
                getRootPane().repaint();
            }
            isMovingWindow = false;
            dragCursor = 0;
}