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));
      }
    }