Dimension () { if (isPreferredSizeSet()) { return super.getPreferredSize(); } final Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner(); Point p = null; if (focusOwner != null && focusOwner.isShowing()) { p = focusOwner.getLocationOnScreen(); } return computeNotBiggerDimension(super.getPreferredSize().getSize(), p); }