![]() |
The Java Developers Almanac 1.4Order this book from Amazon. |
e812. Forcing a Popup Menu to Be a Heavyweight ComponentBy default, Swing popup menus used byJMenu and JPopupMenu are
lightweight. If heavyweight components are used in the same
frame, the popup menus may appear behind the heavyweight components.
This example demonstrates how to force a JPopupMenu to use heavyweight components: JPopupMenu popupMenu = new JPopupMenu(); // Retrieve current setting boolean lwPopup = popupMenu.isLightWeightPopupEnabled(); // true // Force the popup menu to use heavyweight components popupMenu.setLightWeightPopupEnabled(false); // To use the popup menu, see e810 Creating a Popup MenuThis example demonstrates how to force the popup menu of a JMenu to be
heavyweight:
// Create a menu with a menu item JMenu menu = new JMenu("Menu Label"); menu.add(new JMenuItem("Item Label")); // Retrieve current setting lwPopup = menu.getPopupMenu().isLightWeightPopupEnabled(); // true // Force the menu's popup menu to be heavyweight menu.getPopupMenu().setLightWeightPopupEnabled(false); // To use the menu, see e808 Creating a JMenuBar, JMenu, and JMenuItem ComponentThis example configures all popup menus to be heavyweight: // Retrieve current setting lwPopup = JPopupMenu.getDefaultLightWeightPopupEnabled(); // true // Globally use heavyweight components for all popup menus JPopupMenu.setDefaultLightWeightPopupEnabled(false);
e809. Separating Menu Items in a Menu e810. Creating a Popup Menu e811. Creating a Popup Menu with Nested Menus e813. Getting the Currently Selected Menu or Menu Item e814. Creating a Menu Item That Listens for Changes to Its Selection Status e815. Listening for Changes to the Currently Selected Menu or Menu Item © 2002 Addison-Wesley. |