+ /**
+ * Disable one menu item.
+ *
+ * @param id the menu item ID
+ */
+ public final void disableMenuItem(final int id) {
+ for (TMenuItem item: menuItems) {
+ if (item.getId() == id) {
+ item.setEnabled(false);
+ }
+ }
+ }
+
+ /**
+ * Disable the range of menu items with ID's between lower and upper,
+ * inclusive.
+ *
+ * @param lower the lowest menu item ID
+ * @param upper the highest menu item ID
+ */
+ public final void disableMenuItems(final int lower, final int upper) {
+ for (TMenuItem item: menuItems) {
+ if ((item.getId() >= lower) && (item.getId() <= upper)) {
+ item.setEnabled(false);
+ }
+ }
+ }
+
+ /**
+ * Enable one menu item.
+ *
+ * @param id the menu item ID
+ */
+ public final void enableMenuItem(final int id) {
+ for (TMenuItem item: menuItems) {
+ if (item.getId() == id) {
+ item.setEnabled(true);
+ }
+ }
+ }
+
+ /**
+ * Enable the range of menu items with ID's between lower and upper,
+ * inclusive.
+ *
+ * @param lower the lowest menu item ID
+ * @param upper the highest menu item ID
+ */
+ public final void enableMenuItems(final int lower, final int upper) {
+ for (TMenuItem item: menuItems) {
+ if ((item.getId() >= lower) && (item.getId() <= upper)) {
+ item.setEnabled(true);
+ }