Java Code Examples for javax.swing.JMenu#remove()

/**
 * Removes a menu item with the given name from the menu bar and returns the removed item.
 * Returns null if menu item does not exist.
 *
 * @param menuName String
 * @return JMenu
 */
public JMenuItem removeMenuItem(String menuName, String itemName) {
  JMenu menu = getMenu(menuName);
  if(menu==null) {
    return null;
  }
  itemName = itemName.trim();
  JMenuItem item = null;
  for(int i = 0; i<menu.getItemCount(); i++) {
    JMenuItem next = menu.getItem(i);
    if(next.getText().trim().equals(itemName)) {
      item = next;
      menu.remove(i);
      break;
    }
  }
  return item;
}
 

static void addRecent( final UiContext context, final File path ) {
  final JMenu menu = context.recentMenu;
  final int n = menu.getItemCount();
  if (n > 9) {
    menu.remove(n - 1);
  }

  final RecentAction ra = new RecentAction(context, path);
  final JMenuItem jc = menu.add(ra);
  ra.setItem(jc);
  if (n > 0) {
    menu.remove(menu.getItemCount() - 1);
    menu.add(jc, 0);
  }
}
 

private void updateRecent( final UiContext context, final File path ) {
  final JMenu menu = context.recentMenu;
  final JMenuItem ami = getItem();
  if (ami != null) {
    for (int i = 0, n = menu.getItemCount(); i < n; ++i) {
      final JMenuItem mi = menu.getItem(i);
      if (mi == ami) {
        menu.remove(i);
        menu.add(ami, 0);
        break;
      }
    }
  }
}
 

/** Frees all listeners etc from given workspace. */
void detachWorkspace(
    Workspace workspace, Hashtable workspace2Menu, Hashtable menu2Workspace, Hashtable workspace2Listener,
    JMenu menu
) {
    JRadioButtonMenuItem menuItem = (JRadioButtonMenuItem) workspace2Menu.get(workspace);
    workspace2Menu.remove(workspace);
    menu2Workspace.remove(workspace2Listener.get(workspace));
    workspace2Listener.remove(workspace);
    menu.remove(menuItem);
}
 

/**
 * Remove any potential orphan separator at the end of the menu.
 *
 * @param menu the menu to purge
 */
public static void trimSeparator (JMenu menu)
{
    int count = menu.getMenuComponentCount();

    if ((count > 0) && menu.getMenuComponent(count - 1) instanceof JSeparator) {
        menu.remove(count - 1);
    }
}
 

/**
 * Removes duplicated separators from a JMenu
 *
 * @param menu the menu
 */
private static void removeDuplicatedSeparators(JMenu menu) {
	int separatorCount = 0;
	for (Component component : menu.getMenuComponents()) {
		if (component instanceof JPopupMenu.Separator) {
			separatorCount++;
		} else {
			separatorCount = 0;
		}
		if (separatorCount > 1) {
			menu.remove(component);
		}
	}
}
 

/**
 * Add a submenu to a menu.
 * If the submenu contains to much elements, it is split into several submenus.
 * 
 * @param menu Menu.
 * @param submenu Submenu.
 * @param begin Number of items kept at the beginning.
 * @param end Number of items kept at the end.
 */
public void addSubmenu(JPopupMenu menu, JMenu submenu, int begin, int end) {
  Configuration config = Configuration.getConfiguration();
  final int maxElements = Math.max(
      config.getInt(null, ConfigurationValueInteger.MENU_SIZE),
      begin + end + 2);
  if (submenu.getMenuComponentCount() > maxElements) {
    List<JMenu> menuList = new ArrayList<JMenu>();
    while (submenu.getMenuComponentCount() > begin + end + 1) {
      int count = Math.min(maxElements, submenu.getMenuComponentCount() - begin - end);
      JMenu newMenu = new JMenu(submenu.getItem(begin).getText() + "...");
      for (int i = 0; i < count; i++) {
        JMenuItem item = submenu.getItem(begin);
        submenu.remove(begin);
        if (item != null) {
          newMenu.add(item);
        } else {
          addSeparator(newMenu);
        }
      }
      menuList.add(newMenu);
    }
    for (int i = 0; i < menuList.size(); i++) {
      submenu.add(menuList.get(i), begin + i);
    }
    addSubmenu(menu, submenu, begin, end);
  } else {
    menu.add(submenu);
  }
}
 

@Override
public void finishMenu(String path) {
    path = mapping(path);
    if (path.equals("_") || path.startsWith("_/")) {
        return;
    }
    if (!menuElements.containsKey(path)) {
        throw new IllegalArgumentException("Invalid menu: " + path);
    }
    if (path.startsWith("/file/recent")) {
        return;
    }
    MenuElement me = menuElements.get(path);
    if (me instanceof JMenu) {
        JMenu jm = (JMenu) me;
        if (jm.getMenuComponentCount() == 1) {
            String parentPath = path.contains("/") ? path.substring(0, path.lastIndexOf('/')) : "";
            MenuElement parMe = menuElements.get(parentPath);
            JMenuItem mi = (JMenuItem) jm.getMenuComponent(0);
            jm.remove(mi);
            if (parMe instanceof JMenu) {
                JMenu parMenu = (JMenu) parMe;
                parMenu.remove(jm);
                parMenu.add(mi);
            } else if (parMe instanceof JMenuBar) {
                JMenuBar parMenuBar = (JMenuBar) parMe;
                parMenuBar.remove(jm);
                parMenuBar.add(mi);
            }
        }
    }
}
 

/**
 * Remove any potential orphan separator at the end of the menu.
 *
 * @param menu the menu to purge
 */
public static void trimSeparator (JMenu menu)
{
    int count = menu.getMenuComponentCount();

    if ((count > 0)
        && menu.getMenuComponent(count - 1) instanceof JSeparator) {
        menu.remove(count - 1);
    }
}