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Submenu.java
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214 lines (189 loc) · 5.58 KB
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package org.lcdproc.lcdjava;
import java.util.HashMap;
import java.util.Map;
/**
* Submenu.
* <p>Displays the submenus name with tailing submenu marker
* @author StefanKrupop
*/
public class Submenu extends AbstractMenuItem
{
/**
* The LCD that owns this Submenu.
*/
private LCD _lcd;
/**
* A Map of MenuItems added to this Submenu.
*/
private Map<String, MenuItem> _menuItems;
/**
* The count of menu items we have created.
*/
private int _menuItemCounter;
/**
* Constructor.
* @param lcd the LCD server object.
* @param id the of the submenu.
* @param menu the Submenu that knows about this MenuItem.
*/
protected Submenu(LCD lcd, String id, Submenu menu)
{
super(id, menu);
_lcd = lcd;
_menuItems = new HashMap<String, MenuItem>();
}
public Submenu(LCD lcd) {
this(lcd, "", null);
_menu = this;
}
/**
* Get the menu item type.
* @return the menu item type.
*/
public String getType()
{
return MENUITEM_MENU;
}
/**
* Construct a new Submenu.
* @param menu the Submenu that owns the submenu.
* @param text the menu text.
* @return a new Submenu.
*/
public static Submenu construct(Submenu menu, String text)
{
Submenu menuItem = null;
try
{
menuItem = (Submenu)menu.constructMenuItem(MENUITEM_MENU);
menuItem.setText(text);
}
catch (LCDException e) //NOPMD
{
// Supress, would only get one if we asked for an invalid menu item.
}
return menuItem;
}
/**
* Create a MenuItem for this Submenu.
* @param type the menu item type, see {@link MenuItem} for a list of types.
* @return the created MenuItem.
* @throws LCDException if the menu item type is not recognized.
*/
public MenuItem constructMenuItem(String type)
throws LCDException
{
MenuItem item;
synchronized (this) {
if (type.equals(MENUITEM_MENU))
{
item = new Submenu(_lcd, getID() + "_" + Integer.toString(_menuItemCounter), this);
}
else if (type.equals(MENUITEM_ACTION))
{
item = new ActionMenuItem(getID() + "_" + Integer.toString(_menuItemCounter), this);
}
else if (type.equals(MENUITEM_CHECKBOX))
{
item = new CheckboxMenuItem(getID() + "_" + Integer.toString(_menuItemCounter), this);
}
else if (type.equals(MENUITEM_RING))
{
item = new RingMenuItem(getID() + "_" + Integer.toString(_menuItemCounter), this);
}
else if (type.equals(MENUITEM_SLIDER))
{
item = new SliderMenuItem(getID() + "_" + Integer.toString(_menuItemCounter), this);
}
else if (type.equals(MENUITEM_NUMERIC))
{
item = new NumericMenuItem(getID() + "_" + Integer.toString(_menuItemCounter), this);
}
else if (type.equals(MENUITEM_ALPHA))
{
item = new AlphaMenuItem(getID() + "_" + Integer.toString(_menuItemCounter), this);
}
else if (type.equals(MENUITEM_IP))
{
item = new IpMenuItem(getID() + "_" + Integer.toString(_menuItemCounter), this);
}
else
{
throw new LCDException(
"Unable to create a menu item of type " + type);
}
_menuItemCounter++;
}
return item;
}
/**
* Add a MenuItem to this Submenu.
* @param item the MenuItem to add.
* @return whether or not the menu item was added successfully.
*/
protected boolean addItem(MenuItem item)
{
boolean success = false;
String itemId = item.getID();
synchronized (this) {
if (!_menuItems.containsKey(itemId))
{
_menuItems.put(itemId, item);
_lcd.write(LCD.CMD_MENU_ADD + "\"" + _id + "\"" + " " + itemId +
" " + item.getType() + " \"\"");
success = updateItem(item);
}
}
return success;
}
/**
* Update a MenuItem on this Submenu.
* @param item the MenuItem to update.
* @return whether or not the MenuItem was updated successfully.
*/
protected boolean updateItem(MenuItem item)
{
boolean success = false;
String itemId = item.getID();
synchronized (this) {
if (_menuItems.containsKey(itemId))
{
_lcd.write(LCD.CMD_MENU_SET + "\"" + _id + "\"" + " " + itemId +
" " + item.getData());
success = true;
}
}
return success;
}
/**
* Delete a MenuItem from this Submenu.
* @param item the MenuItem to delete.
*/
protected void removeItem(MenuItem item)
{
String itemId = item.getID();
synchronized (this) {
if (_menuItems.containsKey(itemId))
{
_lcd.write(LCD.CMD_MENU_DEL + "\"" + _id + "\"" + " " + itemId);
_menuItems.remove(itemId);
}
}
}
/**
* Return menu item with the given id
* @param id the id of the menu item
* @return the MenuItem or null when the ID does not exist
*/
public MenuItem getMenuItem(String id) {
return _menuItems.get(id);
}
/**
* Sets this menu as the current main menu
*/
public void setAsMainMenu() {
synchronized (this) {
_lcd.write(LCD.CMD_MENU_SET_MAIN + "\"" + _id + "\"");
}
}
}