@Override
 public void create() {
   manager = new ManagerScreen(this);
   Assets.shared().load();
   Setting.load();
   FantasyTowerDefend.getManagerScreen().createScreen(ManagerScreen.SCREEN_MENU);
   Gdx.input.setCatchBackKey(true);
 }
  public void initGroup() {
    // TODO Auto-generated method stub
    setWidth(Constant.MAP_UNIT_SIZE_WIDTH * 2);
    setHeight(Constant.MAP_UNIT_SIZE_HEIGHT);

    switch (id + 1) {
      case 1:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_1_RANGE;
        break;
      case 2:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_2_RANGE;
        break;
      case 3:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_3_RANGE;
        break;
      case 4:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_4_RANGE;
        break;
      case 5:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_5_RANGE;
        break;
      case 6:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_6_RANGE;
        break;
      case 7:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_7_RANGE;
        break;
      case 8:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_8_RANGE;
        break;
      case 9:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_9_RANGE;
        break;
      case 10:
        tower = new Image(Assets.shared().tower1_Animation_Up.keyFrames[0]);
        range = Constant.TOWER_10_RANGE;
        break;
      default:
        break;
    }
    tower.setPosition(Constant.MAP_UNIT_SIZE_WIDTH / 2 - tower.getWidth() / 2, 0);
    addActor(tower);

    ok = new Image(Assets.shared().button_ok);
    ok.setWidth(Constant.MAP_UNIT_SIZE_WIDTH);
    ok.setHeight(Constant.MAP_UNIT_SIZE_HEIGHT);
    ok.setColor(Color.GREEN);
    ok.setPosition(getWidth() / 2, 0);
    addActor(ok);

    ok_press = new Image(Assets.shared().button_ok_click);
    ok_press.setWidth(Constant.MAP_UNIT_SIZE_WIDTH);
    ok_press.setHeight(Constant.MAP_UNIT_SIZE_HEIGHT);
    ok_press.setColor(Color.GREEN);
    ok_press.setPosition(getWidth() / 2, 0);
    ok_press.setVisible(false);
    addActor(ok_press);

    ok.addListener(
        new ClickListener() {
          @Override
          public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
            // TODO Auto-generated method stub
            if (screen.world.getTowerCoin(id + 1) <= screen.world.coin) {
              screen.world.coin -= screen.world.getTowerCoin(id + 1);
              screen.world.addNewTower(id + 1, screen.pos, 4);
              for (int i = 0; i < screen.towerButton.length; i++) {
                if (screen.towerButton[i].getX() == getX()
                    && screen.towerButton[i].getY() == getY()) {
                  screen.towerButton[i].isVisible = false;
                }
              }

              for (int j = 0; j < screen.world.activeTower.size; j++) {
                if ((screen.world.activeTower.get(j).getPosition().x
                            - screen.world.activeTower.get(j).xPlus)
                        == getX()
                    && (screen.world.activeTower.get(j).getPosition().y
                            - screen.world.activeTower.get(j).yPlus)
                        == getY()) {
                  screen.radar = true;
                  screen.towerPos = j;
                  break;
                }
              }
              setVisible(false);
              screen.towerGroup.setVisible(false);
            } else {
              // not enough gold
              screen.dialog.setInfo(Constant.not_money_enough);
              screen.dialog.setVisible(true);
            }

            ok.setVisible(true);
            ok_press.setVisible(false);
            super.touchUp(event, x, y, pointer, button);
          }

          @Override
          public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
            // TODO Auto-generated method stub
            ok.setVisible(false);
            ok_press.setVisible(true);
            return super.touchDown(event, x, y, pointer, button);
          }
        });
  }