code: public void setBoardPivotX(float x) {
          if (mListeners != null) {
              for (StateListener l : mListeners) {
                  l.onBoardPivotX(this, x);
              }
          }
          mContentView.setPivotX(x);
      }
docs: Set the x location of pivot point around which this board is rotated.
  
  @param x