add listener . concode_field_sep List<StateListener> listeners concode_elem_sep Rotation DEFAULT_ROTATION concode_elem_sep Rotation rotation concode_elem_sep double DEFAULT_POWER concode_elem_sep double DEFAULT_DIRECTION concode_elem_sep String DEFAULT_TEXT concode_elem_sep String text concode_elem_sep double power concode_elem_sep double direction concode_field_sep double getPower concode_elem_sep double getDirection concode_elem_sep String getText concode_elem_sep Rotation getRotation concode_elem_sep void reset concode_elem_sep void setPower concode_elem_sep void removeListener concode_elem_sep void setRotation concode_elem_sep void setDirection concode_elem_sep void setText