- alignment: possible values are left/right/center (left is the default)
         The right and center alignments are computed using the width of the
         control (as given by the "width" attribute).
    - scrolling: possible values are auto/manual/none (auto is the default)
       * auto: same behaviour as before, the text automatically starts
         scrolling if it doesn't fit in the width of the control. The user can
         still drag it manually.
       * manual: only manual scrolling is possible
       * none: no scrolling possible