Box environment

[Robin Turner]

I've been doing some work on a layout sheet for my workmates (assuming that I 
can persuade them to start using LyX!) which involves a box environment - the 
idea is that your text appears in a centred box (which is something we do a 
lot).  What I have so far works OK, but the next Standard paragraph comes out 
on the same line as the box, so I need to kludge it by put in a blank line 
with a protected space.  Is there a more elegant way to do this?

The relevant parts of the layout file are as follows:

# Box style definition
# Adapted from a style by Herbert Voss

Style Box
  Margin                Static
  LatexType             Environment
  LatexName             myBox
  NextNoIndent          1
  LeftMargin            m
  RightMargin           m
  TopSep                0.5
  ParSep                0.5
  BottomSep             0.5
  Align                 Block
  AlignPossible         Block, Left, Right, Center
  LabelType             No_Label
  Font
    color               blue
  EndFont

#define the environment myBox

Preamble
    \newenvironment{myBox}{%
      \noindent%
      \begin{lrbox}{\@tempboxa}%
      \begin{minipage}[t]{0.5\columnwidth}%
    }{%
      \end{minipage}%
      \end{lrbox}%
      \fbox{\parbox{0.5\columnwidth}{\usebox{\@tempboxa}}}%
      \vspace{0.5ex}
    }%
EndPreamble