On Wed, 25 Jan 2012, Wolfgang Schuster wrote:

>
> Am 25.01.2012 um 20:20 schrieb Philipp A.:
>
>> 2012/1/25 Hans Hagen <pragma@wxs.nl>
>> \ifmmode
>>
>> thanks. that was obvious…
>>
>> $\StrikeMe{x}$
>>
>> unfortunately this does the same as my tikz version: it exits math mode:
>>
>> $\StrikeMe{\ifmmode math mode! \else no math mode :( \fi} \ifmmode math mode. \else wat \fi$
>>
>> returns
>>
>> no math mode :( math mode.
>
> \framed puts the content in a \hbox and when you put a \hbox in a math 
> environment the text in the box is typeset in text mode, this feature is 
> used for the \text command. To get now the content of the \StrikeMe 
> command in math mode a different definition.
>
> \defineframed[StrikeMeFrame][background=strikeme,frame=off,offset=0pt,location=low,backgroundcolor=blue]
>
> \define[1]\StrikeMe
>  {\ifmmode
>     \StrikeMeFrame{$#1$}%
>   \else
>     \StrikeMeFrame{#1}%
>   \fi}

Better is to use: \StrikeMeFrame{\mathsurround\zeropoint$#1$}. But for 
this to work in subscripts and superscripts, you must use math palette. 
IIRC, \mframed does that. In principle:

\mframed[background=strikeme]{...}

should work (untested).

@Hans: Can we have \definemframed etc as well?

Aditya