Re: Re: presentations in ConTeXt

["Thomas A. Schmitz" <thomas.schmitz@uni-bonn.de>]

Mojca,

thanks again, that's a useful trick! However, there is a command  
\interactionbar which seems to provide this functionality, and there  
is \setupinteractionbar, but the commands are somewhat  
underdocumented :-)
At least, I don't get any visible output on my slides when I include  
them; there seems to be some kind of secret...

(Your code doesn't compile here, it dies with this message:

This is MetaPost, Version 0.641 (Web2C 7.5.4)
(p-mpgraph.mp
 >> NOfPages-2
! Unknown relation will be considered false.
<to be read again>
                    )
l.118 if(NOfPages > 2)
                        and (PageNumber > 0): fraction :=  
(PageNumber-1)/(NOf...

?

Thanks, and best

Thomas

On Jul 15, 2005, at 9:46 PM, Mojca Miklavec wrote:

> Do you mean those "funny little things" which run from the beginning
> to the end as the presentation runs from the first towards the last
> slide?
>
> There are "PageNumber" and "NOfPages" variables defined somewhere in
> metafun. So you can say something like:
>
>     if(NOfPages > 2) and (PageNumber > 0):
>         fraction := (PageNumber-1)/(NOfPages-1)
>     else:
>         fraction := 1;
>     fi;
>
> And then you can do with it whatever you want. You can for example
> change slide colour:
>
>     SlideColour := fraction[\MPcolor[my color 1],\MPcolor[my color  
> 2]];
>
> or draw a progress bar:
>
>     fill unisquare xscaled fraction xyscaled size withcolor red;
>     draw unitsquare xyscaled size;
>
> An alternative are \pageno and \lastpage, defined inside ConTeXt.
>
> Hope this helps,
>     Mojca
>