Hi Jeremy

I want the previous next function only to be visible in relevant tiddlers. 
Now it is added to the viewtemplate of all tiddlers. 
Is there a "hide- or showwhen" function which will hide/show the navigation 
panel from tiddlers based on tags - or sth. like that...?

Cheers Måns Mårtensson

Den torsdag den 28. november 2013 18.20.16 UTC+1 skrev Eric Shulman:
>
> On Thursday, November 28, 2013 8:02:18 AM UTC-8, Jeremy Ruston wrote:
>>
>> The next and previous filters that David wrote are now in the core, and 
>> so are available to use.
>> They work in association with the 'list' field, which is interpreted as a 
>> space-separated list of tiddler titles (using double square brackets to 
>> quote titles that contain a space). The next and previous filters both work 
>> in a similar way that's easiest to show with an example.
>>
>
> There are some error use cases I wonder about:
>
> Let's say you have a tiddler called "Lesson1" with the "list" field set to:
>> [[First Bit]] SecondBit FinalBit
>> You'll also need to create the named tiddlers.
>>
>
> What happens if a tiddler named in the list does not exist?
>  
>
>> Then, create a new tiddler called "Navigation" with the tag 
>> "$:/tags/ViewTemplate" and the following content:
>> Next: <$list filter="[is[current]next[Lesson1]]"/> / Previous: <$list 
>> filter="[is[current]previous[Lesson1]]"/>
>>
>
> What does the filter produce if the "Lesson1" tiddler is missing or the 
> list field is empty?
>
> Now if you open a tiddler like "SecondBit" you should see at the bottom 
>> the controls to move to the next and previous tiddlers.
>> The next and previous filter operators work by locating the currently 
>> selected tiddler(s) in the named list, and returning the adjacent next or 
>> previous tiddler from the list.
>>
>
> What if the same tiddler title in the named list more than once...  which 
> occurence does the filter match as the "current selected tiddler"?
> What does the [[Navigation]] template display if the current tiddler is 
> not in the list at all?
> When you reach the start/end of the list, does it loop around to the 
> end/start, or just stop?
> If navigation doesn't loop, when you reach the start/end, can display of 
> non-functional links be suppressed?
> Will there also be a [first[Lesson1]] and [last[Lesson1]] so a complete 
> "FPNL" (First/Previous/Next/Last) navigation bar can be displayed?
>
> enjoy,
> -e
>  
>

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