Reveal content based on field content

[Danielo Rodríguez]

Hello,

I'm struggling my mind trying to realize how can I use the reveal widget to show or hide content based on the value of a tiddler field or even the absence of that field.

Documentation says that I can use text references in the reveal widget, but it does not work.

Regards

[Jeremy Ruston]

Hi Danielo

Can you show what you've tried? Did the examples on tiddlywiki.com help?

Best wishes

Jeremy

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Jeremy Ruston
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http://jermolene.com

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[Jed Carty]

This works on tiddlywiki.com:

<$reveal type='match' state='!!bob' text='eddie'>
Hi!
</$reveal>

If you put that in a tiddler it won't show anything unless the tiddler has a field called 'bob' with the content 'eddie'

[HansWobbe]

Jed:

Thank you very much for this  elegant little snippet.  In spite of thinking of myself as a bit of a power User, I am always amazed at just how much I haven't thought of, or have yet to realize.  This is a nest example that is a good reminder for me.

Thanks again for all of your contributions to this group.

Hans

[Danielo Rodríguez]

El martes, 13 de diciembre de 2016, 21:12:07 (UTC+1), HansWobbe escribió:

Jed:

Thank you very much for this  elegant little snippet.  In spite of thinking of myself as a bit of a power User, I am always amazed at just how much I haven't thought of, or have yet to realize.  This is a nest example that is a good reminder for me.

Thanks again for all of your contributions to this group.

Hans

I have to subscribe every word that Hans said. I consider myself a power user and I'm still getting sucked on this (kid of) basic problems.

Thank you very much.

[Danielo Rodríguez]

 Hello Jeremy

 

Did the examples on tiddlywiki.com help?

Best wishes

Jeremy

No, they did not. Because there is no example on the reveal widget about how to use text references. I'm used to use text refs within curly braces. You can add this topic to the list of confusing stuff.

Regards 

[Jed Carty]

What a text reference is isn't really explained anywhere that I have seen. I had to look at the code before I realised what was going on. The only time you see it in most  cases is as a transclusion using {{ and }}. I think this goes along with the differences between {, [ and < inside filters as one of the meaningful but non-obvious nuances in wikitext.

[Tobias Beer]

Hi Danielo / Jed / Hans

In general, I prefer to "reveal" stuff using the list widget, if possible.
Not only will this not create any superfluous html wrapper elements
where you may not need or want them, but it's even shorter...

<$list filter="[bob[eddie]]">
Hi!
</$list>

Instead of:

<$reveal type='match' state='!!bob' text='eddie'>
Hi!
</$reveal>

Best wishes,

Tobias.

[Jeremy Ruston]

This thread is interesting, I’d encourage the participants to try to help fix the documentation.

The TextReference documentation has most of the necessary parts of the explanation; it shows four examples of text references, and then several examples where text references can be used, including showing how a text reference is used with the transclusion syntax. There’s a broken link to IndirectAttributes, but even so, it should be clear on careful reading that {{blah!!field}} is not a text reference, but rather is a text reference used as the argument to a transclusion.

So, how do we make the distinction clearer than the existing text? Is it a matter of more examples? Simpler language? A note to specifically point out the confusion?

Best wishes

Jeremy

On 13 Dec 2016, at 21:03, Jed Carty <inmy...@gmail.com> wrote:

What a text reference is isn't really explained anywhere that I have seen. I had to look at the code before I realised what was going on. The only time you see it in most  cases is as a transclusion using {{ and }}. I think this goes along with the differences between {, [ and < inside filters as one of the meaningful but non-obvious nuances in wikitext.

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[Mark S.]

I was thinking that the first sentence might be replaced by something like:

A TextReference is the ''name'' of a tiddlywiki and optional field whose content contains text to be retrieved or modified by a widget or transclusion. Without the optional field reference, it refers by default to the text field of the named tiddler. Although TextReferences are used //by// transclusions, they are not the same as transclusions.

Mark

[Jeremy Ruston]

Hi Mark

Thanks. I took your text as a starting point and ended up with the following:

https://github.com/Jermolene/TiddlyWiki5/commit/4a45e9d2dcc6a19d47a2851e690accb9635e68e2

Any suggestions for further improvements gratefully received.

Best wishes

Jeremy

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[Thomas Elmiger]

Hi Jeremy

If I get that right, the tip at the end contains a typo (referent => reference) and could possibly be even clearer like:

<$macrocall $name=".tip" _="""Note the difference between a text reference such as `foo!!bar` (the name) and a transclusion of a text reference such as `{{foo!!bar}}` (the value)"""/>

Correct?

All the best!
Thomas (sent from mobile)

[Danielo Rodríguez]

El viernes, 16 de diciembre de 2016, 18:37:22 (UTC+1), Jeremy Ruston escribió:

Hi Mark

Thanks. I took your text as a starting point and ended up with the following:

https://github.com/Jermolene/TiddlyWiki5/commit/4a45e9d2dcc6a19d47a2851e690accb9635e68e2

Any suggestions for further improvements gratefully received.

Hello, for mi this fragment may be misleading 

+A TextReference is a general purpose way to identify a fragment of text from a tiddler.

 Looks like you could identify a subsection of the text or something like that.

Apart from that, the rest is a great improvement.

In my opinion it is just a matter of including more examples using text references on the widgets that accepts them. When I see a widget that accepts a text reference I'm always unsure about how use it, and  also it's usually the only part that is not included as an example

[Jeremy Ruston]

Thanks Thomas, Danielo,

I’ve made some further tweaks here:

https://github.com/Jermolene/TiddlyWiki5/commit/a2fe101848c4e4a02c3a6ac1d0e83b411cc4492e

Best wishes

Jeremy

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[Danielo Rodríguez]

Much clearer now