[HowTo] a simple button to cycle in color palettes

[Mohammad]

Feature in Tiddlywiki 5.1.23

TW 5.123 has a new filter operator called cycle

https://tiddlywiki.com/prerelease/#cycle%20Operator

Using this filter operator it is simple to build a button to cycle in your color palettes!

See the how to in new Show and tell page of GitHub Discussion board.

https://github.com/Jermolene/TiddlyWiki5/discussions/5271

--Mohammad

[TW Tones]

Mohammad,

Thanks for sharing to the forum insight into features in the pre-release. 

• This pallet switch would be nice to allow users to choose there own pallet.

There are quite a few features that can simplify things people have wanted for a long time in the pre-release. More has being moved into the filters that will allow common use methods to be simpler to improvement.

Thanks for your "educational posts"

Tones

[TW Tones]

Mohammad,

I was looking at the filter you used and notice a shorter form for [[$:/palette]get[text] is {$:/palette}

<$button actions=<<cycle-palettes>> >

<$text text={{{ [{$:/palette}removeprefix[$:/palettes/]] }}}/>

</$button>

However this made me ask do we have the ability to have replaceable parameters in filters for common actions?

• This is off topic from your post but I had an interesting thought.

So consider this

\define cycle-palettes()

<$set name=pals filter="[all[tiddlers+shadows]tag[$:/tags/Palette]]">

<$action-listops $tiddler="$:/palette" $field="text" $subfilter="+[cycle<pals>]"/>

</$set>

\end

\define act(palette-name:"{{{ [{$:/palette}removeprefix[$:/palettes/]] }}}")

<$button actions=<<cycle-palettes>> >

<$text text=$palette-name$/>

</$button>

\end

<<act>>

Explanation

• Above here I simplify the button title by defining it with a parameter, unfortunately there is no short form to insist it be text
  • ultimately this is not shorter because of the overhead, but if  $palette-name$ could be defined once and used in many places it would be useful
  • but that is not how parameters are
• Using templates however we can make this simpler, see below, but it would be nice if we could have "global" $substitutions$ or similar?

\define cycle-palettes()

<$set name=pals filter={{palettes⒡}}>

<$action-listops $tiddler="$:/palette" $field="text" $subfilter="+[cycle<pals>]"/>

</$set>

\end

<$button actions=<<cycle-palettes>> >

{{<palette-name>}}

</$button>

;Now the tiddler "<palette-name>" contains  the following

```

<$text text={{{ [{$:/palette}removeprefix[$:/palettes/]] }}}/>

```

;Now the tiddler "palettes⒡" contains the following

:yes I am using a special unicode character here

```

[all[tiddlers+shadows]tag[$:/tags/Palette]]

```

Regards

Tony

On Sunday, 13 December 2020 at 17:34:52 UTC+11 Mohammad wrote:

[TiddlyTweeter]

Ciao Mohammad

Thanks for highlighting the new operator.

Very good! Makes buttons fly. CYCLE toggles are a very neat minimalist way to effect change.

Best wishes

TT
 

[Saq Imtiaz]

@Mohammad

You can simplify 

<$button actions=<<cycle-palettes>> > <$text text={{{ [[$:/palette]get[text]removeprefix[$:/palettes/]]}}}/> </$button> 

to:

<$button actions=<<cycle-palettes>> >

<$text text={{{ [{$:/palette}get[name]]}}}/>

</$button>

[Mohammad]

Thank you Saq. Your solution is minimal and semantic!

--Mohammad

[Mohammad Rahmani]

Hi Tony!

 Yes, I think I just focused on the cycle and no the whole snippets. I like your approach.

I myself have the simple solution!

Thank you

--Mohammad

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[Mohammad Rahmani]

Hi Josiah,

On Mon, Dec 14, 2020 at 12:42 PM TiddlyTweeter <Tiddly...@assays.tv> wrote:

Ciao Mohammad

Thanks for highlighting the new operator.

I myself am very interested to see new features discussed. This is an effort of what I have discovered! :-)

TW 5.1.23 has a lot of such great features!

 

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