On Monday, October 12, 2020 at 12:17:40 AM UTC-7, Shareda wrote:
>
> TW Tones, here is an example code from UI preferences:
> <$reveal type="match" state="$:/hb/Scrollable" text="yes">
> <$edit-text tiddler="$:/hb/CiteDivHeight"
> default="600" size="1" rows="1" autoHeight="no"tag=input/> <$range
> tiddler="$:/hb/CiteDivHeight" min="300" max="999"
> default="600" increment="10" tooltip='300-999px'/>
> </$reveal>
> Instead of this I can use List like <$list
> filter='[all[$:/hb/Scrollable]get[text]prefix[yes]]'>
> and so on.
>
Just a few notes about the example $list you posted:
The all[...] operator takes one or more *keywords* (current, missing,
orphans, shadows, tags, tiddlers) as a parameter, not a tiddler title.
To specify a literal tiddler title, use title[TiddlerName] or just
[TiddlerName], like this:
<$list filter='[[$:/hb/Scrollable]get[text]prefix[yes]]'>
In place of the combination of [TiddlerName]get[text], you could write
{TiddlerName!!text}, like this:
<$list filter='[{$:/hb/Scrollable!!text}prefix[yes]]'>
By default, the $list widget sets "currentTiddler" within the body of the
<$list>...</$list>.
Thus, in your example code, the value of <<currentTiddler>> within the
$list body will be "yes".
To leave the value of currentTiddler unchanged, you must specify an
alternative variable name, like this:
<$list filter='[[$:/hb/Scrollable]get[text]prefix[yes]]'
variable="something">
As an alternative, you could also preserve the value currentTiddler by
adding "then<currentTiddler>" at the end of your test, like this:
<$list filter='[[$:/hb/Scrollable]get[text]prefix[yes]then<currentTiddler>
]'>
Of course, if you don't use the result within the body of the $filter (as
in your example, which explicitly specifies tiddler="$:/hb/CiteDivHeight"),
then you can omit the variable="..." syntax entirely.
Even so, it's a good convention to use a variable whenever the $list is
just being used as a conditional test. I like to use a name that describes
the purpose of the test, like this:
<$list filter='[[$:/hb/Scrollable]get[text]prefix[yes]]'
variable="if_scrollable_flag_is_set">
enjoy,
-e
>
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