Is re-rendering of tiddlers w/o user interaction possible?

[Hubert]

Hi everyone,

If I understand correctly, most content within a tiddler is static. Inline javacript is not allowed, so macros will only re-calculate their output on user interaction with a tiddler. For example, the <<now>> macro or Evan Balster's <<formula>> macro will recalculate their output when the built-in "More actions" TW button is pressed (it's located in the upper-right corner of each tiddler frame).

What I'm trying achieve is make stuff happen with time being the trigger. The simplest example would be building an auto-updating clock using the <<now>> macro (this could be faked using SVG animations but that's not what I'm looking for). Another example would be a reveal widget that will suddenly display content when the current time matches a predefined value but without any user interaction whatsoever. Such a solution would need to somehow 'see' on its own that the time has changed. Is this possible?

Thank you in advance for sharing your ideas/knowledge.

-Hubert

[Hubert]

OK, I've found this plugin by Evan Balster, version 0.0.1 that does exactly what I'm looking for.

That said, I'd still love to hear your ideas though, especially the background TW mechanics/limitations/other solutions to this problem.

Thank you,

Hubert

[Jeremy Ruston]

Hi Hubert

Evan’s plugin is the right thing to use if you can; the core doesn’t include a builtin clock/timer because my early experiments showed that it can be quite punishing on power consumption/battery life.

Best wishes

Jeremy

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[Hubert]

Thank you Jeremy for sharing this. It's a fair point and worth taking into consideration (it could negatively sway the cost-benefit ratio in some situations).

Best regards,

Hubert