Add "Futuristic" Watch Face

[Leon-Plickat]

"Futuristic" Watch Face

This PR adds the "Futuristic" watch face, which is a simple (both in style and code) watchface, that is basically an analog clock but with circular gauges instead of watch-hands.

By default, no indicators are shown. If the heart-rate monitor is active, the rate is displayed in the lower left corner. If the watch is charging, the charging indicator as well as the current battery percentage is helpfully displayed in the top left corner. If the battery goes below 15%, a warning is displayed in the lower right corner.

The colours are based on the tango terminal colour scheme.

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Old / initial comment below:

Basically an analog clock, but with gauges instead of watch-hands.

This is implemented using the arc object. Unfortunately, switching to the clock screen from any other screen is tremendously slow when this face is active. I wonder if the arc object is inherently intensive to render? Not quite sure what to do about this. Unfortunately this only happens on the physical device, not the simulator.

• [x] make sreen switching faster
• [x] display battery icon when battery gets low
• [x] display indicator when charging
• [x] display heart rate icon when monitor is active
• [x] find a name that sounds a bit neater than "Gauge face"
• [x] long-top to cycle through colours
• [x] if a timer is active, can the countdown be displayed on the watchface? Yes, but that seems to be inefficient

[Leon-Plickat]

Seems like the screen switching can be sped up to reasonable times by reducing the amount of pixels drawn by the arc object.

[Leon-Plickat]

Turns out the amount of pixels is not really relevant, the issue is the background of the arc. Without the background, switching to the clock behaves as expected.

Even a background with line size of 1 caused this. Not quite sure why that is, I have no experience with embedded graphics, only desktop graphics.

While removing the background doesn't look quite as good, it has the added benefit of increasing the contrast of the gauges, probably making them easier to read for someone who has colourblindness or other vision problems.

[minacode]

I think it looks very cool without the background! 😎

[Leon-Plickat]

Now with switchable themes.

[Leon-Plickat]

Considering the requirement too keep it small as well as the size of a theme (5 * 3 * 8 = 120 bits), I think it makes sense to limit the amount of themes to maybe three or four. I have come to prefer the multi-colour ones over the single-colour ones, so I'll probably go with a few common terminal colour themes.

[minacode]

What do you think about using the PineTimeStyle settings that already exist for the theming? Could that be useful?

[Leon-Plickat]

Unfortunately not, I think. This watchface needs five colours that work together. At most PTSColourTime could be used for the inner text, but that might clash with the arc colours.

Now, I am not actually all that attached to the theming feature; I just thought it would be neat. If size constraints demand it, a hardcoded theme would be fine with me. I personally think the tango colours work best anyway (I tested a bunch more locally, gruvbox is also neat, but not quite to my taste).

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Another idea would be to determine the shades of the multi-coloured styles programmatically based on a single base colour. That's pretty simple to implement, although I don't think there is a generic colour chooser widget / setting yet, so I don't think this idea is actionable right now.

[minacode]

You could make it depend on the time 😁

[Leon-Plickat]

I played around with making it depend on time, but wasn't satisfied with the results.

So I am leaving the colours as is for now, meaning that other than finding a better name, I am pretty much done here.

Thinking about "futuristic" for the name or something like that.

[Leon-Plickat]

Yeah, I think this is done.

[Leon-Plickat]

All done.

Just wondering, why's the time displayed both with the gauges and digitally?

The digital display is for getting the accurate time, but I personally find that analog watches - and by extension things that emulate them like these gauges - allow for a better feel / intuition for small(-ish) timespans (probably because it maps time to something spatial, which humans are quite good at developing an intuition for).

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Build size and comparison to develop:	Section	Size	Difference
text	416404B	1520B
data	940B	0B
bss	53568B	0B