APP request: Drink counter

[espruino-discuss2]

Posted at 2022-07-05 by Hank

The only app that I now really miss from my Pebble is the Drink Counter:
https://www.reddit.com/r/pebble/comments/304ol2/app_drink_counter_preview_for_pebble_time/

Does anyone have the time to work on this? I might be willing to help, but time and skills are limited :)

[espruino-discuss2]

Posted at 2022-07-05 by @gfwilliams

Do you specifically want the blood alcohol level in there, or is it just for counting drinks?

I am reminded of https://www.youtube.com/watch?v=pETEq-nSQpE though...

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Posted at 2022-07-05 by Hank

Actually both :)

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Posted at 2022-07-05 by ajkm

I always thought that was an odd app on the Pebble - surely it isn't that hard to remember how many drinks one has had in a week?

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Posted at 2022-07-05 by Hank

Hey, this is just for science!

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Posted at 2022-07-05 by user140377

Hank, how about we do it the other way around. You develop the app and we help you :)

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Posted at 2022-07-06 by Hank

Yeah, well, I am more or less someone who can adjust code. Writing a whole new thing is something I am not that comfortable with.
However, what we need is

1. 4 way swipe (left/right to select item; up/down to increase/decrease amount)
2. Double tap (and confirm) to reset settings
3. Making sure you don't accidentally exit the app (remember, you probably had some alcohol for science)
4. The calculations
5. The images
6. A settings page for things like beer size, age, weight, sex etc.

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Posted at 2022-07-06 by user140377

ok, the good news is that already you have seen source code. Lets see if we can help you to create a new app. The most important in development: Do one thing at a time, not all 6 steps you have.

I suggest you start with the layout and before that you should have done the following three tutorials:
http://www.espruino.com/Bangle.js+Development
http://www.espruino.com/Bangle.js+First+App
http://www.espruino.com/Bangle.js+Layout

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Posted at 2022-07-06 by Mark_M

I think an ethanol sensor should be added via BLE.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6407881/

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Posted at 2022-07-07 by Hank

Looked into the oiginal Pebble sources. BAC calculation seems to be rather straigt forward. Will look into it on the weekend.
Adding a sensor is item 128374 on my list :)

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Posted at 2022-07-07 by Hank

Pushed a start template to
https://github.com/pebl-hank/BangleApps/tree/DrinkCounter/apps/drinkcounter
all work in progress

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Posted at 2022-07-07 by Hank

Lame question as I don't get the concept of the display buffer.
I cuccently do

	g.setBgColor(g.theme.bg).setColor(g.theme.bg).fillRect(0,145,176,176); //Clear
	g.setFont("Vector",20).setColor(g.theme.fg);
	g.drawString(drinks[activeDrink], (40 * (activeDrink + 1)) -20, 165);

But having this fillRect to clear the previous written number feels totally wrong. What is the right way to do it?

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Posted at 2022-07-07 by @gfwilliams

What is the right way to do it?

Just use clearRect (you don't need to set the color then since it used the background color).

However in an ideal world you might use the Layout library (http://www.espruino.com/Bangle.js+Layout) which would handle the positioning (and erasing of the background) for you - so then it'd all be in the right position on Bangle.js 1 too

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Posted at 2022-07-07 by Hank

Made pretty good progress. If someone wants to review the code for tweaks it would be the right time.
All that is missing is a settings page and a double check if the calculations are right. The settings are hard coded for now, but you get an idea of the app though.

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Attachments:

• screenshot_230.jpg

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Posted at 2022-07-07 by user140377

Settings tutorial is here: http://www.espruino.com/Bangle.js+App+Settings

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Posted at 2022-07-07 by Hank

I know how to do that - just no time for now :) .

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Posted at 2022-07-08 by fewieden

@hank on top of Gordon's suggestion with the layout module I would have those suggestions:

• Replace your custom time handling with the locale module https://www.espruino.com/Bangle.js+Locale

// Current time, e.g. 15:49
require("locale").time(new Date(), 1);

// First drink, e.g. 15:49
require("locale").time(firstDrinkTime, 1);

• You have a bunch of assignments like

a = a + 1;
b = b - 1;

that can be shortened to

a++;
b--;

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Posted at 2022-07-08 by Hank

To be honest, I get better along without the Layout library :)
I considered using the locales, but for BAC calculation I need a full time element including date to calculate the correct difference. Will work on that.
++ shortening is really necessary in the code clean up I will do when development is stable. Will do that then. Thanks for the suggestions!

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Posted at 2022-07-09 by Hank

The app should now be usable more or less. Thanks for the suggestions. PR pending...

I learned ther is no function to invert an image, is there?
Currently for the reset icon I use two different ones ant then decide by theme background which one to show. Is there a better way to do this?

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Posted at 2022-07-10 by fewieden

@hank if your icon is using 1 or 2bpp then you can style it by setting the FG and BG colors before rendering, see http://forum.espruino.com/conversations/377280/#comment16583897

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Posted at 2022-07-10 by Hank

Seems to be working fine. Thanks a lot!

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Posted at 2022-07-11 by @gfwilliams

Merged!

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Posted at 2022-07-11 by ajkm

Ha!

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Posted at 2022-07-11 by Hank

There ya go @ajkm - your new favorite app :)

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Posted at 2022-07-11 by ajkm

Well, I wouldn't go that far - and the number of times I drink in a week, and the number of drinks, can be counted on one hand usually!

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Posted at 2022-07-11 by user140377

You definitely need to increase your consumption because you must test this app.

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Posted at 2022-07-11 by Hank

It saves state now. So you could count the drinks per year...
And remember: it's for science!

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Posted at 2022-07-11 by ajkm

Well there's that, I suppose!

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Posted at 2022-07-12 by nicoboss

Any chance your scientific App could work with the Bangle.JS 1 ?

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Posted at 2022-07-12 by Hank

I really have to damit that I am too lazy to adopt it. The navigation concept I chose really needs a touch screen or 5 buttons. If someone is willing to work on that, please let me know :)

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Posted at 2022-07-12 by nicoboss

In fact, currently, the Bangle1 has 3 buttons and a two part touch screen (which can be extended to 3), left part and right part (the third being the middle if we consider a touch of both parts simultaneously). So the number of buttons/touches required could probably be satisfactory. I don't have the programming skills to do this portability, but I'm sure many here do, so maybe your scientific application will see the light of day on the Bangle1 :)

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Posted at 2022-07-12 by Hank

What current BJS1 app features all 5 Buttons to navigate? Maybe I can borrow some code for science...

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Posted at 2022-07-12 by Hank

Found a way - PR pending:
espruino/BangleApps#2041

Difference to BJS2 is that if all drinks are 0, it asks for reset because button 2 is needed to exit the app.