How does touch work in BanjleJS

So this is what i understand

• Bangle 1 - 2 touch zones
  
• bangle 2 - i2c for gestures and position of touch
  
  

There are two defines TOUCH_DEVICE and TOUCH_I2C.

• Touch_I2C - seems to only be enabled on Bangle 2

• Bangle 1 - bt4 and bt5 are used as "touch handlers"

So i know there are a few other watches. I just don't know how they get there touch positions from bangleJS? Most of the touch code is wrapped around either F18 or BQ3 defines.

I just don't know how they get there touch positions from bangleJS?

not sure I understand the question but does this https://www.espruino.com/Bangle.js2#touc­hscreen help?

That is helpful, but what i'm looking for is a little lower level.

So here's where the underlining code gets called to handle touch events

It gets called here. But this can only be reached by the bangle2 watch.

Here is where the bangle 1 gets its touch events from

So i know there's a few other watches that are supported with bangleJS and they have touch screens. So i'm curious how do they get there touch events. Since both of these touch event handlers are covered in defines that only work for the bangle watches.

So i know there's a few other watches that are supported with bangleJS and they have touch screens.

which ones?

if you mean the unofficial ones it is all in javascript
https://github.com/jeffmer/WatchApps/blo­b/master/apps/main/cst716-p8.js#L29
https://github.com/jeffmer/WatchApps/blo­b/master/apps/main-gw32/it7259.js#L34

So when i do a search for -DBANGLEJS in the board files i see these watches.

• Bangle - (F18)
  
• Bangle2
  
• ID205
  
• Dickens
  
• DTN01_F5
  

and when you check board files, there is no touchscreen defined in any of those 3.
I think only ID205 has in fact touchscreen, well at least some models, there are many of them, if you search youtube for reviews some have only touch button like https://youtu.be/alAb0gh9L9g?t=77

Ok, got it. Thanks so much for clearing this up for me! I've never used any of these watches. I just assumed that all smart watches used a full touch screen.

One last thing. There seems to be a touchscreen device. Which is different then the touch device. This seems to use SPI.

Do you know how these are handled? I see there's a STROKE lib for handling gestures. But i don't see a place to handle getting the position of the touch events when your not using bangleJS.

There seems to be a touchscreen device. Which is different then the touch device. This seems to use SPI.

Espruino is for many devices, banglejs is relatively new and just for watches, this one is quite old devboard with lcd with resistive touchscreen. Before Bangle this stuff was typically written as javascript module.
https://www.espruino.com/Touchscreen
https://www.espruino.com/modules/Touchsc­reen.js
https://www.espruino.com/ADS7843
https://www.espruino.com/Modules

Thanks for the info. I think i understand everything now.