Eraser toggle on Lamy button press

[bordaigorl]

I got a Lamy pen, which is compatible with reMarkable tips and works really well.
The pen has a handy button which would be useful as an eraser toggle, but unfortunately the remarkable ignores its events.
In /dev/input/event0 you get:

• type: 1 code: 331 value: 1 on button down
• type: 1 code: 331 value: 0 on button up

Would it be possible to patch the event loop so that these events are properly handled?

For me this solution would be even superior to the new Marker with eraser since I would be able to use the precision of the marker tip to erase...

[ddvk]

i have to get my hands on one.
i think you can get this to work without patching xochitl much

you can load qpa plugins e.g (
QT_QPA_GENERIC_PLUGIN=evdevtablet xochitl
or QT_QPA_GENERIC_PLUGIN=evdevkeyboard:/dev/input/event0 xochitil

will have to modify the plugin to emit some keycode (https://code.woboq.org/qt5/qtbase/src/platformsupport/input/evdevtablet/qevdevtablethandler.cpp.html)

[dstango]

I'm willing to sponsor you a Lamy as a little thank you for your great work. Send me a private message and we'll work out how you get one.

[ddvk]

I'm willing to sponsor you a Lamy as a little thank you for your great work. Send me a private message and we'll work out how you get one.

thanks, really appreciate it, but no need. i’ll order one

[slowan]

I got a Lamy pen, which is compatible with reMarkable tips and works really well.

Thanks for the pen tip. Luckily they just have it now on "a____n de" for just 29.

It would be awesome to have the eraser switch on the button.

[Tridens92]

Wow, this would be an incredible feature. Having no eraser is my biggest grip with rM v. 1. Just ordered a Lamy two weeks ago. I would be so grateful for this addition to an already incredible hack.

[ddvk]

while i'm waiting for the pen to arrive, i did some experiments. you can try if it works (early prototype)

https://github.com/ddvk/remarkable-stylus

the latest patches should respond to ctrl-u for toggling the eraser

[burgarth]

They do- amazing!!!! Thanks so much!!!

…

On 9 Jun 2020, at 1:26 am, ddvk ***@***.***> wrote: while i'm waiting for the pen to arrive, i did some experiments. you can try if it works (early prototype) https://github.com/ddvk/remarkable-stylus <https://github.com/ddvk/remarkable-stylus> the latest patches should respond to ctrl-u for toggling the eraser — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#19 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AIXIFPK3MS4HT2BWGUHGGQDRVT7KVANCNFSM4MX3VTQQ>.

[dstango]

Great, it works!!!
Suggestion (might be personal preference):
(right now a single button press toggles pen/eraser) -- it might be handy to have the button act like "while button pressed = eraser, while button released = pen", because the button is right in the reach of the index finger.
caveat: that might get tricky when lifting the pen while the button is still pressed, and then releasing the button too high up in the air.

[bordaigorl]

Thoroughly impressive!!!

Maybe I'm misunderstanding something: is this supposed to work with standard xochitl or only with a patched one?
If the latter: what is the minimal patch needed to make this work?

[ddvk]

Thoroughly impressive!!!

Maybe I'm misunderstanding something: is this supposed to work with standard xochitl or only with a patched one?

If the latter: what is the minimal patch needed to make this work?

only with the lastest patch

[bordaigorl]

I can confirm it works.
I would also prefer the eraser to be toggled back on button lift.
Well done!

[ddvk]

try this patch (with hold to erase)

sh -c "$(wget https://raw.githubusercontent.com/ddvk/remarkable-hacks/master/patch.sh -O-)" _ patch_06_1

[burgarth]

Thanks! This patch did not work for me, the button does not do anything with it. patch_06 works wonderfully though.

[dstango]

Patch 06_1 works like a charm for me -- eraser toggle back when lifting the button -- great!!!!
Thank you!

[slowan]

try this patch (with hold to erase)

sh -c "$(wget https://raw.githubusercontent.com/ddvk/remarkable-hacks/master/patch.sh -O-)" _ patch_06_1

Button doesn't work with 06_1 patch (switch nor hold). Note: ddvk/remarkable-stylus is installed on the device.

Patch 06 works flawlessly.

[ddvk]

Button doesn't work with 06_1 patch (switch nor hold). Note: ddvk/remarkable-stylus is installed on the device.

Patch 06 works flawlessly.

getting mixed feedback here, it should select the eraser as long as the button is kept pressed

[burgarth]

Just tried again, definitely does not do anything when button pressed with 06_1 while 06 works just fine. Restarted device in-between, did not help.

…

On 11 Jun 2020, at 7:22 pm, ddvk ***@***.***> wrote: Button doesn't work with 06_1 patch (switch nor hold). Note: ddvk/remarkable-stylus is installed on the device. Patch 06 works flawlessly. getting mixed feedback here, it should select the eraser as long as the button is kept pressed — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#19 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AIXIFPMSBRVBFEH4TTMYAE3RWCO5TANCNFSM4MX3VTQQ>.

[ddvk]

my pen should arrive today so i ll be able to test it

[slowan]

Button doesn't work with 06_1 patch (switch nor hold). Note: ddvk/remarkable-stylus is installed on the device.
Patch 06 works flawlessly.

getting mixed feedback here, it should select the eraser as long as the button is kept pressed

I have tried it again too with same results.

[AaronDavidSchneider]

In my case both options work flawlessly

[falevian]

Thanks! This patch did not work for me, the button does not do anything with it. patch_06 works wonderfully though.

Yo have to install also this:
sh -c "$(wget https://raw.githubusercontent.com/ddvk/remarkable-stylus/master/patch.sh -O-)"

[ddvk]

Button doesn't work with 06_1 patch (switch nor hold). Note: ddvk/remarkable-stylus is installed on the device.
Patch 06 works flawlessly.

getting mixed feedback here, it should select the eraser as long as the button is kept pressed

I have tried it again too with same results.
you sure you ran the patched version with the -plugin argument? anyway, added to install script

[burgarth]

you sure you ran the patched version with the -plugin argument? anyway, added to install script

Right, that must have fixed it. Thanks!!!!

[ddvk]

closing this one as fixed

[slowan]

Now it works. Possibly I haven't used the -plugin argument.