SUMMARY In earlier KCM for the graphic tablets there was a way to edit the curve for pressure input data coming from the tablet. Artists have different style of painting, some press the tablet hard and some softly to make a mark. To adjust ones style artists use the pressure curve to regulate how much pressure is needed to make a mark on the canvas. This feature is missing in the newer implementation of the tablet KCM under wayland. Some pens have both eraser tip and normal tip so ideally pressure curve of both the sides needs to be adjusted. I am attaching a screenshot of the old tablet KCM to show the edit dialog. The edit dialog also showed the amount of pressure the artist is applying in blue to help them gauge it better.
Created attachment 151215 [details] screenshot showing the edit dialog
Created attachment 151216 [details] Screenshot showing an edited curve with bezier handles The red dots in the screenshot are bezier handles the artist can use them to tweak the curve. The position of the points can be moved too to set the maximum pressure or minimum starting pressure. To get an idea also check the pressure curve setting in krita
Created attachment 163147 [details] ^ img of a graph of a atypical pressure curve, but used for daily usage for "UGTABLET Artist Pro 16 (Gen2)". Hi, I just plug my voice here for **a big +1 to this**. I own right now a "UGTABLET Artist Pro 16 (Gen2)" and the pressure range is really long. I have to press a lot to reach 100% and it can hurts my hand to work this way. I have to fix that to set a pressure curve as you can see in attachement. In short: it reach 100% of the pressure at half, and the way to reach it is a bit "firm". A single slider "Firm" or "Soft" as on previous kcm_tablet panel couldn't fix this situation. Right now (on X11) and for the past 14 years, I had to set it with this interactive web GUI: https://linuxwacom.github.io/bezier.html to find the values, and then report them to xsetwacom this way `xsetwacom --set "UGTABLET Artist Pro 16 (Gen2) stylus" PressureCurve 90 85 15 100`). So, getting this one on the Wayland KDE kcm_tablet component is very important to me, as xsetwacom or any X11 configuration will disapear and the only possibility to fix my device will be now via the configuration panel of the D.E.
New features get the "Wishlist" severity; please leave it where it was.
Well I think this can be called as a regression since this is a downgrade from existing feature which is removed from plasma 5 to plasma 6. moreover this is not a optional feature. But anyway you can decide that thank you for your time.
Nothing got removed from Plasma 5 to Plasma 6. What you're referring to is the fact that the Wacomtablet KCM on X11 has this feature, but the Wayland-only Drawing Tablet KCM does not have it. That's not a removal, it's the lack of a feature in a new KCM. The lack of a feature on Wayland that exists on X11 isn't a bug; it's the lack of a feature.
For me as a user it doesn't matter if it is wayland or X11, user should not know if it is wayland or X11 what matter is that they are able to continue on their work. Plasma 5 had this feature in system settings section and the new plasma 6 system setting section it is not there. For me plasma 6 is next release of plasma 5 and you removed (did not implement it). You can't call a regression a wishlist. in any case I do not want to argue here as it is not contributing to this bug report. I have not changed the severity now as you instructed. But personally as a user this is a regression which needs to be fixed, and not stashed aside as a wishlist which is not important.
I understand completely, but again, no feature was removed. I can understand how it looks like that from your perspective, but this isn't actually what happened. And since this is a bug tracker, we need to keep things technical and accurate or else it becomes impossible for those of us who use it heavily to find anything. Thanks for understanding.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-desktop/-/merge_requests/1972