GIMP 2.9 does not correctly interpret "Threshold" wacom parameter in Linux
Submitted by YAFU
Link to original bug (#793828)
Description
OS: Kubuntu Linux (KDE) 18.04 Kernel: 4.15.0-10-generic GIMP 2.9.9 from PPA repo Wacom Draw Graphic tablet: Bus 002 Device 003: ID 056a:033b Wacom Co., Ltd Pen stylus set as "Screen" in GIMP.
Hello. "Threshold" parameter determines how sensitive the tip of the pen should be in GUI software (buttons, sliders, tabs, etc.), but not within the canvas when draw. This is to avoid making changes to the GUI accidentally by just touching the tip with the interface. On canvas when one is drawing "Threshold" parameter should not interfere, but drawing on canvas with GIMP depends on "Threshold" value which is incorrect. As an example I will use a very large value to prove it:
$ xsetwacom --set "Wacom Intuos S 2 Pen stylus" Threshold 1500
With that value in MyPaint the tip of the pencil is still very sensitive inside the canvas when drawing, but not very sensitive in GUI program, like in buttons or sliders. This is how it should work.
But in GIMP with that value, when you draw on the canvas it is not sensitive, you must press the tip a lot to draw. Then "Threshold" parameter is having influence within the canvas, which is incorrect.
Version: 2.9.8