https://bugs.kde.org/show_bug.cgi?id=407595
Bug ID: 407595
Summary: Pen -> Mouse switching shows mouse draw failure
Product: krita
Version: nightly build (please specify the git hash!)
Platform: Debian stable
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: tablet support
Assignee: krita-bugs-n...@kde.org
Reporter: ahab.greybe...@hotmail.co.uk
Target Milestone: ---
SUMMARY
This problem happens with appimages and does not happen with Windows builds.
It has been observed with a Debian 9 (Stable, fully updated) system using a
Wacom Intuos Paint tablet (CTH 490/K).
It's inconvenient but it's not a major problem. It happens on Debian 10
(Testing but under full freeze) in a different way as noted below.
This was tested with the 4.1.7 appimage and the latest (15th May) 4.2 alpha
appimage and Windows versions.
When changing from drawing with a pen to drawing with a mouse, the mouse does
not draw and the brush profile outline does not track the cursor. The cursor
must be moved off the workspace and then back to the canvas, as a 'recovery
method' in order to get the brush outline moving. After the cursor moves off
the workspace, the brush outline tracks the cursor as it returns to the
workspace. A single mouse click is needed (on the workspace border area or the
canvas) to get the mouse drawing again. Further, a mouse click before moving
off the workspace will result in that extra single mouseclick not being needed
after the cursor is brought back onto the canvas.
Other tools such as line tool, colour picker and selection tools show the same
mouse action failure and 'recovery method' characteristics.
Note: With the 4.1.7 appimage, the additional mouse click is not required to
enable drawing with the mouse after tracking has been recovered in the way
described above.
In Debian 10, the brush tracks the mouse after switching but a click on the
canvas is needed before it will draw.
In ADDITIONAL INFORMATION, tablet tester outputs for stylus to mouse transition
are shown for different krita versions and different operating systems. They
are all different.
STEPS TO REPRODUCE
1. Create a new image and zoom out a little to show a border area (for
convenience). Use the pen and Freehand Brush to draw with any brush preset.
Remove the pen from the tablet area.
2. Move the mouse and attempt to draw. Note the lack of drawing and lack of
brush outline response to the cursor.
3. Move the mouse off the workspace, e.g to an adjacent docker or the toolbar.
Note the brush profile outline will be removed from the canvas and will now
track the cursor as it returns to the workspace and the mouse will not draw on
the first attempt unless it is clicked on the workspace border or canvas area
first.
4. Also note that switching to drawing with a pen at any stage does not show
any problems but then switching back to the mouse repeats the mouse drawing
problem situation.
OBSERVED RESULT
As noted in STEPS TO REPRODUCE above.
EXPECTED RESULT
The mouse should be able to draw on the canvas after use of the pen.
SOFTWARE/OS VERSIONS
Krita
Version: 4.2.0-alpha (git 7a773b1)
Languages: en_GB, en
Hidpi: true
Qt
Version (compiled): 5.12.2
Version (loaded): 5.12.2
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 4.9.0-9-amd64
Pretty Productname: Debian GNU/Linux 9 (stretch)
Product Type: debian
Product Version: 9
Hardware Information
GPU Acceleration: auto
Memory: 16049 Mb
Number of Cores: 8
Swap Location: /tmp
ADDITIONAL INFORMATION
Tablet Tester: 4.2 alpha appimage Debian 9
---------------------------------------------------
Stylus press X=343.46 Y=19.28 B=1 P=4.0%
Stylus move X=344.64 Y=18.31 B=1 P=4.9% (DRAW)
Stylus move X=345.32 Y=17.45 B=1 P=5.0% (DRAW)
Stylus move X=346.16 Y=16.69 B=1 P=5.1% (DRAW)
etc
Stylus move X=347.67 Y=17.45 B=1 P=2.6% (DRAW)
Stylus move X=348.18 Y=17.45 B=1 P=0.0% (DRAW)
Stylus release X=348.18 Y=17.45 B=0 P=0.0%
(switch to mouse)
Mouse press X=305 Y=30 B=1
Mouse move X=305 Y=31 B=1
Mouse move X=302 Y=35 B=1
etc
Mouse move X=301 Y=43 B=1
Mouse move X=301 Y=44 B=1
Mouse release
Tablet Tester: 4.1.7 appimage Debian 9
-----------------------------------------------
Stylus press X=273.00 Y=19.41 B=1 P=16.3%
Mouse press X=272 Y=19 B=1
Stylus move X=272.16 Y=19.62 B=1 P=25.7% (DRAW)
Stylus move X=271.32 Y=19.84 B=1 P=29.3% (DRAW)
Mouse move X=271 Y=19 B=1
Stylus move X=270.64 Y=20.05 B=1 P=30.9% (DRAW)
Mouse move X=270 Y=20 B=1
etc
Stylus move X=265.93 Y=21.13 B=1 P=36.8% (DRAW)
Mouse move X=265 Y=21 B=1
Stylus move X=265.42 Y=21.56 B=1 P=20.3% (DRAW)
Stylus move X=265.42 Y=21.56 B=1 P=0.0% (DRAW)
Stylus release X=265.42 Y=21.56 B=0 P=0.0%
Mouse release
(switch to mouse)
Mouse press X=212 Y=71 B=1
Mouse move X=212 Y=72 B=1
Mouse move X=211 Y=75 B=1
etc
Mouse move X=207 Y=80 B=1
Mouse move X=207 Y=81 B=1
Mouse release
Tablet Tester: 4.2 alpha Windows 10
------------------------------------------------------
Pen tip brought near
Stylus press X=291.29 Y=26.20 B=1 P=15.3%
Mouse press X=291 Y=26 B=1
Stylus move X=290.62 Y=26.41 B=1 P=23.7% (DRAW)
Mouse move X=290 Y=26 B=1
Stylus move X=289.95 Y=26.52 B=1 P=27.1% (DRAW)
Mouse move X=289 Y=26 B=1
Stylus move X=289.44 Y=26.52 B=1 P=32.3% (DRAW)
etc
Stylus move X=271.08 Y=35.36 B=1 P=47.9% (DRAW)
Stylus move X=271.08 Y=34.93 B=1 P=22.6% (DRAW)
Mouse move X=271 Y=34 B=1
Stylus release X=271.08 Y=34.93 B=0 P=0.0%
Mouse release
Pen tip taken away
(switch to mouse)
Mouse press X=219 Y=96 B=1
Mouse move X=218 Y=101 B=1
Mouse move X=218 Y=102 B=1
Mouse move X=218 Y=104 B=1
etc
Mouse move X=214 Y=112 B=1
Mouse move X=214 Y=113 B=1
Mouse move X=213 Y=113 B=1
Mouse release
Tablet Tester: 4.2 alpha appimage Debian 10
--------------------------------------------------
Pen tip brought near
Stylus press X=254.26 Y=28.67 B=1 P=17.1%
Stylus move X=252.75 Y=29.53 B=1 P=19.5% (DRAW)
Stylus move X=251.23 Y=30.29 B=1 P=19.8% (DRAW)
Stylus move X=249.72 Y=31.15 B=1 P=20.5% (DRAW)
Stylus move X=248.71 Y=31.69 B=1 P=24.5% (DRAW)
etc
Stylus move X=242.31 Y=38.80 B=1 P=2.4% (DRAW)
Stylus move X=242.31 Y=38.80 B=1 P=0.0% (DRAW)
Stylus release X=242.31 Y=38.80 B=0 P=0.0%
Pen tip taken away
(switch to mouse)
Mouse press X=271 Y=63 B=1
Mouse move X=271 Y=63 B=1
Mouse move X=271 Y=64 B=1
Mouse move X=269 Y=70 B=1
etc
Mouse move X=260 Y=97 B=1
Mouse move X=259 Y=99 B=1
Mouse move X=257 Y=100 B=1
Mouse release
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