[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[rplanchuelo]

https://bugs.kde.org/show_bug.cgi?id=385885

--- Comment #7 from rplanchu...@gmail.com  ---
There is a bug in a flameshot app, it is the same that this. 

https://github.com/lupoDharkael/flameshot/issues/227

Maybe is the bug in Qt?

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=385885

gryz...@outlook.com changed:

   What|Removed |Added

   See Also||https://bugs.kde.org/show_b
   ||ug.cgi?id=400921

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=385885

Nate Graham  changed:

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 CC||rplanchu...@gmail.com

--- Comment #6 from Nate Graham  ---
*** Bug 397815 has been marked as a duplicate of this bug. ***

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[Michael Reiher]

https://bugs.kde.org/show_bug.cgi?id=385885

Michael Reiher  changed:

   What|Removed |Added

 CC||r...@gmx.de

--- Comment #5 from Michael Reiher  ---
Same here. 2 Screens 3840x2160, side by side, scaled 1.5. When promting for
selection the image of the captured screens is moved to the left by half a
screen, the remaining half on the other end is filled with white. It's
impossible to do a rectangular selection on the left half of the left screen.

KDE 5.12.6

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=385885

bj.car...@gmail.com changed:

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[Dennis]

https://bugs.kde.org/show_bug.cgi?id=385885

Dennis  changed:

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 CC||m...@dennis-irrgang.com

--- Comment #4 from Dennis  ---
Created attachment 112369
  --> https://bugs.kde.org/attachment.cgi?id=112369=edit
Incorrect display of screenshot to be cropped

Same issue here.

I'd wager a guess that it's caused by using two monitors in combination with
(uneven) scaling (1.5).

Screen 0: minimum 320 x 200, current 4480 x 1440, maximum 8192 x 8192
eDP-1 connected primary 2560x1440+0+0 (normal left inverted right x axis y
axis) 309mm x 174mm
2560x1440 60.00*+  59.9959.9959.9659.95  
1920x1440 60.00  
1856x1392 60.01  
1792x1344 60.01  
2048x1152 59.9959.9859.9059.91  
1920x1200 59.8859.95  
1920x1080 60.0159.9759.9659.93  
1600x1200 60.00  
1680x1050 59.9559.88  
1400x1050 59.98  
1600x900  59.9959.9459.9559.82  
1280x1024 60.02  
1400x900  59.9659.88  
1280x960  60.00  
1440x810  60.0059.97  
1368x768  59.8859.85  
1280x800  59.9959.9759.8159.91  
1280x720  60.0059.9959.8659.74  
1024x768  60.0460.00  
960x720   60.00  
928x696   60.05  
896x672   60.01  
1024x576  59.9559.9659.9059.82
960x600   59.9360.00
960x540   59.9659.9959.6359.82
800x600   60.0060.3256.25
840x525   60.0159.88
864x486   59.9259.57
700x525   59.98
800x450   59.9559.82
640x512   60.02
700x450   59.9659.88
640x480   60.0059.94
720x405   59.5158.99
684x384   59.8859.85
640x400   59.8859.98
640x360   59.8659.8359.8459.32
512x384   60.00
512x288   60.0059.92
480x270   59.6359.82
400x300   60.3256.34
432x243   59.9259.57
320x240   60.05
360x202   59.5159.13
320x180   59.8459.32
DP-1 connected 1920x1200+2560+0 (normal left inverted right x axis y axis)
518mm x 324mm
1920x1200 59.95*+
1920x1080 60.00
1600x1200 60.00
1680x1050 59.95
1280x1024 60.02
1280x960  60.00
1024x768  60.00
800x600   60.32
640x480   59.94
720x400   70.08

Two different resolutions to boot.

Trying to select a region to take a screenshot of results in the screen I've
attached a photo of. The program seems to take a screenshot that you then
select the part you want to crop, however the screenshot taken is not aligned
with the actual monitors, so I'm unable to select about half of the screen to
the left.

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[Henrik Fehlauer]

https://bugs.kde.org/show_bug.cgi?id=385885

Henrik Fehlauer  changed:

   What|Removed |Added

 CC||rk...@lab12.net

--- Comment #3 from Henrik Fehlauer  ---
Thanks for the video Clemens, that goes a long way in understanding what "The
secondary monitor goes white." from the original report actually means.

I can reproduce the issue in a VM. Preliminary findings:
- Does not depend on compositing vs. non-compositing code path.
- Actual resolution of the monitors is irrelevant, you just need at least two.
- "QT_SCALE_FACTOR=1.4 spectacle -rb" is enough, no need for session scaling.
- Other methods of capturing are fine.
- For 2.1x scaling or different resolutions, the white area can sometimes
appear at the bottom.
- The displacement depends on the scaling factor.
- The displacement depends on the amount of overlap of both displays in
"kcmshell5 kcm_kscreen".

Thus the issue is probably somewhere in the UI of the rectangular region
picker, perhaps only some scaling factor or a term in some calculation missing.

Let us know if you want to try to come up with a patch, we can get you started.

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[Clemens Eisserer]

https://bugs.kde.org/show_bug.cgi?id=385885

Clemens Eisserer  changed:

   What|Removed |Added

 CC||linuxhi...@gmail.com

--- Comment #2 from Clemens Eisserer  ---
I can reproduce this issue with Spectacle 17.12.1, same setting as the original
reporter: 4k main display + FullHD and some scaling factor applied (1.4 in my
case)

However, contrary to the duplicate suggestion (Bug 381528), the cursor
correctly apperas and I can perform a sepection - it is just the selection area
doesn't correctly show both monitors. Please see the following video:
https://youtu.be/BMzENE6t1kE

So I think this bug is valid for its own and reproduceable.

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[Clemens Eisserer]

https://bugs.kde.org/show_bug.cgi?id=385885

Clemens Eisserer  changed:

   What|Removed |Added

 Status|UNCONFIRMED |CONFIRMED
 Ever confirmed|0   |1

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=385885

--- Comment #1 from Nate Graham  ---
Also sounds a bit like https://bugs.kde.org/show_bug.cgi?id=381528

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[Spectacle] [Bug 385885] Rectangular Region Selection doesn't work w/ scaling on multiple monitors

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=385885

Nate Graham  changed:

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 CC||pointedst...@zoho.com

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