Bug 428321

Summary:	Selection Tools Have Unexpected Subtractive Behaviour
Product:	[Applications] krita	Reporter:	T.R.O Nunes <3rton93>
Component:	Tools/Selection	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	ahab.greybeard, tamtamy.tymona
Priority:	NOR
Version First Reported In:	4.3.0
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description T.R.O Nunes 2020-10-27 03:56:55 UTC

SUMMARY

The selection tools in Krita (4.3. 4.4. nightly 12 Oct) have inconsistent/unexpected behaviour in subtractive mode. 
When one has no pre-existing custom selection on the canvas (i.e the whole canvas is selected hence paintable) invoking a selection in subtractive mode unintuitively selects whatever shape is being draw, rather than selection everything else on the canvas. This behaviour is unexpected for two key reasons 
1) It has no distinctive behaviour compared to 'Replace' or 'Add' modes even thought it is a distinct mode.
2) The logical conclusion user makes "I'm SUBTRACTING this area from my paint-able area hence masking it off" results in unexpected result since what the tool actually does is the opposite of this expectation (When there is no pre-existing selection)

Though, considering this seems to be how it has always worked I'm assuming this is more of a design thing than a bug. Still I think it would be something worth altering eventually since it would make more sense that way.

STEPS TO REPRODUCE
1. Select lasso tool
2. Press S to enter subtractive mode
3. Draw around an object with the intention of removing its surroundings
4. Press delete

OBSERVED RESULT
You have deleted your object that you were trying to subtract from your selection

EXPECTED RESULT
You have deleted everything around your object.

SOFTWARE/OS VERSIONS 4.3 4.4
Windows: Win10

Comment 1 Ahab Greybeard 2020-10-28 12:05:39 UTC

I think the behaviour is logically correct though it can be confusing when first encountered.

By 'lasso tool', I assume you mean the Outline Selection tool?

In Steps To Reproduce, if I follow those steps excactly then everything outside the  drawn selction area is deleted, i.e the Expected Result. I don't understand why you see the 'enclosed' object being deleted.

If you want to discuss any aspect of application behaviour then the place for that is https://krita-artists.org/ where you can start a topic and exchange views and easily post screenshots to illustrate things.

Comment 2 T.R.O Nunes 2020-10-28 22:40:27 UTC

I was planning to make one yes since I'm assuming it will be filed as not a bug. Also, yes the outline selection tool.
It is surprising to me that you are getting opposite result, though. Maybe I need to try deleting everything again and get a clean install of krita.

Comment 3 Tiar 2020-11-04 00:15:27 UTC

Please reset your configuration: https://docs.krita.org/en/KritaFAQ.html#resetting-krita-configuration and check again. Make sure to check the Tool Options to see if 'S' really changes the selection tool mode; in my case it didn't do anything, so I had to change the mode myself.

Comment 4 Bug Janitor Service 2020-11-19 04:33:45 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
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If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 5 Bug Janitor Service 2020-12-04 04:34:22 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!