action editor in dope sheet cant be deleted after created new one #45535
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Reference: blender/blender#45535
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System Information
Operating system and graphics card
Blender Version
2.75a hashc27589e
Short description of error
action dope sheet cant be deleted after created new one
Exact steps for others to reproduce the error
1 open blender and add object in the scene
2 change to dope sheet editor
3 select action editor mode in dope sheet
4 click new
5 click "+" to create new one, must click multiple times
6 delete the previous one or rest of them
this file>> bug Action dope sheet.rar
Changed status to: 'Open'
Added subscriber: @yellowfoxz
#45554 was marked as duplicate of this issue
Added subscriber: @JulianEisel
Seems like this is the same issue as reported in #45554 - merging
Added subscriber: @motorsep
Can developers confirm the bug or is it going to be one of those who no one wants to touch with a long stick? (like it was with losing work if user wasn't manually assigned a few version back)
New development about this bug. Apparently, if Action is duplicated, but user is never assigned to it, it can be deleted by deleting it from NLA Editor (it's still backward, as there is no reason not to be able to remove Actions from Action Editor). Here is a video showing it:
https://www.youtube.com/watch?v=Z3H_RDnDf-g
However, if I click on F next to the Action I will need to delete, it's a done deal - it's there to stay no matter what I do.
It gets even weirder - the user who posted video showing how Actions that never got F pressed can be removed, can remove Actions even after having users on them. I followed his instructions to the tee, but when I save, users get assigned to the actions automatically:
https://www.youtube.com/watch?v=mtGTbqgnNJs
Added subscriber: @JoshuaLeung
Such a statement is complete rubbish and I hope you know that. If an issue isn't fixed within a reasonable amount of time than because it's not easy to fix it. The example you mention, possible loss of actions, was broken by design - a design that is deeply implemented into Blender's data structure. AFAIK it's still not fixed (which would require redesigning Blender's datablock system), but there were tools implemented that help prevent data loss.
Anyway... this is not a forum -> back to topic...
@JoshuaLeung, could you have a look? Not really an area I'm familiar with ;)
My bad, sorry.
I am wondering if there are user settings that might interfere with functionality (and thus some users don't have an issue and some do). I also wonder why not to just leave Shift +- [x] be as it worked for everyone as a good solution.
Added subscriber: @zeauro
It looks like duplication was thought to be done only once.
If you get rid of action active in Action Editor (by pushing it, stashing it, deleting it or replacing it by another), there is no stashing in NLA at new action creation.
There are several things going on here, so I'll go through them one by one to avoid confusing things further.
yellowfox's file
From the sound of things, it looks like this is just a case of not realising that we now hang on to all actions in the NLA.
Z3H_RDnDf-g
It looks like everything is behaving exactly as designed. The action stashing behaviours were put in place specifically to address complaints by various users that they were finding it far too easy to accidentally lose actions. In particular, the biggest complaints related to:
1a) The user firstly closes/unlinks the existing action, then presses "Add New" or simply inserts some new keyframes --> A "clean" start
1b) The user simply presses the "Add New" with the old action still active --> Easier/Lazier way of 1a OR a simple way to preserve an earlier version of the action
Now, were some of these methods overly heavy-handed? Perhaps...
There is an inherent conflict/tradeoff here between protecting user data and making it hard/cumbersome to get rid of data you don't want anymore. This arises because the computer ultimately cannot possibly know what your intentions are.
Given the feedback that was trickling in - i.e. "data shouldn't ever be lost", "users should tell the software when they want something deleted" - the available evidence pointed to a need to be conservative/cautious here and lean towards saving things more often.
mtGTbqgnNJs
OK, so if I understand correctly, the problem here is that the first three actions (named "0", "0.0001", "0.0002") which are shown as initially having 0 users before saving, are shown as having a Fake User after saving?
What is the exact sequence of steps taken to do reproduce this from a clean file? This shouldn't be happening, but I haven't found a way to reproduce this yet.
Shift X
OK, I guess it's reasonable to make some tweaks here so that if shift-clicking on the X will do the following:
Is this what you'd expect?
So I tried making simple scene from scratch to reproduce the bug, and I easily reproduced it.
Blend file: action_bug_test.blend
All I did was:
I never had issues with 2.74 - Shift + X button deleted Action, and aster saving/restarting Blender it was gone.
Unfortunately, I still can't reproduce any errors here. The actions in question are getting deleted as expected here after following the steps you've listed. Does this still happen in current master/buildbot builds?
I'll keep looking into this though, and will be making the Shift-X improvements proposed above.
Added subscriber: @Sergey
Changed status from 'Open' to: 'Archived'
First of all, no feedback on Joshua's request to test with latest builds. Since there are high possibility of the issue was already fixed it's crucial to test newest builds. So archiving for until it is confirmed the issue can be reproduced with latest builds from builder.blender.org.
P.S. Also seems Joshua made all planned modifications in the code now.