Re: [Audacity-quality] Time track copy-paste and aup3 import

[Peter S. <pet...@gm...>]

On Sat, Jan 30, 2021 at 4:21 PM Steve Fiddle <ste...@gm...>
wrote:

> Copy and Paste for time  tracks sounds to me like a major can of worms.
> Also, we have recorded precisely zero requests for this feature.
>


> I am strongly of the opinion that we should not implement copy / paste for
> time tracks until we have a much better implementation of time tracks.
>

It's not a question of whether we implement or not - you can already do it
- but you need to select in the audio
I only tried this with a single audio track and a time track.  I've no idea
how it works
a) in a multi-track project - with all or just some tracks with selected
audio
b) when some tracks are above and some below the Time track
c) what the interaction is with Sync-Lock (or other settings)
d) other use cases I haven't thought of yet.



> Regarding  importing a project, I think that if both the current project
> and the imported project have time tracks, the imported time track should
> replace  the current time track. (If the user prefers to retain the current
> time track, then they need to remove the time track from the project  that
> they intend to import.)
>

I think it should be the other way around.

If you are importing into a project that already has aTime Track then I
think that Time Track should be retained.

If the user wants the imported Time Track to be used then they should first
delete the Time Track in the primary project.

[image: image.png]
Peter.



> Steve
>
> On Sat, 30 Jan 2021 at 15:52, Paul Licameli <pau...@gm...>
> wrote:
>
>> James, please review these details.  Peter, maybe generate some bug
>> issues.
>>
>> How does copy and paste of time track work, and how should it?
>>
>> Short answer:  you can copy and paste time track points, even into a
>> project with an existing time track, though not all the behavior is
>> intuitive.
>>
>> Question:  If you import an .aup3 project with a time track, should that
>> do the same as paste (pasting at time 0 and shifting other control points
>> right), or should it replace the old time track with a new one (but maybe
>> losing some of your data)?  James argues for the second solution, I'm not
>> sure I agree.
>>
>> We need agreement on that to commit simplified code for aup3 import,
>> reducing the amount of sqlite3 calls we need to maintain.
>>
>> Details.
>>
>>
>>    1. Make new project with a time track and some control points, and
>>    some generated sound
>>    2. Select all Ctrl + A
>>    3. Select time track and deselect wave track with Ctrl + click
>>    4. Try to copy - dialog box tells you to select some audio
>>
>> That has been so at least since 2.3.1:  You can't copy if only time track
>> is selected.
>>
>> But, if time track is selected and another track -- then is it copied to
>> clipboard?  Since at least 2.3.1, yes, because then pasting into another
>> project makes a time track.  So a time track IS copyable.
>>
>> But in 2.3.1, the time track points were lost.  2.3.2 changed that.  Time
>> track points may be inserted into a time track that already exists and has
>> other points.  There may be discontinuities at the edges of the paste,
>> arguably correct or not.
>>
>> I also notice that if you have cut time & wave tracks, then paste into a
>> new project with only a time track -- then, whether the wave track pastes
>> or not, depends whether the time track is selected or not.  If it was, I
>> only paste time track.  Undo, click background, paste -- then both paste.
>>
>>
>>
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