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

[Steve F. <ste...@gm...>]

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.

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.)

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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