Extending strands on deletions

[mmguar]

Strands with either 5' or 3' end on a deletion cannot be extended without removing the deletion.
I understand the issue might be a little niche, as it might be somewhat uncommon to extend staples outside of the scaffold, but this issue might appear for sticky ends, or other kind of tails.

The pink staple here cannot be used to extend another strand, if the user tries to, the deletion will be removed and then the staple will be extended. The same happens if on the 5' end (in that case the pencil tool just does not work).
I cannot think of a good reason why this would not be allowed, but I might be missing something.

The behavior is identical in cadnano 2.

[sdouglas]

Hi, thanks for filing this issue and you're right that in principle the skip icons should not block editing of the underlying strands. Certain behavior like merging or breaking strands is a matter of changing how we propagate mouse events. Other types of editing can get more complex. In any case, we don't have any active Cadnano developers at the moment, so I will leave this issue open so we can revisit it if we get funding and hire someone in the future.

[mmguar]

Thank you. I will add that a good workaround is removing the skip, modifying the strand, and then re-adding the skip by clicking onto the scaffold (doing so on the staple does not seem to work)