LMMS / LMMS/lmms

1.3 Copy of Patterns is not possible

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bug
Dominant language
C++
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Forks
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Avg merge
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Merged PRs (30d)
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Description

### Bug Summary
It is not possible to copy/paste patterns in Pattern-editor

#### Steps to reproduce
Insert a pattern in one Beat-line and make a pattern
Right-click new pattern
Select Copy (img yellow)
Use _Create new_ pattern (img orange)
Point in new empty Beat-line
Right-click
Select paste
Nothing happens

#### Expected behavior
<1.3 the copied pattern is inserted in the empty Beat

#### Actual behavior
Copy does not work

#### Screenshot
![image](https://github.com/LMMS/lmms/assets/6662066/1648dec5-a336-401a-ac77-33f69c31770b)

Image show the context-selection after right-click

#### Affected LMMS versions
Windows >1.3-alpha

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the copy and paste steps in the Pattern-editor on the affected LMMS version. Trace the Copy, Create new, and Paste context-menu actions for patterns. Done means a copied pattern is inserted into the empty Beat-line after Paste.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
desktop
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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