[mathesoncalum]

The idea here is that PolylinePlot should know nothing about actions etc. If a cancel action is called somewhere in the app, we should instead actively call a cancelEdit method on the polyline. In MuseScore Studio this looks like this, the solution for Audacity will look a bit different since the polylines are QML-based (this is a breaking change for Audacity since init no longer exists).

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Build configuration

audacity: audacity/audacity/master
audacity platforms: linux_x64
musescore: musescore/MuseScore/main
musescore platforms: linux_x64

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• framework/uicomponents/qml/Muse/UiComponents/polylineplot.cpp
• framework/uicomponents/qml/Muse/UiComponents/polylineplot.h

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Walkthrough

PolylinePlot no longer inherits Asyncable, Actionable, or Contextable, and it no longer registers an action://cancel handler. The class now exposes the invokable cancelEdit() method, which clears hover state and resets the gesture. The dragCancelled signal and init() method were removed. cancelEdit() does not emit dragCancelled.

Priority: Low

Merge Risk: Minimal · previous review 5c731

The change moves cancel handling from an action registration to an explicit cancelEdit() method. The repository has no in-tree consumers, so no concrete merge risk is evident. The author already notes that Audacity must migrate.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the motivation and proposed change, and it includes the AI-assistance disclosure and build configuration. However, it omits the required Resolves issue reference and most of t…	Add a GitHub issue number or link after “Resolves:”. Complete each required checklist item accurately, including the CLA, title, commit messages, coding rules, build and testing, prior attempts, and unnecessary changes. Complete the unit-te…
Docstring Coverage	⚠️ Warning	Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: reworking PolylinePlot cancellation logic.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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