LMMS/lmms

Effect/instrument window positions are not saved

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#7,842 opened on 2025年4月13日

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buggood first issuegui

説明

System Information

Arch Linux, GNOME

LMMS Version(s)

master

Most Recent Working Version

No response

Bug Summary

If you open any instrument/effect control windows, move them around, and then save the project, when you reopen the project the effect windows will all be closed. And when you go to reopen them, they do not appear in the same place.

This is in contrast to the default windows, such as the Song Editor or the Piano Roll, which keep their position between sessions.

Expected Behaviour

When saving a project, the position and visibility of all windows should be saved.

Steps To Reproduce

  1. Create a new project
  2. Add an effect/instrument
  3. Open the effect/instrument's controls window
  4. Move it around, and save the project
  5. Reopen the saved project
  6. The window is not visible, and not in the same place.

Logs

Screenshots / Minimum Reproducible Project

No response

Please search the issue tracker for existing bug reports before submitting your own.

  • I have searched all existing issues and confirmed that this is not a duplicate.

コントリビューターガイド

技術スタック
cpp
領域
desktop
Issue 種別
bug
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
3
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
half day
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
active
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
clear
前提条件
C++ basicsQt framework basics
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
60
調査方針
Investigate how the Song Editor and Piano Roll windows save and restore their position between sessions, likely through the project file serialization or window manager state. Look for relevant code in the LMMS source, such as in `src/gui/` or `src/core/`. Compare with the effect/instrument window classes to identify missing save/restore logic. Check if there is an existing mechanism for window state (e.g., `QWidget::saveState`/`restoreState` or custom serialization in `ProjectJournal`). Then implement similar persistence for instrument and effect windows.