linebender/druid

`request_anim_frame()` prevents redrawing in multi-window

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#2,339 opened on 2023年1月17日

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 (9 comments) (0 reactions) (0 assignees)Rust (9,091 stars) (567 forks)batch import
bughelp wanted

説明

I have a custom widget that has an animation. After opening two windows with it inside, I found only the focused one was redrawn. The other ones won't redraw even if there's a data change. After deleting request_anim_frame(), it would redraw if there's a data change, but as a result, it's impossible for me to update my animation. Why would this happen? Is multi-window simply just doesn't supports animation or are there any options for me to enable it?

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コントリビューターガイド

技術スタック
rust
領域
frontend
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。
1-2 days
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。
stale
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。
needs investigation
前提条件
Basic knowledge of RustFamiliarity with druid's Widget trait
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。
30
調査方針
Investigate the druid source code, particularly the windowing and animation scheduling logic in src/win handler.rs and src/widget/widget.rs. Examine how request anim frame() interacts with multiple windows. The user reports that removing the call fixes redrawing for data changes but breaks animation. Look for any window specific state that might cause animation requests to be ignored for unfocused windows. Check if there is a known limitation or bug in the multi window support. Review comments in the issue for any clues from maintainers.