linebender/druid

`request_anim_frame()` prevents redrawing in multi-window

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#2,339 创建于 2023年1月17日

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 (9 评论) (0 反应) (0 负责人)Rust (9,091 star) (567 fork)batch import
bughelp wanted

描述

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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贡献者指南

技术栈
rust
领域
frontend
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-2 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
needs investigation
前置要求
Basic knowledge of RustFamiliarity with druid's Widget trait
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
30
研究方向
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.