linebender/druid

`request_anim_frame()` prevents redrawing in multi-window

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#2,339 opened on Jan 17, 2023

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bughelp wanted

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Description

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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Contributor guide

Research direction
Investigate the implementation of `request anim frame()` in druid's window handling code, focusing on the event loop and how it manages multiple windows. Check if the animation request is only being processed for the focused window and if there is a missing broadcast to other windows.
Tech stack
rust
Domain
frontend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rustdruid
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70