linebender/druid

It should be possible for a window to get its size from its contents

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#1246 opened on Sep 19, 2020

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 (7 comments) (0 reactions) (0 assignees)Rust (9,091 stars) (567 forks)batch import
D-Hardenhancementhelp wanted

Description

Currently, it seems that a window determines its size based on the value passed to it by the user and then forces its contents to be laid out within that size.

However, it's often more useful and convenient to do it the other way around: The window should use the usual box layout methods on its content to determine the best size for itself within the usual constraints (which should be user-settable on the window). Whether to do this, of course, should be an option settable on the window.

Furthermore, there should be separate options to control whether this size can grow and/or shrink in response to future layouts. This way, it's possible to have a completely dynamically sized window, where showing/hiding UI (for example) inside the window will automatically grow/shrink the window as well.

(I know druid is WIP, but I like it and I didn't see a way to do this nor an existing issue on it, so I've though to open one)

Contributor guide

Tech stack
rust
Domain
frontenddesktop
Issue type
feature
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.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Basic knowledge of RustUnderstanding of Druid's widget and layout system
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate how druid currently handles window sizing, likely in the WindowDesc or Window struct. Look at the layout pass and how constraints are passed. The issue suggests adding an option for dynamic sizing. Check for any existing discussions or related PRs. The goal is to design an API that allows a window to compute its size from its content and optionally grow/shrink.