How does Iced compare to egui or Slint for Rust GUI?

Iced uses a reactive, Elm-inspired architecture with cross-platform web support, while egui is immediate mode and Slint uses a declarative syntax. Iced is better for clean state management and web apps, but egui might be faster for prototypes, and Slint offers more mature tooling.

Is Iced production ready for desktop apps?

Iced is still experimental, so it's usable but may have breaking changes. For stable production apps, consider its roadmap and community support, or use it in projects where you can handle updates.

How to handle complex state management in Iced?

Iced encourages splitting state into modules using the update logic. For complex states, use Rust enums and structs, and leverage async support for external data, as shown in the examples with message handling.

Can I use Iced for mobile app development?

No, Iced currently supports only desktop and web platforms; mobile support for iOS and Android is not included, so it's not suitable for native mobile apps without significant modifications.

What are the performance implications of Iced for web apps?

Iced compiles to WebAssembly, which can lead to larger initial load sizes and potential performance overhead compared to JavaScript frameworks, but it offers Rust's safety and single-codebase benefits.

How to create a custom widget in Iced?

Define a custom widget by implementing the Widget trait, including state, message, view, and update logic. The documentation and examples provide guides on extending the library for specific needs.

Open-Awesome

iced

MITRust0.14.0

A cross-platform GUI library for Rust focused on simplicity, type-safety, and a reactive programming model inspired by Elm.

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30.7k stars1.6k forks0 contributors

What is iced?

Iced is a cross-platform GUI library for Rust that allows developers to build native desktop and web applications with a simple, type-safe API. It solves the challenge of creating maintainable and predictable user interfaces by adopting a reactive programming model inspired by Elm, splitting UI logic into state, messages, view, and update components.

Target Audience

Rust developers looking to build desktop or web applications with a focus on simplicity, type safety, and a clean architectural pattern. It's ideal for those who appreciate Elm's reactive model and want a batteries-included solution.

Value Proposition

Developers choose Iced for its straightforward, type-safe API and the predictability of its Elm-inspired architecture. Its modular design, cross-platform capabilities, and built-in tooling like debug metrics offer a comprehensive yet flexible solution for GUI development in Rust.

Overview

A cross-platform GUI library for Rust, inspired by Elm

Use Cases

Best For

Building desktop applications in Rust that need to run on Windows, macOS, and Linux
Creating web applications with Rust and WebAssembly using a single codebase
Implementing reactive user interfaces with a clear separation of state and view logic
Developing custom widgets or extending GUI functionality in Rust projects
Prototyping or building applications where type safety and maintainability are priorities
Integrating async operations and futures directly into GUI event handling

Not Ideal For

Projects requiring immediate, production-grade stability and long-term support
Applications with highly complex UI animations or real-time graphics rendering needs
Teams that prefer HTML/CSS-based styling or have extensive web UI expertise
Scenarios where a large ecosystem of third-party components and plugins is critical

Pros & Cons

Pros

Reactive Architecture Clarity

Inspired by Elm, it enforces a clean separation of state, messages, view, and update logic, making UI code predictable and maintainable, as demonstrated in the counter example with type-safe message handling.

Cross-Platform Simplicity

Builds native applications for Windows, macOS, Linux, and the web from a single Rust codebase, leveraging renderers like wgpu and tiny-skia for performance without platform-specific code.

Built-in Debugging Tools

Includes performance metrics and time-travel debugging, allowing developers to optimize and troubleshoot applications efficiently, as highlighted in the debug tooling features.

First-Class Async Support

Integrates Rust futures directly into the update logic, enabling seamless handling of asynchronous operations in GUI events without boilerplate code.

Cons

Experimental Status

As admitted in the README, Iced is currently experimental software, meaning it may have breaking changes, unstable APIs, and is not recommended for critical production use without careful evaluation.

Limited Widget Library

While it includes basic widgets, the ecosystem is smaller compared to mature GUI frameworks, often requiring custom widget development for advanced or niche UI components.

Learning Curve for Elm Model

Developers unfamiliar with reactive programming or The Elm Architecture might find the paradigm shift challenging, despite the provided examples and documentation.

Frequently Asked Questions

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