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# Iced
[](https://travis-ci.org/hecrj/iced)
[](https://docs.rs/iced)
[](https://crates.io/crates/iced)
[](https://github.com/hecrj/iced/blob/master/LICENSE)
An opinionated GUI runtime for Rust, heavily inspired by Elm.
## Features
* Simple, easy to use API
* Responsive, flexbox-based layouting
* Type-safe, reactive programming model without weak references
* Built-in widgets
* Custom widget support
* Renderer-agnostic runtime
## Usage
Add `iced` as a dependency in your `Cargo.toml`:
```toml
iced = "0.1"
```
__Iced moves fast and the `master` branch can contain breaking changes!__ If
you want to learn about a specific release, check out [the release list].
[the release list]: https://github.com/hecrj/iced/releases
## Overview
Here is an example showcasing an interactive counter that can be incremented and
decremented using two different buttons:
```rust
use iced::{button, Button, Column, Text};
use crate::MyRenderer;
struct Counter {
// The counter value
value: i32,
// Local state of the two counter buttons
// This is internal widget state that may change outside our update
// logic
increment_button: button::State,
decrement_button: button::State,
}
// The user interactions we are interested on
#[derive(Debug, Clone, Copy)]
pub enum Message {
IncrementPressed,
DecrementPressed,
}
impl Counter {
// The update logic, called when a message is produced
fn react(&mut self, message: Message) {
// We update the counter value after an interaction here
match message {
Message::IncrementPressed => {
self.value += 1;
}
Message::DecrementPressed => {
self.value -= 1;
}
}
}
// The layout logic, describing the different components of the counter
fn layout(&mut self, window: &Window) -> Element<Message, MyRenderer> {
// We use a column so the elements inside are laid out vertically
Column::new()
.push(
// The increment button. We tell it to produce an
// `IncrementPressed` message when pressed
Button::new(&mut self.increment_button, "+")
.on_press(Message::IncrementPressed),
)
.push(
// We show the value of the counter here
Text::new(&self.value.to_string()).size(50),
)
.push(
// The decrement button. We tell it to produce a
// `DecrementPressed` message when pressed
Button::new(&mut self.decrement_button, "-")
.on_press(Message::DecrementPressed),
)
.into() // We can return a generic `Element` and avoid breaking
// changes if we redesign the counter in the future.
}
}
```
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