iced_native/
program.rs

1//! Build interactive programs using The Elm Architecture.
2use crate::{Command, Element, Renderer};
3
4mod state;
5
6pub use state::State;
7
8/// The core of a user interface application following The Elm Architecture.
9pub trait Program: Sized {
10    /// The graphics backend to use to draw the [`Program`].
11    type Renderer: Renderer;
12
13    /// The type of __messages__ your [`Program`] will produce.
14    type Message: std::fmt::Debug + Send;
15
16    /// Handles a __message__ and updates the state of the [`Program`].
17    ///
18    /// This is where you define your __update logic__. All the __messages__,
19    /// produced by either user interactions or commands, will be handled by
20    /// this method.
21    ///
22    /// Any [`Command`] returned will be executed immediately in the
23    /// background by shells.
24    fn update(&mut self, message: Self::Message) -> Command<Self::Message>;
25
26    /// Returns the widgets to display in the [`Program`].
27    ///
28    /// These widgets can produce __messages__ based on user interaction.
29    fn view(&self) -> Element<'_, Self::Message, Self::Renderer>;
30}
iced_native/program.rs

iced_native/
program.rs
