Initial commit

crates/ui/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "ui"
+edition.workspace = true
+version.workspace = true
+
+[lib]
+path = "src/lib.rs"
+
+[dependencies]
+mousefood.workspace = true
+ratatui.workspace = true
+embedded-graphics.workspace = true

crates/ui/src/lib.rs

@@ -0,0 +1,35 @@
+#![doc = "Shared UI helpers for firmware and simulator."]
+
+use std::error::Error;
+
+use embedded_graphics::prelude::{Dimensions, DrawTarget};
+use mousefood::prelude::*;
+use ratatui::{
+    Terminal,
+    style::Stylize,
+    widgets::{Block, Paragraph},
+};
+
+/// Returns the first shared text used by the simulator experiment.
+#[must_use]
+pub const fn hello_world() -> &'static str {
+    "Hello, world from Ratatui"
+}
+
+pub fn start_ui<D>(display: &mut D) -> Result<(), Box<dyn Error>>
+where
+    D: DrawTarget<Color = Rgb888> + Dimensions + 'static,
+{
+    let backend = EmbeddedBackend::new(display, EmbeddedBackendConfig::default());
+    let mut terminal = Terminal::new(backend)?;
+
+    terminal.draw(|frame| {
+        let widget = Paragraph::new(crate::hello_world().bold().yellow())
+            .block(Block::bordered().title("Vaka"))
+            .centered();
+
+        frame.render_widget(widget, frame.area());
+    })?;
+
+    Ok(())
+}