modular ui rework

src/overlays/custom.rs

@@ -0,0 +1,51 @@
+use std::sync::Arc;
+
+use glam::Vec3A;
+
+use crate::{
+    backend::overlay::{ui_transform, OverlayBackend, OverlayState},
+    config::{load_custom_ui, load_known_yaml, ConfigType},
+    gui::modular::{modular_canvas, ModularUiConfig},
+    state::AppState,
+};
+
+const SETTINGS_NAME: &str = "settings";
+
+pub fn create_custom(
+    state: &AppState,
+    name: Arc<str>,
+) -> Option<(OverlayState, Box<dyn OverlayBackend>)> {
+    let config = if &*name == SETTINGS_NAME {
+        load_known_yaml::<ModularUiConfig>(ConfigType::Settings)
+    } else {
+        match load_custom_ui(&name) {
+            Ok(config) => config,
+            Err(e) => {
+                log::error!("Failed to load custom UI config for {}: {:?}", name, e);
+                return None;
+            }
+        }
+    };
+
+    let canvas = match modular_canvas(&config.size, &config.elements, state) {
+        Ok(canvas) => canvas,
+        Err(e) => {
+            log::error!("Failed to create canvas for {}: {:?}", name, e);
+            return None;
+        }
+    };
+
+    let state = OverlayState {
+        name: name.clone(),
+        want_visible: true,
+        interactable: true,
+        grabbable: true,
+        spawn_scale: config.width,
+        spawn_point: Vec3A::from_array(config.spawn_pos.unwrap_or([0., 0., -0.5])),
+        interaction_transform: ui_transform(&config.size),
+        ..Default::default()
+    };
+    let backend = Box::new(canvas);
+
+    Some((state, backend))
+}