dave: prepare for android

crates/notedeck_chrome/src/chrome.rs

@@ -0,0 +1,37 @@
+
+// Entry point for wasm
+//#[cfg(target_arch = "wasm32")]
+//use wasm_bindgen::prelude::*;
+
+pub struct Chrome {
+    active: i32,
+    apps: Vec<Box<dyn notedeck::App>>,
+}
+
+impl Chrome {
+    pub fn new() -> Self {
+        Chrome {
+            active: 0,
+            apps: vec![],
+        }
+    }
+
+    pub fn add_app(&mut self, app: impl notedeck::App + 'static) {
+        self.apps.push(Box::new(app));
+    }
+
+    pub fn set_active(&mut self, app: i32) {
+        self.active = app;
+    }
+}
+
+impl notedeck::App for Chrome {
+    fn update(&mut self, ctx: &mut notedeck::AppContext, ui: &mut egui::Ui) {
+        let active = self.active;
+        self.apps[active as usize].update(ctx, ui);
+        //for i in 0..self.apps.len() {
+        //    self.apps[i].update(ctx, ui);
+        //}
+    }
+}
+