events: implement a first attempt at an eventing system

src/main.rs

@@ -8,7 +8,11 @@ mod platform;
 mod animations;
 mod mappings;
 mod buffers;
+mod events;
 
+use events::Event;
+
+use crate::events::EventBus;
 use crate::platform::{DefaultBoard, Board};
 use crate::task::{FixedSizeScheduler, Scheduler};
 use crate::render::{Surfaces, Renderer};
@@ -39,10 +43,19 @@ fn main() {
 
     let mut renderer = FixedSizeScheduler::new([Box::new(Renderer::new(output, surfaces))]);
 
+    log::info!("Starting event bus");
+    let mut bus = EventBus::new();
+
     log::info!("Ready to rock and roll");
+    bus.push(Event::new_ready_to_rock());
     loop {
-        animations.tick();
-        system.tick();
-        renderer.tick();
+        let next_event = bus.next();
+        match next_event {
+            events::Event::Tick => (),
+            _ => log::info!("Event: {:?}", next_event)
+        }
+        animations.tick(&next_event, &mut bus);
+        system.tick(&next_event, &mut bus);
+        renderer.tick(&next_event, &mut bus);
     }
 }