Imrpoved component structure

examples/components/mod.rs

@@ -10,6 +10,10 @@ impl Component for Velocity {
         apply_velocity(tick, self.0.x, &mut position.x);
         apply_velocity(tick, self.0.y, &mut position.y);
     }
+
+    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
+        self
+    }
 }
 
 fn apply_velocity(tick: u16, velocity: i32, x: &mut u16) -> bool {

examples/components/threads.rs

@@ -19,10 +19,11 @@ pub fn tick(engine: &Arc<Engine>) {
 }
 
 pub fn key(engine: &Arc<Engine>) {
+    crossterm::terminal::enable_raw_mode().unwrap();
+
     engine.thread("Main.key", |engine| {
         loop {
-            // Pass an event to the thread
+            engine.emit_event(crossterm::event::read().unwrap());
-            
         }
     });
 }

examples/cube.rs

@@ -3,8 +3,6 @@ pub mod components;
 use osmium::{renderer::Point, terminal};
 
 fn main() {
-    terminal::hide_cursor().unwrap();
-
     let engine = osmium::init();
 
     let my_rect = engine.entity(|r| {
@@ -15,6 +13,43 @@ fn main() {
 
     my_rect.component(components::Velocity(Point { x: 0, y: 0 }));
 
+    components::threads::tick(&engine);
+    components::threads::key(&engine);
+
+    engine.on_event({
+        let my_rect = my_rect.clone();
+        move |e: &crossterm::event::Event| {
+            if let Some(key_event) = e.as_key_event() {
+                match key_event.code {
+                    crossterm::event::KeyCode::Right => {
+                        my_rect.update_component(|c: &mut components::Velocity| {
+                            c.0.x = 100;
+                        });
+                    }
+                    crossterm::event::KeyCode::Left => {
+                        my_rect.update_component(|c: &mut components::Velocity| {
+                            c.0.x = -100;
+                        });
+                    }
+
+                    crossterm::event::KeyCode::Down => {
+                        my_rect.update_component(|c: &mut components::Velocity| {
+                            c.0.y = 100;
+                        });
+                    }
+                    crossterm::event::KeyCode::Up => {
+                        my_rect.update_component(|c: &mut components::Velocity| {
+                            c.0.y = -100;
+                        });
+                    }
+                    _ => {}
+                }
+            }
+        }
+    });
+
+    terminal::hide_cursor().unwrap();
+
     engine.start();
 
     terminal::show_cursor().unwrap();

src/entity.rs

@@ -1,4 +1,8 @@
-use std::sync::{Arc, Mutex, MutexGuard};
+use std::{
+    any::{Any, TypeId},
+    collections::HashMap,
+    sync::{Arc, Mutex, MutexGuard},
+};
 
 use crate::{Renderer, renderer::Point};
 
@@ -9,11 +13,13 @@ pub trait Component: Send + Sync {
     fn init(&mut self, entity: &Arc<Entity>) {}
     #[allow(unused_variables)]
     fn tick(&mut self, entity: &Arc<Entity>, tick: u16) {}
+
+    fn as_any_mut(&mut self) -> &mut dyn Any;
 }
 
 pub struct Entity {
     pos: Mutex<Point>,
-    components: Mutex<Vec<Box<dyn Component>>>,
+    components: Mutex<HashMap<TypeId, Box<dyn Component>>>,
     render: Box<dyn Fn(&mut Renderer) + Send + Sync>,
 }
 
@@ -21,13 +27,24 @@ impl Entity {
     pub fn new<F: Fn(&mut Renderer) + Send + Sync + 'static>(render: F) -> Arc<Self> {
         Arc::new(Self {
             pos: Mutex::new(Point { x: 0, y: 0 }),
-            components: Mutex::new(Vec::new()),
+            components: Mutex::new(HashMap::new()),
             render: Box::new(render),
         })
     }
 
     pub fn component<C: Component + 'static>(self: &Arc<Self>, c: C) {
-        self.components.lock().unwrap().push(Box::new(c));
+        self.components
+            .lock()
+            .unwrap()
+            .insert(TypeId::of::<C>(), Box::new(c));
+    }
+
+    pub fn update_component<C: Component + 'static, F: Fn(&mut C)>(self: &Arc<Self>, f: F) {
+        if let Some(c) = self.components.lock().unwrap().get_mut(&TypeId::of::<C>()) {
+            if let Some(c) = c.as_any_mut().downcast_mut::<C>() {
+                f(c)
+            }
+        }
     }
 
     pub fn render(self: &Arc<Self>, renderer: &mut Renderer) {
@@ -35,7 +52,7 @@ impl Entity {
     }
 
     pub fn tick(self: &Arc<Self>, tick: u16) {
-        for comp in self.components.lock().unwrap().iter_mut() {
+        for comp in self.components.lock().unwrap().values_mut() {
             comp.tick(self, tick);
         }
     }

src/lib.rs

@@ -3,6 +3,7 @@ pub mod renderer;
 pub mod terminal;
 
 use std::{
+    any::{Any, TypeId},
     collections::HashMap,
     sync::{Arc, Mutex},
 };
@@ -13,12 +14,14 @@ pub fn init() -> Arc<Engine> {
     Arc::new(Engine {
         threads: Mutex::new(HashMap::new()),
         entities: Mutex::new(Vec::new()),
+        event_cb: Mutex::new(HashMap::new()),
     })
 }
 
 pub struct Engine {
     threads: Mutex<HashMap<String, Arc<dyn Fn(&Arc<Self>) + Send + Sync>>>,
     entities: Mutex<Vec<Arc<entity::Entity>>>,
+    event_cb: Mutex<HashMap<TypeId, Vec<Arc<dyn Fn(&dyn Any) + Send + Sync>>>>,
 }
 
 pub fn sleep(ms: u64) {
@@ -46,6 +49,30 @@ impl Engine {
             .clone()
     }
 
+    pub fn on_event<E: Any + 'static, F: Fn(&E) + Send + Sync + 'static>(
+        self: &Arc<Self>,
+        callback: F,
+    ) {
+        self.event_cb
+            .lock()
+            .unwrap()
+            .entry(TypeId::of::<E>())
+            .or_insert_with(|| Vec::new())
+            .push(Arc::new(move |e| {
+                if let Some(e) = e.downcast_ref() {
+                    callback(e);
+                }
+            }));
+    }
+
+    pub fn emit_event<E: Any + 'static>(self: &Arc<Self>, event: E) {
+        if let Some(callbacks) = self.event_cb.lock().unwrap().get(&TypeId::of::<E>()) {
+            for cb in callbacks {
+                cb(&event)
+            }
+        }
+    }
+
     pub fn render(self: &Arc<Self>) {
         terminal::clear().unwrap();