feat(ecs): add event trait

3 files changed, 37 insertions, 19 deletions

diff --git a/ecs/examples/multiple_queries.rs b/ecs/examples/multiple_queries.rs
index 9a699c2..ed02a69 100644
--- a/ecs/examples/multiple_queries.rs
+++ b/ecs/examples/multiple_queries.rs
@@ -1,5 +1,6 @@
 use std::fmt::Display;
 
+use ecs::event::{Event, Id as EventId};
 use ecs::{Component, Query, World};
 
 #[derive(Component)]
@@ -57,16 +58,21 @@ fn do_attacks(
 }
 
 #[derive(Debug, PartialEq, Eq, Hash)]
-enum Event
+struct Start;
+
+impl Event for Start
 {
-    Start,
+    fn id(&self) -> EventId
+    {
+        EventId::of::<Self>()
+    }
 }
 
 fn main()
 {
-    let mut world = World::<Event>::new();
+    let mut world = World::new();
 
-    world.register_system(Event::Start, do_attacks);
+    world.register_system(&Start, do_attacks);
 
     world.create_entity((
         Health { health: 100 },
@@ -86,5 +92,5 @@ fn main()
     world.create_entity((AttackStrength::Strong,));
     world.create_entity((AttackStrength::Weak,));
 
-    world.emit(&Event::Start);
+    world.emit(&Start);
 }
diff --git a/ecs/examples/simple.rs b/ecs/examples/simple.rs
index 76d9538..9983c4a 100644
--- a/ecs/examples/simple.rs
+++ b/ecs/examples/simple.rs
@@ -1,3 +1,4 @@
+use ecs::event::{Event, Id as EventId};
 use ecs::{Component, Query, World};
 
 #[derive(Component)]
@@ -19,17 +20,22 @@ fn say_hello(query: Query<(SomeData, Greeting)>)
     }
 }
 
-#[derive(Debug, PartialEq, Eq, Hash)]
-enum Event
+#[derive(Debug)]
+struct Start;
+
+impl Event for Start
 {
-    Start,
+    fn id(&self) -> EventId
+    {
+        EventId::of::<Self>()
+    }
 }
 
 fn main()
 {
-    let mut world = World::<Event>::new();
+    let mut world = World::new();
 
-    world.register_system(Event::Start, say_hello);
+    world.register_system(&Start, say_hello);
 
     world.create_entity((
         SomeData { num: 987_654 },
@@ -43,5 +49,5 @@ fn main()
         Greeting { greeting: "Good evening".to_string() },
     ));
 
-    world.emit(&Event::Start);
+    world.emit(&Start);
 }
diff --git a/ecs/examples/with_local.rs b/ecs/examples/with_local.rs
index b37a5c3..0342930 100644
--- a/ecs/examples/with_local.rs
+++ b/ecs/examples/with_local.rs
@@ -1,4 +1,5 @@
 use ecs::component::Local;
+use ecs::event::{Event, Id as EventId};
 use ecs::system::{Into, System};
 use ecs::{Component, Query, World};
 
@@ -41,25 +42,30 @@ fn say_whats_up(query: Query<(SomeData, Name)>, mut state: Local<SayHelloState>)
     }
 }
 
-#[derive(Debug, PartialEq, Eq, Hash)]
-enum Event
+#[derive(Debug)]
+struct Update;
+
+impl Event for Update
 {
-    Update,
+    fn id(&self) -> EventId
+    {
+        EventId::of::<Self>()
+    }
 }
 
 fn main()
 {
-    let mut world = World::<Event>::new();
+    let mut world = World::new();
 
     world.register_system(
-        Event::Update,
+        &Update,
         say_hello
             .into_system()
             .initialize((SayHelloState { cnt: 0 },)),
     );
 
     world.register_system(
-        Event::Update,
+        &Update,
         say_whats_up
             .into_system()
             .initialize((SayHelloState { cnt: 0 },)),
@@ -69,9 +75,9 @@ fn main()
 
     world.create_entity((SomeData { num: 345 },));
 
-    world.emit(&Event::Update);
+    world.emit(&Update);
 
     println!("Haha");
 
-    world.emit(&Event::Update);
+    world.emit(&Update);
 }