keys or something idk

src/engine.rs

@@ -1,11 +1,13 @@
 use std::any::{Any, TypeId};
+use std::collections::HashSet;
 use std::rc::Rc;
 use std::time::Duration;
 
+pub use sdl2::keyboard::Keycode;
+
 use sdl2::{
     event::Event,
     image::{self, LoadTexture, Sdl2ImageContext},
-    keyboard::Keycode,
     pixels::Color,
     rect::Rect,
     render::{Canvas, Texture, TextureCreator},
@@ -64,6 +66,7 @@ where
     entities: &'context mut Vec<Entity>,
     systems: &'context mut Vec<Rc<dyn System>>,
     textures: &'context mut Vec<(Id, Texture<'game>)>,
+    currently_pressed_keys: &'context HashSet<Keycode>,
 }
 
 impl<'context, 'game> Context<'context, 'game> {
@@ -148,6 +151,10 @@ impl<'context, 'game> Context<'context, 'game> {
         system.on_add(self);
         self.systems.push(system)
     }
+
+    pub fn key_pressed(&self, keycode: Keycode) -> bool {
+        self.currently_pressed_keys.contains(&keycode)
+    }
 }
 
 pub trait System {
@@ -169,6 +176,7 @@ pub struct Game<'a> {
     components: Vec<(u64, Box<dyn Component>)>,
     systems: Vec<Rc<dyn System>>,
     textures: Vec<(Id, Texture<'a>)>,
+    currently_pressed_keys: HashSet<Keycode>,
 }
 
 impl<'game> Game<'game> {
@@ -200,6 +208,7 @@ impl<'game> Game<'game> {
             components: vec![],
             systems: vec![],
             textures: vec![],
+            currently_pressed_keys: HashSet::new(),
         })
     }
 
@@ -212,6 +221,12 @@ impl<'game> Game<'game> {
                         keycode: Some(Keycode::Escape),
                         ..
                     } => break 'running,
+                    Event::KeyDown { keycode, .. } => {
+                        self.currently_pressed_keys.insert(keycode.unwrap());
+                    }
+                    Event::KeyUp { keycode, .. } => {
+                        self.currently_pressed_keys.remove(&keycode.unwrap());
+                    }
                     _ => {}
                 }
             }

src/main.rs

@@ -10,7 +10,7 @@ use engine::Component;
 
 #[derive(Component)]
 struct Player {
-    sprite: Option<Sprite>,
+    sprite: Sprite,
 }
 
 #[derive(Component)]
@@ -36,13 +36,18 @@ impl System for PlayerRenderer {
             let &mut Position(x, y) = ctx.entity_component::<Position>(id);
             let player = ctx.entity_component::<Player>(id);
 
-            let sprite = player.sprite.unwrap();
-            ctx.draw_sprite(&sprite, x, y)?;
+            ctx.draw_sprite(&player.sprite, x, y)?;
         }
         Ok(())
     }
 }
 
+struct PlayerMovement;
+
+impl System for PlayerMovement {
+    fn on_update(&self, _ctx: &mut engine::Context) -> Result<(), engine::Error> {}
+}
+
 fn main() {
     let mut game = engine::Game::new().unwrap();
 
@@ -50,11 +55,6 @@ fn main() {
     context.add_system(Rc::new(PlayerRenderer));
     context.add_system(Rc::new(Gravity));
     let sprite = context.load_sprite("textures/player.png").unwrap();
-    context.spawn(vec![
-        Box::new(Player {
-            sprite: Some(sprite),
-        }),
-        Box::new(Position(16, 0)),
-    ]);
+    context.spawn(vec![Box::new(Player { sprite }), Box::new(Position(16, 0))]);
     game.run();
 }