Encapsulated winit into solar_engine. No winit is required anymore within the API

simulator/Cargo.toml

@@ -5,7 +5,6 @@ edition = "2021"
 
 [dependencies]
 solar_engine = { path = "../solar_engine" }
-winit = "0.30.10"
 log = "0.4"
 env_logger = "0.11.8"
 pollster = "0.4.0"

simulator/src/main.rs

@@ -1,16 +1,9 @@
 use cgmath::Rotation3;
-use solar_engine::{Application, Body, Simulator};
+use solar_engine::{Application, Body, Key, KeyState, Simulator};
 use std::sync::{Arc, RwLock};
 use std::thread;
-use winit::event::ElementState;
-use winit::event::WindowEvent::KeyboardInput;
-use winit::event_loop::EventLoop;
-use winit::keyboard::Key;
-use winit::platform::modifier_supplement::KeyEventExtModifierSupplement;
 
 pub async fn run() {
-    let event_loop = EventLoop::new().unwrap();
-
     let simulator = Arc::new(RwLock::new(Simulator::new()));
     {
         let mut sim = simulator.write().unwrap();
@@ -49,7 +42,8 @@ pub async fn run() {
 
     let simulator_clone = simulator.clone();
 
-    let mut window_state = Application::new().on_update(move |state| {
+    Application::new()
+        .on_update(move |state| {
             let sim = simulator_clone.read().unwrap();
             let bodies = &sim.bodies;
 
@@ -76,32 +70,30 @@ pub async fn run() {
                 .collect();
 
             state.set_instances(instances);
-    }).on_input(move |_state, event| {
+        })
-        if let KeyboardInput { event, .. } = event {
+        .on_input(move |_state, event| {
-            if event.state == ElementState::Pressed {
+            if event.state == KeyState::Pressed {
-                return match event.key_without_modifiers().as_ref() {
+                return match event.key {
-                    Key::Character(".") => {
+                    Key::Period => {
                         let mut sim = simulator.write().unwrap();
                         sim.increase_timewarp();
                         println!("Timewarp: {}", sim.get_timewarp());
                     }
-                    Key::Character(",") => {
+                    Key::Comma => {
                         let mut sim = simulator.write().unwrap();
                         sim.decrease_timewarp();
                         println!("Timewarp: {}", sim.get_timewarp());
                     }
-                    Key::Character("-") => {
+                    Key::Minus => {
                         let mut sim = simulator.write().unwrap();
                         sim.reset_timewarp();
                         println!("Timewarp: {}", sim.get_timewarp());
                     }
                     _ => {}
+                };
             }
-            }
+        })
-        }
+        .run();
-    });
-    
-    let _ = event_loop.run_app(&mut window_state);
 }
 
 fn main() {

solar_engine/src/application.rs

@@ -1,17 +1,19 @@
 use winit::application::ApplicationHandler;
-use winit::event::WindowEvent;
+use winit::event::{Modifiers, WindowEvent};
 use winit::event_loop::ActiveEventLoop;
 use winit::window::{Window, WindowId};
+use crate::input::{from_winit_input, InputEvent};
 
 pub struct StateApplication<'a> {
     state: Option<crate::state::State<'a>>,
+    modifiers: Modifiers,
     update_fn: Option<Box<dyn FnMut(&mut crate::state::State<'a>) + 'a>>,
-    input_fn: Option<Box<dyn FnMut(&mut crate::state::State<'a>, &WindowEvent) + 'a>>,
+    input_fn: Option<Box<dyn FnMut(&mut crate::state::State<'a>, &InputEvent) + 'a>>,
 }
 
 impl<'a> StateApplication<'a> {
     pub fn new() -> Self {
-        Self { state: None, update_fn: None, input_fn: None }
+        Self { state: None, update_fn: None, input_fn: None, modifiers: Modifiers::default() }
     }
     
     pub fn on_update<F: FnMut(&mut crate::state::State<'a>) + 'a>(mut self, func: F) -> Self {
@@ -19,10 +21,15 @@ impl<'a> StateApplication<'a> {
         self
     }
     
-    pub fn on_input<F: FnMut(&mut crate::state::State<'a>, &WindowEvent) + 'a>(mut self, func: F) -> Self {
+    pub fn on_input<F: FnMut(&mut crate::state::State<'a>, &InputEvent) + 'a>(mut self, func: F) -> Self {
         self.input_fn = Some(Box::new(func));
         self
     }
+
+    pub fn run(mut self) {
+        let event_loop = winit::event_loop::EventLoop::new().unwrap();
+        let _ = event_loop.run_app(&mut self);
+    }
 }
 
 impl<'a> ApplicationHandler for StateApplication<'a> {
@@ -56,13 +63,17 @@ impl<'a> ApplicationHandler for StateApplication<'a> {
                     
                     self.state.as_mut().unwrap().render().unwrap();
                 }
-                WindowEvent::KeyboardInput { .. } => {
+                WindowEvent::KeyboardInput { event, .. } => {
                     if let Some(state) = self.state.as_mut() {
                         if let Some(input_fn) = self.input_fn.as_mut() {
-                            input_fn(state, &event);
+                            let key_event = from_winit_input(&event, self.modifiers);
+                            input_fn(state, &key_event);
                         }
                     }
                 }
+                WindowEvent::ModifiersChanged(modifiers) => {
+                    self.modifiers = modifiers;
+                }
                 _ => {}
             }
         }

solar_engine/src/input.rs

@@ -0,0 +1,191 @@
+use winit::event::{ElementState, KeyEvent, Modifiers};
+use winit::keyboard::{Key as WinitKey, ModifiersKeyState};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Key {
+    // Symbols
+    Comma, Period, Minus, Plus, Slash, Backslash, Semicolon, Apostrophe,
+    LeftBracket, RightBracket, Grave, Equal,
+
+    // Digits
+    Num0, Num1, Num2, Num3, Num4, Num5, Num6, Num7, Num8, Num9,
+
+    // Letters
+    A, B, C, D, E, F, G, H, I, J, K, L, M,
+    N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
+
+    // Arrows
+    ArrowUp, ArrowDown, ArrowLeft, ArrowRight,
+
+    // Controls
+    Escape, Enter, Space, Tab, Backspace,
+    Insert, Delete, Home, End, PageUp, PageDown,
+
+    // Modifier keys
+    Shift, Control, Alt, Super,
+
+    // Function keys
+    F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12,
+
+    // Numpad
+    Numpad0, Numpad1, Numpad2, Numpad3, Numpad4,
+    Numpad5, Numpad6, Numpad7, Numpad8, Numpad9,
+    NumpadAdd, NumpadSubtract, NumpadMultiply, NumpadDivide, NumpadEnter,
+
+    // Unknown
+    Unknown,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum KeyState {
+    Pressed,
+    Released,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct KeyModifiers {
+    pub lshift: bool,
+    pub rshift: bool,
+    pub lcontrol: bool,
+    pub rcontrol: bool,
+    pub lalt: bool,
+    pub ralt: bool,
+    pub rsuper_key: bool,
+    pub lsuper_key: bool,
+}
+
+#[derive(Debug, Clone)]
+pub struct InputEvent {
+    pub key: Key,
+    pub state: KeyState,
+    pub text: String,
+    pub modifiers: KeyModifiers,
+}
+
+pub fn from_winit_input(event: &KeyEvent, modifiers: Modifiers) -> InputEvent {
+    InputEvent {
+        key: map_winit_key(&event.logical_key),
+        state: match event.state {
+            ElementState::Pressed => KeyState::Pressed,
+            ElementState::Released => KeyState::Released,
+        },
+        text: event.text.clone().unwrap_or_default().into(),
+        modifiers: KeyModifiers {
+            lshift: modifiers.lshift_state() == ModifiersKeyState::Pressed,
+            rshift: modifiers.rshift_state() == ModifiersKeyState::Pressed,
+            lcontrol: modifiers.lcontrol_state() == ModifiersKeyState::Pressed,
+            rcontrol: modifiers.rcontrol_state() == ModifiersKeyState::Pressed,
+            lalt: modifiers.lalt_state() == ModifiersKeyState::Pressed,
+            ralt: modifiers.ralt_state() == ModifiersKeyState::Pressed,
+            rsuper_key: modifiers.rsuper_state() == ModifiersKeyState::Pressed,
+            lsuper_key: modifiers.lsuper_state() == ModifiersKeyState::Pressed,
+        },
+    }
+}
+
+pub fn map_winit_key(key: &WinitKey) -> Key {
+    use Key::*;
+    match key {
+        WinitKey::Character(s) => match s.as_str() {
+            "a" | "A" => A,
+            "b" | "B" => B,
+            "c" | "C" => C,
+            "d" | "D" => D,
+            "e" | "E" => E,
+            "f" | "F" => F,
+            "g" | "G" => G,
+            "h" | "H" => H,
+            "i" | "I" => I,
+            "j" | "J" => J,
+            "k" | "K" => K,
+            "l" | "L" => L,
+            "m" | "M" => M,
+            "n" | "N" => N,
+            "o" | "O" => O,
+            "p" | "P" => P,
+            "q" | "Q" => Q,
+            "r" | "R" => R,
+            "s" | "S" => S,
+            "t" | "T" => T,
+            "u" | "U" => U,
+            "v" | "V" => V,
+            "w" | "W" => W,
+            "x" | "X" => X,
+            "y" | "Y" => Y,
+            "z" | "Z" => Z,
+            "0" => Num0,
+            "1" => Num1,
+            "2" => Num2,
+            "3" => Num3,
+            "4" => Num4,
+            "5" => Num5,
+            "6" => Num6,
+            "7" => Num7,
+            "8" => Num8,
+            "9" => Num9,
+            "," => Comma,
+            "." => Period,
+            "-" => Minus,
+            "+" => Plus,
+            "/" => Slash,
+            "\\" => Backslash,
+            ";" => Semicolon,
+            "'" => Apostrophe,
+            "[" => LeftBracket,
+            "]" => RightBracket,
+            "`" => Grave,
+            "=" => Equal,
+            _ => Unknown,
+        },
+        WinitKey::Named(n) => match n.to_text().unwrap_or("") {
+            "ArrowUp" => ArrowUp,
+            "ArrowDown" => ArrowDown,
+            "ArrowLeft" => ArrowLeft,
+            "ArrowRight" => ArrowRight,
+            "Escape" => Escape,
+            "Enter" => Enter,
+            "Tab" => Tab,
+            "Space" => Space,
+            "Backspace" => Backspace,
+            "Insert" => Insert,
+            "Delete" => Delete,
+            "Home" => Home,
+            "End" => End,
+            "PageUp" => PageUp,
+            "PageDown" => PageDown,
+            "Shift" => Shift,
+            "Control" => Control,
+            "Alt" => Alt,
+            "Super" => Super,
+            "F1" => F1,
+            "F2" => F2,
+            "F3" => F3,
+            "F4" => F4,
+            "F5" => F5,
+            "F6" => F6,
+            "F7" => F7,
+            "F8" => F8,
+            "F9" => F9,
+            "F10" => F10,
+            "F11" => F11,
+            "F12" => F12,
+            "Numpad0" => Numpad0,
+            "Numpad1" => Numpad1,
+            "Numpad2" => Numpad2,
+            "Numpad3" => Numpad3,
+            "Numpad4" => Numpad4,
+            "Numpad5" => Numpad5,
+            "Numpad6" => Numpad6,
+            "Numpad7" => Numpad7,
+            "Numpad8" => Numpad8,
+            "Numpad9" => Numpad9,
+            "NumpadAdd" => NumpadAdd,
+            "NumpadSubtract" => NumpadSubtract,
+            "NumpadMultiply" => NumpadMultiply,
+            "NumpadDivide" => NumpadDivide,
+            "NumpadEnter" => NumpadEnter,
+            _ => Unknown,
+        },
+        _ => Unknown,
+    }
+}

solar_engine/src/lib.rs

@@ -3,11 +3,21 @@ mod simulator;
 mod state;
 mod render;
 mod application;
+mod input;
 
 pub use body::Body;
+
 pub use simulator::Simulator;
 pub use simulator::distance_squared;
+
 pub use application::StateApplication as Application;
+
 pub use render::RenderInstance;
 pub use render::Shape;
+
 pub use state::State;
+
+pub use input::Key;
+pub use input::map_winit_key;
+pub use input::InputEvent;
+pub use input::KeyState;