Support choosing which player uses a controller

src/window/input.rs

@@ -42,7 +42,7 @@ impl InputWindow {
         }
     }
 
-    fn render_key_bindings(&mut self, ui: &mut Ui, sim_id: SimId) {
+    fn show_key_bindings(&mut self, ui: &mut Ui, sim_id: SimId) {
         let mappings = self.mappings.for_sim(sim_id);
         let binding_names = {
             let mapping = mappings.read().unwrap();
@@ -86,6 +86,37 @@ impl InputWindow {
                 }
             });
     }
+
+    fn show_gamepads(&mut self, ui: &mut Ui) {
+        let mut gamepads = self.mappings.gamepad_info();
+        gamepads.sort_by_key(|g| usize::from(g.id));
+
+        if gamepads.is_empty() {
+            ui.label("No gamepads connected.");
+            return;
+        }
+
+        for (index, gamepad) in gamepads.into_iter().enumerate() {
+            ui.horizontal(|ui| {
+                ui.label(format!("Gamepad {index}: {}", gamepad.name));
+                let mut bound_to = gamepad.bound_to;
+                let mut rebind = false;
+                rebind |= ui
+                    .selectable_value(&mut bound_to, Some(SimId::Player1), "Player 1")
+                    .changed();
+                rebind |= ui
+                    .selectable_value(&mut bound_to, Some(SimId::Player2), "Player 2")
+                    .changed();
+                rebind |= ui.selectable_value(&mut bound_to, None, "Nobody").changed();
+                if rebind {
+                    match bound_to {
+                        Some(sim_id) => self.mappings.assign_gamepad(gamepad.id, sim_id),
+                        None => self.mappings.unassign_gamepad(gamepad.id),
+                    }
+                }
+            });
+        }
+    }
 }
 
 impl AppWindow for InputWindow {
@@ -104,12 +135,14 @@ impl AppWindow for InputWindow {
             ui.horizontal(|ui| {
                 ui.selectable_value(&mut self.active_tab, InputTab::Player1, "Player 1");
                 ui.selectable_value(&mut self.active_tab, InputTab::Player2, "Player 2");
+                ui.selectable_value(&mut self.active_tab, InputTab::Gamepads, "Gamepads");
             });
         });
         CentralPanel::default().show(ctx, |ui| {
             match self.active_tab {
-                InputTab::Player1 => self.render_key_bindings(ui, SimId::Player1),
-                InputTab::Player2 => self.render_key_bindings(ui, SimId::Player2),
+                InputTab::Player1 => self.show_key_bindings(ui, SimId::Player1),
+                InputTab::Player2 => self.show_key_bindings(ui, SimId::Player2),
+                InputTab::Gamepads => self.show_gamepads(ui),
             };
         });
     }
@@ -130,4 +163,5 @@ impl AppWindow for InputWindow {
 enum InputTab {
     Player1,
     Player2,
+    Gamepads,
 }