Introduce event-based input system

src/input/input.cpp

@@ -1,21 +1,44 @@
 #include "input.h"
 
-void Input::handle_keyboard_input(entt::registry &registry, Key const &key_input)
+#include <GLFW/glfw3.h>
+
+namespace Input {
+
+void KeyListener::key_event(KeyInput const& key_input_event)
 {
-    registry.ctx().erase<Key>();
-    registry.ctx().emplace<Key>(key_input);
+    auto& key_state = registry.ctx().emplace<State<KeyCode>>();
+
+    if (key_input_event.action == static_cast<Action>(GLFW_PRESS)) {
+        key_state.press(key_input_event.key_code);
+    } else if (key_input_event.action == static_cast<Action>(GLFW_RELEASE)) {
+        key_state.release(key_input_event.key_code);
+    }
 }
 
-void Input::handle_mouse_button_input(entt::registry &registry,
-                                      MouseButton const &mouse_button_input)
+void CursorListener::cursor_event(MouseMotion const& mouse_motion_event)
 {
-    registry.ctx().erase<MouseButton>();
-    registry.ctx().emplace<MouseButton>(mouse_button_input);
+    auto& mouse_motion = registry.ctx().emplace<MouseMotion>();
+    mouse_motion.delta += mouse_motion_event.delta;
 }
 
-void Input::handle_mouse_cursor_input(entt::registry &registry,
-                                      MouseCursor const &mouse_cursor_input)
+void reset_mouse_motion(entt::registry& registry)
 {
-    registry.ctx().erase<MouseCursor>();
-    registry.ctx().emplace<MouseCursor>(mouse_cursor_input);
+    auto& mouse_motion = registry.ctx().emplace<MouseMotion>();
+    mouse_motion = {};
 }
+
+template <typename T> void State<T>::init_state(entt::registry& registry)
+{
+    registry.ctx().emplace<State<T>>();
+}
+
+template <typename T> void State<T>::update_state(entt::registry& registry)
+{
+    auto& state = registry.ctx().get<State<T>>();
+    state.just_pressed_keys.clear();
+    state.just_released_keys.clear();
+}
+
+template class State<KeyCode>;
+
+} // namespace Input