Create input_handlers.py

input_handlers.py

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+from typing import Optional
+
+import tcod.event
+
+from actions import Action, EscapeAction, MovementAction
+
+
+class EventHandler(tcod.event.EventDispatch[Action]):
+    def ev_quit(self, event: tcod.event.Quit) -> Optional[Action]:
+        raise SystemExit()
+
+    def ev_keydown(self, event: tcod.event.KeyDown) -> Optional[Action]:
+        action: Optional[Action] = None
+
+        key = event.sym
+
+        if key == tcod.event.K_UP:
+            action = MovementAction(dx=0, dy=-1)
+        elif key == tcod.event.K_DOWN:
+            action = MovementAction(dx=0, dy=1)
+        elif key == tcod.event.K_LEFT:
+            action = MovementAction(dx=-1, dy=0)
+        elif key == tcod.event.K_RIGHT:
+            action = MovementAction(dx=1, dy=0)
+
+        elif key == tcod.event.K_ESCAPE:
+            action = EscapeAction()
+
+        # No valid key was pressed
+        return action