Move around a player character

actions.py

@@ -0,0 +1,14 @@
+class Action:
+    pass
+
+
+class EscapeAction(Action):
+    pass
+
+
+class MovementAction(Action):
+    def __init__(self, dx: int, dy: int):
+        super().__init__()
+
+        self.dx = dx
+        self.dy = dy

input_handlers.py

@@ -0,0 +1,30 @@
+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

main.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+import tcod
+
+from actions import EscapeAction, MovementAction
+from input_handlers import EventHandler
+
+
+def main() -> None:
+    screen_width = 80
+    screen_height = 50
+
+    player_x = int(screen_width / 2)
+    player_y = int(screen_height / 2)
+
+    tileset = tcod.tileset.load_tilesheet(
+        "dejavu10x10_gs_tc.png",
+        32,
+        8,
+        tcod.tileset.CHARMAP_TCOD
+    )
+
+    event_handler = EventHandler()
+
+    with tcod.context.new_terminal(
+        screen_width,
+        screen_height,
+        tileset=tileset,
+        title="Yet Another Roguelike Tutorial",
+        vsync=True,
+    ) as context:
+        root_console = tcod.Console(screen_width, screen_height, order="F")
+        while True:
+            root_console.print(x=player_x, y=player_y, string="@")
+
+            # Actually display on the screen
+            context.present(root_console)
+            root_console.clear()
+
+            for event in tcod.event.wait():
+                action = event_handler.dispatch(event)
+
+                if action is None:
+                    continue
+
+                if isinstance(action, MovementAction):
+                    player_x += action.dx
+                    player_y += action.dy
+                elif isinstance(action, EscapeAction):
+                    raise SystemExit()
+
+
+if __name__ == "__main__":
+    main()

requirements.txt

@@ -0,0 +1,2 @@
+tcod>=11.13
+numpy>=1.18