added tooltips

map_display.py

@@ -10,6 +10,7 @@ class MapDisplay:
     PATH_WIDTH = 5
     SEGMENT_SIZE = 20
     MIN_SEGMENT_LENGTH = 5
+    APP_NAME = "Train Journey - Map Display"
 
     def __init__(self,
                  surf: pygame.Surface,
@@ -25,7 +26,8 @@ class MapDisplay:
         self.max_lat: float = max_lat
         self.cities: list[tuple[Vec2, str, str]] = cities
 
-        self.font = pygame.font.SysFont("ubuntu", 20)
+        self.font: pygame.font.Font = pygame.font.SysFont("ubuntu", 20)
+        self._tooltip_surf: Optional[pygame.Surface] = None
 
     def real_to_screen(self, lon: float, lat: float) -> tuple[float, float]:
         x = (lon - self.min_lon) / (self.max_lon - self.min_lon)
@@ -116,12 +118,13 @@ class MapDisplay:
                         pygame.image.save(self.surf, path)
                         print(f"Saved as {path}")
 
+            pygame.display.set_caption(f"{self.APP_NAME} - {clock.get_fps():.2f}fps")
             self.render()
             pygame.display.flip()
             clock.tick(30)
 
     def init_interactive(self) -> None:
-        pass
+        self._tooltip_surf = pygame.Surface(self.surf.get_size(), pygame.SRCALPHA)
 
     def render(self) -> None:
         pass