Add ship count to the header of the Fleet widget

battleship/tui/screens/game.py

@@ -83,19 +83,19 @@ def __init__(
 
         self.player_fleet = Fleet(
             id="player_fleet",
+            title="You",
             roster=strategy.roster,
             cell_factory=player_cell_factory,
             classes="player",
         )
-        self.player_fleet.border_title = "Your fleet"
         self.enemy_fleet = Fleet(
             id="enemy_fleet",
+            title="Enemy",
             roster=strategy.roster,
             cell_factory=enemy_cell_factory,
             allow_placing=False,
             classes="enemy",
         )
-        self.enemy_fleet.border_title = "Enemy fleet"
 
         self.board_map: dict[str, Board] = {
             self._player_name: self.player_board,

battleship/tui/styles.tcss

@@ -106,6 +106,7 @@ Fleet {
   scrollbar-size-vertical: 1;
   padding: 1 0;
   border: wide $accent;
+  border-title-align: center;
 }
 
 Fleet.player {

battleship/tui/widgets/fleet.py

@@ -5,7 +5,7 @@
 from textual.app import ComposeResult
 from textual.events import Mount
 from textual.message import Message
-from textual.reactive import var
+from textual.reactive import reactive, var
 from textual.widget import Widget
 from textual.widgets import Static
 
@@ -87,10 +87,12 @@ def action_preview(self) -> None:
 
 class Fleet(Widget):
     previewing_id: var[str] = var("")
+    ships_alive: reactive[int] = reactive(0)
 
     def __init__(
         self,
         *args: Any,
+        title: str,
         roster: Roster,
         cell_factory: CellFactory,
         allow_placing: bool = True,
@@ -107,7 +109,6 @@ def ship_factory(hp: int, damage: int, destroyed: bool) -> Text:
             damage_parts = [cell_factory.damaged().render() for _ in range(damage)]
             return Text.assemble(*(hp_parts + damage_parts), "\n")
 
-        self._roster = roster
         self._allow_placing = allow_placing
         self._previewing_id = ""
         self._ships: dict[str, Ship] = {
@@ -121,6 +122,10 @@ def ship_factory(hp: int, damage: int, destroyed: bool) -> Text:
             )
             for ship in roster
         }
+        self._title = title
+
+        self.ships_total = len(self._ships)
+        self.ships_alive = self.ships_total
 
     def watch_previewing_id(self, old: str, new: str) -> None:
         if old:
@@ -129,6 +134,9 @@ def watch_previewing_id(self, old: str, new: str) -> None:
         if new:
             self._ships[new].previewing = True
 
+    def watch_ships_alive(self) -> None:
+        self.update_title()
+
     def compose(self) -> ComposeResult:
         yield from self._ships.values()
 
@@ -144,3 +152,9 @@ def place(self, ship_id: str) -> None:
     def damage(self, ship_id: str) -> None:
         ship = self._ships[ship_id]
         ship.damage()
+
+        if ship.destroyed:
+            self.ships_alive -= 1
+
+    def update_title(self) -> None:
+        self.border_title = f"[{self.ships_alive}/{self.ships_total}] {self._title}"