1 files changed, 152 insertions, 0 deletions
diff --git a/hud.py b/hud.py
new file mode 100644
index 0000000..179153c
--- /dev/null
+++ b/hud.py
@@ -0,0 +1,152 @@
+from game import Game, GameSprite
+from font import Font
+
+
+class ScoreCounterSprite(GameSprite):
+    """Single digit for a score counter"""
+
+    def __init__(self, game: Game):
+        """Initialise the score counter
+
+        :param game: The game which this belongs to
+        :type game: Game
+        """
+        self.number_images = []
+
+        self.x = 0
+
+        for i in range(10):
+            self.number_images.append(
+                Font.load_text(game.texture_factory, str(i)))
+
+        super().__init__(game, self.number_images[0])
+
+    def update_image(self):
+        """Update the digit"""
+        self.set_image(self.number_images[int(self.x % 10)])
+
+    def set(self, x):
+        """Set the image
+
+        :param x: number to set this digit to
+        """
+        self.x = x
+        self.update_image()
+
+
+class ScoreCounter:
+    """Sprite to display a number"""
+
+    def __init__(self, game: Game, num_digits, position=(0, 0)) -> None:
+        """__init__.
+
+        :param game:
+        :type game: Game
+        :param num_digits:
+        :param position:
+        :rtype: None
+        """
+        self.digits = []
+        x, y = position
+
+        self.number = 0
+
+        for i in range(num_digits):
+            sprite = ScoreCounterSprite(game)
+            sprite.set_pos((x+(Font.FONT_SIZE + 1)*i, y))
+            self.digits.append(sprite)
+
+    def set(self, number):
+        """Set the score to be displayed
+
+        :param number:
+        """
+        if number != self.number:
+            self.number = number
+            power = 10**len(self.digits)
+            for digit in self.digits:
+                power /= 10
+                digit.set((number // power) % 10)
+
+    def destroy(self):
+        """Remove this counter"""
+        for n in self.digits:
+            n.destroy()
+
+    def send_to_front(self):
+        """Move this counter to the foreground"""
+        for d in self.digits:
+            d.send_to_front()
+
+    def show(self):
+        """Make this counter visible"""
+        for d in self.digits:
+            d.show()
+
+    def hide(self):
+        """Make this counter invisible"""
+        for d in self.digits:
+            d.hide()
+
+
+class GameHud:
+    """Object to manage the items visible in the game's heads up display"""
+
+    SCORE_DIGITS = 8
+    HP_DIGITS = 2
+
+    def __init__(self, game) -> None:
+        """Initialise the HUD
+
+        :param game: The game which this belongs to
+        """
+
+        self.game = game
+        self.score_counter = ScoreCounter(game, GameHud.SCORE_DIGITS,
+                                          position=(
+                                              game.w
+                                              - GameHud.SCORE_DIGITS
+                                              * (Font.FONT_SIZE+1),
+                                              1)
+                                          )
+
+        self.hp_symbol = GameSprite(game, game.player.image)
+        self.hp_symbol.set_pos((1, 1))
+
+        x_image = Font.load_text(game.texture_factory, "x")
+        self.x_symbol = GameSprite(game, x_image)
+        self.x_symbol.set_pos((self.hp_symbol.x+self.hp_symbol.w+1, 1))
+
+        self.hp_counter = ScoreCounter(game, GameHud.HP_DIGITS,
+                                       position=(self.x_symbol.x+1 +
+                                                 self.x_symbol.w, 1)
+                                       )
+
+        self.items = (self.score_counter,
+                      self.hp_symbol,
+                      self.x_symbol,
+                      self.hp_counter)
+
+    def tick(self):
+        """Update the hud"""
+        self.score_counter.set(self.game.score)
+        self.hp_counter.set(
+            self.game.player.hp if self.game.player.hp > 0 else 0)
+
+        for x in self.items:
+            x.send_to_front()
+
+    def destroy(self):
+        """Remove all the associated objects"""
+        for x in self.items:
+            x.destroy()
+
+    def hide(self):
+        """Make this object invisible"""
+        for x in self.items:
+            x.hide()
+
+    def show(self):
+        """Make this object visible"""
+        for x in self.items:
+            x.show()