1 files changed, 127 insertions, 0 deletions
diff --git a/boss_key.py b/boss_key.py
new file mode 100644
index 0000000..70a6e52
--- /dev/null
+++ b/boss_key.py
@@ -0,0 +1,127 @@
+from config import Config
+from game import Game
+
+
+class BossKey():
+    """Object which manages the 'boss key' feature
+       When a key is pressed, then the screen switches to a "work"
+       related image
+    """
+
+    FG = "#ffaa00"
+    BG = "#aaaaaa"
+    BG2 = "#ffffff"
+    FG2 = "#555555"
+    TEXT_SIZE = 30
+
+    def __init__(self, game: Game, pause_callback) -> None:
+        """Initialises the boss key feature
+
+        :param game: The game which to use
+        :type game: Game
+        :param pause_callback: The function to call to pause the game
+        :rtype: None
+        """
+        self.game = game
+        self.canvas = game.canvas
+        self.width, self.height = game.w * Config.SCALE, game.h * Config.SCALE
+        self.shapes = []
+        self.game.inputs.add_keypress_handler(self.on_key)
+        self.hidden = True
+        self.pause_callback = pause_callback
+
+    def on_key(self, event):
+        """Handle key press events
+
+        :param event: The key press event
+        """
+        if event.keysym == self.game.inputs.settings.boss \
+                and self.hidden:
+            self.pause_callback()
+            self.create_shapes()
+            self.hidden = False
+            return True
+
+        if not self.hidden:
+            self.delete_shapes()
+            self.hidden = True
+            return True
+
+        return False
+
+    def create_rectangle(self, x, y, w, h, color):
+        """Create a rectangle object
+
+        :param x: x coordinate
+        :param y: y coordinate
+        :param w: width
+        :param h: height
+        :param color: The colour of the rectangle
+        """
+        self.shapes.append(self.canvas.create_rectangle(
+            x, y, x+w, y+h, fill=color, state="disabled"))
+
+    def write_text(self, x, y, text):
+        """Create a text object
+
+        :param x: x coordiante
+        :param y: y coordinate
+        :param text: The text used for this label
+        """
+        self.shapes.append(self.canvas.create_text(
+            x, y, text=text, fill=BossKey.BG2,
+            font=(f"Helvetica {BossKey.TEXT_SIZE} bold"), state="disabled"))
+
+    def create_shapes(self):
+        """Create all the shapes needed for the calculator"""
+        width = self.width
+        height = self.height
+        padding = width // 50
+
+        num_rows = 5
+        num_cols = 4
+
+        grid_width = width // num_cols
+        grid_height = height // (num_rows+1)
+
+        self.create_rectangle(0, 0, width, height, BossKey.BG)
+        self.create_rectangle(padding,
+                              padding,
+                              width - padding*2,
+                              grid_height-padding*2,
+                              BossKey.FG2)
+
+        symbols = [
+            "(", ")", "%", "AC",
+            "7", "8", "9", "/",
+            "4", "5", "6", "x",
+            "1", "2", "3", "-",
+            "0", ".", "=", "+"
+        ]
+        for row in range(num_rows):
+            for col in range(num_cols):
+                color = BossKey.FG2
+                if row == 0 or col == num_cols - 1:
+                    color = BossKey.FG
+                x = col*grid_width+padding
+                y = row*grid_height+padding+grid_height
+                w = grid_width-padding*2
+                h = grid_height-padding*2
+                self.create_rectangle(x, y, w, h, color)
+
+                offset_x = x + padding + (
+                    grid_width
+                    - padding*2
+                    - BossKey.TEXT_SIZE) // 2
+
+                offset_y = y + padding + (
+                    grid_height-padding * 2
+                    - BossKey.TEXT_SIZE) // 2
+
+                symbol = symbols[col + row*num_cols]
+                self.write_text(offset_x, offset_y, symbol)
+
+    def delete_shapes(self):
+        """Remove all the shapes used for the calculator"""
+        for shape in self.shapes:
+            self.canvas.delete(shape)