Implemented screen initialization

data/config/mainConfig.json

@@ -1,6 +1,7 @@
 {
   "window": {
     "width": 1280,
-    "height": 720
+    "height": 720,
+    "name": "Adventure Survival"
   }
 }

src/game/Game.py

@@ -2,9 +2,12 @@ import pygame
 import json
 from pathlib import Path
 
+from game.Screen import Screen
+
 
 class Game:
     def __init__(self):
+        self.running = True
         print("Loading configuration...", end=" ")
 
         try:
@@ -24,5 +27,21 @@ class Game:
 
         print("Initializing screen, params: " + str(self.config["window"]) + "...", end=" ")
 
+        # Vertical rotation is unsupported due to UI layout
+        if self.config["window"]["height"] > self.config["window"]["width"]:
+            print("The screen cannot be in a vertical orientation. Exiting...")
+            exit(1)
+
+        self.screen = Screen(self, self.config["window"])
+        print("OK")
+
+        self.spritesList = pygame.sprite.Group()
+
+        self.mainLoop()
+
+    def mainLoop(self):
+        self.spritesList.draw(self.screen.pygameScreen)
+        pygame.display.flip()
+
 
 game = Game()

src/game/Screen.py

@@ -1,4 +1,35 @@
+import math
+import pygame
+
+# minimum UI width
+MARGIN = 300
+
+
 class Screen:
-    def __init__(self):
-        self.map
-        self.ui
+    def __init__(self, gameObject, windowConfig):
+        self.gameObject = gameObject
+        self.winX = windowConfig["width"]
+        self.winY = windowConfig["height"]
+        pygame.display.set_caption(windowConfig["name"])
+        self.pygameScreen = pygame.display.set_mode((self.winX, self.winY))
+
+        # map is a square inside the screen
+        self.mapSize = self.calculateMapDimensions()
+
+        # mapCoord is a top leftmost pixel
+        self.mapCoord = math.floor((self.winX - self.mapSize) / 2)
+
+        # draw a white rect to resemble map
+        pygame.draw.rect(self.pygameScreen, (255, 255, 255), [self.mapCoord, 0, self.mapSize, self.mapSize])
+
+    def calculateMapDimensions(self):
+        result = 0
+        expectedSize = self.winY
+
+        # when there's not enough space for the UI on the sides
+        if self.winX - expectedSize < MARGIN:
+            result = expectedSize - (MARGIN - (self.winX - expectedSize))
+        else:
+            result = expectedSize
+
+        return result