scaling as class

1 files changed, 36 insertions, 0 deletions

diff --git a/src/sliceitoff/display/scaling.py b/src/sliceitoff/display/scaling.py
new file mode 100644
index 0000000..6be00da
--- /dev/null
+++ b/src/sliceitoff/display/scaling.py
@@ -0,0 +1,36 @@
+import pygame
+
+from .static import INTERNAL_WIDTH, INTERNAL_HEIGHT
+
+class Scaling():
+    factor = 0.02
+    left = 0
+    top = 0
+    
+    @staticmethod
+    def area_to_rect(area: tuple) -> pygame.Rect:
+        """ converts area coordinates to pygame.Rect"""
+        return pygame.Rect(
+                area[0] * __class__.factor + __class__.left,
+                area[1] * __class__.factor + __class__.top,
+                area[2] * __class__.factor,
+                area[3] * __class__.factor)
+
+    @staticmethod
+    def scale_coordinates(coords: tuple ) -> tuple:
+        return (
+                coords[0] * __class__.factor + __class__.left,
+                coords[1] * __class__.factor + __class__.top)
+
+    @staticmethod
+    def update_scaling(size: tuple) -> None:
+        if size[0] / size[1] <= INTERNAL_WIDTH / INTERNAL_HEIGHT:
+            __class__.factor = size[0] / INTERNAL_WIDTH
+            __class__.left = 0
+            __class__.top = (size[1] - INTERNAL_HEIGHT * __class__.factor) // 2
+        else:
+            __class__.factor = size[1] / INTERNAL_HEIGHT
+            __class__.left = (size[0] - INTERNAL_WIDTH * __class__.factor) // 2
+            __class__.top = 0
+
+    
\ No newline at end of file