gui/fix division by zero error, when container size ==0

Author: eruvanos

arcade/gui/widgets/layout.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import warnings
 from dataclasses import dataclass
 from typing import Dict, Iterable, List, Optional, Tuple, TypeVar
 
@@ -900,6 +901,13 @@ def _box_axis_algorithm(constraints: list[_C], container_size: float) -> List[fl
     Returns:
         List of tuples with the sizes of each element
     """
+
+    # if there is no space, return the min value of each constraint
+    # this will cause a overflow, so we give a warning
+    if container_size <= 0:
+        warnings.warn("Container size is 0, cannot calculate sizes for children.")
+        return [c.min for c in constraints]
+
     # adjust hint value based on min and max values
     for c in constraints:
         c.hint = max(c.min / container_size, c.hint)

tests/unit/gui/test_layouting_box_main_algorithm.py

@@ -31,6 +31,21 @@ def test_shw_smaller_1(window):
     assert sizes == [10, 10, 50]
 
 
+def test_container_size_zero(window):
+    # GIVEN
+    entries = [
+        _C(hint=0.1, min=50, max=None),
+        _C(hint=0.1, min=50, max=None),
+        _C(hint=0.5, min=50, max=None),
+    ]
+
+    # WHEN
+    sizes = _box_axis_algorithm(entries, 0)
+
+    # THEN
+    assert sizes == [50, 50, 50]
+
+
 def test_complex_example_with_max_value():
     # GIVEN
     entries = [