Gui/3.x fixes (#2600)

* gui/fix color picker example added buttons to multiple layouts
* gui/fix with_background accepts iterables as color
* gui/fix division by zero error, when container size is 0
* update release notes

Author: eruvanos

CHANGELOG.md

@@ -6,6 +6,18 @@ Arcade [PyPi Release History](https://pypi.org/project/arcade/#history) page.
 
 ## Version 3.0.1 (unreleased)
 
+### Improvements
+
+- `UIWidget.with_background` now accepts a tuple for color
+
+### Bug Fixes
+
+- Fixed division error in box layout algorithm
+- Fix example added buttons to multiple layouts
+
+
+## Version 3.0.1
+
 ### Bug Fixes
 
 - Fixed blurriness in `UIWidget` text during interaction

arcade/examples/gui/5_uicolor_picker.py

@@ -144,12 +144,10 @@ def __init__(self):
             )
         )
         for i, (name, color) in enumerate(self.colors.items()):
-            button = self.root.add(
-                ColorButton(
-                    color_name=name,
-                    color=color,
-                    size_hint=(1, 1),
-                )
+            button = ColorButton(
+                color_name=name,
+                color=color,
+                size_hint=(1, 1),
             )
             self.grid.add(button, row=i // 5, column=i % 5)
 

arcade/gui/widgets/__init__.py

@@ -461,6 +461,9 @@ def with_background(
             self
         """
         if color is not ...:
+            if color is not None:
+                color = Color.from_iterable(color)
+
             self._bg_color = color
 
         if texture is not ...:

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 = [