fix label cut off text caused by multiline and kerning

CHANGELOG.md

@@ -7,6 +7,8 @@ Arcade [PyPi Release History](https://pypi.org/project/arcade/#history) page.
 
 - Fixed an issue causing a crash when closing the window
 - Added `Window.close` (bool) attribute indicating if the window is closed
+- GUI
+  - Fix `UILabel` with enabled multiline sometimes cut off text
 
 ## Version 3.2
 

arcade/gui/widgets/text.py

@@ -126,8 +126,8 @@ def __init__(
         self._strong_background = True
 
         if adaptive_multiline:
-            # +1 is required to prevent line wrap
-            width = self._label.content_width + 1
+            # +1 is required to prevent line wrap, +1 is required to prevent issues with kerning
+            width = self._label.content_width + 2
 
         super().__init__(
             x=x,
@@ -242,7 +242,8 @@ def _update_label(self):
 
     def _update_size_hint_min(self):
         """Update the minimum size hint based on the label content size."""
-        min_width = self._label.content_width + 1  # +1 required to prevent line wrap
+        # +1 is required to prevent line wrap, +1 is required to prevent issues with kerning
+        min_width = self._label.content_width + 2
         min_width += self._padding_left + self._padding_right + 2 * self._border_width
 
         min_height = self._label.content_height

tests/unit/gui/test_uilabel.py

@@ -1,6 +1,5 @@
 from unittest.mock import Mock
 
-import pytest
 from pyglet.math import Vec2
 
 from arcade.gui import UILabel
@@ -192,7 +191,7 @@ def test_integration_with_layout_fit_to_content(ui):
     ui.execute_layout()
 
     # auto size should fit the text
-    assert label.rect.width == 44
+    assert label.rect.width == 45
     assert label.rect.height == 12
 
     # even when text changed
@@ -221,7 +220,7 @@ def test_fit_content_overrides_width(ui):
 
     label.fit_content()
 
-    assert label.rect.width == 44
+    assert label.rect.width == 45
     assert label.rect.height == 12