Fix scrollbar region calculation to support zero-thickness scrollbars

Textualize · Oct 9, 2023 · 2e4e9f3 · 2e4e9f3
1 parent b2806fa
commit 2e4e9f3
Showing 1 changed file with 5 additions and 5 deletions.
diff --git a/src/textual/widget.py b/src/textual/widget.py
@@ -1220,7 +1220,7 @@ def vertical_scrollbar(self) -> ScrollBar:
 
     @property
     def horizontal_scrollbar(self) -> ScrollBar:
-        """The a horizontal scrollbar.
+        """The horizontal scrollbar.
 
         Note:
             This will *create* a scrollbar if one doesn't exist.
@@ -2701,8 +2701,8 @@ def _arrange_scrollbars(self, region: Region) -> Iterable[tuple[Widget, Region]]
                 horizontal_scrollbar_region,
                 scrollbar_corner_gap,
             ) = region.split(
-                -scrollbar_size_vertical,
-                -scrollbar_size_horizontal,
+                region.width - scrollbar_size_vertical,
+                region.height - scrollbar_size_horizontal,
             )
             if scrollbar_corner_gap:
                 yield self.scrollbar_corner, scrollbar_corner_gap
@@ -2719,7 +2719,7 @@ def _arrange_scrollbars(self, region: Region) -> Iterable[tuple[Widget, Region]]
 
         elif show_vertical_scrollbar:
             window_region, scrollbar_region = region.split_vertical(
-                -scrollbar_size_vertical
+                region.width - scrollbar_size_vertical
             )
             if scrollbar_region:
                 scrollbar = self.vertical_scrollbar
@@ -2728,7 +2728,7 @@ def _arrange_scrollbars(self, region: Region) -> Iterable[tuple[Widget, Region]]
                 yield scrollbar, scrollbar_region
         elif show_horizontal_scrollbar:
             window_region, scrollbar_region = region.split_horizontal(
-                -scrollbar_size_horizontal
+                region.height - scrollbar_size_horizontal
             )
             if scrollbar_region:
                 scrollbar = self.horizontal_scrollbar