Add ability to scroll Footer without holding shift

Author: darrenburns

src/textual/events.py

@@ -16,10 +16,10 @@
 from dataclasses import dataclass
 from pathlib import Path
 from typing import TYPE_CHECKING, Type, TypeVar
-from typing_extensions import Self
 
 import rich.repr
 from rich.style import Style
+from typing_extensions import Self
 
 from textual._types import CallbackType
 from textual.geometry import Offset, Size
@@ -539,7 +539,7 @@ class MouseScrollDown(MouseEvent, bubble=True, verbose=True):
     """Sent when the mouse wheel is scrolled *down*.
 
     - [X] Bubbles
-    - [ ] Verbose
+    - [X] Verbose
     """
 
 
@@ -548,7 +548,7 @@ class MouseScrollUp(MouseEvent, bubble=True, verbose=True):
     """Sent when the mouse wheel is scrolled *up*.
 
     - [X] Bubbles
-    - [ ] Verbose
+    - [X] Verbose
     """
 
 

src/textual/widgets/_footer.py

@@ -6,6 +6,7 @@
 import rich.repr
 from rich.text import Text
 
+from textual import events
 from textual.app import ComposeResult
 from textual.binding import Binding
 from textual.containers import ScrollableContainer
@@ -249,6 +250,20 @@ async def bindings_changed(self, screen: Screen) -> None:
         if self.is_attached and screen is self.screen:
             await self.recompose()
 
+    def _on_mouse_scroll_down(self, event: events.MouseScrollDown) -> None:
+        if self.allow_horizontal_scroll:
+            self._clear_anchor()
+            if self._scroll_right_for_pointer(animate=False):
+                event.stop()
+                event.prevent_default()
+
+    def _on_mouse_scroll_up(self, event: events.MouseScrollUp) -> None:
+        if self.allow_horizontal_scroll:
+            self._clear_anchor()
+            if self._scroll_left_for_pointer(animate=False):
+                event.stop()
+                event.prevent_default()
+
     def on_mount(self) -> None:
         self.call_next(self.bindings_changed, self.screen)
         self.screen.bindings_updated_signal.subscribe(self, self.bindings_changed)