From 3ce04c814a900fa7ee2d2835836832f80778b61c Mon Sep 17 00:00:00 2001
From: Dave Pearson <davep@davep.org>
Date: Tue, 23 May 2023 10:20:00 +0100
Subject: [PATCH] Add a method of selecting all selection options

---
 src/textual/widgets/_selection_list.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/textual/widgets/_selection_list.py b/src/textual/widgets/_selection_list.py
index 018a8fdfd..846d0efe0 100644
--- a/src/textual/widgets/_selection_list.py
+++ b/src/textual/widgets/_selection_list.py
@@ -272,6 +272,10 @@ class SelectionList(Generic[SelectionType], OptionList):
         self.refresh()
         return self
 
+    def select_all(self) -> Self:
+        """Select all items."""
+        return self._apply_to_all(self._select)
+
     def _deselect(self, value: SelectionType) -> None:
         """Mark the given selection as not selected.