Merge pull request #1799 from Textualize/datatable-fixed-column-cursor

DataTable - allow the cursor to enter fixed columns

CHANGELOG.md

@@ -66,6 +66,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - `DOMNode.tree` now displays simple DOM structure only https://github.com/Textualize/textual/pull/1778
 - `App.install_screen` now returns None rather than AwaitMount https://github.com/Textualize/textual/pull/1778
 - `DOMNode.children` is now a simple sequence, the NodesList is exposed as `DOMNode._nodes` https://github.com/Textualize/textual/pull/1778
+- `DataTable` cursor can now enter fixed columns https://github.com/Textualize/textual/pull/1799
 
 ### Fixed
 

src/textual/widgets/_data_table.py

@@ -877,7 +877,7 @@ class DataTable(ScrollView, Generic[CellType], can_focus=True):
         """Clamp a coordinate such that it falls within the boundaries of the table."""
         row, column = coordinate
         row = clamp(row, 0, self.row_count - 1)
-        column = clamp(column, self.fixed_columns, len(self.columns) - 1)
+        column = clamp(column, 0, len(self.columns) - 1)
         return Coordinate(row, column)
 
     def watch_cursor_type(self, old: str, new: str) -> None: