Add control to TabbedContent message.

CHANGELOG.md

@@ -21,12 +21,24 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Markdown document sub-widgets now reference the container document
 - Table of contents of a markdown document now references the document
 - Added the `control` property to messages
-  - `OptionList.OptionHighlighted` and `OptionList.OptionSelected`
-  - `Tree.NodeSelected`, `Tree.NodeHighlighted`, `Tree.NodeExpanded`, and `Tree.NodeCollapsed`
   - `DirectoryTree.FileSelected`
-  - `ListView.Highlighted` and `ListView.Selected`
-  - `Markdown.TableOfContentsUpdated`, `Markdown.TableOfContentsSelected`, and `Markdown.LinkClicked`
+  - `ListView`
+    - `Highlighted`
+    - `Selected`
+  - `Markdown`
+    - `TableOfContentsUpdated`
+    - `TableOfContentsSelected`
+    - `LinkClicked`
+  - `OptionList`
+    - `OptionHighlighted`
+    - `OptionSelected`
   - `RadioSet.Changed`
+  - `TabContent.TabActivated`
+  - `Tree`
+    - `NodeSelected`
+    - `NodeHighlighted`
+    - `NodeExpanded`
+    - `NodeCollapsed`
 
 ## [0.23.0] - 2023-05-03
 

src/textual/widgets/_tabbed_content.py

@@ -96,9 +96,20 @@ class TabbedContent(Widget):
                 tab: The Tab widget that was selected (contains the tab label).
             """
             self.tabbed_content = tabbed_content
+            """The `TabbedContent` widget that contains the tab activated."""
             self.tab = tab
+            """The `Tab` widget that was selected (contains the tab label)."""
             super().__init__()
 
+        @property
+        def control(self) -> TabbedContent:
+            """The `TabbedContent` widget that contains the tab activated.
+
+            This is an alias for [`TabActivated.tabbed_content`][textual.widgets.TabbedContent.TabActivated.tabbed_content]
+            and is used by the [`on`][textual.on] decorator.
+            """
+            return self.tabbed_content
+
         def __rich_repr__(self) -> Result:
             yield self.tabbed_content
             yield self.tab