Remove App.dark from App and docs examples

docs/examples/events/on_decorator01.py

@@ -16,7 +16,9 @@ def on_button_pressed(self, event: Button.Pressed) -> None:  # (1)!
         if event.button.id == "bell":
             self.bell()
         elif event.button.has_class("toggle", "dark"):
-            self.dark = not self.dark
+            self.theme = (
+                "textual-dark" if self.theme == "textual-light" else "textual-light"
+            )
         elif event.button.id == "quit":
             self.exit()
 

docs/examples/events/on_decorator02.py

@@ -20,7 +20,9 @@ def play_bell(self):
     @on(Button.Pressed, ".toggle.dark")  # (2)!
     def toggle_dark(self):
         """Called when the 'toggle dark' button is pressed."""
-        self.dark = not self.dark
+        self.theme = (
+            "textual-dark" if self.theme == "textual-light" else "textual-light"
+        )
 
     @on(Button.Pressed, "#quit")  # (3)!
     def quit(self):

docs/examples/getting_started/console.py

@@ -10,7 +10,6 @@
 
 class ConsoleApp(App):
     def compose(self):
-        self.dark = True
         yield Static(DevConsoleHeader())
 
 

docs/examples/tutorial/stopwatch.py

@@ -99,7 +99,9 @@ def action_remove_stopwatch(self) -> None:
 
     def action_toggle_dark(self) -> None:
         """An action to toggle dark mode."""
-        self.dark = not self.dark
+        self.theme = (
+            "textual-dark" if self.theme == "textual-light" else "textual-light"
+        )
 
 
 if __name__ == "__main__":

docs/examples/tutorial/stopwatch01.py

@@ -1,5 +1,5 @@
 from textual.app import App, ComposeResult
-from textual.widgets import Header, Footer
+from textual.widgets import Footer, Header
 
 
 class StopwatchApp(App):
@@ -14,7 +14,9 @@ def compose(self) -> ComposeResult:
 
     def action_toggle_dark(self) -> None:
         """An action to toggle dark mode."""
-        self.dark = not self.dark
+        self.theme = (
+            "textual-dark" if self.theme == "textual-light" else "textual-light"
+        )
 
 
 if __name__ == "__main__":

docs/examples/tutorial/stopwatch02.py

@@ -31,7 +31,9 @@ def compose(self) -> ComposeResult:
 
     def action_toggle_dark(self) -> None:
         """An action to toggle dark mode."""
-        self.dark = not self.dark
+        self.theme = (
+            "textual-dark" if self.theme == "textual-light" else "textual-light"
+        )
 
 
 if __name__ == "__main__":

docs/examples/tutorial/stopwatch03.py

@@ -32,7 +32,9 @@ def compose(self) -> ComposeResult:
 
     def action_toggle_dark(self) -> None:
         """An action to toggle dark mode."""
-        self.dark = not self.dark
+        self.theme = (
+            "textual-dark" if self.theme == "textual-light" else "textual-light"
+        )
 
 
 if __name__ == "__main__":

docs/examples/tutorial/stopwatch04.py

@@ -39,7 +39,9 @@ def compose(self) -> ComposeResult:
 
     def action_toggle_dark(self) -> None:
         """An action to toggle dark mode."""
-        self.dark = not self.dark
+        self.theme = (
+            "textual-dark" if self.theme == "textual-light" else "textual-light"
+        )
 
 
 if __name__ == "__main__":

docs/examples/tutorial/stopwatch05.py

@@ -59,7 +59,9 @@ def compose(self) -> ComposeResult:
 
     def action_toggle_dark(self) -> None:
         """An action to toggle dark mode."""
-        self.dark = not self.dark
+        self.theme = (
+            "textual-dark" if self.theme == "textual-light" else "textual-light"
+        )
 
 
 if __name__ == "__main__":

docs/examples/tutorial/stopwatch06.py

@@ -82,7 +82,9 @@ def compose(self) -> ComposeResult:
 
     def action_toggle_dark(self) -> None:
         """An action to toggle dark mode."""
-        self.dark = not self.dark
+        self.theme = (
+            "textual-dark" if self.theme == "textual-light" else "textual-light"
+        )
 
 
 if __name__ == "__main__":

src/textual/app.py

@@ -508,16 +508,6 @@ class MyApp(App[None]):
     sub_title: Reactive[str] = Reactive("", compute=False)
     """The app's sub-title, combined with [`title`][textual.app.App.title] in the header."""
 
-    dark: Reactive[bool] = Reactive(True, compute=False)
-    """Use a dark theme if `True`, otherwise use a light theme.
-
-    Modify this attribute to switch between light and dark themes.
-
-    Example:
-        ```python
-        self.app.dark = not self.app.dark  # Toggle dark mode
-        ```
-    """
     app_focus = Reactive(True, compute=False)
     """Indicates if the app has focus.
 
@@ -1578,10 +1568,6 @@ async def run_callback() -> CallThreadReturnType:
         result = future.result()
         return result
 
-    def action_toggle_dark(self) -> None:
-        """An [action](/guide/actions) to toggle dark mode."""
-        self.dark = not self.dark
-
     def action_change_theme(self) -> None:
         """An [action](/guide/actions) to change the current theme."""
         self.app.push_screen(

src/textual/demo.py

@@ -176,17 +176,17 @@ class Title(Static):
 
 class DarkSwitch(Horizontal):
     def compose(self) -> ComposeResult:
-        yield Switch(value=self.app.dark)
+        yield Switch(value=self.app.theme == "textual-dark")
         yield Static("Dark mode toggle", classes="label")
 
     def on_mount(self) -> None:
         self.watch(self.app, "dark", self.on_dark_change, init=False)
 
     def on_dark_change(self) -> None:
-        self.query_one(Switch).value = self.app.dark
+        self.query_one(Switch).value = self.app.theme == "textual-dark"
 
     def on_switch_changed(self, event: Switch.Changed) -> None:
-        self.app.dark = event.value
+        self.app.theme = "textual-dark" if event.value else "textual-light"
 
 
 class Welcome(Container):