prevent scroll

src/textual/app.py

@@ -899,7 +899,7 @@ class App(Generic[ReturnType], DOMNode):
         self.log.system(f"{self.screen} is active")
         return previous_screen
 
-    def set_focus(self, widget: Widget | None, scroll_visible: bool = False) -> None:
+    def set_focus(self, widget: Widget | None, scroll_visible: bool = True) -> None:
         """Focus (or unfocus) a widget. A focused widget will receive key events first.
 
         Args:

src/textual/screen.py

@@ -300,8 +300,11 @@ class Screen(Widget):
             except errors.NoWidget:
                 self.app.set_focus(None)
             else:
-                if isinstance(event, events.MouseDown) and widget.can_focus:
+                if isinstance(event, events.MouseUp) and widget.can_focus:
-                    self.app.set_focus(widget)
+                    if self.app.focused is not widget:
+                        self.app.set_focus(widget)
+                        event.stop()
+                        return
                 event.style = self.get_style_at(event.screen_x, event.screen_y)
                 if widget is self:
                     event.set_forwarded()

src/textual/widget.py

@@ -1435,9 +1435,14 @@ class Widget(DOMNode):
                     self._layout_required = False
                     screen.post_message_no_wait(messages.Layout(self))
 
-    def focus(self) -> None:
+    def focus(self, scroll_visible: bool = True) -> None:
-        """Give input focus to this widget."""
+        """Give focus to this widget.
-        self.app.set_focus(self)
+
+        Args:
+            scroll_visible (bool, optional): Scroll parent to make this widget
+                visible. Defaults to True.
+        """
+        self.app.set_focus(self, scroll_visible=scroll_visible)
 
     def capture_mouse(self, capture: bool = True) -> None:
         """Capture (or release) the mouse.