callback invoke

docs/examples/widgets/custom.py

@@ -1,6 +1,6 @@
+from rich.console import RenderableType
 from rich.panel import Panel
 
-from textual import events
 from textual.app import App
 from textual.reactive import Reactive
 from textual.widget import Widget
@@ -8,22 +8,22 @@ from textual.widget import Widget
 
 class Hover(Widget):
 
-    mouse_over: Reactive[bool] = Reactive(False)
+    mouse_over = Reactive(False)
 
-    def render(self) -> Panel:
+    def render(self) -> RenderableType:
         return Panel("Hello [b]World[/b]", style=("on red" if self.mouse_over else ""))
 
-    async def on_enter(self, event: events.Enter) -> None:
+    def on_enter(self) -> None:
         self.mouse_over = True
 
-    async def on_leave(self, event: events.Leave) -> None:
+    def on_leave(self) -> None:
         self.mouse_over = False
 
 
 class HoverApp(App):
     """Demonstrates smooth animation"""
 
-    async def on_mount(self, event: events.Mount) -> None:
+    async def on_mount(self) -> None:
         """Build layout here."""
 
         hovers = (Hover() for _ in range(10))