From b599fad86579638cbb30f6b47e29cfc26375f547 Mon Sep 17 00:00:00 2001
From: Will McGugan <willmcgugan@gmail.com>
Date: Mon, 20 Sep 2021 15:07:58 +0100
Subject: [PATCH] Calculator fix

---
 examples/calculator.py | 2 +-
 src/textual/events.py  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/examples/calculator.py b/examples/calculator.py
index 3457eb7eb..7e514adc6 100644
--- a/examples/calculator.py
+++ b/examples/calculator.py
@@ -185,7 +185,7 @@ class Calculator(GridView):
             self.display = self.value = str(Decimal(self.value or "0") / Decimal(100))
         elif button_name == ".":
             if "." not in self.value:
-                self.display = self.value = self.value + "."
+                self.display = self.value = (self.value or "0") + "."
         elif button_name == "AC":
             self.value = ""
             self.left = self.right = Decimal(0)
diff --git a/src/textual/events.py b/src/textual/events.py
index 00aace8de..02dafafcf 100644
--- a/src/textual/events.py
+++ b/src/textual/events.py
@@ -333,7 +333,7 @@ class MouseUp(MouseEvent, bubble=True):
     pass
 
 
-class MouseScrollDown(InputEvent, bubble=True):
+class MouseScrollDown(InputEvent, verbosity=3, bubble=True):
     __slots__ = ["x", "y"]
 
     def __init__(self, sender: MessageTarget, x: int, y: int) -> None: