From: Jakob Cornell <jakob+gpg@jcornell.net>
Date: Sun, 29 Dec 2024 21:15:47 +0000 (-0600)
Subject: Force TkAgg Matplotlib backend on macOS
X-Git-Url: https://jcornell.net/gitweb/gitweb.cgi?a=commitdiff_plain;h=f9f9ed833e2dd4613e5d2d317865fa8e0b95ed3e;p=tutoring-tool.git

Force TkAgg Matplotlib backend on macOS

This fixes a crash caused by closing a generated plot window in the app.
---

diff --git a/main.py b/main.py
index 5128bc6..edf7f22 100644
--- a/main.py
+++ b/main.py
@@ -800,9 +800,10 @@ class AutoJsonStorageMgr:
 			json.dump(data, f)
 
 
-# This seems to be necessary for Pyinstaller builds; not sure why.
+# The "macosx" backend is chosen by default on macOS and doesn't seem to play well with Tk.
+# https://discuss.python.org/t/tkinter-pyplot-crashes-appkit-on-macos/75590
 if sys.platform == "darwin":
-	matplotlib.use("macosx")
+	matplotlib.use("TkAgg")
 
 model = MainModel(AutoJsonStorageMgr('data'), AutoJsonStorageMgr('state'))
 view = MainView()