Umstellung auf Customtkinter.

.venv/Lib/site-packages/darkdetect/_linux_detect.py

@@ -0,0 +1,45 @@
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2019 Alberto Sottile, Eric Larson
+#
+#  Distributed under the terms of the 3-clause BSD License.
+#-----------------------------------------------------------------------------
+
+import subprocess
+
+def theme():
+    try:
+        #Using the freedesktop specifications for checking dark mode
+        out = subprocess.run(
+            ['gsettings', 'get', 'org.gnome.desktop.interface', 'color-scheme'],
+            capture_output=True)
+        stdout = out.stdout.decode()
+        #If not found then trying older gtk-theme method
+        if len(stdout)<1:
+            out = subprocess.run(
+                ['gsettings', 'get', 'org.gnome.desktop.interface', 'gtk-theme'],
+                capture_output=True)
+            stdout = out.stdout.decode()
+    except Exception:
+        return 'Light'
+    # we have a string, now remove start and end quote
+    theme = stdout.lower().strip()[1:-1]
+    if '-dark' in theme.lower():
+        return 'Dark'
+    else:
+        return 'Light'
+
+def isDark():
+    return theme() == 'Dark'
+
+def isLight():
+    return theme() == 'Light'
+
+# def listener(callback: typing.Callable[[str], None]) -> None:
+def listener(callback):
+    with subprocess.Popen(
+        ('gsettings', 'monitor', 'org.gnome.desktop.interface', 'gtk-theme'),
+        stdout=subprocess.PIPE,
+        universal_newlines=True,
+    ) as p:
+        for line in p.stdout:
+            callback('Dark' if '-dark' in line.strip().removeprefix("gtk-theme: '").removesuffix("'").lower() else 'Light')