Web-based check-in interface (#1985)

src/pretix/control/forms/event.py

@@ -1134,6 +1134,13 @@ class TicketSettingsForm(SettingsForm):
 
 
 class CommentForm(I18nModelForm):
+
+    def __init__(self, *args, **kwargs):
+        self.readonly = kwargs.pop('readonly')
+        super().__init__(*args, **kwargs)
+        if self.readonly:
+            self.fields['comment'].widget.attrs['readonly'] = 'readonly'
+
     class Meta:
         model = Event
         fields = ['comment']