From b5ae66ee0658aff387cf93d14ba119d54054732f Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 10 Aug 2021 16:49:23 +0530
Subject: [PATCH] Added a book_edited event

---
 src/calibre/db/cache.py     | 1 +
 src/calibre/db/listeners.py | 3 +++
 src/calibre/gui2/ui.py      | 1 +
 3 files changed, 5 insertions(+)

diff --git a/src/calibre/db/cache.py b/src/calibre/db/cache.py
index 0434d923f3..a48a910bcb 100644
--- a/src/calibre/db/cache.py
+++ b/src/calibre/db/cache.py
@@ -137,6 +137,7 @@ class Cache(object):
     All table reading/sorting/searching/caching logic is re-implemented. This
     was necessary for maximum performance and flexibility.
     '''
+    EventType = EventType
 
     def __init__(self, backend):
         self.backend = backend
diff --git a/src/calibre/db/listeners.py b/src/calibre/db/listeners.py
index b772842f8f..9857b15ae0 100644
--- a/src/calibre/db/listeners.py
+++ b/src/calibre/db/listeners.py
@@ -38,6 +38,9 @@ class EventType(Enum):
     #: Arguments: (field_name, affected book ids, ids of removed items)
     items_removed = auto()
 
+    #: When a book format is edited, with arguments: (book_id, fmt)
+    book_edited = auto()
+
 
 class EventDispatcher:
 
diff --git a/src/calibre/gui2/ui.py b/src/calibre/gui2/ui.py
index 5c1218e615..e1a44b7e43 100644
--- a/src/calibre/gui2/ui.py
+++ b/src/calibre/gui2/ui.py
@@ -793,6 +793,7 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin,  # {{{
                     db.format_metadata(book_id, fmt, allow_cache=False, update_db=True)
                     db.update_last_modified((book_id,))
                     m.refresh_ids((book_id,))
+                    db.event_dispatcher(db.EventType.book_edited, book_id, fmt)
             except Exception:
                 import traceback
                 traceback.print_exc()