Refresh cache on metadata edits

src/calibre/gui2/library.py

@@ -124,6 +124,9 @@ class BooksModel(QAbstractTableModel):
     def refresh_ids(self, ids, current_row=-1):
         rows = self.db.refresh_ids(ids)
         for row in rows:
+            if self.cover_cache:
+                id = self.db.id(row)
+                self.cover_cache.refresh(id)
             if row == current_row:
                 self.emit(SIGNAL('new_bookdisplay_data(PyQt_PyObject)'),
                           self.get_book_display_info(row))

src/calibre/library/database2.py

@@ -132,6 +132,16 @@ class CoverCache(QThread):
         self.cache = {}
         self.cache_lock.unlock()
 
+    def refresh(self, ids):
+        self.cache_lock.lockForWrite()
+        for id in ids:
+            self.cache.pop(id, None)
+        self.cache_lock.unlock()
+        self.load_queue_lock.lockForWrite()
+        for id in ids:
+            self.load_queue.append_left(id)
+        self.load_queue_lock.unlock()
+    
 class Concatenate(object):
     '''String concatenation aggregator for sqlite'''
     def __init__(self, sep=','):