Added possibility to sort fetched metadata using the column headers.

src/calibre/gui2/dialogs/fetch_metadata.py

@@ -16,6 +16,8 @@ from calibre.gui2 import error_dialog, NONE, info_dialog, config
 from calibre.gui2.widgets import ProgressIndicator
 from calibre import strftime, force_unicode
 from calibre.customize.ui import get_isbndb_key, set_isbndb_key
+from calibre.utils.icu import sort_key
+from calibre import force_unicode
 
 _hung_fetchers = set([])
 
@@ -72,25 +74,32 @@ class Matches(QAbstractTableModel):
     def summary(self, row):
         return self.matches[row].comments
 
+    def data_as_text(self, book, col):
+        if col == 0 and book.title is not None:
+            return book.title
+        elif col == 1:
+            return ', '.join(book.authors)
+        elif col == 2 and book.author_sort is not None:
+            return book.author_sort
+        elif col == 3 and book.publisher is not None:
+            return book.publisher
+        elif col == 4 and book.isbn is not None:
+            return book.isbn
+        elif col == 5 and hasattr(book.pubdate, 'timetuple'):
+                return strftime('%b %Y', book.pubdate.timetuple())
+        elif col == 6 and book.has_cover:
+            return 'has_cover'
+        elif col == 7 and book.comments is not None:
+            return book.comments
+        else:
+            return ''
+
     def data(self, index, role):
         row, col = index.row(), index.column()
         book = self.matches[row]
         if role == Qt.DisplayRole:
-            res = None
-            if col == 0:
-                res = book.title
-            elif col == 1:
-                res = ', '.join(book.authors)
-            elif col == 2:
-                res = book.author_sort
-            elif col == 3:
-                res = book.publisher
-            elif col == 4:
-                res = book.isbn
-            elif col == 5:
-                if hasattr(book.pubdate, 'timetuple'):
-                    res = strftime('%b %Y', book.pubdate.timetuple())
-            if not res:
+            res = self.data_as_text(book, col)
+            if not (col <= 5 and res):
                 return NONE
             return QVariant(res)
         elif role == Qt.DecorationRole:
@@ -100,6 +109,16 @@ class Matches(QAbstractTableModel):
                 return self.yes_icon
         return NONE
 
+    def sort(self, col, order, reset=True):
+        if not self.matches:
+            return
+        descending = order == Qt.DescendingOrder
+        self.matches.sort(None,
+            lambda x: sort_key(unicode(force_unicode(self.data_as_text(x, col)))),
+            descending)
+        if reset:
+            self.reset()
+
 class FetchMetadata(QDialog, Ui_FetchMetadata):
 
     HANG_TIME = 75 #seconds
@@ -136,6 +155,11 @@ class FetchMetadata(QDialog, Ui_FetchMetadata):
         self.connect(self.matches, SIGNAL('entered(QModelIndex)'),
                      self.show_summary)
         self.matches.setMouseTracking(True)
+        # Enabling sorting and setting a sort column will not change the initial
+        # order of the results, as they are filled in later
+        self.matches.setSortingEnabled(True)
+        QObject.connect(self.matches.horizontalHeader(), SIGNAL('sectionClicked(int)'), self.show_sort_indicator)
+        self.matches.horizontalHeader().setSortIndicatorShown(False)
         self.fetch_metadata()
         self.opt_get_social_metadata.setChecked(config['get_social_metadata'])
         self.opt_overwrite_author_title_metadata.setChecked(config['overwrite_author_title_metadata'])
@@ -243,3 +267,6 @@ class FetchMetadata(QDialog, Ui_FetchMetadata):
     def chosen(self, index):
         self.matches.setCurrentIndex(index)
         self.accept()
+    
+    def show_sort_indicator(self):
+        self.matches.horizontalHeader().setSortIndicatorShown(True)