1) change editing directly on library to use spinbox and value constraints

2) fix tag browser to ignore 0-valued rating custom columns. Also, refactor to save datatype in a map and use this datatype to find the tag formatter
3) fix tag browser and user category editor to display author names with comma instead of vertical bar

src/calibre/gui2/dialogs/tag_categories.py

@@ -39,7 +39,7 @@ class TagCategories(QDialog, Ui_TagCategories):
         category_icons  = [None, QIcon(I('user_profile.svg')), QIcon(I('series.svg')),
                            QIcon(I('publisher.png')), QIcon(I('tags.svg'))]
         category_values = [None,
-                           lambda: [n for (id, n) in self.db.all_authors()],
+                           lambda: [n.replace('|', ',') for (id, n) in self.db.all_authors()],
                            lambda: [n for (id, n) in self.db.all_series()],
                            lambda: [n for (id, n) in self.db.all_publishers()],
                            lambda: self.db.all_tags()

src/calibre/gui2/library.py

@@ -1,7 +1,7 @@
 __license__   = 'GPL v3'
 __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
 
-import os, textwrap, traceback, re, shutil, functools
+import os, textwrap, traceback, re, shutil, functools, sys
 
 from operator import attrgetter
 from math import cos, sin, pi
@@ -10,7 +10,7 @@ from contextlib import closing
 from PyQt4.QtGui import QTableView, QAbstractItemView, QColor, \
                         QPainterPath, QLinearGradient, QBrush, \
                         QPen, QStyle, QPainter, QStyleOptionViewItemV4, \
-                        QIcon, QImage, QMenu, \
+                        QIcon, QImage, QMenu, QSpinBox, QDoubleSpinBox, \
                         QStyledItemDelegate, QCompleter, QIntValidator, \
                         QDoubleValidator, QComboBox
 from PyQt4.QtCore import QAbstractTableModel, QVariant, Qt, pyqtSignal, \
@@ -186,12 +186,18 @@ class CcTextDelegate(QStyledItemDelegate):
         m = index.model()
         col = m.column_map[index.column()]
         typ = m.custom_columns[col]['datatype']
-        editor = EnLineEdit(parent)
         if typ == 'int':
-            editor.setValidator(QIntValidator(parent))
+            editor = QSpinBox(parent)
+            editor.setRange(-100, sys.maxint)
+            editor.setSpecialValueText(_('Undefined'))
+            editor.setSingleStep(1)
         elif typ == 'float':
-            editor.setValidator(QDoubleValidator(parent))
+            editor = QDoubleSpinBox(parent)
+            editor.setSpecialValueText(_('Undefined'))
+            editor.setRange(-100., float(sys.maxint))
+            editor.setDecimals(2)
         else:
+            editor = EnLineEdit(parent)
             complete_items = sorted(list(m.db.all_custom(label=col)))
             completer = QCompleter(complete_items, self)
             completer.setCaseSensitivity(Qt.CaseInsensitive)

src/calibre/gui2/tag_view.py

@@ -195,10 +195,10 @@ class TagTreeItem(object):
 
 class TagsModel(QAbstractItemModel):
     categories_orig = [_('Authors'), _('Series'), _('Formats'), _('Publishers'),
-                       _('Ratings'), _('News'), _('All tags')]
+                       _('Ratings'), _('News'), _('Tags')]
     row_map_orig    = ['author', 'series', 'format', 'publisher', 'rating',
                        'news', 'tag']
-    tags_categories_start= 5
+    tags_categories_start= 7
     search_keys=['search', _('Searches')]
 
     def __init__(self, db, parent=None):
@@ -231,7 +231,11 @@ class TagsModel(QAbstractItemModel):
         self.row_map = []
         self.categories = []
         # strip the icons after the 'standard' categories. We will put them back later
+        if self.tags_categories_start < len(self.row_map_orig):
             self.cat_icon_map = self.cat_icon_map_orig[:self.tags_categories_start-len(self.row_map_orig)]
+        else:
+            self.cat_icon_map = self.cat_icon_map_orig[:]
+
         self.user_categories = dict.copy(config['user_categories'])
         column_map = config['column_map']
 
@@ -256,12 +260,17 @@ class TagsModel(QAbstractItemModel):
             self.categories.append(self.categories_orig[i])
             self.cat_icon_map.append(self.cat_icon_map_orig[i])
 
+        # Clean up the author's tags, getting rid of the '|' characters
+        if data['author'] is not None:
+            for t in data['author']:
+                t.name = t.name.replace('|', ',')
+
         # Now do the user-defined categories. There is a time/space tradeoff here.
         # By converting the tags into a map, we can do the verification in the category
         # loop much faster, at the cost of duplicating the categories lists.
         taglist = {}
         for c in self.row_map:
-            taglist[c] = dict(map(lambda t:(t.name if c != 'author' else t.name.replace('|', ','), t), data[c]))
+            taglist[c] = dict(map(lambda t:(t.name, t), data[c]))
 
         for c in self.user_categories:
             l = []

src/calibre/library/custom_columns.py

@@ -145,9 +145,7 @@ class CustomColumns(object):
             if v['normalized']:
                 tn = 'custom_column_{0}'.format(i)
                 self.tag_browser_categories[tn] = [v['label'], 'value']
-                if v['datatype'] == 'rating':
+                self.tag_browser_datatype[v['label']] = v['datatype']
-                    self.tag_browser_formatters[tn] = lambda x:u'\u2605'*int(round(x/2.))
-
 
     def get_custom(self, idx, label=None, num=None, index_is_id=False):
         if label is not None:

src/calibre/library/database2.py

@@ -128,7 +128,16 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
                 'news'      : ['news', 'name'],
                 'ratings'   : ['rating', 'rating']
         }
-        self.tag_browser_formatters = {'ratings': lambda x:u'\u2605'*int(round(x/2.))}
+        self.tag_browser_datatype = {
+                'tag'       : 'textmult',
+                'series'    : None,
+                'publisher' : 'text',
+                'author'    : 'text',
+                'news'      : None,
+                'rating'    : 'rating',
+        }
+
+        self.tag_browser_formatters = {'rating': lambda x:u'\u2605'*int(round(x/2.))}
 
         self.connect()
         self.is_case_sensitive = not iswindows and not isosx and \
@@ -630,14 +639,16 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
             if icon_map:
                 if category in icon_map:
                     icon = icon_map[category]
-                    tooltip = ''
                 else:
                     icon = icon_map['*custom']
                     tooltip = self.custom_column_label_map[category]['name']
-            formatter = self.tag_browser_formatters.get(tn, lambda x: x)
+            datatype = self.tag_browser_datatype[category]
-            categories[category] = [Tag(formatter(r[1]), count=r[2], id=r[0], icon=icon, tooltip = tooltip)
+            formatter = self.tag_browser_formatters.get(datatype, lambda x: x)
+            categories[category] = [Tag(formatter(r[1]), count=r[2], id=r[0],
+                                        icon=icon, tooltip = tooltip)
                                     for r in data
-                                            if r[2] > 0 and (category != 'rating' or len(formatter(r[1])) > 0)]
+                                        if r[2] > 0 and
+                                          (datatype != 'rating' or len(formatter(r[1])) > 0)]
         categories['format'] = []
         for fmt in self.conn.get('SELECT DISTINCT format FROM data'):
             fmt = fmt[0]