Add a preference in Preferences->Look & Feel to hide the row numbers in the main book list. Fixes #1643313 [Enhancement: Hide book number (GUI) column](https://bugs.launchpad.net/calibre/+bug/1643313)

src/calibre/gui2/__init__.py

@@ -30,7 +30,7 @@ except AttributeError:
 
 # Setup gprefs {{{
 gprefs = JSONConfig('gui')
-defs = gprefs.defaults
+
 
 native_menubar_defaults = {
     'action-layout-menubar': (
@@ -45,6 +45,9 @@ native_menubar_defaults = {
         )
 }
 
+
+def create_defs():
+    defs = gprefs.defaults
     if isosx:
         defs['action-layout-menubar'] = native_menubar_defaults['action-layout-menubar']
         defs['action-layout-menubar-device'] = native_menubar_defaults['action-layout-menubar-device']
@@ -145,7 +148,11 @@ defs['emblem_size'] = 32
     defs['emblem_position'] = 'left'
     defs['metadata_diff_mark_rejected'] = False
     defs['tag_browser_show_counts'] = True
-del defs
+    defs['row_numbers_in_book_list'] = True
+
+
+create_defs()
+del create_defs
 # }}}
 
 UNDEFINED_QDATETIME = QDateTime(UNDEFINED_DATE)
@@ -256,7 +263,9 @@ def _config():  # {{{
     c.add_opt
     return ConfigProxy(c)
 
+
 config = _config()
+
 # }}}
 
 QSettings.setPath(QSettings.IniFormat, QSettings.UserScope, config_dir)
@@ -300,6 +309,7 @@ def get_screen_dpi():
     d = QApplication.desktop()
     return (d.logicalDpiX(), d.logicalDpiY())
 
+
 _is_widescreen = None
 
 
@@ -580,6 +590,7 @@ class FileIconProvider(QFileIconProvider):
             return self.icons['default']
         return QFileIconProvider.icon(self, arg)
 
+
 _file_icon_provider = None
 
 
@@ -706,6 +717,7 @@ class FileDialog(QObject):
             return tuple(os.path.abspath(unicode(i)) for i in self.fd.selectedFiles())
         return tuple(self.selected_files)
 
+
 has_windows_file_dialog_helper = False
 if iswindows and 'CALIBRE_NO_NATIVE_FILEDIALOGS' not in os.environ:
     from calibre.gui2.win_file_dialogs import is_ok as has_windows_file_dialog_helper
@@ -814,6 +826,7 @@ def decouple(prefix):
     from calibre.gui2.widgets import history
     history.decouple(prefix)
 
+
 _gui_prefs = gprefs
 
 
@@ -1149,6 +1162,7 @@ class Application(QApplication):
             return
         self.shutdown_signal_received.emit()
 
+
 _store_app = None
 
 
@@ -1188,6 +1202,8 @@ def sanitize_env_vars():
                     os.environ[var] = orig
                 elif var in os.environ:
                     del os.environ[var]
+
+
 SanitizeLibraryPath = sanitize_env_vars  # For old plugins
 
 
@@ -1223,6 +1239,7 @@ def open_local_file(path):
         url = QUrl.fromLocalFile(path)
         open_url(url)
 
+
 _ea_lock = Lock()
 
 
@@ -1284,6 +1301,7 @@ def is_gui_thread():
     global gui_thread
     return gui_thread is QThread.currentThread()
 
+
 _rating_font = 'Arial Unicode MS' if iswindows else 'sans-serif'
 
 
@@ -1370,6 +1388,7 @@ def build_forms(srcdir, info=None, summary=False, check_for_migration=False):
     if force_compile:
         gprefs.set('migrated_forms_to_qt5', True)
 
+
 _df = os.environ.get('CALIBRE_DEVELOP_FROM', None)
 if _df and os.path.exists(_df):
     build_forms(_df, check_for_migration=True)

src/calibre/gui2/library/views.py

@@ -284,6 +284,7 @@ class BooksView(QTableView):  # {{{
         self._model.about_to_be_sorted.connect(self.about_to_be_sorted)
         self._model.sorting_done.connect(self.sorting_done,
                 type=Qt.QueuedConnection)
+        self.set_row_header_visibility()
 
     # Column Header Context Menu {{{
     def column_header_context_handler(self, action=None, column=None):
@@ -762,6 +763,11 @@ class BooksView(QTableView):  # {{{
             self.model().set_row_decoration(current_marked)
             self.row_header.headerDataChanged(Qt.Vertical, 0, self.row_header.count()-1)
             self.row_header.geometriesChanged.emit()
+            self.set_row_header_visibility()
+
+    def set_row_header_visibility(self):
+        visible = self.model().row_decoration is not None or gprefs['row_numbers_in_book_list']
+        self.row_header.setVisible(visible)
 
     def database_changed(self, db):
         db.data.add_marked_listener(self.marked_changed_listener)
@@ -1140,6 +1146,10 @@ class DeviceBooksView(BooksView):  # {{{
             self.setItemDelegateForColumn(i, TextDelegate(self))
         self.setDragDropMode(self.NoDragDrop)
         self.setAcceptDrops(False)
+        self.set_row_header_visibility()
+
+    def set_row_header_visibility(self):
+        self.row_header.setVisible(gprefs['row_numbers_in_book_list'])
 
     def drag_data(self):
         m = self.model()
@@ -1197,4 +1207,3 @@ class DeviceBooksView(BooksView):  # {{{
         self.drag_allowed = supports_backloading
 
 # }}}
-

src/calibre/gui2/preferences/look_feel.py

@@ -284,6 +284,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         r('ui_style', gprefs, restart_required=True, choices=[(_('System default'), 'system'), (_('Calibre style'),
                     'calibre')])
         r('book_list_tooltips', gprefs)
+        r('row_numbers_in_book_list', gprefs)
         r('tag_browser_old_look', gprefs, restart_required=True)
         r('tag_browser_hide_empty_categories', gprefs)
         r('bd_show_cover', gprefs)
@@ -644,13 +645,17 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         self.update_font_display()
         gui.tags_view.reread_collapse_parameters()
         gui.library_view.refresh_book_details()
+        gui.library_view.set_row_header_visibility()
         gui.cover_flow.setShowReflections(gprefs['cover_browser_reflections'])
         gui.cover_flow.setPreserveAspectRatio(gprefs['cb_preserve_aspect_ratio'])
         gui.update_cover_flow_subtitle_font()
         gui.cover_flow.template_inited = False
+        for view in 'library memory card_a card_b'.split():
+            getattr(gui, view + '_view').set_row_header_visibility()
         gui.library_view.refresh_row_sizing()
         gui.grid_view.refresh_settings()
 
+
 if __name__ == '__main__':
     from calibre.gui2 import Application
     app = Application([])

src/calibre/gui2/preferences/look_feel.ui

@@ -116,7 +116,7 @@
          </property>
         </widget>
        </item>
-       <item row="10" column="0">
+       <item row="11" column="0">
         <spacer name="verticalSpacer_3">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
@@ -191,16 +191,6 @@
          </property>
         </widget>
        </item>
-       <item row="2" column="0">
-        <widget class="QLabel" name="label_17">
-         <property name="text">
-          <string>&amp;User Interface layout (needs restart):</string>
-         </property>
-         <property name="buddy">
-          <cstring>opt_gui_layout</cstring>
-         </property>
-        </widget>
-       </item>
        <item row="0" column="0">
         <widget class="QLabel" name="label_widget_style">
          <property name="text">
@@ -211,6 +201,16 @@
          </property>
         </widget>
        </item>
+       <item row="2" column="0">
+        <widget class="QLabel" name="label_17">
+         <property name="text">
+          <string>&amp;User Interface layout (needs restart):</string>
+         </property>
+         <property name="buddy">
+          <cstring>opt_gui_layout</cstring>
+         </property>
+        </widget>
+       </item>
        <item row="4" column="1">
         <widget class="QCheckBox" name="opt_disable_animations">
          <property name="toolTip">
@@ -235,6 +235,13 @@
          </property>
         </widget>
        </item>
+       <item row="10" column="0">
+        <widget class="QCheckBox" name="opt_row_numbers_in_book_list">
+         <property name="text">
+          <string>Show &amp;row numbers in the book list</string>
+         </property>
+        </widget>
+       </item>
       </layout>
      </widget>
      <widget class="QWidget" name="cover_grid_tab">