Enhancement 1961639: Option to disable editing composite templates if edited with the Tab key

src/calibre/gui2/__init__.py

@@ -210,6 +210,7 @@ def create_defs():
     defs['edit_metadata_elision_point'] = "right"
     defs['edit_metadata_bulk_cc_label_length'] = 25
     defs['edit_metadata_single_cc_label_length'] = 12
+    defs['edit_metadata_edit_templates_only_F2_on_booklist'] = False
 
     def migrate_tweak(tweak_name, pref_name):
         # If the tweak has been changed then leave the tweak in the file so

src/calibre/gui2/library/delegates.py

@@ -13,7 +13,7 @@ from qt.core import (Qt, QApplication, QStyle, QIcon,  QDoubleSpinBox, QStyleOpt
         QStyleOptionComboBox, QStyleOptionSpinBox, QLocale, QSize, QLineEdit, QDialog, QPalette)
 
 from calibre.ebooks.metadata import rating_to_stars
-from calibre.gui2 import UNDEFINED_QDATETIME, rating_font
+from calibre.gui2 import UNDEFINED_QDATETIME, rating_font, gprefs
 from calibre.constants import iswindows
 from calibre.gui2.widgets import EnLineEdit
 from calibre.gui2.widgets2 import populate_standard_spinbox_context_menu, RatingEditor, DateTimeEdit as DateTimeEditBase
@@ -744,8 +744,14 @@ class CcTemplateDelegate(QStyledItemDelegate):  # {{{
         Delegate for custom_column bool data.
         '''
         QStyledItemDelegate.__init__(self, parent)
+        self.disallow_edit = gprefs['edit_metadata_templates_only_F2_on_booklist']
 
     def createEditor(self, parent, option, index):
+        if self.disallow_edit:
+            editor = QLineEdit(parent)
+            editor.setText(_('Template editing disabled'))
+            return editor
+        self.disallow_edit = gprefs['edit_metadata_templates_only_F2_on_booklist']
         from calibre.gui2.dialogs.template_dialog import TemplateDialog
         m = index.model()
         mi = m.db.get_metadata(index.row(), index_is_id=False)
@@ -762,4 +768,16 @@ class CcTemplateDelegate(QStyledItemDelegate):  # {{{
             m.setData(index, (editor.rule[1]), Qt.ItemDataRole.EditRole)
         return None
 
+    def setEditorData(self, editor, index):
+        editor.setText('editing templates disabled')
+        editor.setReadOnly(True)
+
+    def setModelData(self, editor, model, index):
+        pass
+
+    def allow_one_edit(self):
+        self.disallow_edit = False
+
+    def refresh(self):
+        self.disallow_edit = gprefs['edit_metadata_templates_only_F2_on_booklist']
 # }}}

src/calibre/gui2/library/views.py

@@ -866,6 +866,9 @@ class BooksView(QTableView):  # {{{
 
         self.was_restored = True
 
+    def refresh_composite_edit(self):
+        self.cc_template_delegate.refresh()
+
     def refresh_row_sizing(self):
         self.row_sizing_done = False
         self.do_row_sizing()
@@ -1225,6 +1228,10 @@ class BooksView(QTableView):  # {{{
     def keyPressEvent(self, ev):
         if handle_enter_press(self, ev):
             return
+        if ev.key() == Qt.Key.Key_F2:
+            key = self.column_map[self.currentIndex().column()]
+            if self._model.db.field_metadata[key]['datatype'] == 'composite':
+                self.cc_template_delegate.allow_one_edit()
         return QTableView.keyPressEvent(self, ev)
 
     def ids_to_rows(self, ids):

src/calibre/gui2/preferences/look_feel.py

@@ -546,6 +546,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         r('edit_metadata_single_use_2_cols_for_custom_fields', gprefs)
         r('edit_metadata_bulk_cc_label_length', gprefs)
         r('edit_metadata_single_cc_label_length', gprefs)
+        r('edit_metadata_templates_only_F2_on_booklist', gprefs)
 
         self.current_font = self.initial_font = None
         self.change_font_button.clicked.connect(self.change_font)
@@ -892,6 +893,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         gui.tags_view.reread_collapse_parameters()
         gui.library_view.refresh_book_details(force=True)
         gui.library_view.refresh_grid()
+        gui.library_view.refresh_composite_edit()
         gui.library_view.set_row_header_visibility()
         gui.cover_flow.setShowReflections(gprefs['cover_browser_reflections'])
         gui.cover_flow.setPreserveAspectRatio(gprefs['cb_preserve_aspect_ratio'])

src/calibre/gui2/preferences/look_feel.ui

@@ -1060,6 +1060,15 @@ will be elided, otherwise they will be word wrapped.</string>
             </widget>
            </item>
            <item row="2" column="0">
+            <widget class="QLabel" name="label_1023">
+             <property name="text">
+              <string>          </string>
+             </property>
+            </widget>
+           </item>
+           <item row="2" column="1">
+            <layout class="QHBoxLayout">
+             <item>
               <widget class="QLabel" name="label_102">
                <property name="text">
                 <string>Elision point:</string>
@@ -1069,7 +1078,7 @@ will be elided, otherwise they will be word wrapped.</string>
                </property>
               </widget>
              </item>
-           <item row="2" column="1">
+             <item>
               <widget class="QComboBox" name="opt_edit_metadata_elision_point">
                <property name="toolTip">
                 <string>Choose where in the label to put the...</string>
@@ -1078,6 +1087,20 @@ will be elided, otherwise they will be word wrapped.</string>
              </item>
             </layout>
            </item>
+           <item row="3" column="0" colspan="2">
+            <widget class="QCheckBox" name="opt_edit_metadata_templates_only_F2_on_booklist">
+             <property name="text">
+              <string>&amp;Tab key doesn't edit column templates on the book list</string>
+             </property>
+             <property name="toolTip">
+              <string>&lt;p&gt;Check this box to disable editing the template for
+a "Column made from other columns" on the book list when the column is entered
+using the Tab key. The F2 (Edit) key will still open the template editor.&lt;/p&gt;</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
          <item>
           <layout class="QFormLayout">
            <item row="0" column="0" colspan="2">