Edit book: Add a setting to control cursor width under Preferences->Editor settings

src/calibre/gui2/tweak_book/__init__.py

@@ -19,6 +19,7 @@ d['editor_font_family'] = None
 d['editor_font_size'] = 12
 d['editor_line_wrap'] = True
 d['editor_tab_stop_width'] = 2
+d['editor_cursor_width'] = 1
 d['editor_show_char_under_cursor'] = True
 d['replace_entities_as_typed'] = True
 d['preview_refresh_time'] = 2

src/calibre/gui2/tweak_book/editor/text.py

@@ -7,6 +7,7 @@ import os
 import re
 import textwrap
 import unicodedata
+from contextlib import suppress
 
 import regex
 from qt.core import (
@@ -229,6 +230,8 @@ class TextEdit(PlainTextEdit):
         prefs = prefs or tprefs
         self.setAcceptDrops(prefs.get('editor_accepts_drops', True))
         self.setLineWrapMode(QPlainTextEdit.LineWrapMode.WidgetWidth if prefs['editor_line_wrap'] else QPlainTextEdit.LineWrapMode.NoWrap)
+        with suppress(Exception):
+            self.setCursorWidth(int(prefs.get('editor_cursor_width', 1)))
         theme = get_theme(prefs['editor_theme'])
         self.apply_theme(theme)
         fm = self.fontMetrics()

src/calibre/gui2/tweak_book/preferences.py

@@ -197,6 +197,10 @@ class EditorSettings(BasicSettings):  # {{{
         fs.setMinimum(8), fs.setSuffix(' pt'), fs.setMaximum(50)
         l.addRow(_('Editor font &size:'), fs)
 
+        cs = self('editor_cursor_width')
+        cs.setMinimum(1), cs.setSuffix(' px'), cs.setMaximum(50)
+        l.addRow(_('Editor cursor &width:'), cs)
+
         choices = self.theme_choices()
         theme = self.choices_widget('editor_theme', choices, 'auto', 'auto')
         self.custom_theme_button = b = QPushButton(_('Create/edit &custom color schemes'))