From 7b76aaeb6ee506793d205814796e54ff44c8be84 Mon Sep 17 00:00:00 2001
From: un-pogaz <46523284+un-pogaz@users.noreply.github.com>
Date: Sun, 18 Jan 2026 16:05:26 +0100
Subject: [PATCH] Bookshelf: allow override colors theme

---
 src/calibre/gui2/__init__.py                  |  1 +
 src/calibre/gui2/library/bookshelf_view.py    | 11 +++++++++-
 .../look_feel_tabs/bookshelf_view.py          |  6 ++++++
 .../look_feel_tabs/bookshelf_view.ui          | 21 +++++++++++++++++--
 4 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/src/calibre/gui2/__init__.py b/src/calibre/gui2/__init__.py
index 070cb6a821..64a4f7faef 100644
--- a/src/calibre/gui2/__init__.py
+++ b/src/calibre/gui2/__init__.py
@@ -506,6 +506,7 @@ def create_defs():
     defs['bookshelf_divider_text_right'] = False
     defs['bookshelf_start_with_divider'] = False
     defs['bookshelf_divider_style'] = 'text'
+    defs['bookshelf_theme_override'] = 'none'
 
     # Migrate beta bookshelf_thumbnail
     if isinstance(btv := gprefs.get('bookshelf_thumbnail'), bool):
diff --git a/src/calibre/gui2/library/bookshelf_view.py b/src/calibre/gui2/library/bookshelf_view.py
index 8f9335c996..ef4829b3ca 100644
--- a/src/calibre/gui2/library/bookshelf_view.py
+++ b/src/calibre/gui2/library/bookshelf_view.py
@@ -68,7 +68,7 @@ from xxhash import xxh3_64_intdigest
 from calibre import fit_image
 from calibre.db.cache import Cache
 from calibre.ebooks.metadata import authors_to_string, rating_to_stars
-from calibre.gui2 import config, gprefs, is_dark_theme
+from calibre.gui2 import config, gprefs
 from calibre.gui2.library.alternate_views import (
     ClickStartData,
     double_click_action,
@@ -230,6 +230,13 @@ class WoodTheme(NamedTuple):
         )
 
 
+def is_dark_theme():
+    from calibre.gui2 import is_dark_theme
+    if gprefs['bookshelf_theme_override'] == 'none':
+        return is_dark_theme()
+    return gprefs['bookshelf_theme_override'] == 'dark'
+
+
 def color_with_alpha(c: QColor, a: int) -> QColor:
     ans = QColor(c)
     ans.setAlpha(a)
@@ -1517,6 +1524,7 @@ class BookshelfView(MomentumScrollMixin, QAbstractScrollArea):
         '''Refresh the gui and render settings.'''
         self.template_inited = False
         self.calculate_shelf_geometry()
+        self.palette_changed()
         if hasattr(self, 'cover_cache'):
             self.cover_cache.set_thumbnail_size(*self.thumbnail_size())
             self.cover_cache.set_disk_cache_max_size(gprefs['bookshelf_disk_cache_size'])
@@ -1526,6 +1534,7 @@ class BookshelfView(MomentumScrollMixin, QAbstractScrollArea):
     def palette_changed(self):
         self.text_color_for_dark_background = dark_palette().color(QPalette.ColorRole.WindowText)
         self.text_color_for_light_background = light_palette().color(QPalette.ColorRole.WindowText)
+        self.setPalette(dark_palette() if is_dark_theme() else light_palette())
 
     def view_is_visible(self) -> bool:
         '''Return if the bookshelf view is visible.'''
diff --git a/src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.py b/src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.py
index 4f2850c604..23067816c7 100644
--- a/src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.py
+++ b/src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.py
@@ -112,6 +112,12 @@ class BookshelfTab(QTabWidget, LazyConfigWidgetBase, Ui_Form):
         r('bookshelf_author_template', db.prefs)
         r('bookshelf_spine_size_template', db.prefs)
 
+        r('bookshelf_theme_override', gprefs, choices=[
+            (_('Global setting'), 'none'),
+            (_('Light'), 'light'),
+            (_('Dark'), 'dark'),
+        ])
+
         self.config_cache.link(
             self.gui.bookshelf_view.cover_cache,
             'bookshelf_disk_cache_size', 'bookshelf_cache_size_multiple',
diff --git a/src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.ui b/src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.ui
index 0a89a9e890..6f79452716 100644
--- a/src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.ui
+++ b/src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.ui
@@ -322,7 +322,24 @@
       </item>
      </layout>
     </item>
-    <item row="11" column="0" colspan="2">
+    <item row="11" column="0">
+     <widget class="QLabel" name="label_5">
+      <property name="text">
+       <string>Colors &amp;theme:</string>
+      </property>
+      <property name="buddy">
+       <cstring>opt_bookshelf_theme_override</cstring>
+      </property>
+     </widget>
+    </item>
+    <item row="11" column="1">
+     <widget class="QComboBox" name="opt_bookshelf_theme_override">
+      <property name="toolTip">
+       <string>Control which colors theme to use for the bookshelf view</string>
+      </property>
+     </widget>
+    </item>
+    <item row="12" column="0" colspan="2">
      <layout class="QHBoxLayout" name="horizontalLayout_7">
       <item>
        <widget class="QPushButton" name="recount_button">
@@ -356,7 +373,7 @@
       </item>
      </layout>
     </item>
-    <item row="12" column="0">
+    <item row="13" column="0">
      <spacer name="vertical_spacer_1">
       <property name="orientation">
        <enum>Qt::Vertical</enum>