Bookshelf: add option to write the texts up to down

src/calibre/gui2/__init__.py

@@ -497,6 +497,7 @@ def create_defs():
     defs['bookshelf_variable_height'] = True
     defs['bookshelf_fade_time'] = 400
     defs['bookshelf_hover'] = 'shift'
+    defs['bookshelf_up_to_down'] = False
 
     # Migrate beta bookshelf_thumbnail
     if isinstance(btv := gprefs.get('bookshelf_thumbnail'), bool):

src/calibre/gui2/library/bookshelf_view.py

@@ -1726,6 +1726,9 @@ class BookshelfView(MomentumScrollMixin, QAbstractScrollArea):
 
         painter.save()
         rotate()
+        if gprefs['bookshelf_up_to_down']:
+            painter.rotate(180)
+            text_rect.adjust(max(0, line_rect.width() - 6), 0, 0, 0)
         painter.setFont(font)
         painter.drawText(text_rect, Qt.AlignmentFlag.AlignLeft | Qt.AlignmentFlag.AlignVCenter, elided_text)
         painter.restore()
@@ -1798,7 +1801,7 @@ class BookshelfView(MomentumScrollMixin, QAbstractScrollArea):
             return
         painter.save()
         painter.translate(rect.left() + rect.width() // 2, rect.top() + rect.height() // 2)
-        painter.rotate(-90)
+        painter.rotate(90 if gprefs['bookshelf_up_to_down'] else -90)
 
         # Determine text color based on spine background brightness
         text_color = self.get_contrasting_text_color(spine_color)

src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.py

@@ -31,6 +31,7 @@ class BookshelfTab(QTabWidget, LazyConfigWidgetBase, Ui_Form):
         r('bookshelf_shadow', gprefs)
         r('bookshelf_variable_height', gprefs)
         r('bookshelf_fade_time', gprefs)
+        r('bookshelf_up_to_down', gprefs)
 
         r('bookshelf_thumbnail', gprefs, choices=[
             (_('Full'), 'full'),

src/calibre/gui2/preferences/look_feel_tabs/bookshelf_view.ui

@@ -51,7 +51,7 @@
       </property>
      </widget>
     </item>
-    <item row="1" column="0">
+    <item row="10" column="0">
      <widget class="QLabel" name="label_bookshelf_thumbnail">
       <property name="text">
        <string>Cover &amp;thumbnail on the spines:</string>
@@ -61,7 +61,7 @@
       </property>
      </widget>
     </item>
-    <item row="1" column="1">
+    <item row="10" column="1">
      <widget class="QComboBox" name="opt_bookshelf_thumbnail"/>
     </item>
     <item row="0" column="1">
@@ -78,6 +78,13 @@
       </property>
      </widget>
     </item>
+    <item row="1" column="0">
+     <widget class="QCheckBox" name="opt_bookshelf_up_to_down">
+      <property name="text">
+       <string>&amp;Write the texts up to down</string>
+      </property>
+     </widget>
+    </item>
     <item row="21" column="0">
      <widget class="QLabel" name="label_fade_time">
       <property name="text">