fix: Fixed some compatibility issues for lower versions of Calibre.

components/__init__.py

@@ -5,21 +5,3 @@
 from .alert import AlertMessage
 from .table import AdvancedTranslationTable
 from .mode import ModeSelection
-
-
-try:
-    from qt.core import Qt, QFrame
-except ImportError:
-    from PyQt5.Qt import Qt, QFrame
-
-
-def get_divider():
-    divider = QFrame()
-    divider.setFrameShape(QFrame.HLine)
-    divider.setFrameShadow(QFrame.Sunken)
-    # divider.setFrameStyle(QFrame.HLine | QFrame.Sunken)
-    return divider
-
-
-def qt_version():
-    return vars(Qt).get('QT_VERSION_STR')

components/table.py

@@ -8,12 +8,12 @@
     from qt.core import (
         Qt, QTableWidget, QHeaderView, QMenu, QAbstractItemView, QCursor,
         QBrush, QTableWidgetItem, pyqtSignal, QTableWidgetSelectionRange,
-        QColor)
+        QColor, QT_VERSION_STR)
 except ImportError:
     from PyQt5.Qt import (
         Qt, QTableWidget, QHeaderView, QMenu, QAbstractItemView, QCursor,
         QBrush, QTableWidgetItem, pyqtSignal, QTableWidgetSelectionRange,
-        QColor)
+        QColor, QT_VERSION_STR)
 
 load_translations()
 
@@ -25,6 +25,9 @@ def __init__(self, parent, paragraphs):
         QTableWidget.__init__(self, parent)
         self.parent = parent
         self.paragraphs = paragraphs
+
+        # self.setFocusPolicy(Qt.NoFocus)
+
         self.alert = AlertMessage(self)
         self.layout()
 
@@ -77,6 +80,7 @@ def track_row_data(self, row):
 
     def check_row_alignment(self, paragraph):
         item = self.verticalHeaderItem(paragraph.row)
+
         if paragraph.background is None:
             paragraph.background = item.background()
         if paragraph.foreground is None:
@@ -96,12 +100,14 @@ def check_row_alignment(self, paragraph):
                 'the translated text.')
             paragraph.aligned = False
 
-        item.setBackground(background)
-        item.setForeground(foreground)
-        item.setToolTip(tip)
+        if QT_VERSION_STR >= '6.0.0':
+            item.setBackground(background)
+            item.setForeground(foreground)
+            item.setToolTip(tip)
         for column in range(self.columnCount()):
             item = self.item(paragraph.row, column)
             item.setBackground(background)
+            item.setForeground(foreground)
             item.setToolTip(tip)
 
     def non_aligned_count(self):

setting.py

@@ -10,22 +10,22 @@
 from .engines import GeminiPro
 from .components import (
     layout_info, AlertMessage, TargetLang, SourceLang, EngineList,
-    EngineTester, get_divider, ManageCustomEngine, InputFormat, OutputFormat)
+    EngineTester, ManageCustomEngine, InputFormat, OutputFormat)
 
 try:
     from qt.core import (
         Qt, QLabel, QDialog, QWidget, QLineEdit, QPushButton, QPlainTextEdit,
         QTabWidget, QHBoxLayout, QVBoxLayout, QGroupBox, QFileDialog, QColor,
         QIntValidator, QScrollArea, QRadioButton, QGridLayout, QCheckBox,
-        QButtonGroup, QColorDialog, QSpinBox, QPalette, QApplication,
+        QButtonGroup, QColorDialog, QSpinBox, QPalette, QApplication, QFrame,
         QComboBox, QRegularExpression, pyqtSignal, QFormLayout, QDoubleSpinBox,
         QSettings, QSpacerItem, QRegularExpressionValidator, QBoxLayout)
 except ImportError:
     from PyQt5.Qt import (
         Qt, QLabel, QDialog, QWidget, QLineEdit, QPushButton, QPlainTextEdit,
         QTabWidget, QHBoxLayout, QVBoxLayout, QGroupBox, QFileDialog, QColor,
         QIntValidator, QScrollArea, QRadioButton, QGridLayout, QCheckBox,
-        QButtonGroup, QColorDialog, QSpinBox, QPalette, QApplication,
+        QButtonGroup, QColorDialog, QSpinBox, QPalette, QApplication, QFrame,
         QComboBox, QRegularExpression, pyqtSignal, QFormLayout, QDoubleSpinBox,
         QSettings, QSpacerItem, QRegularExpressionValidator, QBoxLayout)
 
@@ -46,6 +46,13 @@ def __init__(self, plugin, parent, icon):
 
         self.main_layout()
 
+    def _divider(self):
+        divider = QFrame()
+        divider.setFrameShape(QFrame.HLine)
+        divider.setFrameShadow(QFrame.Sunken)
+        # divider.setFrameStyle(QFrame.HLine | QFrame.Sunken)
+        return divider
+
     def main_layout(self):
         layout = QVBoxLayout(self)
 
@@ -111,7 +118,7 @@ def layout_general(self):
         mode_layout.addWidget(advanced_mode, 0, 1)
         mode_layout.addWidget(batch_mode, 0, 2)
         mode_layout.addItem(QSpacerItem(0, 0), 0, 3)
-        mode_layout.addWidget(get_divider(), 1, 1, 1, 4)
+        mode_layout.addWidget(self._divider(), 1, 1, 1, 4)
         mode_layout.addWidget(QLabel(
             _('Choose a translation mode for clicking the icon button.')),
             2, 1, 1, 4)
@@ -757,9 +764,12 @@ def layout_content(self):
             or position_btn_group.buttonClicked[int]
 
         names = ('TopToBottom', 'BottomToTop', 'RightToLeft', 'LeftToRight')
-        directions = [
-            getattr(QBoxLayout, name, None) or getattr(
-                QBoxLayout.Direction, name) for name in names]
+        directions = []
+        for name in names:
+            direction = getattr(QBoxLayout, name, None)
+            if direction is None:
+                direction = getattr(QBoxLayout.Direction, name)
+            directions.append(direction)
 
         def choose_option(btn_id):
             original_sample.setVisible(btn_id != 4)
@@ -906,7 +916,7 @@ def choose_glossary_file():
 
         filter_layout.addWidget(scope_group)
         filter_layout.addWidget(mode_group)
-        filter_layout.addWidget(get_divider())
+        filter_layout.addWidget(self._divider())
         filter_layout.addWidget(tip)
         filter_layout.addWidget(self.filter_rules)
         layout.addWidget(filter_group)