Make plugin work in Calibre 6 (Qt 6)

DeDRM_plugin/adobekey.py

@@ -136,7 +136,7 @@ if iswindows:
             if os.path.isfile(os.path.join(p, "libcrypto-1_1.dll")):
                 return os.path.join(p, "libcrypto-1_1.dll")
             if os.path.isfile(os.path.join(p, "libeay32.dll")):
-                return os.path.join(p, "libeay.dll")
+                return os.path.join(p, "libeay32.dll")
         return None
 
     def _load_crypto_libcrypto():

DeDRM_plugin/config.py

@@ -327,7 +327,13 @@ class ManageKeysDialog(QDialog):
             self.export_key_button.setIcon(QIcon(I('save.png')))
             self.export_key_button.clicked.connect(self.export_key)
             button_layout.addWidget(self.export_key_button)
-        spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
+        try: 
+            # QT 6
+            spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Policy.Minimum, QtGui.QSizePolicy.Policy.Expanding)
+        except AttributeError:
+            # QT 5
+            spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
+
         button_layout.addItem(spacerItem)
 
         if self.wineprefix is not None:
@@ -811,7 +817,7 @@ class AddBandNKeyDialog(QDialog):
         self.cbType.addItem("Extract passhashes from Adobe Digital Editions")
         self.cbType.addItem("Extract key from Nook Windows application")
         self.cbType.addItem("Extract key from Nook Android application")
-        self.cbType.currentIndexChanged.connect(self.update_form, self.cbType.currentIndex())
+        self.cbType.currentIndexChanged.connect(lambda: self.update_form(self.cbType.currentIndex()))
         self.layout.addWidget(self.cbType)
 
         self.button_box = QDialogButtonBox(QDialogButtonBox.Cancel)

DeDRM_plugin/standalone/remove_drm.py

@@ -142,7 +142,7 @@ def perform_action(params, files):
             return 0
 
     if overwrite_original and (output is not None or outputdir is not None):
-        print("Can't use --overwrite together with --output or --outputdir.")
+        print("Can't use --overwrite together with --output or --outputdir.", file=sys.stderr)
         return 1
 
     if output is not None and os.path.isfile(output) and not force:
@@ -155,8 +155,8 @@ def perform_action(params, files):
         return 1
     
     if outputdir is not None and output is not None and os.path.isabs(output): 
-        print("--output parameter is absolute path despite --outputdir being set.")
-        print("Remove --outputdir, or give a relative path to --output.")
+        print("--output parameter is absolute path despite --outputdir being set.", file=sys.stderr)
+        print("Remove --outputdir, or give a relative path to --output.", file=sys.stderr)
         return 1
 
 
@@ -166,7 +166,7 @@ def perform_action(params, files):
         file = os.path.abspath(file)
 
         if not os.path.isfile(file):
-            print("Skipping file " + file + " - not found.")
+            print("Skipping file " + file + " - not found.", file=sys.stderr)
             continue
 
         if overwrite_original:

Obok_plugin/config.py

@@ -118,7 +118,13 @@ class ManageKeysDialog(QDialog):
         self._delete_key_button.clicked.connect(self.delete_key)
         button_layout.addWidget(self._delete_key_button)
 
-        spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
+        try: 
+            # QT 6
+            spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Policy.Minimum, QtGui.QSizePolicy.Policy.Expanding)
+        except AttributeError:
+            # QT 5
+            spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
+            
         button_layout.addItem(spacerItem)
 
         layout.addSpacing(5)