When vieweing a book on the device by clicking in the book details panel, first copy the book off the device, this allows it to work for the smart device driver and the MTP driver

src/calibre/gui2/actions/view.py

@@ -256,6 +256,15 @@ def update_history(self, views, remove=frozenset()):
             db.prefs['gui_view_history'] = history[:vh]
             self.build_menus(db)
 
+    def view_device_book(self, path):
+        pt = PersistentTemporaryFile('_view_device_book'+\
+                os.path.splitext(path)[1])
+        self.persistent_files.append(pt)
+        pt.close()
+        self.gui.device_manager.view_book(
+                Dispatcher(self.book_downloaded_for_viewing),
+                                        path, pt.name)
+
     def _view_books(self, rows):
         if not rows or len(rows) == 0:
             self._launch_viewer()
@@ -270,12 +279,5 @@ def _view_books(self, rows):
         else:
             paths = self.gui.current_view().model().paths(rows)
             for path in paths:
-                pt = PersistentTemporaryFile('_viewer_'+\
-                        os.path.splitext(path)[1])
-                self.persistent_files.append(pt)
-                pt.close()
-                self.gui.device_manager.view_book(\
-                        Dispatcher(self.book_downloaded_for_viewing),
-                                              path, pt.name)
-
+                self.view_device_book(path)
 

src/calibre/gui2/book_details.py

@@ -19,8 +19,8 @@
 from calibre.ebooks.metadata.sources.identify import urls_from_identifiers
 from calibre.constants import filesystem_encoding
 from calibre.library.comments import comments_to_html
-from calibre.gui2 import (config, open_local_file, open_url, pixmap_to_data,
-        gprefs, rating_font)
+from calibre.gui2 import (config, open_url, pixmap_to_data, gprefs,
+        rating_font)
 from calibre.utils.icu import sort_key
 from calibre.utils.formatter import EvalFormatter
 from calibre.utils.date import is_date_undefined
@@ -569,6 +569,7 @@ class BookDetails(QWidget): # {{{
     files_dropped = pyqtSignal(object, object)
     cover_changed = pyqtSignal(object, object)
     cover_removed = pyqtSignal(object)
+    view_device_book = pyqtSignal(object)
 
     # Drag 'n drop {{{
     DROPABBLE_EXTENSIONS = IMAGE_EXTENSIONS+BOOK_EXTENSIONS
@@ -643,7 +644,7 @@ def handle_click(self, link):
             id_, fmt = val.split(':')
             self.view_specific_format.emit(int(id_), fmt)
         elif typ == 'devpath':
-            open_local_file(val)
+            self.view_device_book.emit(val)
         else:
             try:
                 open_url(QUrl(link, QUrl.TolerantMode))

src/calibre/gui2/init.py

@@ -269,6 +269,8 @@ def finalize_layout(self):
                 self.iactions['Remove Books'].remove_format_by_id)
         self.book_details.save_specific_format.connect(
                 self.iactions['Save To Disk'].save_library_format_by_ids)
+        self.book_details.view_device_book.connect(
+                self.iactions['View'].view_device_book)
 
         m = self.library_view.model()
         if m.rowCount(None) > 0: