From 9abca9d60feb6896ef11c0da04a755fd24feb867 Mon Sep 17 00:00:00 2001
From: John Schember <john@nachtimwald.com>
Date: Mon, 23 Mar 2009 19:07:14 -0400
Subject: [PATCH] Do not enable edit rows in device tab for devices that do not
 support editing ebook metadata.

---
 src/calibre/devices/interface.py    |  2 ++
 src/calibre/devices/usbms/driver.py |  1 +
 src/calibre/gui2/library.py         | 12 +++++++++---
 src/calibre/gui2/main.py            |  2 ++
 4 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/calibre/devices/interface.py b/src/calibre/devices/interface.py
index ed51962236..21790e3c46 100644
--- a/src/calibre/devices/interface.py
+++ b/src/calibre/devices/interface.py
@@ -24,6 +24,8 @@ class Device(object):
     # it can be a list of the BCD numbers of all devices supported by this driver.
     BCD         = None
     THUMBNAIL_HEIGHT = 68 # Height for thumbnails on device
+    # Whether the metadata on books can be set via the GUI.
+    CAN_SET_METADATA = True
     
     def __init__(self, key='-1', log_packets=False, report_progress=None) :
         """ 
diff --git a/src/calibre/devices/usbms/driver.py b/src/calibre/devices/usbms/driver.py
index 4285881447..68041a19cd 100644
--- a/src/calibre/devices/usbms/driver.py
+++ b/src/calibre/devices/usbms/driver.py
@@ -35,6 +35,7 @@ class USBMS(Device):
     EBOOK_DIR_MAIN = ''
     EBOOK_DIR_CARD = ''
     SUPPORTS_SUB_DIRS = False
+    CAN_SET_METADATA = False
 
     def __init__(self, key='-1', log_packets=False, report_progress=None):
         Device.__init__(self, key=key, log_packets=log_packets,
diff --git a/src/calibre/gui2/library.py b/src/calibre/gui2/library.py
index d7581bf458..9f82b3b318 100644
--- a/src/calibre/gui2/library.py
+++ b/src/calibre/gui2/library.py
@@ -708,6 +708,9 @@ class BooksView(TableView):
 
     def close(self):
         self._model.close()
+        
+    def set_editable(self, editable):
+        self._model.set_editable(editable)
 
     def connect_to_search_box(self, sb):
         QObject.connect(sb, SIGNAL('search(PyQt_PyObject, PyQt_PyObject)'),
@@ -785,7 +788,7 @@ class DeviceBooksModel(BooksModel):
         self.unknown = str(self.trUtf8('Unknown'))
         self.marked_for_deletion = {}
         self.search_engine = OnDeviceSearch(self)
-
+        self.editable = True
 
     def mark_for_deletion(self, job, rows):
         self.marked_for_deletion[job] = self.indices(rows)
@@ -793,7 +796,6 @@ class DeviceBooksModel(BooksModel):
             indices = self.row_indices(row)
             self.emit(SIGNAL('dataChanged(QModelIndex, QModelIndex)'), indices[0], indices[-1])
 
-
     def deletion_done(self, job, succeeded=True):
         if not self.marked_for_deletion.has_key(job):
             return
@@ -818,7 +820,7 @@ class DeviceBooksModel(BooksModel):
         if self.map[index.row()] in self.indices_to_be_deleted():
             return Qt.ItemIsUserCheckable  # Can't figure out how to get the disabled flag in python
         flags = QAbstractTableModel.flags(self, index)
-        if index.isValid():
+        if index.isValid() and self.editable:
             if index.column() in [0, 1] or (index.column() == 4 and self.db.supports_tags()):
                 flags |= Qt.ItemIsEditable
         return flags
@@ -999,6 +1001,10 @@ class DeviceBooksModel(BooksModel):
                 self.sort(col, self.sorted_on[1])
             done = True
         return done
+        
+    def set_editable(self, editable):
+        self.editable = editable
+        
 
 class SearchBox(QLineEdit):
 
diff --git a/src/calibre/gui2/main.py b/src/calibre/gui2/main.py
index 76775ae9bf..f297d1465c 100644
--- a/src/calibre/gui2/main.py
+++ b/src/calibre/gui2/main.py
@@ -585,7 +585,9 @@ class Main(MainWindow, Ui_MainWindow):
             return
         mainlist, cardlist = job.result
         self.memory_view.set_database(mainlist)
+        self.memory_view.set_editable(self.device_manager.device_class.CAN_SET_METADATA)
         self.card_view.set_database(cardlist)
+        self.card_view.set_editable(self.device_manager.device_class.CAN_SET_METADATA)
         for view in (self.memory_view, self.card_view):
             view.sortByColumn(3, Qt.DescendingOrder)
             if not view.restore_column_widths():