Merge from trunk

src/calibre/devices/interface.py

@@ -95,6 +95,10 @@ class DevicePlugin(Plugin):
     #: call post_yank_cleanup().
     MANAGES_DEVICE_PRESENCE = False
 
+    #: If set the True, calibre will call the :method:`get_driveinfo()` method
+    #: after the books lists have been loaded to get the driveinfo.
+    SLOW_DRIVEINFO = False
+
     @classmethod
     def get_gui_name(cls):
         if hasattr(cls, 'gui_name'):
@@ -352,6 +356,18 @@ class DevicePlugin(Plugin):
         """
         raise NotImplementedError()
 
+    def get_driveinfo(self):
+        '''
+        Return the driveinfo dictionary. Usually called from
+        get_device_information(), but if loading the driveinfo is slow for this
+        driver, then it should set SLOW_DRIVEINFO. In this case, this method
+        will be called by calibre after the book lists have been loaded. Note
+        that it is not called on the device thread, so the driver should cache
+        the drive info in the books() method and this function should return
+        the cached data.
+        '''
+        return {}
+
     def card_prefix(self, end_session=True):
         '''
         Return a 2 element list of the prefix to paths on the cards.

src/calibre/devices/kindle/driver.py

@@ -288,7 +288,7 @@ class KINDLE2(KINDLE):
     name           = 'Kindle 2/3/4/Touch Device Interface'
     description    = _('Communicate with the Kindle 2/3/4/Touch eBook reader.')
 
-    FORMATS        = KINDLE.FORMATS + ['pdf', 'azw4', 'pobi']
+    FORMATS        = ['azw3'] + KINDLE.FORMATS + ['pdf', 'azw4', 'pobi']
     DELETE_EXTS    = KINDLE.DELETE_EXTS + ['.mbp1', '.mbs', '.sdr']
 
     PRODUCT_ID = [0x0002, 0x0004]
@@ -449,7 +449,7 @@ class KINDLE_DX(KINDLE2):
     name           = 'Kindle DX Device Interface'
     description    = _('Communicate with the Kindle DX eBook reader.')
 
-
+    FORMATS = KINDLE2.FORMATS[1:]
     PRODUCT_ID = [0x0003]
     BCD        = [0x0100]
 
@@ -462,7 +462,6 @@ class KINDLE_FIRE(KINDLE2):
     description = _('Communicate with the Kindle Fire')
     gui_name = 'Fire'
     FORMATS = list(KINDLE2.FORMATS)
-    FORMATS.insert(0, 'azw3')
 
     PRODUCT_ID = [0x0006]
     BCD = [0x216, 0x100]

src/calibre/devices/mtp/driver.py

@@ -35,6 +35,7 @@ class MTP_DEVICE(BASE):
     MANAGES_DEVICE_PRESENCE = True
     FORMATS = ['epub', 'azw3', 'mobi', 'pdf']
     DEVICE_PLUGBOARD_NAME = 'MTP_DEVICE'
+    SLOW_DRIVEINFO = True
 
     def __init__(self, *args, **kwargs):
         BASE.__init__(self, *args, **kwargs)
@@ -47,12 +48,13 @@ class MTP_DEVICE(BASE):
             from calibre.library.save_to_disk import config
             self._prefs = p = JSONConfig('mtp_devices')
             p.defaults['format_map'] = self.FORMATS
-            p.defaults['send_to'] = ['Books', 'eBooks/import', 'eBooks',
-                    'wordplayer/calibretransfer', 'sdcard/ebooks',
-                    'kindle']
+            p.defaults['send_to'] = ['Calibre_Companion', 'Books',
+                    'eBooks/import', 'eBooks', 'wordplayer/calibretransfer',
+                    'sdcard/ebooks', 'kindle']
             p.defaults['send_template'] = config().parse().send_template
             p.defaults['blacklist'] = []
             p.defaults['history'] = {}
+            p.defaults['rules'] = []
 
         return self._prefs
 
@@ -75,6 +77,7 @@ class MTP_DEVICE(BASE):
     def open(self, devices, library_uuid):
         self.current_library_uuid = library_uuid
         self.location_paths = None
+        self.driveinfo = {}
         BASE.open(self, devices, library_uuid)
         h = self.prefs['history']
         if self.current_serial_num:
@@ -106,15 +109,19 @@ class MTP_DEVICE(BASE):
         dinfo['mtp_prefix'] = storage.storage_prefix
         raw = json.dumps(dinfo, default=to_json)
         self.put_file(storage, self.DRIVEINFO, BytesIO(raw), len(raw))
-        self.driveinfo = dinfo
+        self.driveinfo[location_code] = dinfo
+
+    def get_driveinfo(self):
+        if not self.driveinfo:
+            self.driveinfo = {}
+            for sid, location_code in ( (self._main_id, 'main'), (self._carda_id,
+                'A'), (self._cardb_id, 'B')):
+                if sid is None: continue
+                self._update_drive_info(self.filesystem_cache.storage(sid), location_code)
+        return self.driveinfo
 
     def get_device_information(self, end_session=True):
         self.report_progress(1.0, _('Get device information...'))
-        self.driveinfo = {}
-        for sid, location_code in ( (self._main_id, 'main'), (self._carda_id,
-            'A'), (self._cardb_id, 'B')):
-            if sid is None: continue
-            self._update_drive_info(self.filesystem_cache.storage(sid), location_code)
         dinfo = self.get_basic_device_information()
         return tuple( list(dinfo) + [self.driveinfo] )
 
@@ -134,6 +141,7 @@ class MTP_DEVICE(BASE):
     def books(self, oncard=None, end_session=True):
         from calibre.devices.mtp.books import JSONCodec
         from calibre.devices.mtp.books import BookList, Book
+        self.get_driveinfo() # Ensure driveinfo is loaded
         sid = {'carda':self._carda_id, 'cardb':self._cardb_id}.get(oncard,
                 self._main_id)
         if sid is None:
@@ -273,15 +281,18 @@ class MTP_DEVICE(BASE):
         self.plugboards = plugboards
         self.plugboard_func = pb_func
 
-    def create_upload_path(self, path, mdata, fname):
+    def create_upload_path(self, path, mdata, fname, routing):
         from calibre.devices.utils import create_upload_path
         from calibre.utils.filenames import ascii_filename as sanitize
+        ext = fname.rpartition('.')[-1].lower()
+        path = routing.get(ext, path)
+
         filepath = create_upload_path(mdata, fname, self.save_template, sanitize,
                 prefix_path=path,
                 path_type=posixpath,
                 maxlen=self.MAX_PATH_LEN,
-                use_subdirs = True,
-                news_in_folder = self.NEWS_IN_FOLDER,
+                use_subdirs=True,
+                news_in_folder=self.NEWS_IN_FOLDER,
                 )
         return tuple(x for x in filepath.split('/'))
 
@@ -329,8 +340,10 @@ class MTP_DEVICE(BASE):
         self.report_progress(0, _('Transferring books to device...'))
         i, total = 0, len(files)
 
+        routing = {fmt:dest for fmt,dest in self.get_pref('rules')}
+
         for infile, fname, mi in izip(files, names, metadata):
-            path = self.create_upload_path(prefix, mi, fname)
+            path = self.create_upload_path(prefix, mi, fname, routing)
             parent = self.ensure_parent(storage, path)
             if hasattr(infile, 'read'):
                 pos = infile.tell()

src/calibre/devices/mtp/filesystem_cache.py

@@ -230,6 +230,9 @@ class FilesystemCache(object):
                     continue # Ignore .txt files in the root
                 yield x
 
+    def __len__(self):
+        return len(self.id_map)
+
     def resolve_mtp_id_path(self, path):
         if not path.startswith('mtp:::'):
             raise ValueError('%s is not a valid MTP path'%path)

src/calibre/devices/mtp/unix/driver.py

@@ -7,7 +7,7 @@ __license__   = 'GPL v3'
 __copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-import operator, traceback, pprint, sys
+import operator, traceback, pprint, sys, time
 from threading import RLock
 from collections import namedtuple
 from functools import partial
@@ -16,7 +16,7 @@ from calibre import prints, as_unicode
 from calibre.constants import plugins
 from calibre.ptempfile import SpooledTemporaryFile
 from calibre.devices.errors import OpenFailed, DeviceError, BlacklistedDevice
-from calibre.devices.mtp.base import MTPDeviceBase, synchronous
+from calibre.devices.mtp.base import MTPDeviceBase, synchronous, debug
 
 MTPDevice = namedtuple('MTPDevice', 'busnum devnum vendor_id product_id '
         'bcd serial manufacturer product')
@@ -193,6 +193,8 @@ class MTP_DEVICE(MTPDeviceBase):
     @property
     def filesystem_cache(self):
         if self._filesystem_cache is None:
+            st = time.time()
+            debug('Loading filesystem metadata...')
             from calibre.devices.mtp.filesystem_cache import FilesystemCache
             with self.lock:
                 storage, all_items, all_errs = [], [], []
@@ -220,6 +222,8 @@ class MTP_DEVICE(MTPDeviceBase):
                                 self.current_friendly_name,
                                 self.format_errorstack(all_errs)))
                 self._filesystem_cache = FilesystemCache(storage, all_items)
+            debug('Filesystem metadata loaded in %g seconds (%d objects)'%(
+                time.time()-st, len(self._filesystem_cache)))
         return self._filesystem_cache
 
     @synchronous

src/calibre/devices/mtp/windows/driver.py

@@ -16,7 +16,7 @@ from calibre import as_unicode, prints
 from calibre.constants import plugins, __appname__, numeric_version
 from calibre.ptempfile import SpooledTemporaryFile
 from calibre.devices.errors import OpenFailed, DeviceError, BlacklistedDevice
-from calibre.devices.mtp.base import MTPDeviceBase
+from calibre.devices.mtp.base import MTPDeviceBase, debug
 
 class ThreadingViolation(Exception):
 
@@ -199,6 +199,8 @@ class MTP_DEVICE(MTPDeviceBase):
     @property
     def filesystem_cache(self):
         if self._filesystem_cache is None:
+            debug('Loading filesystem metadata...')
+            st = time.time()
             from calibre.devices.mtp.filesystem_cache import FilesystemCache
             ts = self.total_space()
             all_storage = []
@@ -218,6 +220,8 @@ class MTP_DEVICE(MTPDeviceBase):
                 all_storage.append(storage)
                 items.append(id_map.itervalues())
             self._filesystem_cache = FilesystemCache(all_storage, chain(*items))
+            debug('Filesystem metadata loaded in %g seconds (%d objects)'%(
+                time.time()-st, len(self._filesystem_cache)))
         return self._filesystem_cache
 
     @same_thread

src/calibre/gui2/__init__.py

@@ -499,6 +499,7 @@ class FileIconProvider(QFileIconProvider):
         self.icons = {}
         for key in self.__class__.ICONS.keys():
             self.icons[key] = I('mimetypes/')+self.__class__.ICONS[key]+'.png'
+        self.icons['calibre'] = I('lt.png')
         for i in ('dir', 'default', 'zero'):
             self.icons[i] = QIcon(self.icons[i])
 

src/calibre/gui2/book_details.py

@@ -152,8 +152,16 @@ def render_data(mi, use_roman_numbers=True, all_fields=False):
                 scheme = u'devpath' if isdevice else u'path'
                 url = prepare_string_for_xml(path if isdevice else
                         unicode(mi.id), True)
-                link = u'<a href="%s:%s" title="%s">%s</a>' % (scheme, url,
-                        prepare_string_for_xml(path, True), _('Click to open'))
+                pathstr = _('Click to open')
+                extra = ''
+                if isdevice:
+                    durl = url
+                    if durl.startswith('mtp:::'):
+                        durl = ':::'.join( (durl.split(':::'))[2:] )
+                    extra = '<br><span style="font-size:smaller">%s</span>'%(
+                            prepare_string_for_xml(durl))
+                link = u'<a href="%s:%s" title="%s">%s</a>%s' % (scheme, url,
+                        prepare_string_for_xml(path, True), pathstr, extra)
                 ans.append((field, u'<td class="title">%s</td><td>%s</td>'%(name, link)))
         elif field == 'formats':
             if isdevice: continue

src/calibre/gui2/convert/mobi_output.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>588</width>
-    <height>342</height>
+    <height>416</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -91,23 +91,33 @@
       <item row="0" column="1">
        <widget class="QComboBox" name="opt_mobi_file_type"/>
       </item>
-      <item row="1" column="0">
+      <item row="3" column="0">
        <widget class="QLabel" name="label_3">
         <property name="text">
          <string>Personal Doc tag:</string>
         </property>
        </widget>
       </item>
-      <item row="1" column="1">
+      <item row="3" column="1">
        <widget class="QLineEdit" name="opt_personal_doc"/>
       </item>
-      <item row="2" column="0" colspan="2">
+      <item row="4" column="0" colspan="2">
        <widget class="QCheckBox" name="opt_share_not_sync">
         <property name="text">
          <string>Enable sharing of book content via Facebook, etc. WARNING: Disables last read syncing</string>
         </property>
        </widget>
       </item>
+      <item row="2" column="0" colspan="2">
+       <widget class="QLabel" name="label_4">
+        <property name="text">
+         <string>&lt;b&gt;WARNING:&lt;/b&gt; Various Kindle devices have trouble displaying the new or both MOBI filetypes. If you wish to use the new format on your device, convert to AZW3 instead of MOBI.</string>
+        </property>
+        <property name="wordWrap">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>

src/calibre/gui2/device.py

@@ -433,6 +433,15 @@ class DeviceManager(Thread): # {{{
         return self.create_job_step(self._get_device_information, done,
                     description=_('Get device information'), to_job=add_as_step_to_job)
 
+    def slow_driveinfo(self):
+        ''' Update the stored device information with the driveinfo if the
+        device indicates that getting driveinfo is slow '''
+        info = self._device_information['info']
+        if (not info[4] and self.device.SLOW_DRIVEINFO):
+            info = list(info)
+            info[4] = self.device.get_driveinfo()
+            self._device_information['info'] = tuple(info)
+
     def get_current_device_information(self):
         return self._device_information
 
@@ -1023,6 +1032,7 @@ class DeviceMixin(object): # {{{
         if job.failed:
             self.device_job_exception(job)
             return
+        self.device_manager.slow_driveinfo()
         # set_books_in_library might schedule a sync_booklists job
         self.set_books_in_library(job.result, reset=True, add_as_step_to_job=job)
         mainlist, cardalist, cardblist = job.result

src/calibre/gui2/device_drivers/mtp_config.py

@@ -11,12 +11,14 @@ import weakref
 
 from PyQt4.Qt import (QWidget, QListWidgetItem, Qt, QToolButton, QLabel,
         QTabWidget, QGridLayout, QListWidget, QIcon, QLineEdit, QVBoxLayout,
-        QPushButton)
+        QPushButton, QGroupBox, QScrollArea, QHBoxLayout, QComboBox,
+        pyqtSignal, QSizePolicy, QDialog, QDialogButtonBox)
 
 from calibre.ebooks import BOOK_EXTENSIONS
 from calibre.gui2 import error_dialog
 from calibre.gui2.dialogs.template_dialog import TemplateDialog
 from calibre.utils.date import parse_date
+from calibre.gui2.device_drivers.mtp_folder_browser import Browser
 
 class FormatsConfig(QWidget): # {{{
 
@@ -86,7 +88,7 @@ class TemplateConfig(QWidget): # {{{
         m.setBuddy(t)
         l.addWidget(m, 0, 0, 1, 2)
         l.addWidget(t, 1, 0, 1, 1)
-        b = self.b = QPushButton(_('Template editor'))
+        b = self.b = QPushButton(_('&Template editor'))
         l.addWidget(b, 1, 1, 1, 1)
         b.clicked.connect(self.edit_template)
 
@@ -116,19 +118,36 @@ class TemplateConfig(QWidget): # {{{
 
 class SendToConfig(QWidget): # {{{
 
-    def __init__(self, val):
+    def __init__(self, val, device):
         QWidget.__init__(self)
         self.t = t = QLineEdit(self)
         t.setText(', '.join(val or []))
         t.setCursorPosition(0)
-        self.l = l = QVBoxLayout(self)
+        self.l = l = QGridLayout(self)
         self.setLayout(l)
         self.m = m = QLabel('<p>'+_('''A <b>list of &folders</b> on the device to
         which to send ebooks. The first one that exists will be used:'''))
         m.setWordWrap(True)
         m.setBuddy(t)
-        l.addWidget(m)
-        l.addWidget(t)
+        l.addWidget(m, 0, 0, 1, 2)
+        l.addWidget(t, 1, 0)
+        self.b = b = QToolButton()
+        l.addWidget(b, 1, 1)
+        b.setIcon(QIcon(I('document_open.png')))
+        b.clicked.connect(self.browse)
+        b.setToolTip(_('Browse for a folder on the device'))
+        self._device = weakref.ref(device)
+
+    @property
+    def device(self):
+        return self._device()
+
+    def browse(self):
+        b = Browser(self.device.filesystem_cache, show_files=False,
+                parent=self)
+        if b.exec_() == b.Accepted:
+            sid, path = b.current_item
+            self.t.setText('/'.join(path[1:]))
 
     @property
     def value(self):
@@ -176,6 +195,135 @@ class IgnoredDevices(QWidget): # {{{
 
 # }}}
 
+# Rules {{{
+
+class Rule(QWidget):
+
+    remove = pyqtSignal(object)
+
+    def __init__(self, device, rule=None):
+        QWidget.__init__(self)
+        self._device = weakref.ref(device)
+
+        self.l = l = QHBoxLayout()
+        self.setLayout(l)
+
+        self.l1 = l1 = QLabel(_('Send the '))
+        l.addWidget(l1)
+        self.fmt = f = QComboBox(self)
+        l.addWidget(f)
+        self.l2 = l2 = QLabel(_(' format to the folder: '))
+        l.addWidget(l2)
+        self.folder = f = QLineEdit(self)
+        f.setPlaceholderText(_('Folder on the device'))
+        l.addWidget(f)
+        self.b = b = QToolButton()
+        l.addWidget(b)
+        b.setIcon(QIcon(I('document_open.png')))
+        b.clicked.connect(self.browse)
+        b.setToolTip(_('Browse for a folder on the device'))
+        self.rb = rb = QPushButton(QIcon(I('list_remove.png')),
+                _('&Remove rule'), self)
+        l.addWidget(rb)
+        rb.clicked.connect(self.removed)
+
+        for fmt in sorted(BOOK_EXTENSIONS):
+            self.fmt.addItem(fmt.upper(), fmt.lower())
+
+        self.fmt.setCurrentIndex(0)
+
+        if rule is not None:
+            fmt, folder = rule
+            idx = self.fmt.findText(fmt.upper())
+            if idx > -1:
+                self.fmt.setCurrentIndex(idx)
+            self.folder.setText(folder)
+
+        self.ignore = False
+
+    @property
+    def device(self):
+        return self._device()
+
+    def browse(self):
+        b = Browser(self.device.filesystem_cache, show_files=False,
+                parent=self)
+        if b.exec_() == b.Accepted:
+            sid, path = b.current_item
+            self.folder.setText('/'.join(path[1:]))
+
+    def removed(self):
+        self.remove.emit(self)
+
+    @property
+    def rule(self):
+        folder = unicode(self.folder.text()).strip()
+        if folder:
+            return (
+                unicode(self.fmt.itemData(self.fmt.currentIndex()).toString()),
+                folder
+                )
+        return None
+
+class FormatRules(QGroupBox):
+
+    def __init__(self, device, rules):
+        QGroupBox.__init__(self, _('Format specific sending'))
+        self._device = weakref.ref(device)
+        self.l = l = QVBoxLayout()
+        self.setLayout(l)
+        self.la = la = QLabel('<p>'+_(
+            '''You can create rules that control where ebooks of a specific
+            format are sent to on the device. These will take precedence over
+            the folders specified above.'''))
+        la.setWordWrap(True)
+        l.addWidget(la)
+        self.sa = sa = QScrollArea(self)
+        sa.setWidgetResizable(True)
+        self.w = w = QWidget(self)
+        w.l = QVBoxLayout()
+        w.setLayout(w.l)
+        sa.setWidget(w)
+        l.addWidget(sa)
+        self.widgets = []
+        for rule in rules:
+            r = Rule(device, rule)
+            self.widgets.append(r)
+            w.l.addWidget(r)
+            r.remove.connect(self.remove_rule)
+
+        if not self.widgets:
+            self.add_rule()
+
+        self.b = b = QPushButton(QIcon(I('plus.png')), _('Add a &new rule'))
+        l.addWidget(b)
+        b.clicked.connect(self.add_rule)
+        self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Ignored)
+
+    @property
+    def device(self):
+        return self._device()
+
+    def add_rule(self):
+        r = Rule(self.device)
+        self.widgets.append(r)
+        self.w.l.addWidget(r)
+        r.remove.connect(self.remove_rule)
+        self.sa.verticalScrollBar().setValue(self.sa.verticalScrollBar().maximum())
+
+    def remove_rule(self, rule):
+        rule.setVisible(False)
+        rule.ignore = True
+
+    @property
+    def rules(self):
+        for w in self.widgets:
+            if not w.ignore:
+                r = w.rule
+                if r is not None:
+                    yield r
+# }}}
+
 class MTPConfig(QTabWidget):
 
     def __init__(self, device, parent=None):
@@ -185,8 +333,8 @@ class MTPConfig(QTabWidget):
         cd = msg = None
         if device.current_friendly_name is not None:
             if device.current_serial_num is None:
-                msg = '<p>' + _('The <b>%s</b> device has no serial number, '
-                    'it cannot be configured'%device.current_friendly_name)
+                msg = '<p>' + (_('The <b>%s</b> device has no serial number, '
+                    'it cannot be configured')%device.current_friendly_name)
             else:
                 cd = 'device-'+device.current_serial_num
         else:
@@ -211,24 +359,28 @@ class MTPConfig(QTabWidget):
             l = self.base.l = QGridLayout(self.base)
             self.base.setLayout(l)
 
+            self.rules = r = FormatRules(self.device, self.get_pref('rules'))
             self.formats = FormatsConfig(set(BOOK_EXTENSIONS),
                     self.get_pref('format_map'))
-            self.send_to = SendToConfig(self.get_pref('send_to'))
+            self.send_to = SendToConfig(self.get_pref('send_to'), self.device)
             self.template = TemplateConfig(self.get_pref('send_template'))
             self.base.la = la = QLabel(_(
                 'Choose the formats to send to the %s')%self.device.current_friendly_name)
             la.setWordWrap(True)
-            l.addWidget(la, 0, 0, 1, 1)
-            l.addWidget(self.formats, 1, 0, 2, 1)
-            l.addWidget(self.send_to, 1, 1, 1, 1)
-            l.addWidget(self.template, 2, 1, 1, 1)
-            l.setRowStretch(2, 10)
-            self.base.b = b = QPushButton(QIcon(I('minus.png')),
-                _('Ignore the %s in calibre')%device.current_friendly_name,
+            self.base.b = b = QPushButton(QIcon(I('list_remove.png')),
+                _('&Ignore the %s in calibre')%device.current_friendly_name,
                 self.base)
-            l.addWidget(b, 3, 0, 1, 2)
             b.clicked.connect(self.ignore_device)
 
+            l.addWidget(b, 0, 0, 1, 2)
+            l.addWidget(la, 1, 0, 1, 1)
+            l.addWidget(self.formats, 2, 0, 3, 1)
+            l.addWidget(self.send_to, 2, 1, 1, 1)
+            l.addWidget(self.template, 3, 1, 1, 1)
+            l.setRowStretch(4, 10)
+            l.addWidget(r, 5, 0, 1, 2)
+            l.setRowStretch(5, 100)
+
         self.igntab = IgnoredDevices(self.device.prefs['history'],
                 self.device.prefs['blacklist'])
         self.addTab(self.igntab, _('Ignored devices'))
@@ -280,6 +432,11 @@ class MTPConfig(QTabWidget):
             if s and s != self.device.prefs['send_to']:
                 p['send_to'] = s
 
+            p.pop('rules', None)
+            r = list(self.rules.rules)
+            if r and r != self.device.prefs['rules']:
+                p['rules'] = r
+
             self.device.prefs[self.current_device_key] = p
 
         self.device.prefs['blacklist'] = self.igntab.blacklist
@@ -296,8 +453,16 @@ if __name__ == '__main__':
     cd = dev.detect_managed_devices(s.devices)
     dev.open(cd, 'test')
     cw = dev.config_widget()
-    cw.show()
-    app.exec_()
+    d = QDialog()
+    d.l = QVBoxLayout()
+    d.setLayout(d.l)
+    d.l.addWidget(cw)
+    bb = QDialogButtonBox(QDialogButtonBox.Ok|QDialogButtonBox.Cancel)
+    d.l.addWidget(bb)
+    bb.accepted.connect(d.accept)
+    bb.rejected.connect(d.reject)
+    if d.exec_() == d.Accepted:
+        cw.commit()
     dev.shutdown()
 
 

src/calibre/gui2/device_drivers/mtp_folder_browser.py

@@ -0,0 +1,119 @@
+#!/usr/bin/env python
+# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:fdm=marker:ai
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__   = 'GPL v3'
+__copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
+__docformat__ = 'restructuredtext en'
+
+from operator import attrgetter
+
+from PyQt4.Qt import (QTabWidget, QTreeWidget, QTreeWidgetItem, Qt, QDialog,
+        QDialogButtonBox, QVBoxLayout, QSize, pyqtSignal, QIcon)
+
+from calibre.gui2 import file_icon_provider
+
+def item(f, parent):
+    name = f.name
+    if not f.is_folder:
+        name += ' [%s]'%f.last_mod_string
+    ans = QTreeWidgetItem(parent, [name])
+    ans.setData(0, Qt.UserRole, f.full_path)
+    if f.is_folder:
+        ext = 'dir'
+    else:
+        ext = f.name.rpartition('.')[-1]
+    ans.setData(0, Qt.DecorationRole, file_icon_provider().icon_from_ext(ext))
+
+    return ans
+
+class Storage(QTreeWidget):
+
+    def __init__(self, storage, show_files):
+        QTreeWidget.__init__(self)
+        self.show_files = show_files
+        self.create_children(storage, self)
+        self.name = storage.name
+        self.object_id = storage.persistent_id
+        self.setMinimumHeight(350)
+        self.setHeaderHidden(True)
+
+    def create_children(self, f, parent):
+        for child in sorted(f.folders, key=attrgetter('name')):
+            i = item(child, parent)
+            self.create_children(child, i)
+        if self.show_files:
+            for child in sorted(f.files, key=attrgetter('name')):
+                i = item(child, parent)
+
+    @property
+    def current_item(self):
+        item = self.currentItem()
+        if item is not None:
+            return (self.object_id, item.data(0, Qt.UserRole).toPyObject())
+        return None
+
+class Folders(QTabWidget):
+
+    selected = pyqtSignal()
+
+    def __init__(self, filesystem_cache, show_files=True):
+        QTabWidget.__init__(self)
+        self.fs = filesystem_cache
+        for storage in self.fs.entries:
+            w = Storage(storage, show_files)
+            self.addTab(w, w.name)
+            w.doubleClicked.connect(self.selected)
+
+        self.setCurrentIndex(0)
+
+    @property
+    def current_item(self):
+        w = self.currentWidget()
+        if w is not None:
+            return w.current_item
+
+class Browser(QDialog):
+
+    def __init__(self, filesystem_cache, show_files=True, parent=None):
+        QDialog.__init__(self, parent)
+        self.l = l = QVBoxLayout()
+        self.setLayout(l)
+        self.folders = cw = Folders(filesystem_cache, show_files=show_files)
+        l.addWidget(cw)
+        bb = QDialogButtonBox(QDialogButtonBox.Ok|QDialogButtonBox.Cancel)
+        l.addWidget(bb)
+        bb.accepted.connect(self.accept)
+        bb.rejected.connect(self.reject)
+        self.setMinimumSize(QSize(500, 500))
+        self.folders.selected.connect(self.accept)
+        self.setWindowTitle(_('Choose folder on device'))
+        self.setWindowIcon(QIcon(I('devices/galaxy_s3.png')))
+
+    @property
+    def current_item(self):
+        return self.folders.current_item
+
+def browse():
+    from calibre.gui2 import Application
+    from calibre.devices.mtp.driver import MTP_DEVICE
+    from calibre.devices.scanner import DeviceScanner
+    s = DeviceScanner()
+    s.scan()
+    app = Application([])
+    app
+    dev = MTP_DEVICE(None)
+    dev.startup()
+    cd = dev.detect_managed_devices(s.devices)
+    if cd is None:
+        raise ValueError('No MTP device found')
+    dev.open(cd, 'test')
+    d = Browser(dev.filesystem_cache)
+    d.exec_()
+    dev.shutdown()
+    return d.current_item
+
+if __name__ == '__main__':
+    print (browse())
+