gpodder/src/gpodder/gui.py

# -*- coding: utf-8 -*-
#
# gPodder - A media aggregator and podcast client
# Copyright (c) 2005-2008 Thomas Perl and the gPodder Team
#
# gPodder is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# gPodder is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

import os
import gtk
import gtk.gdk
import gobject
import pango
import sys
import shutil
import subprocess
import glob
import time

from xml.sax import saxutils

from threading import Event
from threading import Thread
from string import strip

import gpodder
from gpodder import util
from gpodder import opml
from gpodder import services
from gpodder import sync
from gpodder import download
from gpodder import SimpleGladeApp
from gpodder.liblogger import log

try:
    from gpodder import trayicon
    have_trayicon = True
except Exception, exc:
    log('Warning: Could not import gpodder.trayicon.', traceback=True)
    log('Warning: This probably means your PyGTK installation is too old!')
    have_trayicon = False

from libpodcasts import podcastChannel
from libpodcasts import channels_to_model
from libpodcasts import load_channels
from libpodcasts import save_channels

from gpodder.libgpodder import gl

from libplayers import UserAppsReader

from libtagupdate import tagging_supported

if gpodder.interface == gpodder.GUI:
    WEB_BROWSER_ICON = 'web-browser'
elif gpodder.interface == gpodder.MAEMO:
    import hildon
    WEB_BROWSER_ICON = 'qgn_toolb_browser_web'

app_name = "gpodder"
app_version = "unknown" # will be set in main() call
app_authors = [
    _('Current maintainer:'), 'Thomas Perl <thpinfo.com>',
    '',
    _('Patches, bug reports and donations by:'), 'Adrien Beaucreux',
    'Alain Tauch', 'Alistair Sutton', 'Anders Kvist', 'Andy Busch',
    'Antonio Roversi', 'Aravind Seshadri', 'Atte André Jensen', 
    'Bernd Schlapsi', 'Bill Barnard', 'Bjørn Rasmussen', 'Camille Moncelier',
    'Carlos Moffat', 'Chris', 'Chris Arnold', 'Clark Burbidge',
    'David Spreen', 'Doug Hellmann', 'FFranci72', 'Florian Richter', 'Frank Harper',
    'FriedBunny', 'Gerrit Sangel', 'Götz Waschk',
    'Haim Roitgrund', 'Hex', 'Holger Bauer', 'Holger Leskien', 'Jens Thiele',
    'Jérôme Chabod', 'Jerry Moss',
    'Jessica Henline', 'João Trindade', 'Joel Calado', 'John Ferguson', 
    'José Luis Fustel', 'Joseph Bleau', 'Julio Acuña', 'Junio C Hamano',
    'Jürgen Schinker', 'Justin Forest',
    'Konstantin Ryabitsev', 'Leonid Ponomarev', 'Marcos Hernández', 'Mark Alford', 'Michael Salim', 
    'Mika Leppinen', 'Mike Coulson', 'Mykola Nikishov', 'narf at inode.at',
    'Nick L.', 'Nicolas Quienot', 'Ondrej Vesely', 
    'Ortwin Forster', 'Paul Elliot', 'Paul Rudkin',
    'Pavel Mlčoch', 'Peter Hoffmann', 'Philippe Gouaillier', 'Pieter de Decker',
    'Preben Randhol', 'Rafael Proença', 'red26wings', 'Richard Voigt', 
    'Robert Young', 'Roel Groeneveld',
    'Scott Wegner', 'Seth Remington', 'Shane Donohoe', 'SPGoetze',
    'Stefan Lohmaier', 'Stephan Buys', 'Stylianos Papanastasiou', 'Teo Ramirez', 
    'Thomas Matthijs', 'Thomas Mills Hinkle', 'Thomas Nilsson', 
    'Tim Michelsen', 'Tim Preetz', 'Todd Zullinger', 'Tomas Matheson', 'VladDrac', 
    'Vladimir Zemlyakov', 'Wilfred van Rooijen',
    '',
    'List may be incomplete - please contact me.'
]
app_copyright = '© 2005-2008 Thomas Perl and the gPodder Team'
app_website = 'http://www.gpodder.org/'

# these will be filled with pathnames in bin/gpodder
glade_dir = [ 'share', 'gpodder' ]
icon_dir = [ 'share', 'pixmaps', 'gpodder.png' ]
scalable_dir = [ 'share', 'icons', 'hicolor', 'scalable', 'apps', 'gpodder.svg' ]


class GladeWidget(SimpleGladeApp.SimpleGladeApp):
    gpodder_main_window = None
    finger_friendly_widgets = []

    def __init__( self, **kwargs):
        path = os.path.join( glade_dir, '%s.glade' % app_name)
        root = self.__class__.__name__
        domain = app_name

        SimpleGladeApp.SimpleGladeApp.__init__( self, path, root, domain, **kwargs)

        # Set widgets to finger-friendly mode if on Maemo
        for widget_name in self.finger_friendly_widgets:
            self.set_finger_friendly(getattr(self, widget_name))

        if root == 'gPodder':
            GladeWidget.gpodder_main_window = self.gPodder
        else:
            # If we have a child window, set it transient for our main window
            getattr( self, root).set_transient_for( GladeWidget.gpodder_main_window)

            if gpodder.interface == gpodder.GUI:
                if hasattr( self, 'center_on_widget'):
                    ( x, y ) = self.gpodder_main_window.get_position()
                    a = self.center_on_widget.allocation
                    ( x, y ) = ( x + a.x, y + a.y )
                    ( w, h ) = ( a.width, a.height )
                    ( pw, ph ) = getattr( self, root).get_size()
                    getattr( self, root).move( x + w/2 - pw/2, y + h/2 - ph/2)
                else:
                    getattr( self, root).set_position( gtk.WIN_POS_CENTER_ON_PARENT)

    def notification(self, message, title=None):
        util.idle_add(self.show_message, message, title)

    def show_message( self, message, title = None):
        if hasattr(self, 'tray_icon') and hasattr(self, 'minimized') and self.tray_icon and self.minimized:
            if title is None:
                title = 'gPodder'
            self.tray_icon.send_notification(message, title)            
            return
        
        if gpodder.interface == gpodder.GUI:
            dlg = gtk.MessageDialog(GladeWidget.gpodder_main_window, gtk.DIALOG_MODAL, gtk.MESSAGE_INFO, gtk.BUTTONS_OK)
            if title:
                dlg.set_title(str(title))
                dlg.set_markup('<span weight="bold" size="larger">%s</span>\n\n%s' % (title, message))
            else:
                dlg.set_markup('<span weight="bold" size="larger">%s</span>' % (message))
        elif gpodder.interface == gpodder.MAEMO:
            dlg = hildon.Note('information', (GladeWidget.gpodder_main_window, message))
        
        dlg.run()
        dlg.destroy()

    def set_finger_friendly(self, widget):
        """
        If we are on Maemo, we carry out the necessary
        operations to turn a widget into a finger-friendly
        one, depending on which type of widget it is (i.e.
        buttons will have more padding, TreeViews a thick
        scrollbar, etc..)
        """
        if gpodder.interface == gpodder.MAEMO:
            if isinstance(widget, gtk.Misc):
                widget.set_padding(0, 5)
            elif isinstance(widget, gtk.Button):
                for child in widget.get_children():
                    if isinstance(child, gtk.Alignment):
                        child.set_padding(10, 10, 5, 5)
                    else:
                        child.set_padding(10, 10)
            elif isinstance(widget, gtk.TreeView) or isinstance(widget, gtk.TextView):
                parent = widget.get_parent()
                if isinstance(parent, gtk.ScrolledWindow):
                    hildon.hildon_helper_set_thumb_scrollbar(parent, True)
            elif isinstance(widget, gtk.MenuItem):
                for child in widget.get_children():
                    self.set_finger_friendly(child)
            else:
                log('Cannot set widget finger-friendly: %s', widget, sender=self)
                
        return widget

    def show_confirmation( self, message, title = None):
        if gpodder.interface == gpodder.GUI:
            affirmative = gtk.RESPONSE_YES
            dlg = gtk.MessageDialog(GladeWidget.gpodder_main_window, gtk.DIALOG_MODAL, gtk.MESSAGE_QUESTION, gtk.BUTTONS_YES_NO)
            if title:
                dlg.set_title(str(title))
                dlg.set_markup('<span weight="bold" size="larger">%s</span>\n\n%s' % (title, message))
            else:
                dlg.set_markup('<span weight="bold" size="larger">%s</span>' % (message))
        elif gpodder.interface == gpodder.MAEMO:
            affirmative = gtk.RESPONSE_OK
            dlg = hildon.Note('confirmation', (GladeWidget.gpodder_main_window, message))

        response = dlg.run()
        dlg.destroy()
        
        return response == affirmative

    def show_copy_dialog( self, src_filename, dst_filename = None, dst_directory = None, title = _('Select destination')):
        if dst_filename is None:
            dst_filename = src_filename

        if dst_directory is None:
            dst_directory = os.path.expanduser( '~')

        ( base, extension ) = os.path.splitext( src_filename)

        if not dst_filename.endswith( extension):
            dst_filename += extension

        if gpodder.interface == gpodder.GUI:
            dlg = gtk.FileChooserDialog(title=title, parent=GladeWidget.gpodder_main_window, action=gtk.FILE_CHOOSER_ACTION_SAVE)
            dlg.add_button(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
            dlg.add_button(gtk.STOCK_SAVE, gtk.RESPONSE_OK)
        elif gpodder.interface == gpodder.MAEMO:
            dlg = hildon.FileChooserDialog(GladeWidget.gpodder_main_window, gtk.FILE_CHOOSER_ACTION_SAVE)

        dlg.set_do_overwrite_confirmation( True)
        dlg.set_current_name( os.path.basename( dst_filename))
        dlg.set_current_folder( dst_directory)

        if dlg.run() == gtk.RESPONSE_OK:
            dst_filename = dlg.get_filename()
            if not dst_filename.endswith( extension):
                dst_filename += extension

            log( 'Copying %s => %s', src_filename, dst_filename, sender = self)

            try:
                shutil.copyfile( src_filename, dst_filename)
            except:
                log( 'Error copying file.', sender = self, traceback = True)

        dlg.destroy()



class gPodder(GladeWidget):
    finger_friendly_widgets = ['btnUpdateFeeds', 'btnCancelFeedUpdate', 'treeAvailable', 'label2', 'labelDownloads']
    ENTER_URL_TEXT = _('Enter podcast URL...')
    
    def new(self):
        if gpodder.interface == gpodder.MAEMO:
            # Maemo-specific changes to the UI
            global scalable_dir
            scalable_dir = scalable_dir.replace('.svg', '.png')
            
            self.app = hildon.Program()
            gtk.set_application_name('gPodder')
            self.window = hildon.Window()
            self.window.connect('delete-event', self.on_gPodder_delete_event)
            self.window.connect('window-state-event', self.window_state_event)
            self.window.connect('key-press-event', self.on_key_press)
            
            # Give toolbar to the hildon window
            self.toolbar.parent.remove(self.toolbar)
            self.toolbar.set_style(gtk.TOOLBAR_ICONS)
            self.window.add_toolbar(self.toolbar)
         
            self.app.add_window(self.window)
            self.vMain.reparent(self.window)
            self.gPodder = self.window
            
            # Reparent the main menu
            menu = gtk.Menu()
            for child in self.mainMenu.get_children():
                child.reparent(menu)
            self.itemQuit.reparent(menu)
            self.window.set_menu(menu)
         
            self.mainMenu.destroy()
            self.window.show()
            
            # do some widget hiding
            self.toolbar.remove(self.toolTransfer)
            self.itemTransferSelected.hide_all()
            self.item_show_url_entry.hide_all()
            self.item_email_subscriptions.hide_all()

            # Feed cache update button
            self.label120.set_text(_('Update'))
            
            # get screen real estate
            self.hboxContainer.set_border_width(0)

        self.treeChannels.connect('size-allocate', self.on_tree_channels_resize)

        if gpodder.interface == gpodder.MAEMO or not gl.config.show_podcast_url_entry:
            self.hboxAddChannel.hide_all()

        if not gl.config.show_toolbar:
            self.toolbar.hide_all()

        gl.config.add_observer(self.on_config_changed)
        self.default_entry_text_color = self.entryAddChannel.get_style().text[gtk.STATE_NORMAL]
        self.entryAddChannel.connect('focus-in-event', self.entry_add_channel_focus)
        self.entryAddChannel.connect('focus-out-event', self.entry_add_channel_unfocus)
        self.entry_add_channel_unfocus(self.entryAddChannel, None)
        
        self.uar = None
        self.tray_icon = None

        self.fullscreen = False
        self.minimized = False
        self.gPodder.connect('window-state-event', self.window_state_event)
        
        self.already_notified_new_episodes = []
        self.show_hide_tray_icon()
        self.no_episode_selected.set_sensitive(False)

        self.itemShowToolbar.set_active(gl.config.show_toolbar)
        self.itemShowDescription.set_active(gl.config.episode_list_descriptions)
        self.item_show_url_entry.set_active(gl.config.show_podcast_url_entry)
                   
        gl.config.connect_gtk_window( self.gPodder)
        gl.config.connect_gtk_paned( 'paned_position', self.channelPaned)

        gl.config.connect_gtk_spinbutton('max_downloads', self.spinMaxDownloads)
        gl.config.connect_gtk_togglebutton('max_downloads_enabled', self.cbMaxDownloads)
        gl.config.connect_gtk_spinbutton('limit_rate_value', self.spinLimitDownloads)
        gl.config.connect_gtk_togglebutton('limit_rate', self.cbLimitDownloads)

        # Make sure we free/close the download queue when we
        # update the "max downloads" spin button
        changed_cb = lambda spinbutton: services.download_status_manager.update_max_downloads()
        self.spinMaxDownloads.connect('value-changed', changed_cb)

        self.default_title = None
        if app_version.rfind('svn') != -1:
            self.set_title('gPodder %s' % app_version)
        else:
            self.set_title(self.gPodder.get_title())

        gtk.about_dialog_set_url_hook(lambda dlg, link, data: util.open_website(link), None)

        # cell renderers for channel tree
        namecolumn = gtk.TreeViewColumn( _('Podcast'))

        iconcell = gtk.CellRendererPixbuf()
        namecolumn.pack_start( iconcell, False)
        namecolumn.add_attribute( iconcell, 'pixbuf', 5)
        self.cell_channel_icon = iconcell

        namecell = gtk.CellRendererText()
        namecell.set_property('ellipsize', pango.ELLIPSIZE_END)
        namecolumn.pack_start( namecell, True)
        namecolumn.add_attribute( namecell, 'markup', 2)
        namecolumn.add_attribute( namecell, 'weight', 4)

        iconcell = gtk.CellRendererPixbuf()
        namecolumn.pack_start( iconcell, False)
        namecolumn.add_attribute( iconcell, 'pixbuf', 3)
        self.cell_channel_pill = iconcell

        self.treeChannels.append_column( namecolumn)
        self.treeChannels.set_headers_visible(False)

        # enable alternating colors hint
        self.treeAvailable.set_rules_hint( True)
        self.treeChannels.set_rules_hint( True)

        # connect to tooltip signals
        try:
            self.treeChannels.set_property('has-tooltip', True)
            self.treeChannels.connect('query-tooltip', self.treeview_channels_query_tooltip)
        except:
            log('No tooltips for channel navigator (need at least PyGTK 2.12)', sender = self)
        self.last_tooltip_channel = None

        # Add our context menu to treeAvailable
        if gpodder.interface == gpodder.MAEMO:
            self.treeAvailable.connect('button-release-event', self.treeview_button_pressed)
        else:
            self.treeAvailable.connect('button-press-event', self.treeview_button_pressed)
        self.treeChannels.connect('button-press-event', self.treeview_channels_button_pressed)

        iconcell = gtk.CellRendererPixbuf()
        if gpodder.interface == gpodder.MAEMO:
            status_column_label = ''
        else:
            status_column_label = _('Status')
        iconcolumn = gtk.TreeViewColumn(status_column_label, iconcell, pixbuf=4)

        namecell = gtk.CellRendererText()
        namecell.set_property('ellipsize', pango.ELLIPSIZE_END)
        namecolumn = gtk.TreeViewColumn(_("Episode"), namecell, markup=6)
        namecolumn.set_sizing(gtk.TREE_VIEW_COLUMN_AUTOSIZE)
        namecolumn.set_expand(True)

        sizecell = gtk.CellRendererText()
        sizecolumn = gtk.TreeViewColumn( _("Size"), sizecell, text=2)

        releasecell = gtk.CellRendererText()
        releasecolumn = gtk.TreeViewColumn( _("Released"), releasecell, text=5)
        
        for itemcolumn in (iconcolumn, namecolumn, sizecolumn, releasecolumn):
            itemcolumn.set_reorderable(True)
            self.treeAvailable.append_column(itemcolumn)

        if gpodder.interface == gpodder.MAEMO:
            # Due to screen space contraints, we
            # hide these columns here by default
            self.column_size = sizecolumn
            self.column_released = releasecolumn
            self.column_released.set_visible(False)
            self.column_size.set_visible(False)

        # enable search in treeavailable
        self.treeAvailable.set_search_equal_func( self.treeAvailable_search_equal)

        # enable multiple selection support
        self.treeAvailable.get_selection().set_mode( gtk.SELECTION_MULTIPLE)
        self.treeDownloads.get_selection().set_mode( gtk.SELECTION_MULTIPLE)
        
        # columns and renderers for "download progress" tab
        episodecell = gtk.CellRendererText()
        episodecell.set_property('ellipsize', pango.ELLIPSIZE_END)
        episodecolumn = gtk.TreeViewColumn( _("Episode"), episodecell, text=0)
        episodecolumn.set_sizing(gtk.TREE_VIEW_COLUMN_AUTOSIZE)
        episodecolumn.set_expand(True)
        
        speedcell = gtk.CellRendererText()
        speedcolumn = gtk.TreeViewColumn( _("Speed"), speedcell, text=1)
        
        progresscell = gtk.CellRendererProgress()
        progresscolumn = gtk.TreeViewColumn( _("Progress"), progresscell, value=2)
        progresscolumn.set_expand(True)
        
        for itemcolumn in ( episodecolumn, speedcolumn, progresscolumn ):
            self.treeDownloads.append_column( itemcolumn)

        # After we've set up most of the window, show it :)
        if not gpodder.interface == gpodder.MAEMO:
            self.gPodder.show()

        if self.tray_icon:
            if gl.config.start_iconified: 
                self.iconify_main_window()
            elif gl.config.minimize_to_tray:
                self.tray_icon.set_visible(False)

        services.download_status_manager.register( 'list-changed', self.download_status_updated)
        services.download_status_manager.register( 'progress-changed', self.download_progress_updated)

        self.treeDownloads.set_model( services.download_status_manager.tree_model)
        
        #Add Drag and Drop Support
        flags = gtk.DEST_DEFAULT_ALL
        targets = [ ('text/plain', 0, 2), ('STRING', 0, 3), ('TEXT', 0, 4) ]
        actions = gtk.gdk.ACTION_DEFAULT | gtk.gdk.ACTION_COPY
        self.treeChannels.drag_dest_set( flags, targets, actions)
        self.treeChannels.connect( 'drag_data_received', self.drag_data_received)

        # Subscribed channels
        self.active_channel = None
        self.channels = load_channels( load_items = False, offline = True)

        # load list of user applications for audio playback
        self.user_apps_reader = UserAppsReader(['audio', 'video'])
        Thread(target=self.read_apps).start()

        # Clean up old, orphaned download files
        gl.clean_up_downloads( delete_partial = True)

        # Set the "Device" menu item for the first time
        self.update_item_device()

        # Now, update the feed cache, when everything's in place
        self.feed_cache_update_cancelled = False
        self.update_feed_cache(force_update=gl.config.update_on_startup)

        # Start the auto-update procedure
        self.auto_update_procedure(first_run=True)

        # Delete old episodes if the user wishes to
        if gl.config.auto_remove_old_episodes:
            old_episodes = self.get_old_episodes()
            if len(old_episodes) > 0:
                self.delete_episode_list(old_episodes, confirm=False)
                self.updateComboBox()

        # First-time users should be asked if they want to see the OPML
        if len(self.channels) == 0:
            util.idle_add(self.on_itemUpdate_activate, None)

    def on_tree_channels_resize(self, widget, allocation):
        if not gl.config.podcast_sidebar_save_space:
            return

        window_allocation = self.gPodder.get_allocation()
        percentage = 100. * float(allocation.width) / float(window_allocation.width)
        if hasattr(self, 'cell_channel_icon'):
            self.cell_channel_icon.set_property('visible', bool(percentage > 22.))
        if hasattr(self, 'cell_channel_pill'):
            self.cell_channel_pill.set_property('visible', bool(percentage > 25.))

    def entry_add_channel_focus(self, widget, event):
        widget.modify_text(gtk.STATE_NORMAL, self.default_entry_text_color)
        if widget.get_text() == self.ENTER_URL_TEXT:
            widget.set_text('')

    def entry_add_channel_unfocus(self, widget, event):
        if widget.get_text() == '':
            widget.set_text(self.ENTER_URL_TEXT)
            widget.modify_text(gtk.STATE_NORMAL, gtk.gdk.color_parse('#aaaaaa'))

    def on_config_changed(self, name, old_value, new_value):
        if name == 'show_toolbar':
            if new_value:
                self.toolbar.show_all()
            else:
                self.toolbar.hide_all()
        elif name == 'episode_list_descriptions':
            for channel in self.channels:
                channel.force_update_tree_model()
            self.updateTreeView()
        elif name == 'show_podcast_url_entry' and gpodder.interface != gpodder.MAEMO:
            if new_value:
                self.hboxAddChannel.show_all()
            else:
                self.hboxAddChannel.hide_all()

    def read_apps(self):
        time.sleep(3) # give other parts of gpodder a chance to start up
        self.user_apps_reader.read()
        util.idle_add(self.user_apps_reader.get_applications_as_model, 'audio', False)
        util.idle_add(self.user_apps_reader.get_applications_as_model, 'video', False)

    def treeview_channels_query_tooltip(self, treeview, x, y, keyboard_tooltip, tooltip):
        (path, column, rx, ry) = treeview.get_path_at_pos( x, y) or (None,)*4

        if path is not None:
            model = treeview.get_model()
            iter = model.get_iter(path)
            url = model.get_value(iter, 0)
            for channel in self.channels:
                if channel.url == url:
                    if self.last_tooltip_channel is not None and self.last_tooltip_channel != channel:
                        self.last_tooltip_channel = None
                        return False
                    self.last_tooltip_channel = channel
                    channel.request_save_dir_size()
                    diskspace_str = gl.format_filesize(channel.save_dir_size, 0)
                    error_str = model.get_value(iter, 6)
                    if error_str:
                        error_str = _('Feedparser error: %s') % saxutils.escape(error_str.strip())
                        error_str = '<span foreground="#ff0000">%s</span>' % error_str
                    table = gtk.Table(rows=3, columns=3)
                    table.set_row_spacings(5)
                    table.set_col_spacings(5)
                    table.set_border_width(5)

                    heading = gtk.Label()
                    heading.set_alignment(0, 1)
                    heading.set_markup('<b><big>%s</big></b>\n<small>%s</small>' % (saxutils.escape(channel.title), saxutils.escape(channel.url)))
                    table.attach(heading, 0, 1, 0, 1)
                    size_info = gtk.Label()
                    size_info.set_alignment(1, 1)
                    size_info.set_justify(gtk.JUSTIFY_RIGHT)
                    size_info.set_markup('<b>%s</b>\n<small>%s</small>' % (diskspace_str, _('disk usage')))
                    table.attach(size_info, 2, 3, 0, 1)

                    table.attach(gtk.HSeparator(), 0, 3, 1, 2)

                    if len(channel.description) < 500:
                        description = channel.description
                    else:
                        pos = channel.description.find('\n\n')
                        if pos == -1 or pos > 500:
                            description = channel.description[:498]+'[...]'
                        else:
                            description = channel.description[:pos]

                    description = gtk.Label(description)
                    if error_str:
                        description.set_markup(error_str)
                    description.set_alignment(0, 0)
                    description.set_line_wrap(True)
                    table.attach(description, 0, 3, 2, 3)

                    table.show_all()
                    tooltip.set_custom(table)

                    return True

        self.last_tooltip_channel = None
        return False

    def update_m3u_playlist_clicked(self, widget):
        self.active_channel.update_m3u_playlist()
        self.show_message(_('Updated M3U playlist in download folder.'), _('Updated playlist'))

    def treeview_channels_button_pressed( self, treeview, event):
        global WEB_BROWSER_ICON

        if event.button == 3:
            ( x, y ) = ( int(event.x), int(event.y) )
            ( path, column, rx, ry ) = treeview.get_path_at_pos( x, y) or (None,)*4

            paths = []

            # Did the user right-click into a selection?
            selection = treeview.get_selection()
            if selection.count_selected_rows() and path:
                ( model, paths ) = selection.get_selected_rows()
                if path not in paths:
                    # We have right-clicked, but not into the 
                    # selection, assume we don't want to operate
                    # on the selection
                    paths = []

            # No selection or right click not in selection:
            # Select the single item where we clicked
            if not len( paths) and path:
                treeview.grab_focus()
                treeview.set_cursor( path, column, 0)

                ( model, paths ) = ( treeview.get_model(), [ path ] )

            # We did not find a selection, and the user didn't
            # click on an item to select -- don't show the menu
            if not len( paths):
                return True

            menu = gtk.Menu()

            item = gtk.ImageMenuItem( _('Open download folder'))
            item.set_image( gtk.image_new_from_icon_name( 'folder-open', gtk.ICON_SIZE_MENU))
            item.connect('activate', lambda x: util.gui_open(self.active_channel.save_dir))
            menu.append( item)

            if gl.config.create_m3u_playlists:
                item = gtk.ImageMenuItem(_('Update M3U playlist'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_REFRESH, gtk.ICON_SIZE_MENU))
                item.connect('activate', self.update_m3u_playlist_clicked)
                menu.append(item)

            if self.active_channel.link:
                item = gtk.ImageMenuItem(_('Visit website'))
                item.set_image(gtk.image_new_from_icon_name(WEB_BROWSER_ICON, gtk.ICON_SIZE_MENU))
                item.connect('activate', lambda w: util.open_website(self.active_channel.link))
                menu.append(item)

            menu.append( gtk.SeparatorMenuItem())

            item = gtk.ImageMenuItem(gtk.STOCK_EDIT)
            item.connect( 'activate', self.on_itemEditChannel_activate)
            menu.append( item)

            item = gtk.ImageMenuItem(gtk.STOCK_DELETE)
            item.connect( 'activate', self.on_itemRemoveChannel_activate)
            menu.append( item)

            menu.show_all()
            menu.popup( None, None, None, event.button, event.time)

            return True

    def on_itemClose_activate(self, widget):
        if self.tray_icon is not None:
            if gpodder.interface == gpodder.MAEMO:
                self.gPodder.set_property('visible', False)
            else:
                self.iconify_main_window()
        else:
            self.on_gPodder_delete_event(widget)

    def save_episode_as_file( self, url, *args):
        episode = self.active_channel.find_episode( url)

        self.show_copy_dialog( src_filename = episode.local_filename(), dst_filename = episode.sync_filename())

    def copy_episode_bluetooth(self, url, *args):
        episode = self.active_channel.find_episode(url)
        filename = episode.local_filename()

        if gl.config.bluetooth_ask_always:
            device = None
        else:
            device = gl.config.bluetooth_device_address

        destfile = os.path.join(gl.tempdir, episode.sync_filename())
        (base, ext) = os.path.splitext(filename)
        if not destfile.endswith(ext):
            destfile += ext

        if gl.config.bluetooth_use_converter:
            title = _('Converting file')
            message = _('Please wait while gPodder converts your media file for bluetooth file transfer.')
            dlg = gtk.MessageDialog(self.gPodder, gtk.DIALOG_MODAL, gtk.MESSAGE_INFO, gtk.BUTTONS_NONE)
            dlg.set_title(title)
            dlg.set_markup('<span weight="bold" size="larger">%s</span>\n\n%s'%(title, message))
            dlg.show_all()
        else:
            dlg = None

        def convert_and_send_thread(filename, destfile, device, dialog, notify):
            if gl.config.bluetooth_use_converter:
                p = subprocess.Popen([gl.config.bluetooth_converter, filename, destfile], stdout=sys.stdout, stderr=sys.stderr)
                result = p.wait()
                if dialog is not None:
                    dialog.destroy()
            else:
                try:
                    shutil.copyfile(filename, destfile)
                    result = 0
                except:
                    log('Cannot copy "%s" to "%s".', filename, destfile, sender=self)
                    result = 1

            if result == 0 or not os.path.exists(destfile):
                util.bluetooth_send_file(destfile, device)
            else:
                notify(_('Error converting file.'), _('Bluetooth file transfer'))
            util.delete_file(destfile)

        Thread(target=convert_and_send_thread, args=[filename, destfile, device, dlg, self.notification]).start()

    def treeview_button_pressed( self, treeview, event):
        global WEB_BROWSER_ICON

        # Use right-click for the Desktop version and left-click for Maemo
        if (event.button == 1 and gpodder.interface == gpodder.MAEMO) or \
           (event.button == 3 and gpodder.interface == gpodder.GUI):
            ( x, y ) = ( int(event.x), int(event.y) )
            ( path, column, rx, ry ) = treeview.get_path_at_pos( x, y) or (None,)*4

            paths = []

            # Did the user right-click into a selection?
            selection = self.treeAvailable.get_selection()
            if selection.count_selected_rows() and path:
                ( model, paths ) = selection.get_selected_rows()
                if path not in paths:
                    # We have right-clicked, but not into the 
                    # selection, assume we don't want to operate
                    # on the selection
                    paths = []

            # No selection or right click not in selection:
            # Select the single item where we clicked
            if not len( paths) and path:
                treeview.grab_focus()
                treeview.set_cursor( path, column, 0)

                ( model, paths ) = ( treeview.get_model(), [ path ] )

            # We did not find a selection, and the user didn't
            # click on an item to select -- don't show the menu
            if not len( paths):
                return True

            first_url = model.get_value( model.get_iter( paths[0]), 0)

            menu = gtk.Menu()

            ( can_play, can_download, can_transfer, can_cancel ) = self.play_or_download()

            if can_play:
                item = gtk.ImageMenuItem(gtk.STOCK_MEDIA_PLAY)
                item.connect( 'activate', lambda w: self.on_treeAvailable_row_activated( self.toolPlay))
                menu.append(self.set_finger_friendly(item))
                
                is_locked = gl.history_is_locked(first_url)
                if not is_locked:
                    item = gtk.ImageMenuItem(gtk.STOCK_DELETE)
                    item.connect('activate', self.on_btnDownloadedDelete_clicked)
                    menu.append(self.set_finger_friendly(item))
                    
            if can_cancel:
                item = gtk.ImageMenuItem( _('Cancel download'))
                item.set_image( gtk.image_new_from_stock( gtk.STOCK_STOP, gtk.ICON_SIZE_MENU))
                item.connect( 'activate', lambda w: self.on_treeDownloads_row_activated( self.toolCancel))
                menu.append(self.set_finger_friendly(item))

            if can_download:
                item = gtk.ImageMenuItem(_('Download'))
                item.set_image( gtk.image_new_from_stock( gtk.STOCK_GO_DOWN, gtk.ICON_SIZE_MENU))
                item.connect( 'activate', lambda w: self.on_treeAvailable_row_activated( self.toolDownload))
                menu.append(self.set_finger_friendly(item))

                is_downloaded = gl.history_is_downloaded(first_url)
                if is_downloaded:
                    item = gtk.ImageMenuItem(_('Mark as not downloaded'))
                    item.set_image( gtk.image_new_from_stock( gtk.STOCK_UNDELETE, gtk.ICON_SIZE_MENU))
                    item.connect( 'activate', lambda w: self.on_item_toggle_downloaded_activate( w, False, False))
                    menu.append(self.set_finger_friendly(item))
                else:
                    # FIXME: foreach episode go and delete/toggle downloaded episode
                    # ++ unify into a single menu item (with "Delete" from above)
                    item = gtk.ImageMenuItem(gtk.STOCK_DELETE)
                    item.connect( 'activate', lambda w: self.on_item_toggle_downloaded_activate( w, False, True))
                    menu.append(self.set_finger_friendly(item))

            if can_play:
                menu.append( gtk.SeparatorMenuItem())
                item = gtk.ImageMenuItem(_('Save to disk'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_SAVE_AS, gtk.ICON_SIZE_MENU))
                item.connect( 'activate', lambda w: self.save_episode_as_file( episode_url))
                menu.append(self.set_finger_friendly(item))
                if gl.config.bluetooth_enabled:
                    item = gtk.ImageMenuItem(_('Send via bluetooth'))
                    item.set_image(gtk.image_new_from_icon_name('bluetooth', gtk.ICON_SIZE_MENU))
                    item.connect('activate', lambda w: self.copy_episode_bluetooth(episode_url))
                    menu.append(self.set_finger_friendly(item))
                if can_transfer:
                    item = gtk.ImageMenuItem(_('Transfer to %s') % gl.get_device_name())
                    item.set_image(gtk.image_new_from_icon_name('multimedia-player', gtk.ICON_SIZE_MENU))
                    item.connect('activate', lambda w: self.on_treeAvailable_row_activated(self.toolTransfer))
                    menu.append(self.set_finger_friendly(item))

            if can_play:
                menu.append( gtk.SeparatorMenuItem())
                is_played = gl.history_is_played(first_url)
                if is_played:
                    item = gtk.ImageMenuItem(_('Mark as unplayed'))
                    item.set_image( gtk.image_new_from_stock( gtk.STOCK_CANCEL, gtk.ICON_SIZE_MENU))
                    item.connect( 'activate', lambda w: self.on_item_toggle_played_activate( w, False, False))
                    menu.append(self.set_finger_friendly(item))
                else:
                    item = gtk.ImageMenuItem(_('Mark as played'))
                    item.set_image( gtk.image_new_from_stock( gtk.STOCK_APPLY, gtk.ICON_SIZE_MENU))
                    item.connect( 'activate', lambda w: self.on_item_toggle_played_activate( w, False, True))
                    menu.append(self.set_finger_friendly(item))

                is_locked = gl.history_is_locked(first_url)
                if is_locked:
                    item = gtk.ImageMenuItem(_('Allow deletion'))
                    item.set_image(gtk.image_new_from_stock(gtk.STOCK_DIALOG_AUTHENTICATION, gtk.ICON_SIZE_MENU))
                    item.connect('activate', self.on_item_toggle_lock_activate)
                    menu.append(self.set_finger_friendly(item))
                else:
                    item = gtk.ImageMenuItem(_('Prohibit deletion'))
                    item.set_image(gtk.image_new_from_stock(gtk.STOCK_DIALOG_AUTHENTICATION, gtk.ICON_SIZE_MENU))
                    item.connect('activate', self.on_item_toggle_lock_activate)
                    menu.append(self.set_finger_friendly(item))

            if len(paths) == 1:
                menu.append(gtk.SeparatorMenuItem())
                # Single item, add episode information menu item
                episode_url = model.get_value( model.get_iter( paths[0]), 0)
                item = gtk.ImageMenuItem(_('Episode details'))
                item.set_image( gtk.image_new_from_stock( gtk.STOCK_INFO, gtk.ICON_SIZE_MENU))
                item.connect( 'activate', lambda w: self.on_treeAvailable_row_activated( self.treeAvailable))
                menu.append(self.set_finger_friendly(item))
                episode = self.active_channel.find_episode(episode_url)
                # If we have it, also add episode website link
                if episode and episode.link and episode.link != episode.url:
                    item = gtk.ImageMenuItem(_('Visit website'))
                    item.set_image(gtk.image_new_from_icon_name(WEB_BROWSER_ICON, gtk.ICON_SIZE_MENU))
                    item.connect('activate', lambda w: util.open_website(episode.link))
                    menu.append(self.set_finger_friendly(item))
            
            if gpodder.interface == gpodder.MAEMO:
                # Because we open the popup on left-click for Maemo,
                # we also include a non-action to close the menu
                menu.append(gtk.SeparatorMenuItem())
                item = gtk.ImageMenuItem(_('Close this menu'))
                item.set_image(gtk.image_new_from_stock(gtk.STOCK_CLOSE, gtk.ICON_SIZE_MENU))
                menu.append(self.set_finger_friendly(item))

            menu.show_all()
            menu.popup( None, None, None, event.button, event.time)

            return True

    def set_title(self, new_title):
        self.default_title = new_title
        self.gPodder.set_title(new_title)

    def download_progress_updated( self, count, percentage):
        title = [ self.default_title ]

        if count == 1:
            title.append( _('downloading one file'))
        elif count > 1:
            title.append( _('downloading %d files') % count)

        if len(title) == 2:
            title[1] = ''.join( [ title[1], ' (%d%%)' % ( percentage, ) ])

        self.gPodder.set_title( ' - '.join( title))

    def playback_episode( self, current_channel, current_podcast):
        (success, application) = gl.playback_episode(current_channel, current_podcast)
        if not success:
            self.show_message( _('The selected player application cannot be found. Please check your media player settings in the preferences dialog.'), _('Error opening player: %s') % ( saxutils.escape( application), ))
        self.download_status_updated()

    def treeAvailable_search_equal( self, model, column, key, iter, data = None):
        if model is None:
            return True

        key = key.lower()

        # columns, as defined in libpodcasts' get model method
        # 1 = episode title, 7 = description
        columns = (1, 7)

        for column in columns:
            value = model.get_value( iter, column).lower()
            if value.find( key) != -1:
                return False

        return True
    
    def change_menu_item(self, menuitem, icon=None, label=None):
        (label_widget, icon_widget) = menuitem.get_children()
        if icon is not None:
            icon_widget.set_from_icon_name(icon, gtk.ICON_SIZE_MENU)
        if label is not None:
            label_widget.set_text(label)

    def play_or_download( self):
        if self.wNotebook.get_current_page() > 0:
            return

        ( can_play, can_download, can_transfer, can_cancel ) = (False,)*4
        (is_played, is_locked) = (False,)*2

        selection = self.treeAvailable.get_selection()
        if selection.count_selected_rows() > 0:
            (model, paths) = selection.get_selected_rows()
         
            for path in paths:
                url = model.get_value( model.get_iter( path), 0)
                local_filename = model.get_value( model.get_iter( path), 8)

                if os.path.exists( local_filename):
                    can_play = True
                    is_played = gl.history_is_played(url)
                    is_locked = gl.history_is_locked(url)
                else:
                    if services.download_status_manager.is_download_in_progress( url):
                        can_cancel = True
                    else:
                        can_download = True

                if util.file_type_by_extension( util.file_extension_from_url( url)) == 'torrent':
                    can_download = can_download or gl.config.use_gnome_bittorrent

        can_download = can_download and not can_cancel
        can_play = can_play and not can_cancel and not can_download
        can_transfer = can_play and gl.config.device_type != 'none'

        self.toolPlay.set_sensitive( can_play)
        self.toolDownload.set_sensitive( can_download)
        self.toolTransfer.set_sensitive( can_transfer)
        self.toolCancel.set_sensitive( can_cancel)

        if can_cancel:
            self.item_cancel_download.show_all()
        else:
            self.item_cancel_download.hide_all()
        if can_download:
            self.itemDownloadSelected.show_all()
        else:
            self.itemDownloadSelected.hide_all()
        if can_play:
            self.itemPlaySelected.show_all()
            self.itemDeleteSelected.show_all()
            self.item_toggle_played.show_all()
            self.item_toggle_lock.show_all()
            self.separator9.show_all()
            if is_played:
                self.change_menu_item(self.item_toggle_played, gtk.STOCK_CANCEL, _('Mark as unplayed'))
            else:
                self.change_menu_item(self.item_toggle_played, gtk.STOCK_APPLY, _('Mark as played'))
            if is_locked:
                self.change_menu_item(self.item_toggle_lock, gtk.STOCK_DIALOG_AUTHENTICATION, _('Allow deletion'))
            else:
                self.change_menu_item(self.item_toggle_lock, gtk.STOCK_DIALOG_AUTHENTICATION, _('Prohibit deletion'))
        else:
            self.itemPlaySelected.hide_all()
            self.itemDeleteSelected.hide_all()
            self.item_toggle_played.hide_all()
            self.item_toggle_lock.hide_all()
            self.separator9.hide_all()
        if can_play or can_download or can_cancel:
            self.item_episode_details.show_all()
            self.separator16.show_all()
            self.no_episode_selected.hide_all()
        else:
            self.item_episode_details.hide_all()
            self.separator16.hide_all()
            self.no_episode_selected.show_all()

        return ( can_play, can_download, can_transfer, can_cancel )

    def download_status_updated( self):
        count = services.download_status_manager.count()
        if count:
            self.labelDownloads.set_text( _('Downloads (%d)') % count)
        else:
            self.labelDownloads.set_text( _('Downloads'))

        for channel in self.channels:
            channel.update_model()

        self.updateComboBox()

    def on_cbMaxDownloads_toggled(self, widget, *args):
        self.spinMaxDownloads.set_sensitive(self.cbMaxDownloads.get_active())
        
    def on_cbLimitDownloads_toggled(self, widget, *args):
        self.spinLimitDownloads.set_sensitive(self.cbLimitDownloads.get_active())    

    def updateComboBox(self, selected_url=None):
        (model, iter) = self.treeChannels.get_selection().get_selected()

        if model and iter and selected_url is None:
            # Get the URL of the currently-selected podcast
            selected_url = model.get_value(iter, 0)

        rect = self.treeChannels.get_visible_rect()
        self.treeChannels.set_model(channels_to_model(self.channels))
        util.idle_add(self.treeChannels.scroll_to_point, rect.x, rect.y)

        try:
            selected_path = (0,)
            # Find the previously-selected URL in the new
            # model if we have an URL (else select first)
            if selected_url is not None:
                model = self.treeChannels.get_model()
                pos = model.get_iter_first()
                while pos is not None:
                    url = model.get_value(pos, 0)
                    if url == selected_url:
                        selected_path = model.get_path(pos)
                        break
                    pos = model.iter_next(pos)

            self.treeChannels.get_selection().select_path(selected_path)
        except:
            log( 'Cannot set selection on treeChannels', sender = self)
        self.on_treeChannels_cursor_changed( self.treeChannels)
    
    def updateTreeView( self):
        if self.channels and self.active_channel is not None:
            self.treeAvailable.set_model(self.active_channel.tree_model)
            self.treeAvailable.columns_autosize()
            self.play_or_download()
        else:
            if self.treeAvailable.get_model():
                self.treeAvailable.get_model().clear()
    
    def drag_data_received(self, widget, context, x, y, sel, ttype, time):
        result = sel.data
        self.add_new_channel( result)

    def add_new_channel(self, result=None, ask_download_new=True):
        result = util.normalize_feed_url( result)

        if result:
            for old_channel in self.channels:
                if old_channel.url == result:
                    log( 'Channel already exists: %s', result)
                    # Select the existing channel in combo box
                    for i in range( len( self.channels)):
                        if self.channels[i] == old_channel:
                            self.treeChannels.get_selection().select_path( (i,))
                            self.on_treeChannels_cursor_changed(self.treeChannels)
                            break
                    self.show_message( _('You have already subscribed to this podcast: %s') % ( saxutils.escape( old_channel.title), ), _('Already added'))
                    return
            log( 'Adding new channel: %s', result)
            try:
                channel = podcastChannel.get_by_url( url = result, force_update = True)
            except:
                log('Error in podcastChannel.get_by_url(%s)', result, sender=self)
                channel = None

            if channel:
                self.channels.append( channel)
                save_channels( self.channels)
                # download changed channels and select the new episode in the UI afterwards
                self.update_feed_cache(force_update=False, select_url_afterwards=channel.url)

                (username, password) = util.username_password_from_url( result)
                if username and self.show_confirmation( _('You have supplied <b>%s</b> as username and a password for this feed. Would you like to use the same authentication data for downloading episodes?') % ( saxutils.escape( username), ), _('Password authentication')):
                    channel.username = username
                    channel.password = password
                    log('Saving authentication data for episode downloads..', sender = self)
                    channel.save_settings()

                if ask_download_new:
                    new_episodes = channel.get_new_episodes()
                    if len(new_episodes):
                        self.new_episodes_show(new_episodes)
            else:
                title = _('Error adding podcast')
                message = _('The podcast could not be added. Please check the spelling of the URL or try again later.')
                self.show_message( message, title)
        else:
            if result:
                title = _('URL scheme not supported')
                message = _('gPodder currently only supports URLs starting with <b>http://</b>, <b>feed://</b> or <b>ftp://</b>.')
                self.show_message( message, title)
            else:
                self.show_message(_('There has been an error adding this podcast. Please see the log output for more information.'), _('Error adding podcast'))
    
    def update_feed_cache_callback(self, progressbar, position, count, force_update):
        title = self.channels[position].title
        if force_update:
            progression = _('Updating %s (%d/%d)')%(title, position+1, count)
        else:
            progression = _('Loading %s (%d/%d)')%(title, position+1, count)
        progressbar.set_text(progression)
        if self.tray_icon:
            self.tray_icon.set_status(self.tray_icon.STATUS_UPDATING_FEED_CACHE, progression)

        if count > 0:
            progressbar.set_fraction(float(position)/float(count))

    def update_feed_cache_finish_callback(self, force_update=False, notify_no_new_episodes=False, select_url_afterwards=None):
        self.hboxUpdateFeeds.hide_all()
        self.btnUpdateFeeds.show_all()

        # If we want to select a specific podcast (via its URL)
        # after the update, we give it to updateComboBox here to
        # select exactly this podcast after updating the view
        self.updateComboBox(selected_url=select_url_afterwards)

        if self.tray_icon:
            self.tray_icon.set_status(None)
            if self.minimized and force_update:
                new_episodes = []
                # look for new episodes to notify
                for channel in self.channels:
                    for episode in channel.get_new_episodes():
                        if not episode in self.already_notified_new_episodes:
                            new_episodes.append(episode)
                            self.already_notified_new_episodes.append(episode)
                # notify new episodes
                                
                if len(new_episodes) == 0:
                    if notify_no_new_episodes and self.tray_icon is not None:
                        msg = _('No new episodes available for download')
                        self.tray_icon.send_notification(msg)                        
                    return
                elif len(new_episodes) == 1:
                    title = _('gPodder has found %s') % (_('one new episode:'),)
                else:    
                    title = _('gPodder has found %s') % (_('%i new episodes:') % len(new_episodes))
                message = self.tray_icon.format_episode_list(new_episodes)

                #auto download new episodes
                if gl.config.auto_download_when_minimized:
                    message += '\n<i>(%s...)</i>' % _('downloading')
                    self.download_episode_list(new_episodes)
                self.tray_icon.send_notification(message, title)
                return

        # open the episodes selection dialog
        if force_update:
            self.on_itemDownloadAllNew_activate( self.gPodder)

    def update_feed_cache_proc( self, force_update, callback_proc = None, callback_error = None, finish_proc = None):
        is_cancelled_cb = lambda: self.feed_cache_update_cancelled
        self.channels = load_channels(force_update=force_update, callback_proc=callback_proc, callback_error=callback_error, offline=not force_update, is_cancelled_cb=is_cancelled_cb, old_channels=self.channels)
        if finish_proc:
            finish_proc()

    def on_btnCancelFeedUpdate_clicked(self, widget):
        self.pbFeedUpdate.set_text(_('Cancelling...'))
        self.feed_cache_update_cancelled = True

    def update_feed_cache(self, force_update=True, notify_no_new_episodes=False, select_url_afterwards=None):
        if self.tray_icon:
            self.tray_icon.set_status(self.tray_icon.STATUS_UPDATING_FEED_CACHE)

        # let's get down to business..
        callback_proc = lambda pos, count: util.idle_add(self.update_feed_cache_callback, self.pbFeedUpdate, pos, count, force_update)
        finish_proc = lambda: util.idle_add(self.update_feed_cache_finish_callback, force_update, notify_no_new_episodes, select_url_afterwards)

        self.feed_cache_update_cancelled = False
        self.btnUpdateFeeds.hide_all()
        self.hboxUpdateFeeds.show_all()

        args = (force_update, callback_proc, self.notification, finish_proc)

        thread = Thread( target = self.update_feed_cache_proc, args = args)
        thread.start()
        
    def download_podcast_by_url( self, url, want_message_dialog = True, widget = None):
        if self.active_channel is None:
            return

        current_channel = self.active_channel
        current_podcast = current_channel.find_episode( url)
        filename = current_podcast.local_filename()

        if widget:
            if (widget.get_name() == 'itemPlaySelected' or widget.get_name() == 'toolPlay') and os.path.exists( filename):
                # addDownloadedItem just to make sure the episode is marked correctly in localdb
                current_channel.addDownloadedItem( current_podcast)
                # open the file now
                if current_podcast.file_type() != 'torrent':
                    self.playback_episode( current_channel, current_podcast)
                return
         
            if widget.get_name() == 'treeAvailable' or widget.get_name() == 'item_episode_details':
                play_callback = lambda: self.playback_episode( current_channel, current_podcast)
                download_callback = lambda: self.download_podcast_by_url( url, want_message_dialog, None)
                gpe = gPodderEpisode( episode = current_podcast, channel = current_channel, download_callback = download_callback, play_callback = play_callback)
                return
        
        if not os.path.exists( filename) and not services.download_status_manager.is_download_in_progress( current_podcast.url):
            download.DownloadThread( current_channel, current_podcast, self.notification).start()
        else:
            if want_message_dialog and os.path.exists( filename) and not current_podcast.file_type() == 'torrent':
                title = _('Episode already downloaded')
                message = _('You have already downloaded this episode. Click on the episode to play it.')
                self.show_message( message, title)
            elif want_message_dialog and not current_podcast.file_type() == 'torrent':
                title = _('Download in progress')
                message = _('You are currently downloading this episode. Please check the download status tab to check when the download is finished.')
                self.show_message( message, title)

            if os.path.exists( filename):
                log( 'Episode has already been downloaded.')
                current_channel.addDownloadedItem( current_podcast)
                self.updateComboBox()
                
    def on_gPodder_delete_event(self, widget, *args):
        """Called when the GUI wants to close the window
        Displays a confirmation dialog (and closes/hides gPodder)
        """

        downloading = services.download_status_manager.has_items()

        # Only iconify if we are using the window's "X" button,
        # but not when we are using "Quit" in the menu or toolbar
        if not gl.config.on_quit_ask and gl.config.on_quit_systray and self.tray_icon and widget.name not in ('toolQuit', 'itemQuit'):
            self.iconify_main_window()
        elif gl.config.on_quit_ask or downloading:
            if gpodder.interface == gpodder.MAEMO:
                result = self.show_confirmation(_('Do you really want to quit gPodder now?'))
                if result:
                    self.close_gpodder()
                else:
                    return True
            dialog = gtk.MessageDialog(self.gPodder, gtk.DIALOG_MODAL, gtk.MESSAGE_QUESTION, gtk.BUTTONS_NONE)
            dialog.add_button(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
            dialog.add_button(gtk.STOCK_QUIT, gtk.RESPONSE_CLOSE)

            title = _('Quit gPodder')
            if downloading:
                message = _('You are downloading episodes. If you close gPodder now, the downloads will be aborted.')
            else:
                message = _('Do you really want to quit gPodder now?')

            dialog.set_title(title)
            dialog.set_markup('<span weight="bold" size="larger">%s</span>\n\n%s'%(title, message))
            if not downloading:
                cb_ask = gtk.CheckButton(_("Don't ask me again"))
                dialog.vbox.pack_start(cb_ask)
                cb_ask.show_all()

            result = dialog.run()
            dialog.destroy()

            if result == gtk.RESPONSE_CLOSE:
                if not downloading and cb_ask.get_active() == True:
                    gl.config.on_quit_ask = False
                self.close_gpodder()
        else:
            self.close_gpodder()

        return True

    def close_gpodder(self):
        """ clean everything and exit properly
        """
        if self.channels:
            if not save_channels(self.channels):
                self.show_message(_('Please check your permissions and free disk space.'), _('Error saving podcast list'))

        services.download_status_manager.cancel_all()

        self.gtk_main_quit()
        sys.exit( 0)

    def get_old_episodes(self):
        episodes = []
        for channel in self.channels:
            for episode in channel.get_all_episodes():
                if episode.is_downloaded() and episode.is_old() and not episode.is_locked() and episode.is_played():
                    episodes.append(episode)
        return episodes

    def for_each_selected_episode_url( self, callback):
        ( model, paths ) = self.treeAvailable.get_selection().get_selected_rows()
        for path in paths:
            url = model.get_value( model.get_iter( path), 0)
            try:
                callback( url)
            except:
                log( 'Warning: Error in for_each_selected_episode_url for URL %s', url, sender = self)
        self.active_channel.update_model()
        self.updateComboBox()

    def delete_episode_list( self, episodes, confirm = True):
        if len(episodes) == 0:
            return
        
        if len(episodes) == 1:
            message = _('Do you really want to delete this episode?')
        else:
            message = _('Do you really want to delete %d episodes?') % len(episodes)

        if confirm and self.show_confirmation( message, _('Delete episodes')) == False:
            return

        for episode in episodes:
            log('Deleting episode: %s', episode.title, sender = self)
            episode.delete_from_disk()

        self.download_status_updated()

    def on_itemRemoveOldEpisodes_activate( self, widget):
        columns = (
                ('title', _('Episode')),
                ('channel_prop', _('Podcast')),
                ('filesize_prop', _('Size')),
                ('pubdate_prop', _('Released')),
                ('played_prop', _('Status')),
                ('age_prop', _('Downloaded')),
        )

        selection_buttons = {
                _('Select played'): lambda episode: episode.is_played(),
                _('Select older than %d days') % gl.config.episode_old_age: lambda episode: episode.is_old(),
        }

        instructions = _('Select the episodes you want to delete from your hard disk.')

        episodes = []
        selected = []
        for channel in self.channels:
            for episode in channel:
                if episode.is_downloaded() and not episode.is_locked():
                    episodes.append( episode)
                    selected.append( episode.is_played())

        gPodderEpisodeSelector( title = _('Remove old episodes'), instructions = instructions, \
                                episodes = episodes, selected = selected, columns = columns, \
                                stock_ok_button = gtk.STOCK_DELETE, callback = self.delete_episode_list, \
                                selection_buttons = selection_buttons)

    def on_item_toggle_downloaded_activate( self, widget, toggle = True, new_value = False):
        if toggle:
            callback = lambda url: gl.history_mark_downloaded(url, not gl.history_is_downloaded(url))
        else:
            callback = lambda url: gl.history_mark_downloaded(url, new_value)

        self.for_each_selected_episode_url( callback)

        if self.active_channel:
            # Reset the cache for newest_pubdate_downloaded
            self.active_channel.reset_pubdate_cache()

    def on_item_toggle_played_activate( self, widget, toggle = True, new_value = False):
        if toggle:
            callback = lambda url: gl.history_mark_played(url, not gl.history_is_played(url))
        else:
            callback = lambda url: gl.history_mark_played(url, new_value)

        self.for_each_selected_episode_url( callback)

    def on_item_toggle_lock_activate(self, widget, toggle=True, new_value=False):
        if toggle:
            callback = lambda url: gl.history_mark_locked(url, not gl.history_is_locked(url))
        else:
            callback = lambda url: gl.history_mark_locked(url, new_value)

        self.for_each_selected_episode_url(callback)

    def on_item_email_subscriptions_activate(self, widget):
        if not self.channels:
            self.show_message(_('Your subscription list is empty.'), _('Could not send list'))
        elif not gl.send_subscriptions():
            self.show_message(_('There was an error sending your subscription list via e-mail.'), _('Could not send list'))

    def on_item_show_url_entry_activate(self, widget):
        gl.config.show_podcast_url_entry = self.item_show_url_entry.get_active()

    def on_itemUpdate_activate(self, widget, notify_no_new_episodes=False):
        if self.channels:
            self.update_feed_cache(notify_no_new_episodes=notify_no_new_episodes)
        else:
            title = _('Import podcasts from the web')
            message = _('Your podcast list is empty. Do you want to see a list of example podcasts you can subscribe to?')
            if self.show_confirmation(message, title):
                self.on_itemImportChannels_activate(self, widget)

    def download_episode_list( self, episodes):
        services.download_status_manager.start_batch_mode()
        for episode in episodes:
            log('Downloading episode: %s', episode.title, sender = self)
            filename = episode.local_filename()
            if not os.path.exists( filename) and not services.download_status_manager.is_download_in_progress( episode.url):
                download.DownloadThread( episode.channel, episode, self.notification).start()
        services.download_status_manager.end_batch_mode()

    def new_episodes_show(self, episodes):
        columns = (
                ('title', _('Episode')),
                ('channel_prop', _('Podcast')),
                ('filesize_prop', _('Size')),
                ('pubdate_prop', _('Released')),
        )

        if len(episodes) > 0:
            instructions = _('Select the episodes you want to download now.')

            gPodderEpisodeSelector(title=_('New episodes available'), instructions=instructions, \
                                   episodes=episodes, columns=columns, selected_default=True, \
                                   callback=self.download_episode_list)
        else:
            title = _('No new episodes')
            message = _('No new episodes to download.\nPlease check for new episodes later.')
            self.show_message(message, title)

    def on_itemDownloadAllNew_activate(self, widget, *args):
        episodes = []
        for channel in self.channels:
            for episode in channel.get_new_episodes():
                episodes.append(episode)
        self.new_episodes_show(episodes)

    def get_all_episodes(self, exclude_nonsignificant=True ):
        """'exclude_nonsignificant' will exclude non-downloaded episodes
            and all episodes from channels that are set to skip when syncing"""
        episode_list = []
        for channel in self.channels:
            if not channel.sync_to_devices and exclude_nonsignificant:
                log('Skipping channel: %s', channel.title, sender=self)
                continue
            for episode in channel.get_all_episodes():
                if episode.is_downloaded() or not exclude_nonsignificant:
                    episode_list.append(episode)
        return episode_list

    def ipod_delete_played(self, device):
        all_episodes = self.get_all_episodes( exclude_nonsignificant=False )
        episodes_on_device = device.get_all_tracks()
        for local_episode in all_episodes:
            if local_episode.is_played() and not local_episode.is_locked() or local_episode.is_deleted():
                if gl.config.device_type == 'filesystem':
                    local_episode_name = util.sanitize_filename(local_episode.sync_filename(), gl.config.mp3_player_max_filename_length)
                else:
                    local_episode_name = local_episode.sync_filename()
                for device_episode in episodes_on_device:
                    if device_episode.title == local_episode_name:
                        log("mp3_player_delete_played: removing %s" % device_episode.title)
                        device.remove_track(device_episode)
                        break

    def on_sync_to_ipod_activate(self, widget, episodes=None):
        Thread(target=self.sync_to_ipod_thread, args=(widget, episodes)).start()
    
    def sync_to_ipod_thread(self, widget, episodes=None):
        device = sync.open_device()

        if device is None:
            title = _('No device configured')
            message = _('To use the synchronization feature, please configure your device in the preferences dialog first.')
            self.notification(message, title)
            return

        if not device.open():
            title = _('Cannot open device')
            message = _('There has been an error opening your device.')
            self.notification(message, title)
            return

        gPodderSync(device=device, gPodder=self)
        if self.tray_icon:
            self.tray_icon.set_synchronisation_device(device)

        if episodes is None:
            episodes_to_sync = self.get_all_episodes()
            device.add_tracks(episodes_to_sync)
            # 'only_sync_not_played' must be used or else all the played
            #  tracks will be copied then immediately deleted
            if gl.config.mp3_player_delete_played and gl.config.only_sync_not_played:
                self.ipod_delete_played(device)
        else:
            device.add_tracks(episodes, force_played=True)
 
        if not device.close():
            title = _('Error closing device')
            message = _('There has been an error closing your device.')
            self.notification(message, title)
            return
 
        if self.tray_icon:
            self.tray_icon.release_synchronisation_device()

        # update model for played state updates after sync
        for channel in self.channels:
            util.idle_add(channel.update_model)
        util.idle_add(self.updateComboBox)

    def ipod_cleanup_callback(self, device, tracks):
        title = _('Delete podcasts from device?')
        message = _('Do you really want to completely remove the selected episodes?')
        if len(tracks) > 0 and self.show_confirmation(message, title):
            device.remove_tracks(tracks)
 
        if not device.close():
            title = _('Error closing device')
            message = _('There has been an error closing your device.')
            self.show_message(message, title)
            return

    def on_cleanup_ipod_activate(self, widget, *args):
        columns = (
                ('title', _('Episode')),
                ('podcast', _('Podcast')),
                ('filesize', _('Size')),
                ('modified', _('Copied')),
                ('playcount', _('Play count')),
                ('released', _('Released')),
        )

        device = sync.open_device()

        if device is None:
            title = _('No device configured')
            message = _('To use the synchronization feature, please configure your device in the preferences dialog first.')
            self.show_message(message, title)
            return

        if not device.open():
            title = _('Cannot open device')
            message = _('There has been an error opening your device.')
            self.show_message(message, title)
            return

        gPodderSync(device=device, gPodder=self)

        tracks = device.get_all_tracks()
        if len(tracks) > 0:
            remove_tracks_callback = lambda tracks: self.ipod_cleanup_callback(device, tracks)
            wanted_columns = []
            for key, caption in columns:
                want_this_column = False
                for track in tracks:
                    if getattr(track, key) is not None:
                        want_this_column = True
                        break

                if want_this_column:
                    wanted_columns.append((key, caption))
            title = _('Remove podcasts from device')
            instructions = _('Select the podcast episodes you want to remove from your device.')
            gPodderEpisodeSelector(title=title, instructions=instructions, episodes=tracks, columns=wanted_columns, \
                                   stock_ok_button=gtk.STOCK_DELETE, callback=remove_tracks_callback)
        else:
            title = _('No files on device')
            message = _('The devices contains no files to be removed.')
            self.show_message(message, title)

    def show_hide_tray_icon(self):
        if gl.config.display_tray_icon and have_trayicon and self.tray_icon is None:
            self.tray_icon = trayicon.GPodderStatusIcon(self, scalable_dir)
        elif not gl.config.display_tray_icon and self.tray_icon is not None:
            self.tray_icon.set_visible(False)
            del self.tray_icon
            self.tray_icon = None

        if gl.config.minimize_to_tray and self.tray_icon:
            self.tray_icon.set_visible(self.minimized)
        elif self.tray_icon:
            self.tray_icon.set_visible(True)

    def on_itemShowToolbar_activate(self, widget):
        gl.config.show_toolbar = self.itemShowToolbar.get_active()

    def on_itemShowDescription_activate(self, widget):
        gl.config.episode_list_descriptions = self.itemShowDescription.get_active()

    def update_item_device( self):
        if gl.config.device_type != 'none':
            self.itemDevice.show_all()
            (label,) = self.itemDevice.get_children()
            label.set_text(gl.get_device_name())
        else:
            self.itemDevice.hide_all()

    def properties_closed( self):
        self.show_hide_tray_icon()
        self.update_item_device()
        self.updateComboBox()

    def on_itemPreferences_activate(self, widget, *args):
        if gpodder.interface == gpodder.GUI:
            gPodderProperties(callback_finished=self.properties_closed, user_apps_reader=self.user_apps_reader)
        else:
            gPodderMaemoPreferences()

    def on_itemAddChannel_activate(self, widget, *args):
        if gpodder.interface == gpodder.MAEMO or not gl.config.show_podcast_url_entry:
            gPodderAddPodcastDialog(url_callback=self.add_new_channel)
        else:
            if self.channelPaned.get_position() < 200:
                self.channelPaned.set_position( 200)
            self.entryAddChannel.grab_focus()

    def on_itemEditChannel_activate(self, widget, *args):
        if self.active_channel is None:
            title = _('No podcast selected')
            message = _('Please select a podcast in the podcasts list to edit.')
            self.show_message( message, title)
            return

        gPodderChannel(channel=self.active_channel, callback_closed=self.updateComboBox, callback_change_url=self.change_channel_url)

    def change_channel_url(self, old_url, new_url):
        channel = None
        try:
            channel = podcastChannel.get_by_url(url=new_url, force_update=True)
        except:
            channel = None

        if channel is None:
            self.show_message(_('The specified URL is invalid. The old URL has been used instead.'), _('Invalid URL'))
            return

        for channel in self.channels:
            if channel.url == old_url:
                log('=> change channel url from %s to %s', old_url, new_url)
                old_save_dir = channel.save_dir
                channel.url = new_url
                new_save_dir = channel.save_dir
                log('old save dir=%s', old_save_dir, sender=self)
                log('new save dir=%s', new_save_dir, sender=self)
                files = glob.glob(os.path.join(old_save_dir, '*'))
                log('moving %d files to %s', len(files), new_save_dir, sender=self)
                for file in files:
                    log('moving %s', file, sender=self)
                    shutil.move(file, new_save_dir)
                try:
                    os.rmdir(old_save_dir)
                except:
                    log('Warning: cannot delete %s', old_save_dir, sender=self)

        save_channels(self.channels)
        # update feed cache and select the podcast with the new URL afterwards
        self.update_feed_cache(force_update=False, select_url_afterwards=new_url)

    def on_itemRemoveChannel_activate(self, widget, *args):
        try:
            if gpodder.interface == gpodder.GUI:
                dialog = gtk.MessageDialog(self.gPodder, gtk.DIALOG_MODAL, gtk.MESSAGE_QUESTION, gtk.BUTTONS_NONE)
                dialog.add_button(gtk.STOCK_NO, gtk.RESPONSE_NO)
                dialog.add_button(gtk.STOCK_YES, gtk.RESPONSE_YES)

                title = _('Remove podcast and episodes?')
                message = _('Do you really want to remove <b>%s</b> and all downloaded episodes?') % saxutils.escape(self.active_channel.title)
             
                dialog.set_title(title)
                dialog.set_markup('<span weight="bold" size="larger">%s</span>\n\n%s'%(title, message))
            
                cb_ask = gtk.CheckButton(_('Do not delete my downloaded episodes'))
                dialog.vbox.pack_start(cb_ask)
                cb_ask.show_all()
                affirmative = gtk.RESPONSE_YES
            elif gpodder.interface == gpodder.MAEMO:
                cb_ask = gtk.CheckButton('') # dummy check button
                dialog = hildon.Note('confirmation', (self.gPodder, _('Do you really want to remove this podcast and all downloaded episodes?')))
                affirmative = gtk.RESPONSE_OK

            result = dialog.run()
            dialog.destroy()

            if result == affirmative:
                # delete downloaded episodes only if checkbox is unchecked
                if cb_ask.get_active() == False:
                    self.active_channel.remove_downloaded()
                else:
                    log('Not removing downloaded episodes', sender=self)

                # only delete partial files if we do not have any downloads in progress
                delete_partial = not services.download_status_manager.has_items()
                gl.clean_up_downloads(delete_partial)

                # get the URL of the podcast we want to select next
                position = self.channels.index(self.active_channel)
                if position == len(self.channels)-1:
                    # this is the last podcast, so select the URL
                    # of the item before this one (i.e. the "new last")
                    select_url = self.channels[position-1].url
                else:
                    # there is a podcast after the deleted one, so
                    # we simply select the one that comes after it
                    select_url = self.channels[position+1].url
                
                # Remove the channel
                self.channels.remove(self.active_channel)
                save_channels(self.channels)

                # Re-load the channels and select the desired new channel
                self.update_feed_cache(force_update=False, select_url_afterwards=select_url)
        except:
            log('There has been an error removing the channel.', traceback=True, sender=self)

    def get_opml_filter(self):
        filter = gtk.FileFilter()
        filter.add_pattern('*.opml')
        filter.add_pattern('*.xml')
        filter.set_name(_('OPML files')+' (*.opml, *.xml)')
        return filter

    def on_item_import_from_file_activate(self, widget):
        if gpodder.interface == gpodder.GUI:
            dlg = gtk.FileChooserDialog(title=_('Import from OPML'), parent=None, action=gtk.FILE_CHOOSER_ACTION_OPEN)
            dlg.add_button(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
            dlg.add_button(gtk.STOCK_OPEN, gtk.RESPONSE_OK)
        elif gpodder.interface == gpodder.MAEMO:
            dlg = hildon.FileChooserDialog(self.gPodder, gtk.FILE_CHOOSER_ACTION_OPEN)
        dlg.set_filter(self.get_opml_filter())
        response = dlg.run()
        filename = None
        if response == gtk.RESPONSE_OK:
            filename = dlg.get_filename()
        dlg.destroy()
        if filename is not None:
            gPodderOpmlLister(custom_title=_('Import podcasts from OPML file'), hide_url_entry=True).get_channels_from_url(filename, lambda url: self.add_new_channel(url,False), lambda: self.on_itemDownloadAllNew_activate(self.gPodder))

    def on_itemExportChannels_activate(self, widget, *args):
        if not self.channels:
            title = _('Nothing to export')
            message = _('Your list of podcast subscriptions is empty. Please subscribe to some podcasts first before trying to export your subscription list.')
            self.show_message( message, title)
            return

        if gpodder.interface == gpodder.GUI:
            dlg = gtk.FileChooserDialog(title=_('Export to OPML'), parent=self.gPodder, action=gtk.FILE_CHOOSER_ACTION_SAVE)
            dlg.add_button(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
            dlg.add_button(gtk.STOCK_SAVE, gtk.RESPONSE_OK)
        elif gpodder.interface == gpodder.MAEMO:
            dlg = hildon.FileChooserDialog(self.gPodder, gtk.FILE_CHOOSER_ACTION_SAVE)
        dlg.set_filter(self.get_opml_filter())
        response = dlg.run()
        if response == gtk.RESPONSE_OK:
            filename = dlg.get_filename()
            exporter = opml.Exporter( filename)
            if not exporter.write( self.channels):
                self.show_message( _('Could not export OPML to file. Please check your permissions.'), _('OPML export failed'))

        dlg.destroy()

    def on_itemImportChannels_activate(self, widget, *args):
        gPodderOpmlLister().get_channels_from_url(gl.config.opml_url, lambda url: self.add_new_channel(url,False), lambda: self.on_itemDownloadAllNew_activate(self.gPodder))

    def on_btnTransfer_clicked(self, widget, *args):
        self.on_treeAvailable_row_activated( widget, args)

    def on_homepage_activate(self, widget, *args):
        util.open_website(app_website)

    def on_wiki_activate(self, widget, *args):
        util.open_website('http://wiki.gpodder.org/')

    def on_bug_tracker_activate(self, widget, *args):
        util.open_website('http://bugs.gpodder.org/')

    def on_itemAbout_activate(self, widget, *args):
        dlg = gtk.AboutDialog()
        dlg.set_name(app_name.replace('p', 'P')) # gpodder->gPodder
        dlg.set_version( app_version)
        dlg.set_copyright( app_copyright)
        dlg.set_website( app_website)
        dlg.set_translator_credits( _('translator-credits'))
        dlg.connect( 'response', lambda dlg, response: dlg.destroy())

        if gpodder.interface == gpodder.GUI:
            # For the "GUI" version, we add some more
            # items to the about dialog (credits and logo)
            dlg.set_authors(app_authors)
            try:
                dlg.set_logo(gtk.gdk.pixbuf_new_from_file_at_size(scalable_dir, 200, 200))
            except:
                pass
        
        dlg.run()

    def on_wNotebook_switch_page(self, widget, *args):
        page_num = args[1]
        if gpodder.interface == gpodder.MAEMO:
            page = self.wNotebook.get_nth_page(page_num)
            tab_label = self.wNotebook.get_tab_label(page).get_text()
            if page_num == 0 and self.active_channel is not None:
                self.set_title(self.active_channel.title)
            else:
                self.set_title(tab_label)
        if page_num == 0:
            self.play_or_download()
        else:
            self.toolDownload.set_sensitive( False)
            self.toolPlay.set_sensitive( False)
            self.toolTransfer.set_sensitive( False)
            self.toolCancel.set_sensitive( services.download_status_manager.has_items())

    def on_treeChannels_row_activated(self, widget, *args):
        self.on_itemEditChannel_activate( self.treeChannels)

    def on_treeChannels_cursor_changed(self, widget, *args):
        ( model, iter ) = self.treeChannels.get_selection().get_selected()

        if model is not None and iter != None:
            id = model.get_path( iter)[0]
            self.active_channel = self.channels[id]

            if gpodder.interface == gpodder.MAEMO:
                self.set_title(self.active_channel.title)
            self.itemEditChannel.show_all()
            self.itemRemoveChannel.show_all()
        else:
            self.active_channel = None
            self.itemEditChannel.hide_all()
            self.itemRemoveChannel.hide_all()

        self.updateTreeView()

    def on_entryAddChannel_changed(self, widget, *args):
        active = self.entryAddChannel.get_text() not in ('', self.ENTER_URL_TEXT)
        self.btnAddChannel.set_sensitive( active)

    def on_btnAddChannel_clicked(self, widget, *args):
        url = self.entryAddChannel.get_text()
        self.entryAddChannel.set_text('')
        self.add_new_channel( url)

    def on_btnEditChannel_clicked(self, widget, *args):
        self.on_itemEditChannel_activate( widget, args)

    def on_treeAvailable_row_activated(self, widget, *args):
        try:
            selection = self.treeAvailable.get_selection()
            selection_tuple = selection.get_selected_rows()
            transfer_files = False
            episodes = []

            if selection.count_selected_rows() > 1:
                widget_to_send = None
                show_message_dialog = False
            else:
                widget_to_send = widget
                show_message_dialog = True

            if widget.get_name() == 'itemTransferSelected' or widget.get_name() == 'toolTransfer':
                transfer_files = True

            services.download_status_manager.start_batch_mode()
            for apath in selection_tuple[1]:
                selection_iter = self.treeAvailable.get_model().get_iter( apath)
                url = self.treeAvailable.get_model().get_value( selection_iter, 0)

                if transfer_files:
                    episodes.append( self.active_channel.find_episode( url))
                else:
                    self.download_podcast_by_url( url, show_message_dialog, widget_to_send)
            services.download_status_manager.end_batch_mode()

            if transfer_files and len(episodes):
                self.on_sync_to_ipod_activate(None, episodes)
        except:
            title = _('Nothing selected')
            message = _('Please select an episode that you want to download and then click on the download button to start downloading the selected episode.')
            self.show_message( message, title)

    def on_btnDownload_clicked(self, widget, *args):
        self.on_treeAvailable_row_activated( widget, args)

    def on_treeAvailable_button_release_event(self, widget, *args):
        self.play_or_download()

    def auto_update_procedure(self, first_run=False):
        log('auto_update_procedure() got called', sender=self)
        if not first_run and gl.config.auto_update_feeds and self.minimized:
            self.update_feed_cache()

        next_update = 60*1000*gl.config.auto_update_frequency
        gobject.timeout_add(next_update, self.auto_update_procedure)

    def on_treeDownloads_row_activated(self, widget, *args):
        cancel_urls = []

        if self.wNotebook.get_current_page() > 0:
            # Use the download list treeview + model
            ( tree, column ) = ( self.treeDownloads, 3 )
        else:
            # Use the available podcasts treeview + model
            ( tree, column ) = ( self.treeAvailable, 0 )

        selection = tree.get_selection()
        (model, paths) = selection.get_selected_rows()
        for path in paths:
            url = model.get_value( model.get_iter( path), column)
            cancel_urls.append( url)

        if len( cancel_urls) == 0:
            log('Nothing selected.', sender = self)
            return

        if len( cancel_urls) == 1:
            title = _('Cancel download?')
            message = _("Cancelling this download will remove the partially downloaded file and stop the download.")
        else:
            title = _('Cancel downloads?')
            message = _("Cancelling the download will stop the %d selected downloads and remove partially downloaded files.") % selection.count_selected_rows()

        if self.show_confirmation( message, title):
            services.download_status_manager.start_batch_mode()
            for url in cancel_urls:
                services.download_status_manager.cancel_by_url( url)
            services.download_status_manager.end_batch_mode()

    def on_btnCancelDownloadStatus_clicked(self, widget, *args):
        self.on_treeDownloads_row_activated( widget, None)

    def on_btnCancelAll_clicked(self, widget, *args):
        self.treeDownloads.get_selection().select_all()
        self.on_treeDownloads_row_activated( self.toolCancel, None)
        self.treeDownloads.get_selection().unselect_all()

    def on_btnDownloadedExecute_clicked(self, widget, *args):
        self.on_treeAvailable_row_activated( widget, args)

    def on_btnDownloadedDelete_clicked(self, widget, *args):
        if self.active_channel is None:
            return

        channel_url = self.active_channel.url
        selection = self.treeAvailable.get_selection()
        ( model, paths ) = selection.get_selected_rows()
        
        if selection.count_selected_rows() == 0:
            log( 'Nothing selected - will not remove any downloaded episode.')
            return

        if selection.count_selected_rows() == 1:
            episode_title = saxutils.escape(model.get_value(model.get_iter(paths[0]), 1))

            locked = gl.history_is_locked(model.get_value(model.get_iter(paths[0]), 0))
            if locked:
                title = _('%s is locked') % episode_title
                message = _('You cannot delete this locked episode. You must unlock it before you can delete it.')
                self.notification(message, title)
                return

            title = _('Remove %s?') % episode_title
            message = _("If you remove this episode, it will be deleted from your computer. If you want to listen to this episode again, you will have to re-download it.")
        else:
            title = _('Remove %d episodes?') % selection.count_selected_rows()
            message = _('If you remove these episodes, they will be deleted from your computer. If you want to listen to any of these episodes again, you will have to re-download the episodes in question.')

        locked_count = 0
        for path in paths:
            url = model.get_value(model.get_iter(path), 0)
            if gl.history_is_locked(url):
                locked_count += 1

        if selection.count_selected_rows() == locked_count:
            title = _('Episodes are locked')
            message = _('The selected episodes are locked. Please unlock the episodes that you want to delete before trying to delete them.')
            self.notification(message, title)
            return
        elif locked_count > 0:
            title = _('Remove %d out of %d episodes?') % (selection.count_selected_rows() - locked_count, selection.count_selected_rows())
            message = _('The selection contains locked episodes. These will not be deleted. If you want to listen to any of these episodes again, then you will have to re-download them.')
            
        # if user confirms deletion, let's remove some stuff ;)
        if self.show_confirmation( message, title):
            try:
                # iterate over the selection, see also on_treeDownloads_row_activated
                for path in paths:
                    url = model.get_value( model.get_iter( path), 0)
                    self.active_channel.delete_episode_by_url( url)
                    gl.history_mark_downloaded(url)
      
                # now, clear local db cache so we can re-read it
                self.updateComboBox()
            except:
                log( 'Error while deleting (some) downloads.')

        # only delete partial files if we do not have any downloads in progress
        delete_partial = not services.download_status_manager.has_items()
        gl.clean_up_downloads(delete_partial)
        self.active_channel.force_update_tree_model()
        self.updateTreeView()

    def on_key_press(self, widget, event):
        # Currently, we only handle Maemo hardware keys here,
        # so if we are not a Maemo app, we don't do anything!
        if gpodder.interface != gpodder.MAEMO:
            return
        
        if event.keyval == gtk.keysyms.F6:
            if self.fullscreen:
                self.window.unfullscreen()
            else:
                self.window.fullscreen()
        if event.keyval == gtk.keysyms.Escape:
            new_visibility = not self.vboxChannelNavigator.get_property('visible')
            self.vboxChannelNavigator.set_property('visible', new_visibility)
            self.column_size.set_visible(not new_visibility)
            self.column_released.set_visible(not new_visibility)
        
        diff = 0
        if event.keyval == gtk.keysyms.F7: #plus
            diff = 1
        elif event.keyval == gtk.keysyms.F8: #minus
            diff = -1

        if diff != 0:
            selection = self.treeChannels.get_selection()
            (model, iter) = selection.get_selected()
            selection.select_path(((model.get_path(iter)[0]+diff)%len(model),))
            self.on_treeChannels_cursor_changed(self.treeChannels)
        
    def window_state_event(self, widget, event):
        if event.new_window_state & gtk.gdk.WINDOW_STATE_FULLSCREEN:
            self.fullscreen = True
        else:
            self.fullscreen = False
            
        old_minimized = self.minimized

        if event.new_window_state & gtk.gdk.WINDOW_STATE_ICONIFIED:
            self.minimized = True
        else:
            self.minimized = False

        if old_minimized != self.minimized and self.tray_icon:
            self.gPodder.set_skip_taskbar_hint(self.minimized)
        elif not self.tray_icon:
            self.gPodder.set_skip_taskbar_hint(False)

        if gl.config.minimize_to_tray and self.tray_icon:
            self.tray_icon.set_visible(self.minimized)
    
    def uniconify_main_window(self):
        if self.minimized:
            self.gPodder.present()
 
    def iconify_main_window(self):
        if not self.minimized:
            self.gPodder.iconify()           

class gPodderChannel(GladeWidget):
    finger_friendly_widgets = ['btn_website', 'btnOK', 'channel_description']
    
    def new(self):
        global WEB_BROWSER_ICON
        self.image3167.set_property('icon-name', WEB_BROWSER_ICON)
        self.gPodderChannel.set_title( self.channel.title)
        self.entryTitle.set_text( self.channel.title)
        self.entryURL.set_text( self.channel.url)

        self.LabelDownloadTo.set_text( self.channel.save_dir)
        self.LabelWebsite.set_text( self.channel.link)

        self.channel.load_settings()
        self.cbNoSync.set_active( not self.channel.sync_to_devices)
        self.musicPlaylist.set_text(self.channel.device_playlist_name)
        if self.channel.username:
            self.FeedUsername.set_text( self.channel.username)
        if self.channel.password:
            self.FeedPassword.set_text( self.channel.password)

        self.on_btnClearCover_clicked( self.btnClearCover, delete_file = False)
        self.on_btnDownloadCover_clicked( self.btnDownloadCover, url = False)

        # Hide the website button if we don't have a valid URL
        if not self.channel.link:
            self.btn_website.hide_all()
        
        b = gtk.TextBuffer()
        b.set_text( self.channel.description)
        self.channel_description.set_buffer( b)

        #Add Drag and Drop Support
        flags = gtk.DEST_DEFAULT_ALL
        targets = [ ('text/uri-list', 0, 2), ('text/plain', 0, 4) ]
        actions = gtk.gdk.ACTION_DEFAULT | gtk.gdk.ACTION_COPY
        self.vboxCoverEditor.drag_dest_set( flags, targets, actions)
        self.vboxCoverEditor.connect( 'drag_data_received', self.drag_data_received)

    def on_btn_website_clicked(self, widget):
        util.open_website(self.channel.link)

    def on_btnClearCover_clicked( self, widget, delete_file = True):
        self.imgCover.clear()
        if delete_file:
            util.delete_file( self.channel.cover_file)
        self.btnClearCover.set_sensitive( os.path.exists( self.channel.cover_file))
        self.btnDownloadCover.set_sensitive( not os.path.exists( self.channel.cover_file) and bool(self.channel.image))
        self.labelCoverStatus.set_text( _('You can drag a cover file here.'))
        self.labelCoverStatus.show()

    def on_btnDownloadCover_clicked( self, widget, url = None):
        if url is None:
            url = self.channel.image

        if url != False:
            self.btnDownloadCover.set_sensitive( False)

        self.labelCoverStatus.show()
        gl.get_image_from_url(url, self.imgCover.set_from_pixbuf, self.labelCoverStatus.set_text, self.cover_download_finished, self.channel.cover_file)

    def cover_download_finished( self):
        self.labelCoverStatus.hide()
        self.btnClearCover.set_sensitive( os.path.exists( self.channel.cover_file))
        self.btnDownloadCover.set_sensitive( not os.path.exists( self.channel.cover_file) and bool(self.channel.image))

    def drag_data_received( self, widget, content, x, y, sel, ttype, time):
        files = sel.data.strip().split('\n')
        if len(files) != 1:
            self.show_message( _('You can only drop a single image or URL here.'), _('Drag and drop'))
            return

        file = files[0]

        if file.startswith( 'file://') or file.startswith( 'http://'):
            self.on_btnClearCover_clicked( self.btnClearCover)
            if file.startswith( 'file://'):
                filename = file[len('file://'):]
                shutil.copyfile( filename, self.channel.cover_file)
            self.on_btnDownloadCover_clicked( self.btnDownloadCover, url = file)
            return
        
        self.show_message( _('You can only drop local files and http:// URLs here.'), _('Drag and drop'))

    def on_gPodderChannel_destroy(self, widget, *args):
        self.callback_closed()

    def on_btnOK_clicked(self, widget, *args):
        entered_url = self.entryURL.get_text()
        channel_url = self.channel.url

        if entered_url != channel_url:
            if self.show_confirmation(_('Do you really want to move this podcast to <b>%s</b>?') % (saxutils.escape(entered_url),), _('Really change URL?')):
                if hasattr(self, 'callback_change_url'):
                    self.gPodderChannel.hide_all()
                    self.callback_change_url(channel_url, entered_url)

        self.channel.sync_to_devices = not self.cbNoSync.get_active()
        self.channel.device_playlist_name = self.musicPlaylist.get_text()
        self.channel.set_custom_title( self.entryTitle.get_text())
        self.channel.username = self.FeedUsername.get_text().strip()
        self.channel.password = self.FeedPassword.get_text()
        self.channel.save_settings()

        self.gPodderChannel.destroy()

class gPodderAddPodcastDialog(GladeWidget):
    finger_friendly_widgets = ['btn_close', 'btn_add']

    def new(self):
        if not hasattr(self, 'url_callback'):
            log('No url callback set', sender=self)
            self.url_callback = None

    def on_btn_close_clicked(self, widget):
        self.gPodderAddPodcastDialog.destroy()

    def on_entry_url_changed(self, widget):
        self.btn_add.set_sensitive(self.entry_url.get_text().strip() != '')

    def on_btn_add_clicked(self, widget):
        url = self.entry_url.get_text()
        self.on_btn_close_clicked(widget)
        if self.url_callback is not None:
            self.url_callback(url)
        

class gPodderMaemoPreferences(GladeWidget):
    finger_friendly_widgets = ['btn_close', 'label128', 'label129', 'btn_advanced']
    
    def new(self):
        gl.config.connect_gtk_togglebutton('update_on_startup', self.update_on_startup)
        gl.config.connect_gtk_togglebutton('display_tray_icon', self.show_tray_icon)
        gl.config.connect_gtk_togglebutton('enable_notifications', self.show_notifications)
        gl.config.connect_gtk_togglebutton('on_quit_ask', self.on_quit_ask)

        self.restart_required = False
        self.show_tray_icon.connect('clicked', self.on_restart_required)
        self.show_notifications.connect('clicked', self.on_restart_required)

    def on_restart_required(self, widget):
        self.restart_required = True

    def on_btn_advanced_clicked(self, widget):
        self.gPodderMaemoPreferences.destroy()
        gPodderConfigEditor()

    def on_btn_close_clicked(self, widget):
        self.gPodderMaemoPreferences.destroy()
        if self.restart_required:
            self.show_message(_('Please restart gPodder for the changes to take effect.'))


class gPodderProperties(GladeWidget):
    def new(self):
        if not hasattr( self, 'callback_finished'):
            self.callback_finished = None

        if gpodder.interface == gpodder.MAEMO:
            self.table13.hide_all() # bluetooth
            self.table5.hide_all() # player
            self.table6.hide_all() # bittorrent
            self.gPodderProperties.fullscreen()

        gl.config.connect_gtk_editable( 'http_proxy', self.httpProxy)
        gl.config.connect_gtk_editable( 'ftp_proxy', self.ftpProxy)
        gl.config.connect_gtk_editable( 'player', self.openApp)
        gl.config.connect_gtk_editable('videoplayer', self.openVideoApp)
        gl.config.connect_gtk_editable( 'custom_sync_name', self.entryCustomSyncName)
        gl.config.connect_gtk_togglebutton( 'custom_sync_name_enabled', self.cbCustomSyncName)
        gl.config.connect_gtk_togglebutton( 'auto_download_when_minimized', self.downloadnew)
        gl.config.connect_gtk_togglebutton( 'use_gnome_bittorrent', self.radio_gnome_bittorrent)
        gl.config.connect_gtk_togglebutton( 'update_on_startup', self.updateonstartup)
        gl.config.connect_gtk_togglebutton( 'only_sync_not_played', self.only_sync_not_played)
        gl.config.connect_gtk_togglebutton( 'fssync_channel_subfolders', self.cbChannelSubfolder)
        gl.config.connect_gtk_togglebutton( 'on_sync_mark_played', self.on_sync_mark_played)
        gl.config.connect_gtk_togglebutton( 'on_sync_delete', self.on_sync_delete)
        gl.config.connect_gtk_togglebutton( 'proxy_use_environment', self.cbEnvironmentVariables)
        gl.config.connect_gtk_filechooser( 'bittorrent_dir', self.chooserBitTorrentTo)
        gl.config.connect_gtk_spinbutton('episode_old_age', self.episode_old_age)
        gl.config.connect_gtk_togglebutton('auto_remove_old_episodes', self.auto_remove_old_episodes)
        gl.config.connect_gtk_togglebutton('auto_update_feeds', self.auto_update_feeds)
        gl.config.connect_gtk_spinbutton('auto_update_frequency', self.auto_update_frequency)
        gl.config.connect_gtk_togglebutton('display_tray_icon', self.display_tray_icon)
        gl.config.connect_gtk_togglebutton('minimize_to_tray', self.minimize_to_tray)
        gl.config.connect_gtk_togglebutton('enable_notifications', self.enable_notifications)
        gl.config.connect_gtk_togglebutton('start_iconified', self.start_iconified)
        gl.config.connect_gtk_togglebutton('bluetooth_enabled', self.bluetooth_enabled)
        gl.config.connect_gtk_togglebutton('bluetooth_ask_always', self.bluetooth_ask_always)
        gl.config.connect_gtk_togglebutton('bluetooth_ask_never', self.bluetooth_ask_never)
        gl.config.connect_gtk_togglebutton('bluetooth_use_converter', self.bluetooth_use_converter)
        gl.config.connect_gtk_filechooser( 'bluetooth_converter', self.bluetooth_converter, is_for_files=True)
        gl.config.connect_gtk_togglebutton('ipod_write_gtkpod_extended', self.ipod_write_gtkpod_extended)
        gl.config.connect_gtk_togglebutton('mp3_player_delete_played', self.delete_episodes_marked_played)
        
        self.enable_notifications.set_sensitive(self.display_tray_icon.get_active())    
        self.minimize_to_tray.set_sensitive(self.display_tray_icon.get_active()) 
        
        self.entryCustomSyncName.set_sensitive( self.cbCustomSyncName.get_active())

        self.radio_gnome_bittorrent.set_active(gl.config.use_gnome_bittorrent)
        self.radio_copy_torrents.set_active(not gl.config.use_gnome_bittorrent)

        self.iPodMountpoint.set_label( gl.config.ipod_mount)
        self.filesystemMountpoint.set_label( gl.config.mp3_player_folder)
        self.bluetooth_device_name.set_markup('<b>%s</b>'%gl.config.bluetooth_device_name)
        self.chooserDownloadTo.set_current_folder(gl.downloaddir)

        self.on_sync_delete.set_sensitive(not self.delete_episodes_marked_played.get_active())
        self.on_sync_mark_played.set_sensitive(not self.delete_episodes_marked_played.get_active())
        
        if tagging_supported():
            gl.config.connect_gtk_togglebutton( 'update_tags', self.updatetags)
        else:
            self.updatetags.set_sensitive( False)
            new_label = '%s (%s)' % ( self.updatetags.get_label(), _('needs python-eyed3') )
            self.updatetags.set_label( new_label)

        # device type
        self.comboboxDeviceType.set_active( 0)
        if gl.config.device_type == 'ipod':
            self.comboboxDeviceType.set_active( 1)
        elif gl.config.device_type == 'filesystem':
            self.comboboxDeviceType.set_active( 2)

        # setup cell renderers
        cellrenderer = gtk.CellRendererPixbuf()
        self.comboAudioPlayerApp.pack_start(cellrenderer, False)
        self.comboAudioPlayerApp.add_attribute(cellrenderer, 'pixbuf', 2)
        cellrenderer = gtk.CellRendererText()
        self.comboAudioPlayerApp.pack_start(cellrenderer, True)
        self.comboAudioPlayerApp.add_attribute(cellrenderer, 'markup', 0)

        cellrenderer = gtk.CellRendererPixbuf()
        self.comboVideoPlayerApp.pack_start(cellrenderer, False)
        self.comboVideoPlayerApp.add_attribute(cellrenderer, 'pixbuf', 2)
        cellrenderer = gtk.CellRendererText()
        self.comboVideoPlayerApp.pack_start(cellrenderer, True)
        self.comboVideoPlayerApp.add_attribute(cellrenderer, 'markup', 0)

        if not hasattr(self, 'user_apps_reader'):
            self.user_apps_reader = UserAppsReader(['audio', 'video'])

        if gpodder.interface == gpodder.GUI:
            self.user_apps_reader.read()

        self.comboAudioPlayerApp.set_model(self.user_apps_reader.get_applications_as_model('audio'))
        index = self.find_active_audio_app()
        self.comboAudioPlayerApp.set_active(index)
        self.comboVideoPlayerApp.set_model(self.user_apps_reader.get_applications_as_model('video'))
        index = self.find_active_video_app()
        self.comboVideoPlayerApp.set_active(index)

        self.ipodIcon.set_from_icon_name( 'gnome-dev-ipod', gtk.ICON_SIZE_BUTTON)

    def update_mountpoint( self, ipod):
        if ipod is None or ipod.mount_point is None:
            self.iPodMountpoint.set_label( '')
        else:
            self.iPodMountpoint.set_label( ipod.mount_point)

    def on_bluetooth_select_device_clicked(self, widget):
        # Stupid GTK doesn't provide us with a method to directly
        # edit the text of a gtk.Button without "destroying" the
        # image on it, so we dig into the button's widget tree and
        # get the gtk.Image and gtk.Label and edit the label directly.
        alignment = self.bluetooth_select_device.get_child()
        hbox = alignment.get_child()
        (image, label) = hbox.get_children()

        old_text = label.get_text()
        label.set_text(_('Searching...'))
        self.bluetooth_select_device.set_sensitive(False)
        while gtk.events_pending():
            gtk.main_iteration(False)

        # FIXME: Make bluetooth device discovery threaded, so
        # the GUI doesn't freeze while we are searching for devices
        found = False
        for name, address in util.discover_bluetooth_devices():
            if self.show_confirmation('Use this device as your bluetooth device?', name):
                gl.config.bluetooth_device_name = name
                gl.config.bluetooth_device_address = address
                self.bluetooth_device_name.set_markup('<b>%s</b>'%gl.config.bluetooth_device_name)
                found = True
                break
        if not found:
            self.show_message('No more devices found', 'Scan finished')
        self.bluetooth_select_device.set_sensitive(True)
        label.set_text(old_text)
    
    def find_active_audio_app(self):
        model = self.comboAudioPlayerApp.get_model()
        iter = model.get_iter_first()
        index = 0
        while iter is not None:
            command = model.get_value(iter, 1)
            if command == self.openApp.get_text():
                return index
            iter = model.iter_next(iter)
            index += 1
        # return last item = custom command
        return index-1

    def find_active_video_app( self):
        model = self.comboVideoPlayerApp.get_model()
        iter = model.get_iter_first()
        index = 0
        while iter is not None:
            command = model.get_value(iter, 1)
            if command == self.openVideoApp.get_text():
                return index
            iter = model.iter_next(iter)
            index += 1
        # return last item = custom command
        return index-1
    
    def set_download_dir( self, new_download_dir, event = None):
        gl.downloaddir = self.chooserDownloadTo.get_filename()
        if gl.downloaddir != self.chooserDownloadTo.get_filename():
            self.notification(_('There has been an error moving your downloads to the specified location. The old download directory will be used instead.'), _('Error moving downloads'))

        if event:
            event.set()
            
    def on_auto_update_feeds_toggled( self, widget, *args):
        self.auto_update_frequency.set_sensitive(widget.get_active())
        
    def on_display_tray_icon_toggled( self, widget, *args):
        self.enable_notifications.set_sensitive(widget.get_active())    
        self.minimize_to_tray.set_sensitive(widget.get_active())    
        
    def on_cbCustomSyncName_toggled( self, widget, *args):
        self.entryCustomSyncName.set_sensitive( widget.get_active())

    def on_only_sync_not_played_toggled( self, widget, *args):
        self.delete_episodes_marked_played.set_sensitive( widget.get_active())
        if not widget.get_active():
            self.delete_episodes_marked_played.set_active(False)

    def on_delete_episodes_marked_played_toggled( self, widget, *args):
        if widget.get_active() and self.only_sync_not_played.get_active():
            self.on_sync_leave.set_active(True)
        self.on_sync_delete.set_sensitive(not widget.get_active())
        self.on_sync_mark_played.set_sensitive(not widget.get_active())

    def on_btnCustomSyncNameHelp_clicked( self, widget):
        examples = [
                '<i>{episode.title}</i> -&gt; <b>Interview with RMS</b>',
                '<i>{episode.basename}</i> -&gt; <b>70908-interview-rms</b>',
                '<i>{episode.published}</i> -&gt; <b>20070908</b>'
        ]

        info = [
                _('You can specify a custom format string for the file names on your MP3 player here.'),
                _('The format string will be used to generate a file name on your device. The file extension (e.g. ".mp3") will be added automatically.'),
                '\n'.join( [ '   %s' % s for s in examples ])
        ]

        self.show_message( '\n\n'.join( info), _('Custom format strings'))

    def on_gPodderProperties_destroy(self, widget, *args):
        self.on_btnOK_clicked( widget, *args)

    def on_btnConfigEditor_clicked(self, widget, *args):
        self.on_btnOK_clicked(widget, *args)
        gPodderConfigEditor()

    def on_comboAudioPlayerApp_changed(self, widget, *args):
        # find out which one
        iter = self.comboAudioPlayerApp.get_active_iter()
        model = self.comboAudioPlayerApp.get_model()
        command = model.get_value( iter, 1)
        if command == '':
            self.openApp.set_sensitive( True)
            self.openApp.show()
            self.labelCustomCommand.show()
        else:
            self.openApp.set_text( command)
            self.openApp.set_sensitive( False)
            self.openApp.hide()
            self.labelCustomCommand.hide()

    def on_comboVideoPlayerApp_changed(self, widget, *args):
        # find out which one
        iter = self.comboVideoPlayerApp.get_active_iter()
        model = self.comboVideoPlayerApp.get_model()
        command = model.get_value(iter, 1)
        if command == '':
            self.openVideoApp.set_sensitive(True)
            self.openVideoApp.show()
            self.label115.show()
        else:
            self.openVideoApp.set_text(command)
            self.openVideoApp.set_sensitive(False)
            self.openVideoApp.hide()
            self.label115.hide()

    def on_cbEnvironmentVariables_toggled(self, widget, *args):
         sens = not self.cbEnvironmentVariables.get_active()
         self.httpProxy.set_sensitive( sens)
         self.ftpProxy.set_sensitive( sens)

    def on_comboboxDeviceType_changed(self, widget, *args):
        active_item = self.comboboxDeviceType.get_active()

        # None
        sync_widgets = ( self.only_sync_not_played, self.labelSyncOptions,
                         self.imageSyncOptions, self. separatorSyncOptions,
                         self.on_sync_mark_played, self.on_sync_delete,
                         self.on_sync_leave, self.label_after_sync, self.delete_episodes_marked_played)
        for widget in sync_widgets:
            if active_item == 0:
                widget.hide_all()
            else:
                widget.show_all()

        # iPod
        ipod_widgets = (self.ipodLabel, self.btn_iPodMountpoint,
                        self.ipod_write_gtkpod_extended)
        for widget in ipod_widgets:
            if active_item == 1:
                widget.show_all()
            else:
                widget.hide_all()

        # filesystem-based MP3 player
        fs_widgets = ( self.filesystemLabel, self.btn_filesystemMountpoint,
                       self.cbChannelSubfolder, self.cbCustomSyncName,
                       self.entryCustomSyncName, self.btnCustomSyncNameHelp )
        for widget in fs_widgets:
            if active_item == 2:
                widget.show_all()
            else:
                widget.hide_all()

    def on_btn_iPodMountpoint_clicked(self, widget, *args):
        fs = gtk.FileChooserDialog( title = _('Select iPod mountpoint'), action = gtk.FILE_CHOOSER_ACTION_SELECT_FOLDER)
        fs.add_button( gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
        fs.add_button( gtk.STOCK_OPEN, gtk.RESPONSE_OK)
        fs.set_current_folder(self.iPodMountpoint.get_label())
        if fs.run() == gtk.RESPONSE_OK:
            self.iPodMountpoint.set_label( fs.get_filename())
        fs.destroy()

    def on_btn_FilesystemMountpoint_clicked(self, widget, *args):
        fs = gtk.FileChooserDialog( title = _('Select folder for MP3 player'), action = gtk.FILE_CHOOSER_ACTION_SELECT_FOLDER)
        fs.add_button( gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL)
        fs.add_button( gtk.STOCK_OPEN, gtk.RESPONSE_OK)
        fs.set_current_folder(self.filesystemMountpoint.get_label())
        if fs.run() == gtk.RESPONSE_OK:
            self.filesystemMountpoint.set_label( fs.get_filename())
        fs.destroy()

    def on_btnOK_clicked(self, widget, *args):
        gl.config.ipod_mount = self.iPodMountpoint.get_label()
        gl.config.mp3_player_folder = self.filesystemMountpoint.get_label()

        if gl.downloaddir != self.chooserDownloadTo.get_filename():
            new_download_dir = self.chooserDownloadTo.get_filename()
            download_dir_size = util.calculate_size( gl.downloaddir)
            download_dir_size_string = gl.format_filesize( download_dir_size)
            event = Event()

            dlg = gtk.Dialog( _('Moving downloads folder'), self.gPodderProperties)
            dlg.vbox.set_spacing( 5)
            dlg.set_border_width( 5)
         
            label = gtk.Label()
            label.set_line_wrap( True)
            label.set_markup( _('Moving downloads from <b>%s</b> to <b>%s</b>...') % ( saxutils.escape( gl.downloaddir), saxutils.escape( new_download_dir), ))
            myprogressbar = gtk.ProgressBar()
         
            # put it all together
            dlg.vbox.pack_start( label)
            dlg.vbox.pack_end( myprogressbar)

            # switch windows
            dlg.show_all()
            self.gPodderProperties.hide_all()
         
            # hide action area and separator line
            dlg.action_area.hide()
            dlg.set_has_separator( False)

            args = ( new_download_dir, event, )

            thread = Thread( target = self.set_download_dir, args = args)
            thread.start()

            while not event.isSet():
                try:
                    new_download_dir_size = util.calculate_size( new_download_dir)
                except:
                    new_download_dir_size = 0
                if download_dir_size > 0:
                    fract = (1.00*new_download_dir_size) / (1.00*download_dir_size)
                else:
                    fract = 0.0
                if fract < 0.99:
                    myprogressbar.set_text( _('%s of %s') % ( gl.format_filesize( new_download_dir_size), download_dir_size_string, ))
                else:
                    myprogressbar.set_text( _('Finishing... please wait.'))
                myprogressbar.set_fraction(max(0.0,min(1.0,fract)))
                event.wait( 0.1)
                while gtk.events_pending():
                    gtk.main_iteration( False)

            dlg.destroy()

        device_type = self.comboboxDeviceType.get_active()
        if device_type == 0:
            gl.config.device_type = 'none'
        elif device_type == 1:
            gl.config.device_type = 'ipod'
        elif device_type == 2:
            gl.config.device_type = 'filesystem'
        self.gPodderProperties.destroy()
        if self.callback_finished:
            self.callback_finished()


class gPodderEpisode(GladeWidget):
    finger_friendly_widgets = ['episode_description', 'btnCloseWindow', 'btnDownload', 
    'btnCancel', 'btnSaveFile', 'btnPlay', 'btn_website']
    
    def new(self):
        global WEB_BROWSER_ICON
        self.image3166.set_property('icon-name', WEB_BROWSER_ICON)
        services.download_status_manager.register( 'list-changed', self.on_download_status_changed)
        services.download_status_manager.register( 'progress-detail', self.on_download_status_progress)

        self.episode_title.set_markup( '<span weight="bold" size="larger">%s</span>' % saxutils.escape( self.episode.title))

        if gpodder.interface == gpodder.MAEMO:
            # Hide the advanced prefs expander
            self.expander1.hide_all()

        b = gtk.TextBuffer()
        b.set_text( strip( self.episode.description))
        self.episode_description.set_buffer( b)

        self.gPodderEpisode.set_title( self.episode.title)
        self.LabelDownloadLink.set_text( self.episode.url)
        self.LabelWebsiteLink.set_text( self.episode.link)
        self.labelPubDate.set_text( self.episode.pubDate)

        # Hide the "Go to website" button if we don't have a valid URL
        if self.episode.link == self.episode.url or not self.episode.link:
            self.btn_website.hide_all()

        self.channel_title.set_markup( _('<i>from %s</i>') % saxutils.escape( self.channel.title))

        self.hide_show_widgets()
        services.download_status_manager.request_progress_detail( self.episode.url)

    def on_btnCancel_clicked( self, widget):
        services.download_status_manager.cancel_by_url( self.episode.url)

    def on_gPodderEpisode_destroy( self, widget):
        services.download_status_manager.unregister( 'list-changed', self.on_download_status_changed)
        services.download_status_manager.unregister( 'progress-detail', self.on_download_status_progress)

    def on_download_status_changed( self):
        self.hide_show_widgets()

    def on_btn_website_clicked(self, widget):
        util.open_website(self.episode.link)

    def on_download_status_progress( self, url, progress, speed):
        if url == self.episode.url:
            progress = float(min(100.0,max(0.0,progress)))
            self.progress_bar.set_fraction(progress/100.0)
            self.progress_bar.set_text( 'Downloading: %d%% (%s)' % ( progress, speed, ))

    def hide_show_widgets( self):
        is_downloading = services.download_status_manager.is_download_in_progress( self.episode.url)
        if is_downloading:
            self.progress_bar.show_all()
            self.btnCancel.show_all()
            self.btnPlay.hide_all()
            self.btnSaveFile.hide_all()
            self.btnDownload.hide_all()
        else:
            self.progress_bar.hide_all()
            self.btnCancel.hide_all()
            if os.path.exists( self.episode.local_filename()):
                self.btnPlay.show_all()
                self.btnSaveFile.show_all()
                self.btnDownload.hide_all()
            else:
                self.btnPlay.hide_all()
                self.btnSaveFile.hide_all()
                self.btnDownload.show_all()

    def on_btnCloseWindow_clicked(self, widget, *args):
        self.gPodderEpisode.destroy()

    def on_btnDownload_clicked(self, widget, *args):
        if self.download_callback:
            self.download_callback()

    def on_btnPlay_clicked(self, widget, *args):
        if self.play_callback:
            self.play_callback()

        self.gPodderEpisode.destroy()

    def on_btnSaveFile_clicked(self, widget, *args):
        self.show_copy_dialog( src_filename = self.episode.local_filename(), dst_filename = self.episode.sync_filename())


class gPodderSync(GladeWidget):
    def new(self):
        util.idle_add(self.imageSync.set_from_icon_name, 'gnome-dev-ipod', gtk.ICON_SIZE_DIALOG)

        self.device.register('progress', self.on_progress)
        self.device.register('sub-progress', self.on_sub_progress)
        self.device.register('status', self.on_status)
        self.device.register('done', self.on_done)
    
    def on_progress(self, pos, max):
        util.idle_add(self.progressbar.set_fraction, float(pos)/float(max))
        util.idle_add(self.progressbar.set_text, _('%d of %d done') % (pos, max))

    def on_sub_progress(self, percentage):
        util.idle_add(self.progressbar.set_text, _('Processing (%d%%)') % (percentage))

    def on_status(self, status):
        util.idle_add(self.status_label.set_markup, '<i>%s</i>' % saxutils.escape(status))

    def on_done(self):
        util.idle_add(self.gPodderSync.destroy)
        if not self.gPodder.minimized:
            util.idle_add(self.notification, _('Your device has been updated by gPodder.'), _('Operation finished'))

    def on_gPodderSync_destroy(self, widget, *args):
        self.device.unregister('progress', self.on_progress)
        self.device.unregister('sub-progress', self.on_sub_progress)
        self.device.unregister('status', self.on_status)
        self.device.unregister('done', self.on_done)
        self.device.cancel()

    def on_cancel_button_clicked(self, widget, *args):
        self.device.cancel()


class gPodderOpmlLister(GladeWidget):
    finger_friendly_widgets = ['btnDownloadOpml', 'btnCancel', 'btnOK', 'treeviewChannelChooser']
    
    def new(self):
        # initiate channels list
        self.channels = []
        self.callback_for_channel = None
        self.callback_finished = None

        if hasattr(self, 'custom_title'):
            self.gPodderOpmlLister.set_title(self.custom_title)
        if hasattr(self, 'hide_url_entry'):
            self.hbox25.hide_all()

        togglecell = gtk.CellRendererToggle()
        togglecell.set_property( 'activatable', True)
        togglecell.connect( 'toggled', self.callback_edited)
        togglecolumn = gtk.TreeViewColumn( '', togglecell, active=0)
        
        titlecell = gtk.CellRendererText()
        titlecell.set_property('ellipsize', pango.ELLIPSIZE_END)
        titlecolumn = gtk.TreeViewColumn(_('Podcast'), titlecell, markup=1)

        for itemcolumn in ( togglecolumn, titlecolumn ):
            self.treeviewChannelChooser.append_column( itemcolumn)

    def callback_edited( self, cell, path):
        model = self.treeviewChannelChooser.get_model()

        url = model[path][2]

        model[path][0] = not model[path][0]
        if model[path][0]:
            self.channels.append( url)
        else:
            self.channels.remove( url)

        self.btnOK.set_sensitive( bool(len(self.channels)))

    def thread_finished(self, model):
        self.treeviewChannelChooser.set_model(model)
        self.labelStatus.set_label('')
        self.btnDownloadOpml.set_sensitive(True)
        self.entryURL.set_sensitive(True)
        self.treeviewChannelChooser.set_sensitive(True)
        self.channels = []

    def thread_func(self):
        url = self.entryURL.get_text()
        importer = opml.Importer(url)
        model = importer.get_model()
        if len(model) == 0:
            self.notification(_('The specified URL does not provide any valid OPML podcast items.'), _('No feeds found'))
        util.idle_add(self.thread_finished, model)
    
    def get_channels_from_url( self, url, callback_for_channel = None, callback_finished = None):
        if callback_for_channel:
            self.callback_for_channel = callback_for_channel
        if callback_finished:
            self.callback_finished = callback_finished
        self.labelStatus.set_label( _('Downloading, please wait...'))
        self.entryURL.set_text( url)
        self.btnDownloadOpml.set_sensitive( False)
        self.entryURL.set_sensitive( False)
        self.btnOK.set_sensitive( False)
        self.treeviewChannelChooser.set_sensitive( False)
        Thread( target = self.thread_func).start()

    def on_gPodderOpmlLister_destroy(self, widget, *args):
        pass

    def on_btnDownloadOpml_clicked(self, widget, *args):
        self.get_channels_from_url( self.entryURL.get_text())

    def on_btnOK_clicked(self, widget, *args):
        self.gPodderOpmlLister.destroy()

        # add channels that have been selected
        for url in self.channels:
            if self.callback_for_channel:
                self.callback_for_channel( url)

        if self.callback_finished:
            self.callback_finished()

    def on_btnCancel_clicked(self, widget, *args):
        self.gPodderOpmlLister.destroy()


class gPodderEpisodeSelector( GladeWidget):
    """Episode selection dialog

    Optional keyword arguments that modify the behaviour of this dialog:

      - callback: Function that takes 1 parameter which is a list of
                  the selected episodes (or empty list when none selected)
      - episodes: List of episodes that are presented for selection
      - selected: (optional) List of boolean variables that define the
                  default checked state for the given episodes
      - selected_default: (optional) The default boolean value for the
                          checked state if no other value is set
                          (default is False)
      - columns: List of (name,caption) pairs for the columns, the name
                 is the attribute name of the episode to be read from 
                 each episode object and the caption attribute is the
                 text that appear as column caption
                 (default is [('title','Episode'),])
      - title: (optional) The title of the window + heading
      - instructions: (optional) A one-line text describing what the 
                      user should select / what the selection is for
      - stock_ok_button: (optional) Will replace the "OK" button with
                         another GTK+ stock item to be used for the
                         affirmative button of the dialog (e.g. can 
                         be gtk.STOCK_DELETE when the episodes to be
                         selected will be deleted after closing the 
                         dialog)
      - selection_buttons: (optional) A dictionary with labels as 
                           keys and callbacks as values; for each
                           key a button will be generated, and when
                           the button is clicked, the callback will
                           be called for each episode and the return
                           value of the callback (True or False) will
                           be the new selected state of the episode
      - size_attribute: (optional) The name of an attribute of the 
                        supplied episode objects that can be used to
                        calculate the size of an episode; set this to
                        None if no total size calculation should be
                        done (in cases where total size is useless)
                        (default is 'length')
                           
    """
    finger_friendly_widgets = ['btnCancel', 'btnOK', 'btnCheckAll', 'btnCheckNone', 'treeviewEpisodes']
    
    COLUMN_TOGGLE = 0
    COLUMN_ADDITIONAL = 1

    def new( self):
        if not hasattr( self, 'callback'):
            self.callback = None

        if not hasattr( self, 'episodes'):
            self.episodes = []

        if not hasattr( self, 'size_attribute'):
            self.size_attribute = 'length'

        if not hasattr( self, 'selection_buttons'):
            self.selection_buttons = {}

        if not hasattr( self, 'selected_default'):
            self.selected_default = False

        if not hasattr( self, 'selected'):
            self.selected = [self.selected_default]*len(self.episodes)

        if len(self.selected) < len(self.episodes):
            self.selected += [self.selected_default]*(len(self.episodes)-len(self.selected))

        if not hasattr( self, 'columns'):
            self.columns = ( ('title', _('Episode')), )

        if hasattr( self, 'title'):
            self.gPodderEpisodeSelector.set_title( self.title)
            self.labelHeading.set_markup( '<b><big>%s</big></b>' % saxutils.escape( self.title))

        if gpodder.interface == gpodder.MAEMO:
            self.labelHeading.hide()

        if hasattr( self, 'instructions'):
            self.labelInstructions.set_text( self.instructions)
            self.labelInstructions.show_all()

        if hasattr( self, 'stock_ok_button'):
            self.btnOK.set_label( self.stock_ok_button)
            self.btnOK.set_use_stock( True)

        toggle_cell = gtk.CellRendererToggle()
        toggle_cell.connect( 'toggled', self.toggle_cell_handler)

        self.treeviewEpisodes.append_column( gtk.TreeViewColumn( '', toggle_cell, active=self.COLUMN_TOGGLE))

        next_column = self.COLUMN_ADDITIONAL
        for name, caption in self.columns:
            renderer = gtk.CellRendererText()
            renderer.set_property( 'ellipsize', pango.ELLIPSIZE_END)
            column = gtk.TreeViewColumn( caption, renderer, text=next_column)
            column.set_resizable( True)
            # Only set "expand" on the first column (so more text is displayed there)
            column.set_expand(next_column == self.COLUMN_ADDITIONAL)
            self.treeviewEpisodes.append_column( column)
            next_column += 1

        column_types = [ gobject.TYPE_BOOLEAN ] + [ gobject.TYPE_STRING ] * len(self.columns)
        self.model = gtk.ListStore( *column_types)

        for index, episode in enumerate( self.episodes):
            row = [ self.selected[index] ]
            for name, caption in self.columns:
                if not hasattr(episode, name):
                    log('Warning: Missing attribute "%s"', name, sender=self)
                    row.append(None)
                else:
                    row.append(getattr( episode, name))
            self.model.append( row)

        for label in self.selection_buttons:
            button = gtk.Button( label)
            button.connect('clicked', self.custom_selection_button_clicked, label)
            self.hboxButtons.pack_start( button, expand = False)
            button.show_all()

        self.treeviewEpisodes.set_rules_hint( True)
        self.treeviewEpisodes.set_model( self.model)
        self.treeviewEpisodes.columns_autosize()
        self.calculate_total_size()

    def calculate_total_size( self):
        if self.size_attribute is not None:
            total_size = 0
            for index, row in enumerate( self.model):
                if self.model.get_value( row.iter, self.COLUMN_TOGGLE) == True:
                    try:
                        total_size += int(getattr( self.episodes[index], self.size_attribute))
                    except:
                        log( 'Cannot get size for %s', self.episodes[index].title, sender = self)
            
            if total_size > 0:
                self.labelTotalSize.set_text( _('Total size: %s') % gl.format_filesize( total_size))
            else:
                self.labelTotalSize.set_text( '')
            self.labelTotalSize.show_all()
        else:
            self.labelTotalSize.hide_all()

    def toggle_cell_handler( self, cell, path):
        model = self.treeviewEpisodes.get_model()
        model[path][self.COLUMN_TOGGLE] = not model[path][self.COLUMN_TOGGLE]

        if self.size_attribute is not None:
            self.calculate_total_size()

    def custom_selection_button_clicked(self, button, label):
        callback = self.selection_buttons[label]

        for index, row in enumerate( self.model):
            new_value = callback( self.episodes[index])
            self.model.set_value( row.iter, self.COLUMN_TOGGLE, new_value)

        self.calculate_total_size()

    def on_btnCheckAll_clicked( self, widget):
        for row in self.model:
            self.model.set_value( row.iter, self.COLUMN_TOGGLE, True)

        self.calculate_total_size()

    def on_btnCheckNone_clicked( self, widget):
        for row in self.model:
            self.model.set_value( row.iter, self.COLUMN_TOGGLE, False)

        self.calculate_total_size()

    def get_selected_episodes( self):
        selected_episodes = []

        for index, row in enumerate( self.model):
            if self.model.get_value( row.iter, self.COLUMN_TOGGLE) == True:
                selected_episodes.append( self.episodes[index])

        return selected_episodes

    def on_btnOK_clicked( self, widget):
        self.gPodderEpisodeSelector.destroy()
        if self.callback is not None:
            self.callback( self.get_selected_episodes())

    def on_btnCancel_clicked( self, widget):
        self.gPodderEpisodeSelector.destroy()
        if self.callback is not None:
            self.callback([])

class gPodderConfigEditor(GladeWidget):
    finger_friendly_widgets = ['btnShowAll', 'btnClose', 'configeditor']
    
    def new(self):
        name_column = gtk.TreeViewColumn(_('Variable'))
        name_renderer = gtk.CellRendererText()
        name_column.pack_start(name_renderer)
        name_column.add_attribute(name_renderer, 'text', 0)
        name_column.add_attribute(name_renderer, 'weight', 5)
        self.configeditor.append_column(name_column)

        type_column = gtk.TreeViewColumn(_('Type'))
        type_renderer = gtk.CellRendererText()
        type_column.pack_start(type_renderer)
        type_column.add_attribute(type_renderer, 'text', 1)
        type_column.add_attribute(type_renderer, 'weight', 5)
        self.configeditor.append_column(type_column)

        value_column = gtk.TreeViewColumn(_('Value'))
        value_renderer = gtk.CellRendererText()
        value_column.pack_start(value_renderer)
        value_column.add_attribute(value_renderer, 'text', 2)
        value_column.add_attribute(value_renderer, 'editable', 4)
        value_column.add_attribute(value_renderer, 'weight', 5)
        value_renderer.connect('edited', self.value_edited)
        self.configeditor.append_column(value_column)

        self.model = gl.config.model()
        self.filter = self.model.filter_new()
        self.filter.set_visible_func(self.visible_func)

        self.configeditor.set_model(self.filter)
        self.configeditor.set_rules_hint(True)

    def visible_func(self, model, iter, user_data=None):
        text = self.entryFilter.get_text().lower()
        if text == '':
            return True
        else:
            # either the variable name or its value
            return (text in model.get_value(iter, 0).lower() or
                    text in model.get_value(iter, 2).lower())

    def value_edited(self, renderer, path, new_text):
        model = self.configeditor.get_model()
        iter = model.get_iter(path)
        name = model.get_value(iter, 0)
        type_cute = model.get_value(iter, 1)

        if not gl.config.update_field(name, new_text):
            self.notification(_('Cannot set value of <b>%s</b> to <i>%s</i>.\n\nNeeded data type: %s') % (saxutils.escape(name), saxutils.escape(new_text), saxutils.escape(type_cute)), _('Error updating %s') % saxutils.escape(name))
    
    def on_entryFilter_changed(self, widget):
        self.filter.refilter()

    def on_btnShowAll_clicked(self, widget):
        self.entryFilter.set_text('')
        self.entryFilter.grab_focus()

    def on_configeditor_row_activated(self, treeview, path, view_column):
        model = treeview.get_model()
        it = model.get_iter(path)
        field_name = model.get_value(it, 0)
        field_type = model.get_value(it, 3)

        # Flip the boolean config flag
        if field_type == bool:
            gl.config.toggle_flag(field_name)

    def on_btnClose_clicked(self, widget):
        self.gPodderConfigEditor.destroy()


def main():
    gobject.threads_init()
    gtk.window_set_default_icon_name( 'gpodder')

    gPodder().run()