def _create_category_widget(self):
        scrolled_window = ScrolledWindow()
        scrolled_window.show()
        scrolled_window.set_shadow_type(Gtk.ShadowType.IN)
        self.view = view = RCMHintedTreeView()
        view.show()
        view.set_headers_visible(False)
        scrolled_window.set_policy(
            Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
        scrolled_window.add(view)
        model = Gtk.ListStore(int, str, str, str, bool)
        filters = self.filters
        for (i, (name, data)) in enumerate(filters):
            filter_type, icon, query, always = data
            enabled = always
            model.append(row=[filter_type, icon, name, query, enabled])

        def search_func(model, column, key, iter, data):
            return key.lower() not in model[iter][column].lower()

        view.set_search_column(self.ModelIndex.NAME)
        view.set_search_equal_func(search_func, None)

        column = Gtk.TreeViewColumn("Songs")
        column.set_sizing(Gtk.TreeViewColumnSizing.FIXED)
        renderpb = Gtk.CellRendererPixbuf()
        renderpb.props.xpad = 6
        renderpb.props.ypad = 6
        column.pack_start(renderpb, False)
        column.add_attribute(renderpb, "icon-name", self.ModelIndex.ICON_NAME)
        render = Gtk.CellRendererText()
        render.set_property('ellipsize', Pango.EllipsizeMode.END)

        def cdf(column, cell, model, iter_, user_data):
            on = (self.login_state == State.LOGGED_IN or
                  model[iter_][self.ModelIndex.ALWAYS_ENABLE])
            cell.set_sensitive(on)
        column.set_cell_data_func(render, cdf)
        column.set_cell_data_func(renderpb, cdf)

        view.append_column(column)
        column.pack_start(render, True)
        column.add_attribute(render, "text", self.ModelIndex.NAME)
        view.set_model(model)

        selection = view.get_selection()

        def select_func(sel, model, path, value):
            return (self.login_state == State.LOGGED_IN or
                    model[model.get_iter(path)][self.ModelIndex.ALWAYS_ENABLE])

        selection.set_select_function(select_func)
        self._refresh_online_filters()
        self.__changed_sig = connect_destroy(selection, 'changed',
                                             DeferredSignal(self._on_select))
        return scrolled_window

    def __init__(self, library, main):
        super(AudioFeeds, self).__init__(spacing=6)

        self.__view = view = AllTreeView()
        self.__render = render = gtk.CellRendererText()
        render.set_property('ellipsize', pango.ELLIPSIZE_END)
        col = gtk.TreeViewColumn("Audio Feeds", render)
        col.set_cell_data_func(render, AudioFeeds.cell_data)
        view.append_column(col)
        view.set_model(self.__feeds)
        view.set_rules_hint(True)
        view.set_headers_visible(False)
        swin = ScrolledWindow()
        swin.set_shadow_type(gtk.SHADOW_IN)
        swin.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
        swin.add(view)
        self.pack_start(swin)

        new = gtk.Button(stock=gtk.STOCK_NEW)
        new.connect('clicked', self.__new_feed)
        view.get_selection().connect('changed', self.__changed)
        view.get_selection().set_mode(gtk.SELECTION_MULTIPLE)
        view.connect('popup-menu', self.__popup_menu)

        targets = [("text/uri-list", 0, 1), ("text/x-moz-url", 0, 2)]
        view.drag_dest_set(gtk.DEST_DEFAULT_ALL, targets, gtk.gdk.ACTION_COPY)
        view.connect('drag-data-received', self.__drag_data_received)
        view.connect('drag-motion', self.__drag_motion)
        view.connect('drag-leave', self.__drag_leave)

        self.connect_object('destroy', self.__save, view)

        self.pack_start(Alignment(new, left=3, bottom=3), expand=False)
        self.show_all()

    def __init__(self, library):
        super(FileSystem, self).__init__()
        sw = ScrolledWindow()
        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
        sw.set_shadow_type(Gtk.ShadowType.IN)

        dt = MainDirectoryTree(folders=get_scan_dirs())
        targets = [("text/x-quodlibet-songs", Gtk.TargetFlags.SAME_APP,
                    self.TARGET_QL),
                   ("text/uri-list", 0, self.TARGET_EXT)]
        targets = [Gtk.TargetEntry.new(*t) for t in targets]

        dt.drag_source_set(Gdk.ModifierType.BUTTON1_MASK,
                           targets, Gdk.DragAction.COPY)
        dt.connect('drag-data-get', self.__drag_data_get)

        sel = dt.get_selection()
        sel.unselect_all()
        connect_obj(sel, 'changed', copool.add, self.__songs_selected, dt)
        sel.connect("changed", self._on_selection_changed)
        dt.connect('row-activated', lambda *a: self.songs_activated())
        sw.add(dt)
        self.pack_start(sw, True, True, 0)

        self.show_all()

    def refresh_panes(self):
        self.multi_paned.destroy()

        # Fill in the pane list. The last pane reports back to us.
        self._panes = [self]
        for header in reversed(get_headers()):
            pane = Pane(self._library, header, self._panes[0])
            pane.connect('row-activated',
                         lambda *x: self.songs_activated())
            self._panes.insert(0, pane)
        self._panes.pop()  # remove self

        # Put the panes in scrollable windows
        sws = []
        for pane in self._panes:
            sw = ScrolledWindow()
            sw.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
            sw.set_shadow_type(Gtk.ShadowType.IN)
            sw.add(pane)
            sws.append(sw)

        self.multi_paned.set_widgets(sws)
        self.multi_paned.show_all()
        self.main_box.pack1(self.multi_paned.get_paned(), True, False)

        self.__star = {}
        for p in self._panes:
            tags = [t for t in p.tags if not t.startswith("~#")]
            self.__star.update(dict.fromkeys(tags))

        self.set_column_mode(config.gettext("browsers", "pane_mode"))

    def refresh_panes(self):
        hbox = self.main_box.get_child1()
        if hbox:
            hbox.destroy()

        hbox = Gtk.HBox(spacing=6)
        hbox.set_homogeneous(True)

        # Fill in the pane list. The last pane reports back to us.
        self._panes = [self]
        for header in reversed(get_headers()):
            pane = Pane(self._library, header, self._panes[0])
            self._panes.insert(0, pane)
        self._panes.pop()  # remove self

        for pane in self._panes:
            pane.connect('row-activated',
                         lambda *x: self.songs_activated())
            sw = ScrolledWindow()
            sw.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
            sw.set_shadow_type(Gtk.ShadowType.IN)
            sw.add(pane)
            hbox.pack_start(sw, True, True, 0)

        self.main_box.pack1(hbox, True, False)
        hbox.show_all()

        self.__star = {}
        for p in self._panes:
            tags = [t for t in p.tags if not t.startswith("~#")]
            self.__star.update(dict.fromkeys(tags))

        self.set_wide_mode(config.getboolean("browsers", "pane_wide_mode"))

    def __init__(self, library):
        super(AudioFeeds, self).__init__(spacing=6)
        self.set_orientation(Gtk.Orientation.VERTICAL)

        self.__view = view = AllTreeView()
        self.__render = render = Gtk.CellRendererText()
        render.set_property('ellipsize', Pango.EllipsizeMode.END)
        col = Gtk.TreeViewColumn("Audio Feeds", render)
        col.set_cell_data_func(render, AudioFeeds.cell_data)
        view.append_column(col)
        view.set_model(self.__feeds)
        view.set_rules_hint(True)
        view.set_headers_visible(False)
        swin = ScrolledWindow()
        swin.set_shadow_type(Gtk.ShadowType.IN)
        swin.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
        swin.add(view)
        self.pack_start(swin, True, True, 0)

        new = Button(_("_New"), Icons.LIST_ADD, Gtk.IconSize.MENU)
        new.connect('clicked', self.__new_feed)
        view.get_selection().connect('changed', self.__changed)
        view.get_selection().set_mode(Gtk.SelectionMode.MULTIPLE)
        view.connect('popup-menu', self.__popup_menu)

        targets = [
            ("text/uri-list", 0, DND_URI_LIST),
            ("text/x-moz-url", 0, DND_MOZ_URL)
        ]
        targets = [Gtk.TargetEntry.new(*t) for t in targets]

        view.drag_dest_set(Gtk.DestDefaults.ALL, targets, Gdk.DragAction.COPY)
        view.connect('drag-data-received', self.__drag_data_received)
        view.connect('drag-motion', self.__drag_motion)
        view.connect('drag-leave', self.__drag_leave)

        connect_obj(self, 'destroy', self.__save, view)

        self.pack_start(Align(new, left=3, bottom=3), False, True, 0)

        for child in self.get_children():
            child.show_all()

    def __init__(self, library, main):
        super(FileSystem, self).__init__()
        sw = ScrolledWindow()
        sw.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
        sw.set_shadow_type(gtk.SHADOW_IN)

        folders = filter(None, split_scan_dirs(config.get("settings", "scan")))

        dt = DirectoryTree(folders=folders)
        targets = [("text/x-quodlibet-songs", gtk.TARGET_SAME_APP, 1),
                   ("text/uri-list", 0, 2)]
        dt.drag_source_set(gtk.gdk.BUTTON1_MASK, targets, gtk.gdk.ACTION_COPY)
        dt.connect('drag-data-get', self.__drag_data_get)

        sel = dt.get_selection()
        sel.unselect_all()
        sel.connect_object('changed', copool.add, self.__songs_selected, dt)
        if main:
            dt.connect('row-activated', lambda *a: self.emit("activated"))
        sw.add(dt)
        self.pack_start(sw)
        self.show_all()

    def refresh_panes(self):
        try:
            hbox = self.get_children()[1]
        except IndexError:
            pass  # first call
        else:
            hbox.destroy()

        hbox = gtk.HBox(spacing=6)
        hbox.set_homogeneous(True)
        hbox.set_size_request(100, 100)
        # fill in the pane list. the last pane reports back to us.
        self.__panes = [self]
        panes = get_headers()
        panes.reverse()
        for pane in panes:
            self.__panes.insert(
                0, Pane(pane, self.__panes[0], self._library))
        self.__panes.pop()  # remove self

        for pane in self.__panes:
            if self.__main:
                pane.connect('row-activated',
                             lambda *x: self.emit("activated"))
            sw = ScrolledWindow()
            sw.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
            sw.set_shadow_type(gtk.SHADOW_IN)
            sw.add(pane)
            hbox.pack_start(sw)

        self.pack_start(hbox)
        self.show_all()

        self.__star = {}
        for p in self.__panes:
            self.__star.update(dict.fromkeys(p.tags))

    def __init__(self, library):
        super(MediaDevices, self).__init__(spacing=6)
        self.set_orientation(Gtk.Orientation.VERTICAL)
        self._register_instance()

        self.__cache = {}

        # Device list on the left pane
        swin = ScrolledWindow()
        swin.set_shadow_type(Gtk.ShadowType.IN)
        swin.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
        self.pack_start(swin, True, True, 0)

        self.__view = view = AllTreeView()
        view.set_model(self.__devices)
        view.set_rules_hint(True)
        view.set_headers_visible(False)
        view.get_selection().set_mode(Gtk.SelectionMode.BROWSE)
        connect_obj(view.get_selection(), 'changed', self.__refresh, False)
        view.connect('popup-menu', self.__popup_menu, library)
        view.connect('row-activated', lambda *a: self.songs_activated())
        swin.add(view)

        col = Gtk.TreeViewColumn("Devices")
        view.append_column(col)

        render = Gtk.CellRendererPixbuf()
        col.pack_start(render, False)
        col.add_attribute(render, 'icon-name', 1)

        self.__render = render = Gtk.CellRendererText()
        render.set_property('ellipsize', Pango.EllipsizeMode.END)
        render.connect('edited', self.__edited)
        col.pack_start(render, True)
        col.set_cell_data_func(render, MediaDevices.cell_data)

        hbox = Gtk.HBox(spacing=6)
        hbox.set_homogeneous(True)
        self.pack_start(Align(hbox, left=3, bottom=3), False, True, 0)

        # refresh button
        refresh = Button(_("_Refresh"), Gtk.STOCK_REFRESH, Gtk.IconSize.MENU)
        self.__refresh_button = refresh
        connect_obj(refresh, 'clicked', self.__refresh, True)
        refresh.set_sensitive(False)
        hbox.pack_start(refresh, True, True, 0)

        # eject button
        eject = Button(_("_Eject"), "media-eject", Gtk.IconSize.MENU)
        self.__eject_button = eject
        eject.connect('clicked', self.__eject)
        eject.set_sensitive(False)
        hbox.pack_start(eject, True, True, 0)

        # Device info on the right pane
        self.__header = table = Gtk.Table()
        table.set_col_spacings(8)

        self.__device_icon = icon = Gtk.Image()
        icon.set_size_request(48, 48)
        table.attach(icon, 0, 1, 0, 2, 0)

        self.__device_name = label = Gtk.Label()
        label.set_ellipsize(Pango.EllipsizeMode.END)
        label.set_alignment(0, 0)
        table.attach(label, 1, 3, 0, 1)

        self.__device_space = label = Gtk.Label()
        label.set_ellipsize(Pango.EllipsizeMode.END)
        label.set_alignment(0, 0.5)
        table.attach(label, 1, 2, 1, 2)

        self.__progress = progress = Gtk.ProgressBar()
        progress.set_size_request(150, -1)
        table.attach(progress, 2, 3, 1, 2, xoptions=0, yoptions=0)

        self.accelerators = Gtk.AccelGroup()
        key, mod = Gtk.accelerator_parse('F2')
        self.accelerators.connect(key, mod, 0, self.__rename)

        self.__statusbar = WaitLoadBar()

        for child in self.get_children():
            child.show_all()

    def __init__(self, library):
        super(CollectionBrowser, self).__init__(spacing=6)
        self.set_orientation(Gtk.Orientation.VERTICAL)

        self._register_instance()
        if self.__model is None:
            self._init_model(library)

        sw = ScrolledWindow()
        sw.set_shadow_type(Gtk.ShadowType.IN)
        self.view = view = CollectionView()
        view.set_headers_visible(False)
        model_sort = CollectionSortModel(model=self.__model)
        model_filter = CollectionFilterModel(child_model=model_sort)
        self.__filter = None
        self.__bg_filter = background_filter()
        model_filter.set_visible_func(self.__parse_query)
        view.set_model(model_filter)

        def cmpa(a, b):
            """Like cmp but treats values that evaluate to false as inf"""
            if not a and b:
                return 1
            if not b and a:
                return -1
            return cmp(a, b)

        def cmp_rows(model, i1, i2, data):
            t1, t2 = model[i1][0], model[i2][0]
            pos1 = _ORDERING.get(t1, 0)
            pos2 = _ORDERING.get(t2, 0)
            if pos1 or pos2:
                return cmp(pos1, pos2)

            if not isinstance(t1, AlbumNode):
                return cmp(util.human_sort_key(t1), util.human_sort_key(t2))

            a1, a2 = t1.album, t2.album
            return (cmpa(a1.peoplesort, a2.peoplesort) or
                    cmpa(a1.date, a2.date) or
                    cmpa(a1.sort, a2.sort) or
                    cmp(a1.key, a2.key))

        model_sort.set_sort_func(0, cmp_rows)
        model_sort.set_sort_column_id(0, Gtk.SortType.ASCENDING)

        column = Gtk.TreeViewColumn("albums")

        def cell_data(column, cell, model, iter_, data):
            markup = model.get_markup(self.__model.tags, iter_)
            cell.markup = markup
            cell.set_property('markup', markup)

        def get_scaled_cover(item):
            if item.scanned:
                return item.cover

            scale_factor = self.get_scale_factor()
            item.scan_cover(scale_factor=scale_factor)
            return item.cover

        def cell_data_pb(column, cell, model, iter_, data):
            album = model.get_album(iter_)
            if album is None:
                cell.set_property('icon-name', Icons.FOLDER)
            else:
                item = model.get_value(iter_)
                cover = get_scaled_cover(item)
                if cover:
                    cover = add_border_widget(cover, view)
                    surface = get_surface_for_pixbuf(self, cover)
                    cell.set_property("surface", surface)
                else:
                    cell.set_property('icon-name', Icons.MEDIA_OPTICAL)

        imgrender = Gtk.CellRendererPixbuf()
        render = Gtk.CellRendererText()
        if view.supports_hints():
            render.set_property('ellipsize', Pango.EllipsizeMode.END)
        column.pack_start(imgrender, False)
        column.pack_start(render, True)
        column.set_cell_data_func(render, cell_data)
        column.set_cell_data_func(imgrender, cell_data_pb)
        view.append_column(column)

        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
        sw.add(view)

        hbox = Gtk.HBox(spacing=6)

        prefs = Gtk.Button()
        prefs.add(SymbolicIconImage(Icons.EMBLEM_SYSTEM, Gtk.IconSize.MENU))
        prefs.connect('clicked', lambda *x: Preferences(self))

        self.accelerators = Gtk.AccelGroup()
        search = SearchBarBox(completion=AlbumTagCompletion(),
                              accel_group=self.accelerators)
        search.connect('query-changed', self.__update_filter)
        connect_obj(search, 'focus-out', lambda w: w.grab_focus(), view)
        self.__search = search
#.........这里部分代码省略.........

    def __init__(self, Kind, library, player):
        super(LibraryBrowser, self).__init__(dialog=False)
        self._register_instance()
        self.name = Kind.__name__

        self.set_default_size(600, 400)
        self.enable_window_tracking("browser_" + self.name)
        self.set_title(Kind.name + " - Quod Libet")
        self.add(Gtk.VBox())

        view = SongList(library, update=True)
        view.info.connect("changed", self.__set_time)
        self.songlist = view

        sw = ScrolledWindow()
        sw.set_shadow_type(Gtk.ShadowType.IN)
        sw.add(view)
        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)

        self.browser = browser = Kind(library)
        if browser.can_reorder:
            view.enable_drop()
        elif browser.dropped:
            view.enable_drop(False)
        if browser.accelerators:
            self.add_accel_group(browser.accelerators)

        self.__container = browser.pack(sw)
        self.get_child().pack_start(self.__container, True, True, 0)

        main = self.get_child()
        bottom = Gtk.HBox()
        main.pack_end(bottom, False, True, 0)

        self._filter_menu = filter_menu = FilterMenu(library, player)
        filter_menu.set_browser(self.browser)
        self.add_accel_group(filter_menu.get_accel_group())
        bottom.pack_start(filter_menu.get_widget(), False, True, 0)
        filter_menu.get_widget().show()

        self.__statusbar = Gtk.Label()
        self.__statusbar.set_text(_("No time information"))
        self.__statusbar.set_alignment(1.0, 0.5)
        self.__statusbar.set_padding(6, 3)
        self.__statusbar.set_ellipsize(Pango.EllipsizeMode.START)
        bottom.pack_end(self.__statusbar, True, True, 0)
        self.__statusbar.show()
        bottom.show()

        browser.connect('songs-selected', self.__browser_cb)
        browser.finalize(False)
        view.connect('popup-menu', self.__menu, library)
        view.connect('drag-data-received', self.__drag_data_recv)
        view.connect('row-activated', self.__enqueue, player)

        if browser.headers is not None:
            view.connect('columns-changed', self.__cols_changed, browser)
            self.__cols_changed(view, browser)
        sw.show_all()
        for c in self.get_child().get_children():
            c.show()
        self.get_child().show()

        self.connect("destroy", self._on_destroy)

    def __init__(self, library, player):
        super(QueueExpander, self).__init__(spacing=3)
        sw = ScrolledWindow()
        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
        sw.set_shadow_type(Gtk.ShadowType.IN)
        self.queue = PlayQueue(library, player)
        self.queue.props.expand = True
        sw.add(self.queue)

        add_css(self, ".ql-expanded title { margin-bottom: 5px; }")

        outer = ExpandBoxHack(spacing=12)

        left = Gtk.HBox(spacing=12)

        hb2 = Gtk.HBox(spacing=3)
        state_icon = PlaybackStatusIcon()
        state_icon.stop()
        state_icon.show()
        hb2.pack_start(state_icon, True, True, 0)
        name_label = Gtk.Label(label=_("_Queue"), use_underline=True)
        hb2.pack_start(name_label, True, True, 0)
        left.pack_start(hb2, False, True, 0)

        b = SmallImageButton(
            image=SymbolicIconImage(Icons.EDIT_CLEAR, Gtk.IconSize.MENU))
        b.set_tooltip_text(_("Remove all songs from the queue"))
        b.connect('clicked', self.__clear_queue)
        b.set_no_show_all(True)
        b.set_relief(Gtk.ReliefStyle.NONE)
        left.pack_start(b, False, False, 0)

        self.count_label = count_label = Gtk.Label()
        left.pack_start(count_label, False, True, 0)

        outer.pack_start(left, True, True, 0)

        close_button = SmallImageButton(
            image=SymbolicIconImage("window-close", Gtk.IconSize.MENU),
            relief=Gtk.ReliefStyle.NONE)

        close_button.connect("clicked", lambda *x: self.hide())

        outer.pack_start(close_button, False, False, 6)
        self.set_label_fill(True)

        cb = ConfigCheckButton(
            _("_Random"), "memory", "shufflequeue")
        cb.connect('toggled', self.__queue_shuffle, self.queue.model)
        cb.set_active(config.getboolean("memory", "shufflequeue"))
        cb.set_no_show_all(True)
        left.pack_start(cb, False, True, 0)

        self.set_label_widget(outer)
        self.add(sw)
        connect_obj(self, 'notify::expanded', self.__expand, cb, b)

        targets = [
            ("text/x-quodlibet-songs", Gtk.TargetFlags.SAME_APP, DND_QL),
            ("text/uri-list", 0, DND_URI_LIST)
        ]
        targets = [Gtk.TargetEntry.new(*t) for t in targets]

        self.drag_dest_set(Gtk.DestDefaults.ALL, targets, Gdk.DragAction.COPY)
        self.connect('drag-motion', self.__motion)
        self.connect('drag-data-received', self.__drag_data_received)

        self.queue.model.connect_after('row-inserted',
            util.DeferredSignal(self.__check_expand), count_label)
        self.queue.model.connect_after('row-deleted',
            util.DeferredSignal(self.__update_count), count_label)

        connect_obj(self, 'notify::visible', self.__visible, cb, b)
        self.__update_count(self.model, None, count_label)

        connect_destroy(
            player, 'song-started', self.__update_state_icon, state_icon)
        connect_destroy(
            player, 'paused', self.__update_state_icon_pause,
            state_icon, True)
        connect_destroy(
            player, 'unpaused', self.__update_state_icon_pause,
            state_icon, False)

        # to make the children clickable if mapped
        # ....no idea why, but works
        def hack(expander):
            label = expander.get_label_widget()
            if label:
                label.unmap()
                label.map()
        self.connect("map", hack)

        self.set_expanded(config.getboolean("memory", "queue_expanded"))
        self.notify("expanded")

        for child in self.get_children():
            child.show_all()

    def __init__(self, library, songs, parent=None):
        super(SongProperties, self).__init__(dialog=False)
        self.set_transient_for(qltk.get_top_parent(parent))

        default_width = 600
        config_suffix = ""
        if len(songs) <= 1:
            default_width -= 200
            config_suffix += "single"
        self.set_default_size(default_width, 400)

        self.enable_window_tracking("quodlibet_properties",
                                    size_suffix=config_suffix)

        self.auto_save_on_change = config.getboolean(
                'editing', 'auto_save_changes', False)

        paned = ConfigRPaned("memory", "quodlibet_properties_pos", 0.4)
        notebook = qltk.Notebook()
        notebook.props.scrollable = True
        pages = []
        pages.extend([Ctr(self, library) for Ctr in
                      [EditTags, TagsFromPath, RenameFiles]])
        if len(songs) > 1:
            pages.append(TrackNumbers(self, library))
        for page in pages:
            page.show()
            notebook.append_page(page)

        fbasemodel = ObjectStore()
        fmodel = ObjectModelSort(model=fbasemodel)
        fview = HintedTreeView(model=fmodel)
        fview.connect('button-press-event', self.__pre_selection_changed)
        fview.set_rules_hint(True)
        selection = fview.get_selection()
        selection.set_mode(Gtk.SelectionMode.MULTIPLE)
        self.__save = None

        render = Gtk.CellRendererText()
        c1 = Gtk.TreeViewColumn(_('File'), render)
        if fview.supports_hints():
            render.set_property('ellipsize', Pango.EllipsizeMode.END)
        render.set_property('xpad', 3)

        def cell_data(column, cell, model, iter_, data):
            entry = model.get_value(iter_)
            cell.set_property('text', entry.name)

        c1.set_cell_data_func(render, cell_data)

        def sort_func(model, a, b, data):
            a = model.get_value(a)
            b = model.get_value(b)
            return cmp(a.name, b.name)

        fmodel.set_sort_func(100, sort_func)
        c1.set_sort_column_id(100)
        fview.append_column(c1)

        sw = ScrolledWindow()
        sw.add(fview)
        sw.set_shadow_type(Gtk.ShadowType.IN)
        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)

        # only show the list if there are is more than one song
        if len(songs) > 1:
            sw.show_all()

        paned.pack1(sw, shrink=False, resize=True)

        for song in songs:
            fbasemodel.append(row=[_ListEntry(song)])

        self.connect("changed", self.__on_changed)

        selection.select_all()
        paned.pack2(notebook, shrink=False, resize=True)

        csig = selection.connect('changed', self.__selection_changed)
        connect_destroy(library,
            'changed', self.__on_library_changed, fbasemodel, fview)
        connect_destroy(library,
            'removed', self.__on_library_removed, fbasemodel, selection, csig)

        self.emit('changed', songs)
        self.add(paned)
        paned.set_position(175)
        notebook.show()
        paned.show()

    def __init__(self, initial=None, filter=filesel_filter, folders=None):
        """
        initial -- a path to a file which should be shown initially
        filter -- a function which filters paths shown in the file list
        folders -- list of shown folders in the directory tree
        """

        super(FileSelector, self).__init__(
            orientation=Gtk.Orientation.VERTICAL)
        self.__filter = filter

        if initial is not None:
            assert is_fsnative(initial)

        if initial and os.path.isfile(initial):
            initial = os.path.dirname(initial)
        dirlist = DirectoryTree(initial, folders=folders)

        model = ObjectStore()
        filelist = AllTreeView(model=model)

        column = TreeViewColumn(title=_("Songs"))
        column.set_sizing(Gtk.TreeViewColumnSizing.AUTOSIZE)
        render = Gtk.CellRendererPixbuf()
        render.props.xpad = 3

        def cell_icon(column, cell, model, iter_, userdata):
            value = model.get_value(iter_)
            if is_image(value):
                cell.set_property('icon-name', Icons.IMAGE_X_GENERIC)
            else:
                cell.set_property('icon-name', Icons.AUDIO_X_GENERIC)

        column.set_cell_data_func(render, cell_icon)

        column.pack_start(render, False)
        render = Gtk.CellRendererText()
        if filelist.supports_hints():
            render.set_property('ellipsize', Pango.EllipsizeMode.END)
        column.pack_start(render, True)

        def cell_data(column, cell, model, iter_, userdata):
            value = model.get_value(iter_)
            cell.set_property('text', fsdecode(os.path.basename(value)))

        column.set_cell_data_func(render, cell_data)

        filelist.append_column(column)
        filelist.set_rules_hint(True)
        filelist.get_selection().set_mode(Gtk.SelectionMode.MULTIPLE)
        filelist.set_search_equal_func(search_func, False)
        filelist.set_search_column(0)

        self.__sig = filelist.get_selection().connect(
            'changed', self.__changed)

        dirlist.get_selection().connect(
            'changed', self.__dir_selection_changed, filelist)
        dirlist.get_selection().emit('changed')

        def select_all_files(view, path, col, fileselection):
            view.expand_row(path, False)
            fileselection.select_all()
        dirlist.connect('row-activated', select_all_files,
            filelist.get_selection())

        sw = ScrolledWindow()
        sw.add(dirlist)
        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
        sw.set_shadow_type(Gtk.ShadowType.IN)
        self.pack1(sw, resize=True)

        sw = ScrolledWindow()
        sw.add(filelist)
        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
        sw.set_shadow_type(Gtk.ShadowType.IN)
        self.pack2(sw, resize=True)

    def __init__(self, library, player, headless=False, restore_cb=None):
        super(QuodLibetWindow, self).__init__(dialog=False)

        self.__destroyed = False
        self.__update_title(player)
        self.set_default_size(600, 480)

        main_box = Gtk.VBox()
        self.add(main_box)
        self.side_book = qltk.Notebook()

        # get the playlist up before other stuff
        self.songlist = MainSongList(library, player)
        self.songlist.connect("key-press-event", self.__songlist_key_press)
        self.songlist.connect_after(
            'drag-data-received', self.__songlist_drag_data_recv)
        self.song_scroller = ScrolledWindow()
        self.song_scroller.set_policy(
            Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
        self.song_scroller.set_shadow_type(Gtk.ShadowType.IN)
        self.song_scroller.add(self.songlist)

        self.qexpander = QueueExpander(library, player)
        self.qexpander.set_no_show_all(True)
        self.qexpander.set_visible(config.getboolean("memory", "queue"))

        def on_queue_visible(qex, param):
            config.set("memory", "queue", str(qex.get_visible()))

        self.qexpander.connect("notify::visible", on_queue_visible)

        self.playlist = PlaylistMux(
            player, self.qexpander.model, self.songlist.model)

        self.__player = player
        # create main menubar, load/restore accelerator groups
        self.__library = library
        ui = self.__create_menu(player, library)
        accel_group = ui.get_accel_group()
        self.add_accel_group(accel_group)

        def scroll_and_jump(*args):
            self.__jump_to_current(True, None, True)

        keyval, mod = Gtk.accelerator_parse("<Primary><shift>J")
        accel_group.connect(keyval, mod, 0, scroll_and_jump)

        # custom accel map
        accel_fn = os.path.join(quodlibet.get_user_dir(), "accels")
        Gtk.AccelMap.load(accel_fn)
        # save right away so we fill the file with example comments of all
        # accels
        Gtk.AccelMap.save(accel_fn)

        menubar = ui.get_widget("/Menu")

        # Since https://git.gnome.org/browse/gtk+/commit/?id=b44df22895c79
        # toplevel menu items show an empty 16x16 image. While we don't
        # need image items there UIManager creates them by default.
        # Work around by removing the empty GtkImages
        for child in menubar.get_children():
            if isinstance(child, Gtk.ImageMenuItem):
                child.set_image(None)

        main_box.pack_start(menubar, False, True, 0)

        top_bar = TopBar(self, player, library)
        main_box.pack_start(top_bar, False, True, 0)
        self.top_bar = top_bar

        self.__browserbox = Align(bottom=3)
        self.__paned = paned = ConfigRHPaned("memory", "sidebar_pos", 0.25)
        paned.pack1(self.__browserbox, resize=True)
        # We'll pack2 when necessary (when the first sidebar plugin is set up)

        main_box.pack_start(paned, True, True, 0)

        play_order = PlayOrderWidget(self.songlist.model, player)
        statusbox = StatusBarBox(play_order, self.qexpander)
        self.order = play_order
        self.statusbar = statusbox.statusbar

        main_box.pack_start(
            Align(statusbox, border=3, top=-3),
            False, True, 0)

        self.songpane = SongListPaned(self.song_scroller, self.qexpander)
        self.songpane.show_all()

        try:
            orders = []
            for e in config.getstringlist('memory', 'sortby', []):
                orders.append((e[1:], int(e[0])))
        except ValueError:
            pass
        else:
            self.songlist.set_sort_orders(orders)

        self.browser = None
        self.ui = ui
#.........这里部分代码省略.........

    def __init__(self, library):
        super(PlaylistsBrowser, self).__init__(spacing=6)
        self.set_orientation(Gtk.Orientation.VERTICAL)
        self.__view = view = RCMHintedTreeView()
        self.__view.set_enable_search(True)
        self.__view.set_search_column(0)
        self.__view.set_search_equal_func(
            lambda model, col, key, iter, data:
            not model[iter][col].name.lower().startswith(key.lower()), None)
        self.__render = render = Gtk.CellRendererText()
        render.set_property('ellipsize', Pango.EllipsizeMode.END)
        render.connect('editing-started', self.__start_editing)
        render.connect('edited', self.__edited)
        col = Gtk.TreeViewColumn("Playlists", render)
        col.set_cell_data_func(render, PlaylistsBrowser.cell_data)
        view.append_column(col)
        view.set_model(self.__lists)
        view.set_rules_hint(True)
        view.set_headers_visible(False)
        swin = ScrolledWindow()
        swin.set_shadow_type(Gtk.ShadowType.IN)
        swin.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
        swin.add(view)
        self.pack_start(swin, True, True, 0)

        newpl = qltk.Button(_("_New"), Gtk.STOCK_NEW, Gtk.IconSize.MENU)
        newpl.connect('clicked', self.__new_playlist)

        importpl = qltk.Button(_("_Import"), Gtk.STOCK_ADD, Gtk.IconSize.MENU)
        importpl.connect('clicked', self.__import, library)
        hb = Gtk.HBox(spacing=6)
        hb.set_homogeneous(True)
        hb.pack_start(newpl, True, True, 0)
        hb.pack_start(importpl, True, True, 0)
        self.pack_start(Align(hb, left=3, bottom=3), False, True, 0)

        view.connect('popup-menu', self.__popup_menu, library)

        targets = [
            ("text/x-quodlibet-songs", Gtk.TargetFlags.SAME_APP, DND_QL),
            ("text/uri-list", 0, DND_URI_LIST),
            ("text/x-moz-url", 0, DND_MOZ_URL)
        ]
        targets = [Gtk.TargetEntry.new(*t) for t in targets]

        view.drag_dest_set(Gtk.DestDefaults.ALL, targets,
                           Gdk.DragAction.COPY)
        view.drag_source_set(Gdk.ModifierType.BUTTON1_MASK, targets[:2],
                             Gdk.DragAction.COPY)
        view.connect('drag-data-received', self.__drag_data_received, library)
        view.connect('drag-data-get', self.__drag_data_get)
        view.connect('drag-motion', self.__drag_motion)
        view.connect('drag-leave', self.__drag_leave)

        view.connect('row-activated', lambda *x: self.songs_activated())

        view.get_selection().connect('changed', self.activate)

        s = view.get_model().connect('row-changed', self.__check_current)
        connect_obj(self, 'destroy', view.get_model().disconnect, s)

        self.connect('key-press-event', self.__key_pressed)

        for child in self.get_children():
            child.show_all()

 def __embed_in_scrolledwin(self, view):
     swin = ScrolledWindow()
     swin.set_shadow_type(Gtk.ShadowType.IN)
     swin.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
     swin.add(view)
     self.pack_start(swin, True, True, 0)

    def __init__(self, menu, library, player):
        super(QueueExpander, self).__init__()
        sw = ScrolledWindow()
        sw.set_policy(gtk.POLICY_NEVER, gtk.POLICY_ALWAYS)
        sw.set_shadow_type(gtk.SHADOW_IN)
        self.queue = PlayQueue(library, player)
        sw.add(self.queue)
        hb = gtk.HBox(spacing=12)

        hb2 = gtk.HBox(spacing=3)
        state = gtk.image_new_from_stock(
            gtk.STOCK_MEDIA_STOP, gtk.ICON_SIZE_MENU)
        hb2.pack_start(state)

        l = gtk.Label(_("_Queue"))
        hb2.pack_start(l)
        hb.pack_start(hb2)
        l.set_use_underline(True)

        clear = gtk.image_new_from_stock(gtk.STOCK_CLEAR, gtk.ICON_SIZE_MENU)
        b = gtk.Button()
        b.add(clear)
        b.set_tooltip_text(_("Remove all songs from the queue"))
        b.connect('clicked', self.__clear_queue)
        b.hide()
        b.set_relief(gtk.RELIEF_NONE)
        hb.pack_start(b, expand=False, fill=False)

        l2 = gtk.Label()
        hb.pack_start(l2)

        cb = ConfigCheckButton(
            _("_Random"), "memory", "shufflequeue")
        cb.connect('toggled', self.__queue_shuffle, self.queue.model)
        cb.set_active(config.getboolean("memory", "shufflequeue"))
        hb.pack_start(cb)

        self.set_label_widget(hb)
        self.add(sw)
        self.connect_object('notify::expanded', self.__expand, cb, b)

        targets = [("text/x-quodlibet-songs", gtk.TARGET_SAME_APP, 1),
                   ("text/uri-list", 0, 2)]
        self.drag_dest_set(gtk.DEST_DEFAULT_ALL, targets, gtk.gdk.ACTION_COPY)
        self.connect('drag-motion', self.__motion)
        self.connect('drag-data-received', self.__drag_data_received)

        sel