예제 #1
0
    def build_widgets(self):

        self.services_column = ServicesColumn(self.display_controller,
                                              self.placement_controller, self)

        self.machines_column = MachinesColumn(self.display_controller,
                                              self.placement_controller, self)
        self.relations_column = RelationsColumn(self.display_controller,
                                                self.placement_controller,
                                                self, self.metadata_controller)
        self.charmstore_column = CharmstoreColumn(self.display_controller,
                                                  self.placement_controller,
                                                  self,
                                                  self.metadata_controller)
        self.options_column = OptionsColumn(self.display_controller,
                                            self.placement_controller, self,
                                            self.metadata_controller)

        self.machines_header = self.get_machines_header(self.machines_column)
        self.relations_header = self.get_relations_header()
        self.services_header = self.get_services_header()
        self.charmstore_header = self.get_charmstore_header(
            self.charmstore_column)
        self.options_header = self.get_options_header(self.options_column)

        cs = [self.services_header, self.charmstore_header]

        self.header_columns = Columns(cs, dividechars=2)

        self.columns = Columns([self.services_column, self.machines_column],
                               dividechars=2)

        self.deploy_button = MenuSelectButton("\nCommit\n",
                                              on_press=self.do_deploy)
        self.deploy_button_label = Text("Some charms use default")
        self.placement_edit_body_pile = Pile([self.columns])
        self.placement_edit_body = Filler(Padding(
            self.placement_edit_body_pile,
            align='center',
            width=('relative', 95)),
                                          valign='top')
        self.bundle_graph_text = Text("No graph to display yet.")
        self.bundle_graph_widget = Padding(self.bundle_graph_text, 'center',
                                           'pack')
        b = AttrMap(self.deploy_button, 'frame_header', 'button_primary focus')
        self.footer_grid = GridFlow(
            [self.deploy_button_label,
             Padding(b, width=28, align='center')], 28, 1, 1, 'right')
        f = AttrMap(self.footer_grid, 'frame_footer', 'frame_footer')

        self.frame = Frame(header=Pile([self.header_columns,
                                        HR()]),
                           body=self.placement_edit_body,
                           footer=f)
        return self.frame
class PlacementView(WidgetWrap):

    """
    Handles display of machines and services.

    displays nothing if self.controller is not set.
    set it to a PlacementController.

    :param do_deploy_cb: deploy callback from controller
    """

    def __init__(self, display_controller, placement_controller,
                 config, do_deploy_cb,
                 initial_state=UIState.CHARMSTORE_VIEW,
                 has_maas=False):
        self.display_controller = display_controller
        self.placement_controller = placement_controller
        self.config = config
        self.do_deploy_cb = do_deploy_cb
        self.state = initial_state
        self.has_maas = has_maas
        self.prev_state = None
        self.showing_overlay = False
        self.showing_graph_split = False
        self.show_scc_graph = False
        self.bundle = placement_controller.bundle
        self.metadata_controller = MetadataController(self.bundle, config)
        w = self.build_widgets()
        super().__init__(w)
        self.reset_selections(top=True)  # calls self.update

    def scroll_down(self):
        pass

    def scroll_up(self):
        pass

    def focus_footer(self):
        self.frame.focus_position = 'footer'
        self.footer_grid.focus_position = 1

    def handle_tab(self, backward):
        tabloop = ['headercol1', 'col1', 'headercol2', 'col2', 'footer']

        if not self.has_maas:
            tabloop.remove('headercol1')

        def goto_header_col1():
            self.frame.focus_position = 'header'
            self.header_columns.focus_position = 0

        def goto_header_col2():
            self.frame.focus_position = 'header'
            self.header_columns.focus_position = 1

        def goto_col1():
            self.frame.focus_position = 'body'
            self.columns.focus_position = 0

        def goto_col2():
            self.frame.focus_position = 'body'
            if self.state == UIState.PLACEMENT_EDITOR:
                self.focus_machines_column()
            elif self.state == UIState.RELATION_EDITOR:
                self.focus_relations_column()
            elif self.state == UIState.OPTIONS_EDITOR:
                self.focus_options_column()
            else:
                self.focus_charmstore_column()

        actions = {'headercol1': goto_header_col1,
                   'headercol2': goto_header_col2,
                   'col1': goto_col1,
                   'col2': goto_col2,
                   'footer': self.focus_footer}

        if self.frame.focus_position == 'header':
            cur = ['headercol1',
                   'headercol2'][self.header_columns.focus_position]
        elif self.frame.focus_position == 'footer':
            cur = 'footer'
        else:
            cur = ['col1', 'col2'][self.columns.focus_position]

        cur_idx = tabloop.index(cur)

        if backward:
            next_idx = cur_idx - 1
        else:
            next_idx = (cur_idx + 1) % len(tabloop)

        actions[tabloop[next_idx]]()

    def keypress(self, size, key):
        if key in ['tab', 'shift tab']:
            self.handle_tab('shift' in key)
            return key

        unhandled_key = self._w.keypress(size, key)
        if unhandled_key is None:
            return None
        elif unhandled_key in ['g', 'G']:
            if unhandled_key == 'G':
                self.show_scc_graph = True
            else:
                self.show_scc_graph = False
            self.showing_graph_split = not self.showing_graph_split
            if self.showing_graph_split:
                opts = self.placement_edit_body_pile.options()
                self.placement_edit_body_pile.contents.insert(
                    0, (self.bundle_graph_widget, opts))
            else:
                self.placement_edit_body_pile.contents.pop(0)
            self.update()
        else:
            return unhandled_key

    def get_services_header(self):
        b = PlainButton("Clear All Placements",
                        on_press=self.do_clear_all)
        self.clear_all_button = AttrMap(b,
                                        'button_secondary',
                                        'button_secondary focus')

        self.services_buttons = [self.clear_all_button]
        self.services_button_grid = GridFlow(self.services_buttons,
                                             36, 1, 0, 'center')

        ws = [Divider(), Text(("body", "Services"), align='center'),
              Divider()]
        if self.has_maas:
            ws.append(self.services_button_grid)

        return Pile(ws)

    def get_charmstore_header(self, charmstore_column):
        series = self.placement_controller.bundle.series
        self.charm_search_widget = CharmStoreSearchWidget(self.do_add_charm,
                                                          charmstore_column,
                                                          self.config,
                                                          series)
        self.charm_search_header_pile = Pile([Divider(),
                                              Text(("body", "Add Charms"),
                                                   align='center'),
                                              Divider(),
                                              self.charm_search_widget])

        return self.charm_search_header_pile

    def get_machines_header(self, machines_column):
        b = PlainButton("Open in Browser",
                        on_press=self.browse_maas)
        self.open_maas_button = AttrMap(b,
                                        'button_secondary',
                                        'button_secondary focus')
        self.maastitle = Text("Connected to MAAS")
        maastitle_widgets = Padding(Columns([self.maastitle,
                                             (22, self.open_maas_button)]),
                                    align='center',
                                    width='pack', left=2,
                                    right=2)

        f = machines_column.machines_list.handle_filter_change
        self.filter_edit_box = FilterBox(f)
        pl = [Divider(),
              Text(('body',
                    "Ready Machines {}".format(MetaScroll().get_text()[0])),
                   align='center'),
              Divider(),
              maastitle_widgets,
              Divider(),
              self.filter_edit_box]

        self.machines_header_pile = Pile(pl)
        return self.machines_header_pile

    def update_machines_header(self):
        maasinfo = self.placement_controller.maasinfo
        maasname = "'{}' <{}>".format(maasinfo['server_name'],
                                      maasinfo['server_hostname'])
        self.maastitle.set_text("Connected to MAAS {}".format(maasname))

    def _simple_header_widgets(self, title):
        b = PlainButton("Back to Charm Store",
                        on_press=self.show_default_view)
        self.back_to_mainview_button = AttrMap(b, 'button_secondary',
                                               'button_secondary focus')
        button_grid = GridFlow([self.back_to_mainview_button],
                               36, 1, 0, 'center')

        return [Divider(),
                Text(('body', title), align='center'),
                Divider(), button_grid]

    def get_relations_header(self):
        return Pile(self._simple_header_widgets("Relation Editor"))

    def get_options_header(self, options_column):
        simple_widgets = self._simple_header_widgets("Options Editor")
        fb = FilterBox(options_column.handle_filter_change,
                       info_text="Filter by option name")
        padded_fb = Padding(AttrMap(fb, 'filter', 'filter_focus'),
                            left=2, right=2)
        return Pile(simple_widgets + [padded_fb])

    def build_widgets(self):

        self.services_column = ServicesColumn(self.display_controller,
                                              self.placement_controller,
                                              self)

        self.machines_column = MachinesColumn(self.display_controller,
                                              self.placement_controller,
                                              self)
        self.relations_column = RelationsColumn(self.display_controller,
                                                self.placement_controller,
                                                self,
                                                self.metadata_controller)
        self.charmstore_column = CharmstoreColumn(self.display_controller,
                                                  self.placement_controller,
                                                  self,
                                                  self.metadata_controller)
        self.options_column = OptionsColumn(self.display_controller,
                                            self.placement_controller,
                                            self,
                                            self.metadata_controller)

        self.machines_header = self.get_machines_header(self.machines_column)
        self.relations_header = self.get_relations_header()
        self.services_header = self.get_services_header()
        self.charmstore_header = self.get_charmstore_header(
            self.charmstore_column)
        self.options_header = self.get_options_header(self.options_column)

        cs = [self.services_header, self.charmstore_header]

        self.header_columns = Columns(cs, dividechars=2)

        self.columns = Columns([self.services_column,
                                self.machines_column], dividechars=2)

        self.deploy_button = MenuSelectButton("\nCommit\n",
                                              on_press=self.do_deploy)
        self.deploy_button_label = Text("Some charms use default")
        self.placement_edit_body_pile = Pile([self.columns])
        self.placement_edit_body = Filler(Padding(
            self.placement_edit_body_pile,
            align='center',
            width=('relative', 95)),
            valign='top')
        self.bundle_graph_text = Text("No graph to display yet.")
        self.bundle_graph_widget = Padding(self.bundle_graph_text,
                                           'center', 'pack')
        b = AttrMap(self.deploy_button,
                    'frame_header',
                    'button_primary focus')
        self.footer_grid = GridFlow([self.deploy_button_label,
                                     Padding(b, width=28,
                                             align='center')],
                                    28, 1, 1, 'right')
        f = AttrMap(self.footer_grid,
                    'frame_footer',
                    'frame_footer')

        self.frame = Frame(header=Pile([self.header_columns, HR()]),
                           body=self.placement_edit_body,
                           footer=f)
        return self.frame

    def update(self):
        if self.prev_state != self.state:
            h_opts = self.header_columns.options()
            c_opts = self.columns.options()

            if self.state == UIState.PLACEMENT_EDITOR:
                self.update_machines_header()
                self.header_columns.contents[-1] = (self.machines_header,
                                                    h_opts)
                self.columns.contents[-1] = (self.machines_column, c_opts)

            elif self.state == UIState.RELATION_EDITOR:
                self.header_columns.contents[-1] = (self.relations_header,
                                                    h_opts)
                self.columns.contents[-1] = (self.relations_column, h_opts)
            elif self.state == UIState.CHARMSTORE_VIEW:
                self.header_columns.contents[-1] = (self.charmstore_header,
                                                    h_opts)
                self.columns.contents[-1] = (self.charmstore_column, h_opts)
            elif self.state == UIState.OPTIONS_EDITOR:
                self.header_columns.contents[-1] = (self.options_header,
                                                    h_opts)
                self.columns.contents[-1] = (self.options_column, h_opts)

            self.prev_state = self.state

        self.services_column.update()

        if self.state == UIState.PLACEMENT_EDITOR:
            self.machines_column.update()
        elif self.state == UIState.RELATION_EDITOR:
            self.relations_column.update()
        elif self.state == UIState.OPTIONS_EDITOR:
            self.options_column.update()
        else:
            self.charmstore_column.update()

        unplaced = self.placement_controller.unassigned_undeployed_services()
        all = self.placement_controller.services()
        n_subs_in_unplaced = len([c for c in unplaced if c.subordinate])
        n_subs_in_all = len([c for c in all if c.subordinate])

        n_total = len(all) - n_subs_in_all
        remaining = len(unplaced) - n_subs_in_unplaced
        if remaining > 0:
            dmsg = "\nAuto-assigning {}/{} services".format(remaining,
                                                            n_total)
        else:
            dmsg = ""
        self.deploy_button_label.set_text(dmsg)

        if self.showing_graph_split:
            bundle = self.placement_controller.bundle
            if self.show_scc_graph:
                gtext = scc_graph_for_bundle(bundle, self.metadata_controller)
            else:
                gtext = graph_for_bundle(bundle, self.metadata_controller)
            if gtext == "":
                gtext = "No graph to display yet."
            self.bundle_graph_text.set_text(gtext)

    def browse_maas(self, sender):

        bc = self.config.juju_env['bootstrap-config']
        try:
            p = Popen(["sensible-browser", bc['maas-server']],
                      stdout=PIPE, stderr=PIPE)
            outs, errs = p.communicate(timeout=5)

        except TimeoutExpired:
            # went five seconds without an error, so we assume it's
            # OK. Don't kill it, just let it go:
            return
        e = errs.decode('utf-8')
        msg = "Error opening '{}' in a browser:\n{}".format(bc['name'], e)

        w = InfoDialogWidget(msg, self.remove_overlay)
        self.show_overlay(w)

    def do_clear_all(self, sender):
        self.placement_controller.clear_all_assignments()

    def do_add_charm(self, charm_name, charm_dict):
        """Add new service and focus its widget.

        """
        assert(self.state == UIState.CHARMSTORE_VIEW)

        def done_cb(f):
            csid = CharmStoreID(charm_dict['Id'])
            id_no_rev = csid.as_str_without_rev()
            info = self.metadata_controller.get_charm_info(id_no_rev,
                                                           lambda _: None)
            is_subordinate = info["Meta"]["charm-metadata"].get(
                "Subordinate", False)
            service_name = self.placement_controller.add_new_service(
                charm_name, charm_dict, is_subordinate=is_subordinate)
            self.frame.focus_position = 'body'
            self.columns.focus_position = 0
            self.update()
            self.services_column.select_service(service_name)

        # TODO MMCC: need a 'loading' indicator to start here
        self.metadata_controller.load([charm_dict['Id']], done_cb)

    def do_add_bundle(self, bundle_dict):
        assert(self.state == UIState.CHARMSTORE_VIEW)
        _, new_services, _ = self.placement_controller.merge_bundle(
            bundle_dict)
        self.frame.focus_position = 'body'
        self.columns.focus_position = 0
        charms = list(set([s.charm_source for s in new_services]))
        self.metadata_controller.load(charms)
        self.update()
        ss = sorted(new_services,
                    key=attrgetter('service_name'))
        first_service = ss[0].service_name
        self.services_column.select_service(first_service)

    def do_clear_machine(self, sender, machine):
        self.placement_controller.clear_assignments(machine)

    def clear_selections(self):
        self.services_column.clear_selections()
        self.machines_column.clear_selections()

    def reset_selections(self, top=False):
        self.clear_selections()
        self.state = UIState.CHARMSTORE_VIEW
        self.update()
        self.columns.focus_position = 0

        if top:
            self.services_column.focus_top()
        else:
            self.services_column.focus_next()

    def focus_machines_column(self):
        self.columns.focus_position = 1
        self.machines_column.focus_prev_or_top()

    def focus_relations_column(self):
        self.columns.focus_position = 1
        self.relations_column.focus_prev_or_top()

    def focus_options_column(self):
        self.columns.focus_position = 1
        self.options_column.focus_prev_or_top()

    def focus_charmstore_column(self):
        self.columns.focus_position = 1
        self.charmstore_column.focus_prev_or_top()

    def edit_placement(self):
        self.state = UIState.PLACEMENT_EDITOR
        self.update()
        self.focus_machines_column()

    def show_default_view(self, *args):
        self.state = UIState.CHARMSTORE_VIEW
        self.update()

    def edit_relations(self, service):
        self.state = UIState.RELATION_EDITOR
        self.relations_column.set_service(service)
        self.update()
        self.focus_relations_column()

    def edit_options(self, service):
        self.state = UIState.OPTIONS_EDITOR
        self.options_column.set_service(service)
        self.update()
        self.focus_options_column()

    def do_deploy(self, sender):
        self.do_deploy_cb()

    def show_overlay(self, overlay_widget):
        if not self.showing_overlay:
            self.orig_w = self._w
        self._w = Overlay(top_w=overlay_widget,
                          bottom_w=self._w,
                          align='center',
                          width=('relative', 60),
                          min_width=80,
                          valign='middle',
                          height='pack')
        self.showing_overlay = True

    def remove_overlay(self, overlay_widget):
        # urwid note: we could also get orig_w as
        # self._w.contents[0][0], but this is clearer:
        self._w = self.orig_w
        self.showing_overlay = False
    def build_widgets(self):

        self.services_column = ServicesColumn(self.display_controller,
                                              self.placement_controller,
                                              self)

        self.machines_column = MachinesColumn(self.display_controller,
                                              self.placement_controller,
                                              self)
        self.relations_column = RelationsColumn(self.display_controller,
                                                self.placement_controller,
                                                self,
                                                self.metadata_controller)
        self.charmstore_column = CharmstoreColumn(self.display_controller,
                                                  self.placement_controller,
                                                  self,
                                                  self.metadata_controller)
        self.options_column = OptionsColumn(self.display_controller,
                                            self.placement_controller,
                                            self,
                                            self.metadata_controller)

        self.machines_header = self.get_machines_header(self.machines_column)
        self.relations_header = self.get_relations_header()
        self.services_header = self.get_services_header()
        self.charmstore_header = self.get_charmstore_header(
            self.charmstore_column)
        self.options_header = self.get_options_header(self.options_column)

        cs = [self.services_header, self.charmstore_header]

        self.header_columns = Columns(cs, dividechars=2)

        self.columns = Columns([self.services_column,
                                self.machines_column], dividechars=2)

        self.deploy_button = MenuSelectButton("\nCommit\n",
                                              on_press=self.do_deploy)
        self.deploy_button_label = Text("Some charms use default")
        self.placement_edit_body_pile = Pile([self.columns])
        self.placement_edit_body = Filler(Padding(
            self.placement_edit_body_pile,
            align='center',
            width=('relative', 95)),
            valign='top')
        self.bundle_graph_text = Text("No graph to display yet.")
        self.bundle_graph_widget = Padding(self.bundle_graph_text,
                                           'center', 'pack')
        b = AttrMap(self.deploy_button,
                    'frame_header',
                    'button_primary focus')
        self.footer_grid = GridFlow([self.deploy_button_label,
                                     Padding(b, width=28,
                                             align='center')],
                                    28, 1, 1, 'right')
        f = AttrMap(self.footer_grid,
                    'frame_footer',
                    'frame_footer')

        self.frame = Frame(header=Pile([self.header_columns, HR()]),
                           body=self.placement_edit_body,
                           footer=f)
        return self.frame
예제 #4
0
class PlacementView(WidgetWrap):
    """
    Handles display of machines and services.

    displays nothing if self.controller is not set.
    set it to a PlacementController.

    :param do_deploy_cb: deploy callback from controller
    """
    def __init__(self,
                 display_controller,
                 placement_controller,
                 config,
                 do_deploy_cb,
                 initial_state=UIState.CHARMSTORE_VIEW,
                 has_maas=False):
        self.display_controller = display_controller
        self.placement_controller = placement_controller
        self.config = config
        self.do_deploy_cb = do_deploy_cb
        self.state = initial_state
        self.has_maas = has_maas
        self.prev_state = None
        self.showing_overlay = False
        self.showing_graph_split = False
        self.show_scc_graph = False
        self.bundle = placement_controller.bundle
        self.metadata_controller = MetadataController(self.bundle, config)
        w = self.build_widgets()
        super().__init__(w)
        self.reset_selections(top=True)  # calls self.update

    def scroll_down(self):
        pass

    def scroll_up(self):
        pass

    def focus_footer(self):
        self.frame.focus_position = 'footer'
        self.footer_grid.focus_position = 1

    def handle_tab(self, backward):
        tabloop = ['headercol1', 'col1', 'headercol2', 'col2', 'footer']

        if not self.has_maas:
            tabloop.remove('headercol1')

        def goto_header_col1():
            self.frame.focus_position = 'header'
            self.header_columns.focus_position = 0

        def goto_header_col2():
            self.frame.focus_position = 'header'
            self.header_columns.focus_position = 1

        def goto_col1():
            self.frame.focus_position = 'body'
            self.columns.focus_position = 0

        def goto_col2():
            self.frame.focus_position = 'body'
            if self.state == UIState.PLACEMENT_EDITOR:
                self.focus_machines_column()
            elif self.state == UIState.RELATION_EDITOR:
                self.focus_relations_column()
            elif self.state == UIState.OPTIONS_EDITOR:
                self.focus_options_column()
            else:
                self.focus_charmstore_column()

        actions = {
            'headercol1': goto_header_col1,
            'headercol2': goto_header_col2,
            'col1': goto_col1,
            'col2': goto_col2,
            'footer': self.focus_footer
        }

        if self.frame.focus_position == 'header':
            cur = ['headercol1',
                   'headercol2'][self.header_columns.focus_position]
        elif self.frame.focus_position == 'footer':
            cur = 'footer'
        else:
            cur = ['col1', 'col2'][self.columns.focus_position]

        cur_idx = tabloop.index(cur)

        if backward:
            next_idx = cur_idx - 1
        else:
            next_idx = (cur_idx + 1) % len(tabloop)

        actions[tabloop[next_idx]]()

    def keypress(self, size, key):
        if key in ['tab', 'shift tab']:
            self.handle_tab('shift' in key)
            return key

        unhandled_key = self._w.keypress(size, key)
        if unhandled_key is None:
            return None
        elif unhandled_key in ['g', 'G']:
            if unhandled_key == 'G':
                self.show_scc_graph = True
            else:
                self.show_scc_graph = False
            self.showing_graph_split = not self.showing_graph_split
            if self.showing_graph_split:
                opts = self.placement_edit_body_pile.options()
                self.placement_edit_body_pile.contents.insert(
                    0, (self.bundle_graph_widget, opts))
            else:
                self.placement_edit_body_pile.contents.pop(0)
            self.update()
        else:
            return unhandled_key

    def get_services_header(self):
        b = PlainButton("Clear All Placements", on_press=self.do_clear_all)
        self.clear_all_button = AttrMap(b, 'button_secondary',
                                        'button_secondary focus')

        self.services_buttons = [self.clear_all_button]
        self.services_button_grid = GridFlow(self.services_buttons, 36, 1, 0,
                                             'center')

        ws = [Divider(), Text(("body", "Services"), align='center'), Divider()]
        if self.has_maas:
            ws.append(self.services_button_grid)

        return Pile(ws)

    def get_charmstore_header(self, charmstore_column):
        series = self.placement_controller.bundle.series
        self.charm_search_widget = CharmStoreSearchWidget(
            self.do_add_charm, charmstore_column, self.config, series)
        self.charm_search_header_pile = Pile([
            Divider(),
            Text(("body", "Add Charms"), align='center'),
            Divider(), self.charm_search_widget
        ])

        return self.charm_search_header_pile

    def get_machines_header(self, machines_column):
        b = PlainButton("Open in Browser", on_press=self.browse_maas)
        self.open_maas_button = AttrMap(b, 'button_secondary',
                                        'button_secondary focus')
        self.maastitle = Text("Connected to MAAS")
        maastitle_widgets = Padding(Columns(
            [self.maastitle, (22, self.open_maas_button)]),
                                    align='center',
                                    width='pack',
                                    left=2,
                                    right=2)

        f = machines_column.machines_list.handle_filter_change
        self.filter_edit_box = FilterBox(f)
        pl = [
            Divider(),
            Text(('body', "Ready Machines {}".format(
                MetaScroll().get_text()[0])),
                 align='center'),
            Divider(), maastitle_widgets,
            Divider(), self.filter_edit_box
        ]

        self.machines_header_pile = Pile(pl)
        return self.machines_header_pile

    def update_machines_header(self):
        maasinfo = self.placement_controller.maasinfo
        maasname = "'{}' <{}>".format(maasinfo['server_name'],
                                      maasinfo['server_hostname'])
        self.maastitle.set_text("Connected to MAAS {}".format(maasname))

    def _simple_header_widgets(self, title):
        b = PlainButton("Back to Charm Store", on_press=self.show_default_view)
        self.back_to_mainview_button = AttrMap(b, 'button_secondary',
                                               'button_secondary focus')
        button_grid = GridFlow([self.back_to_mainview_button], 36, 1, 0,
                               'center')

        return [
            Divider(),
            Text(('body', title), align='center'),
            Divider(), button_grid
        ]

    def get_relations_header(self):
        return Pile(self._simple_header_widgets("Relation Editor"))

    def get_options_header(self, options_column):
        simple_widgets = self._simple_header_widgets("Options Editor")
        fb = FilterBox(options_column.handle_filter_change,
                       info_text="Filter by option name")
        padded_fb = Padding(AttrMap(fb, 'filter', 'filter_focus'),
                            left=2,
                            right=2)
        return Pile(simple_widgets + [padded_fb])

    def build_widgets(self):

        self.services_column = ServicesColumn(self.display_controller,
                                              self.placement_controller, self)

        self.machines_column = MachinesColumn(self.display_controller,
                                              self.placement_controller, self)
        self.relations_column = RelationsColumn(self.display_controller,
                                                self.placement_controller,
                                                self, self.metadata_controller)
        self.charmstore_column = CharmstoreColumn(self.display_controller,
                                                  self.placement_controller,
                                                  self,
                                                  self.metadata_controller)
        self.options_column = OptionsColumn(self.display_controller,
                                            self.placement_controller, self,
                                            self.metadata_controller)

        self.machines_header = self.get_machines_header(self.machines_column)
        self.relations_header = self.get_relations_header()
        self.services_header = self.get_services_header()
        self.charmstore_header = self.get_charmstore_header(
            self.charmstore_column)
        self.options_header = self.get_options_header(self.options_column)

        cs = [self.services_header, self.charmstore_header]

        self.header_columns = Columns(cs, dividechars=2)

        self.columns = Columns([self.services_column, self.machines_column],
                               dividechars=2)

        self.deploy_button = MenuSelectButton("\nCommit\n",
                                              on_press=self.do_deploy)
        self.deploy_button_label = Text("Some charms use default")
        self.placement_edit_body_pile = Pile([self.columns])
        self.placement_edit_body = Filler(Padding(
            self.placement_edit_body_pile,
            align='center',
            width=('relative', 95)),
                                          valign='top')
        self.bundle_graph_text = Text("No graph to display yet.")
        self.bundle_graph_widget = Padding(self.bundle_graph_text, 'center',
                                           'pack')
        b = AttrMap(self.deploy_button, 'frame_header', 'button_primary focus')
        self.footer_grid = GridFlow(
            [self.deploy_button_label,
             Padding(b, width=28, align='center')], 28, 1, 1, 'right')
        f = AttrMap(self.footer_grid, 'frame_footer', 'frame_footer')

        self.frame = Frame(header=Pile([self.header_columns,
                                        HR()]),
                           body=self.placement_edit_body,
                           footer=f)
        return self.frame

    def update(self):
        if self.prev_state != self.state:
            h_opts = self.header_columns.options()
            c_opts = self.columns.options()

            if self.state == UIState.PLACEMENT_EDITOR:
                self.update_machines_header()
                self.header_columns.contents[-1] = (self.machines_header,
                                                    h_opts)
                self.columns.contents[-1] = (self.machines_column, c_opts)

            elif self.state == UIState.RELATION_EDITOR:
                self.header_columns.contents[-1] = (self.relations_header,
                                                    h_opts)
                self.columns.contents[-1] = (self.relations_column, h_opts)
            elif self.state == UIState.CHARMSTORE_VIEW:
                self.header_columns.contents[-1] = (self.charmstore_header,
                                                    h_opts)
                self.columns.contents[-1] = (self.charmstore_column, h_opts)
            elif self.state == UIState.OPTIONS_EDITOR:
                self.header_columns.contents[-1] = (self.options_header,
                                                    h_opts)
                self.columns.contents[-1] = (self.options_column, h_opts)

            self.prev_state = self.state

        self.services_column.update()

        if self.state == UIState.PLACEMENT_EDITOR:
            self.machines_column.update()
        elif self.state == UIState.RELATION_EDITOR:
            self.relations_column.update()
        elif self.state == UIState.OPTIONS_EDITOR:
            self.options_column.update()
        else:
            self.charmstore_column.update()

        unplaced = self.placement_controller.unassigned_undeployed_services()
        all = self.placement_controller.services()
        n_subs_in_unplaced = len([c for c in unplaced if c.subordinate])
        n_subs_in_all = len([c for c in all if c.subordinate])

        n_total = len(all) - n_subs_in_all
        remaining = len(unplaced) - n_subs_in_unplaced
        if remaining > 0:
            dmsg = "\nAuto-assigning {}/{} services".format(remaining, n_total)
        else:
            dmsg = ""
        self.deploy_button_label.set_text(dmsg)

        if self.showing_graph_split:
            bundle = self.placement_controller.bundle
            if self.show_scc_graph:
                gtext = scc_graph_for_bundle(bundle, self.metadata_controller)
            else:
                gtext = graph_for_bundle(bundle, self.metadata_controller)
            if gtext == "":
                gtext = "No graph to display yet."
            self.bundle_graph_text.set_text(gtext)

    def browse_maas(self, sender):

        bc = self.config.juju_env['bootstrap-config']
        try:
            p = Popen(["sensible-browser", bc['maas-server']],
                      stdout=PIPE,
                      stderr=PIPE)
            outs, errs = p.communicate(timeout=5)

        except TimeoutExpired:
            # went five seconds without an error, so we assume it's
            # OK. Don't kill it, just let it go:
            return
        e = errs.decode('utf-8')
        msg = "Error opening '{}' in a browser:\n{}".format(bc['name'], e)

        w = InfoDialogWidget(msg, self.remove_overlay)
        self.show_overlay(w)

    def do_clear_all(self, sender):
        self.placement_controller.clear_all_assignments()

    def do_add_charm(self, charm_name, charm_dict):
        """Add new service and focus its widget.

        """
        assert (self.state == UIState.CHARMSTORE_VIEW)

        def done_cb(f):
            csid = CharmStoreID(charm_dict['Id'])
            id_no_rev = csid.as_str_without_rev()
            info = self.metadata_controller.get_charm_info(id_no_rev)
            is_subordinate = info["Meta"]["charm-metadata"].get(
                "Subordinate", False)
            service_name = self.placement_controller.add_new_service(
                charm_name, charm_dict, is_subordinate=is_subordinate)
            self.frame.focus_position = 'body'
            self.columns.focus_position = 0
            self.update()
            self.services_column.select_service(service_name)

        # TODO MMCC: need a 'loading' indicator to start here
        self.metadata_controller.load([charm_dict['Id']], done_cb)

    def do_add_bundle(self, bundle_dict):
        assert (self.state == UIState.CHARMSTORE_VIEW)
        _, new_services, _ = self.placement_controller.merge_bundle(
            bundle_dict)
        self.frame.focus_position = 'body'
        self.columns.focus_position = 0
        charms = list(set([s.charm_source for s in new_services]))
        self.metadata_controller.load(charms)
        self.update()
        ss = sorted(new_services, key=attrgetter('service_name'))
        first_service = ss[0].service_name
        self.services_column.select_service(first_service)

    def do_clear_machine(self, sender, machine):
        self.placement_controller.clear_assignments(machine)

    def clear_selections(self):
        self.services_column.clear_selections()
        self.machines_column.clear_selections()

    def reset_selections(self, top=False):
        self.clear_selections()
        self.state = UIState.CHARMSTORE_VIEW
        self.update()
        self.columns.focus_position = 0

        if top:
            self.services_column.focus_top()
        else:
            self.services_column.focus_next()

    def focus_machines_column(self):
        self.columns.focus_position = 1
        self.machines_column.focus_prev_or_top()

    def focus_relations_column(self):
        self.columns.focus_position = 1
        self.relations_column.focus_prev_or_top()

    def focus_options_column(self):
        self.columns.focus_position = 1
        self.options_column.focus_prev_or_top()

    def focus_charmstore_column(self):
        self.columns.focus_position = 1
        self.charmstore_column.focus_prev_or_top()

    def edit_placement(self):
        self.state = UIState.PLACEMENT_EDITOR
        self.update()
        self.focus_machines_column()

    def show_default_view(self, *args):
        self.state = UIState.CHARMSTORE_VIEW
        self.update()

    def edit_relations(self, service):
        self.state = UIState.RELATION_EDITOR
        self.relations_column.set_service(service)
        self.update()
        self.focus_relations_column()

    def edit_options(self, service):
        self.state = UIState.OPTIONS_EDITOR
        self.options_column.set_service(service)
        self.update()
        self.focus_options_column()

    def do_deploy(self, sender):
        self.do_deploy_cb()

    def show_overlay(self, overlay_widget):
        if not self.showing_overlay:
            self.orig_w = self._w
        self._w = Overlay(top_w=overlay_widget,
                          bottom_w=self._w,
                          align='center',
                          width=('relative', 60),
                          min_width=80,
                          valign='middle',
                          height='pack')
        self.showing_overlay = True

    def remove_overlay(self, overlay_widget):
        # urwid note: we could also get orig_w as
        # self._w.contents[0][0], but this is clearer:
        self._w = self.orig_w
        self.showing_overlay = False