How to use the ginga.gw.Widgets.HBox function in ginga

self.top.add_callback('close', self.closed)

        vbox = Widgets.VBox()

        menubar = Widgets.Menubar()
        clockmenu = menubar.add_name('Clock')
        item = clockmenu.add_name("Quit")
        item.add_callback('activated', lambda *args: self.quit())
        vbox.add_widget(menubar, stretch=0)

        self.grid = Widgets.GridBox()
        self.grid.set_border_width(1)
        self.grid.set_spacing(2)
        vbox.add_widget(self.grid, stretch=1)

        hbox = Widgets.HBox()

        self.timezone_label = Widgets.Label('TimeZone')
        self.county_timezone = Widgets.ComboBox(editable=True)

        # make a giant list of time zones
        zones = [timezone for timezones in pytz.country_timezones.values()
                 for timezone in timezones]
        zones.sort()
        for timezone in zones:
            self.county_timezone.append_text(timezone)

        # also let user set timezone by UTC offset
        self.location_label = Widgets.Label('Location')
        self.location = Widgets.TextEntry()
        self.location.set_tooltip("Type a label to denote this UTC offset")
        #self.location.set_length(10)

wclear = Widgets.Button("Clear Canvas")
        wclear.add_callback('activated', lambda w: self.clear_canvas())
        wopen = Widgets.Button("Open File")
        wopen.add_callback('activated', lambda w: self.open_file())
        wquit = Widgets.Button("Quit")
        wquit.add_callback('activated', lambda w: self.quit())

        hbox.add_widget(Widgets.Label(''), stretch=1)
        for w in (wopen, wdrawtype, wdrawcolor, wfill,
                  Widgets.Label('Alpha:'), walpha, wclear, wquit):
            hbox.add_widget(w, stretch=0)

        vbox.add_widget(hbox, stretch=0)

        mode = self.canvas.get_draw_mode()
        hbox = Widgets.HBox()
        btn1 = Widgets.RadioButton("Draw")
        btn1.set_state(mode == 'draw')
        btn1.add_callback('activated', lambda w, val: self.set_mode_cb('draw', val))
        btn1.set_tooltip("Choose this to draw on the canvas")
        hbox.add_widget(btn1)

        btn2 = Widgets.RadioButton("Edit", group=btn1)
        btn2.set_state(mode == 'edit')
        btn2.add_callback('activated', lambda w, val: self.set_mode_cb('edit', val))
        btn2.set_tooltip("Choose this to edit things on the canvas")
        hbox.add_widget(btn2)

        ## btn3 = Widgets.CheckBox("I'm using a trackpad")
        ## btn3.add_callback('activated', lambda w, tf: self.use_trackpad_cb(tf))
        ## hbox.add_widget(btn3)

tabnames = self.ds.get_tabnames(group)
        if tabname in tabnames:
            # tab is already up somewhere
            return

        vbox = Widgets.VBox()
        vbox.set_margins(4, 4, 4, 4)
        vbox.set_spacing(2)

        msg_font = self.get_font('fixed', 12)
        tw = Widgets.TextArea(wrap=False, editable=False)
        tw.set_font(msg_font)
        tw.set_text(help_txt)
        vbox.add_widget(tw, stretch=1)

        btns = Widgets.HBox()
        btns.set_border_width(4)
        btns.set_spacing(3)

        def _close_cb(w):
            self.ds.remove_tab(tabname)

        btn = Widgets.Button("Close")
        btn.add_callback('activated', _close_cb)
        btns.add_widget(btn, stretch=0)
        btns.add_widget(Widgets.Label(''), stretch=1)

        vbox.add_widget(btns, stretch=0)

        self.ds.add_tab(wsname, vbox, group, tabname)
        self.ds.raise_tab(tabname)

combobox.set_tooltip("Rendering intent for soft proofing")

        value = self.t_.get('icc_black_point_compensation', False)
        b.black_point_compensation.set_state(value)
        b.black_point_compensation.add_callback(
            'activated', self.set_icc_profile_cb)
        b.black_point_compensation.set_tooltip("Use black point compensation")

        fr = Widgets.Frame()
        fr.set_widget(w)
        exp.set_widget(fr)
        vbox.add_widget(exp, stretch=0)

        top.add_widget(sw, stretch=1)

        btns = Widgets.HBox()
        btns.set_spacing(4)
        btns.set_border_width(4)

        btn = Widgets.Button("Close")
        btn.add_callback('activated', lambda w: self.close())
        btns.add_widget(btn)
        btn = Widgets.Button("Help")
        btn.add_callback('activated', lambda w: self.help())
        btns.add_widget(btn, stretch=0)
        btn = Widgets.Button("Save Settings")
        btn.add_callback('activated', lambda w: self.save_preferences())
        btns.add_widget(btn)
        btns.add_widget(Widgets.Label(''), stretch=1)
        top.add_widget(btns, stretch=0)

        container.add_widget(top, stretch=1)

captions = (('Auto scroll', 'checkbutton', 'Clear', 'button'),
                    )
        w, b = Widgets.build_info(captions)
        self.w.update(b)

        b.auto_scroll.set_tooltip(
            "Scroll the thumbs window when new images arrive")
        b.clear.set_tooltip("Remove all current thumbnails")
        b.clear.add_callback('activated', lambda w: self.clear())
        auto_scroll = self.settings.get('auto_scroll', False)
        b.auto_scroll.set_state(auto_scroll)
        vbox.add_widget(w, stretch=0)

        if self.settings.get('closeable', False):
            btns = Widgets.HBox()
            btns.set_border_width(4)
            btns.set_spacing(4)

            btn = Widgets.Button("Close")
            btn.add_callback('activated', lambda w: self.close())
            btns.add_widget(btn)
            btn = Widgets.Button("Help")
            btn.add_callback('activated', lambda w: self.help())
            btns.add_widget(btn, stretch=0)
            btns.add_widget(Widgets.Label(''), stretch=1)
            vbox.add_widget(btns, stretch=0)

        container.add_widget(vbox, stretch=1)

        self.gui_up = True

('X:', 'label', 'X', 'llabel'),
                    ('Y:', 'label', 'Y', 'llabel'),
                    ('Image-X:', 'label', 'Image_X', 'llabel'),
                    ('Image-Y:', 'label', 'Image_Y', 'llabel'),
                    ('Value:', 'label', 'Value', 'llabel'),
                    ('RA:', 'label', 'RA', 'llabel'),
                    ('DEC:', 'label', 'DEC', 'llabel'),
                    ('Equinox:', 'label', 'Equinox', 'llabel'),
                    ('Dimensions:', 'label', 'Dimensions', 'llabel'),
                    ('Min:', 'label', 'Min', 'llabel'),
                    ('Max:', 'label', 'Max', 'llabel'),
                    )
        w, b = Widgets.build_info(captions)

        col = Widgets.VBox()
        row = Widgets.HBox()
        row.set_spacing(0)
        row.set_border_width(0)
        row.add_widget(w, stretch=0)
        row.add_widget(Widgets.Label(''), stretch=1)
        col.add_widget(row, stretch=0)
        col.add_widget(Widgets.Label(''), stretch=1)
        sw2 = Widgets.ScrollArea()
        sw2.set_widget(col)
        vbox.add_widget(sw2, stretch=1)

        captions = (('Channel:', 'label', 'Channel', 'llabel'),
                    ('Zoom:', 'label', 'Zoom', 'llabel'),
                    ('Cut Low:', 'label', 'Cut Low Value', 'llabel',
                     'Cut Low', 'entry'),
                    ('Cut High:', 'label', 'Cut High Value', 'llabel',
                     'Cut High', 'entry'),

def build_gui(self, container):

        hbox = Widgets.HBox()
        hbox.set_border_width(0)
        hbox.set_spacing(2)

        cbox1 = Widgets.ComboBox()
        self.w.channel = cbox1
        cbox1.set_tooltip("Select a channel")
        cbox1.add_callback('activated', self.channel_select_cb)
        if self.settings.get('show_channel_control', True):
            hbox.add_widget(cbox1, stretch=0)

        self.use_popup = self.settings.get('use_popup_menu', True)
        opmenu = Widgets.Menu()
        btn = Widgets.Button("Operation")
        btn.set_tooltip("Invoke operation")
        btn.add_callback('activated', self.invoke_popup_cb)
        if not self.use_popup:

self.set_match_cb, 'transforms')
        self.w.match_transforms.set_tooltip("Match transforms of reference image")
        self.w.match_rotation.set_state(self._match['rotation'])
        self.w.match_rotation.add_callback('activated',
                                           self.set_match_cb, 'rotation')
        self.w.match_rotation.set_tooltip("Match rotation of reference image")

        fr.set_widget(w)
        vbox.add_widget(fr, stretch=0)

        spacer = Widgets.Label('')
        vbox.add_widget(spacer, stretch=1)

        top.add_widget(sw, stretch=1)

        btns = Widgets.HBox()
        btns.set_spacing(3)

        btn = Widgets.Button("Close")
        btn.add_callback('activated', lambda w: self.close())
        btns.add_widget(btn, stretch=0)
        btn = Widgets.Button("Help")
        btn.add_callback('activated', lambda w: self.help())
        btns.add_widget(btn, stretch=0)
        btns.add_widget(Widgets.Label(''), stretch=1)
        top.add_widget(btns, stretch=0)

        container.add_widget(top, stretch=1)

        self.gui_up = True
        self._reset_channels_gui()

canvas.set_surface(vw)
        self.canvas = canvas
        # add canvas to view
        private_canvas = vw.get_canvas()
        private_canvas.add(canvas)

        # little hack because we don't have a way yet to ask for this
        # variation of back end through ginga.toolkit
        ww = Widgets.wrap(vw.get_widget())

        vbox = Widgets.VBox()
        vbox.set_border_width(2)
        vbox.set_spacing(1)
        vbox.add_widget(ww, stretch=1)

        hbox = Widgets.HBox()
        hbox.set_border_width(4)

        wquit = Widgets.Button("Quit")
        wquit.add_callback('activated', self.quit)
        hbox.add_widget(Widgets.Label(''), stretch=1)
        hbox.add_widget(wquit)

        vbox.add_widget(hbox)

        self.top.set_widget(vbox)

mode = 'blink channels'
        if not self.blink_channels:
            mode = 'blink images in channel'
        b.mode.set_text(mode)

        vbox2.add_widget(w, stretch=0)

        fr.set_widget(vbox2)
        vbox.add_widget(fr, stretch=0)

        spacer = Widgets.Label('')
        vbox.add_widget(spacer, stretch=1)

        top.add_widget(sw, stretch=1)

        btns = Widgets.HBox()
        btns.set_spacing(3)

        btn = Widgets.Button("Close")
        btn.add_callback('activated', lambda w: self.close())
        btns.add_widget(btn, stretch=0)
        btn = Widgets.Button("Help")
        btn.add_callback('activated', lambda w: self.help())
        btns.add_widget(btn, stretch=0)
        btns.add_widget(Widgets.Label(''), stretch=1)
        top.add_widget(btns, stretch=0)

        container.add_widget(top, stretch=1)