virt-manager/virtManager/manager.py

#
# Copyright (C) 2006-2008 Red Hat, Inc.
# Copyright (C) 2006 Daniel P. Berrange <berrange@redhat.com>
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
#

import logging
import re

# pylint: disable=E0611
from gi.repository import GObject
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import GdkPixbuf
# pylint: enable=E0611

from virtManager import packageutils
from virtManager import uihelpers
from virtManager.connection import vmmConnection
from virtManager.baseclass import vmmGObjectUI
from virtManager.delete import vmmDeleteDialog
from virtManager.graphwidgets import CellRendererSparkline
from virtManager import util as util


# Number of data points for performance graphs
GRAPH_LEN = 40

# fields in the tree model data set
ROW_HANDLE = 0
ROW_NAME = 1
ROW_MARKUP = 2
ROW_STATUS = 3
ROW_STATUS_ICON = 4
ROW_KEY = 5
ROW_HINT = 6
ROW_IS_CONN = 7
ROW_IS_CONN_CONNECTED = 8
ROW_IS_VM = 9
ROW_IS_VM_RUNNING = 10
ROW_COLOR = 11
ROW_INSPECTION_OS_ICON = 12

# Columns in the tree view
COL_NAME = 0
COL_GUEST_CPU = 1
COL_HOST_CPU = 2
COL_DISK = 3
COL_NETWORK = 4

def _style_get_prop(widget, propname):
    value = GObject.Value()
    value.init(GObject.TYPE_INT)
    widget.style_get_property(propname, value)
    return value.get_int()


try:
    import gi
    gi.check_version("3.7.4")
    can_set_row_none = True
except (ValueError, AttributeError):
    can_set_row_none = False


def _style_get_prop(widget, propname):
    value = GObject.Value()
    value.init(GObject.TYPE_INT)
    widget.style_get_property(propname, value)
    return value.get_int()


class vmmManager(vmmGObjectUI):
    __gsignals__ = {
        "action-show-connect": (GObject.SignalFlags.RUN_FIRST, None, []),
        "action-show-vm": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-show-about": (GObject.SignalFlags.RUN_FIRST, None, []),
        "action-show-host": (GObject.SignalFlags.RUN_FIRST, None, [str]),
        "action-show-preferences": (GObject.SignalFlags.RUN_FIRST, None, []),
        "action-show-create": (GObject.SignalFlags.RUN_FIRST, None, [str]),
        "action-suspend-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-resume-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-run-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-shutdown-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-reset-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-reboot-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-destroy-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-save-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-migrate-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-clone-domain": (GObject.SignalFlags.RUN_FIRST, None, [str, str]),
        "action-exit-app": (GObject.SignalFlags.RUN_FIRST, None, []),
        "manager-closed": (GObject.SignalFlags.RUN_FIRST, None, []),
        "manager-opened": (GObject.SignalFlags.RUN_FIRST, None, []),
        "remove-conn": (GObject.SignalFlags.RUN_FIRST, None, [str]),
        "add-default-conn": (GObject.SignalFlags.RUN_FIRST, None, []),
    }

    def __init__(self):
        vmmGObjectUI.__init__(self, "vmm-manager.ui", "vmm-manager")

        self.delete_dialog = None
        self.ignore_pause = False

        # Mapping of VM UUID -> tree model rows to
        # allow O(1) access instead of O(n)
        self.rows = {}

        w, h = self.config.get_manager_window_size()
        self.topwin.set_default_size(w or 550, h or 550)
        self.prev_position = None

        self.vmmenu = Gtk.Menu()
        self.vmmenushutdown = Gtk.Menu()
        self.vmmenu_items = {}
        self.vmmenushutdown_items = {}
        self.connmenu = Gtk.Menu()
        self.connmenu_items = {}

        # There seem to be ref counting issues with calling
        # list.get_column, so avoid it
        self.diskcol = None
        self.netcol = None
        self.guestcpucol = None
        self.hostcpucol = None

        self.builder.connect_signals({
            "on_menu_view_guest_cpu_usage_activate":
                    self.toggle_stats_visible_guest_cpu,
            "on_menu_view_host_cpu_usage_activate":
                    self.toggle_stats_visible_host_cpu,
            "on_menu_view_disk_io_activate" :
                    self.toggle_stats_visible_disk,
            "on_menu_view_network_traffic_activate":
                    self.toggle_stats_visible_network,

            "on_vm_manager_delete_event": self.close,
            "on_vmm_manager_configure_event": self.window_resized,
            "on_menu_file_add_connection_activate": self.new_conn,
            "on_menu_file_quit_activate": self.exit_app,
            "on_menu_file_close_activate": self.close,
            "on_vmm_close_clicked": self.close,
            "on_vm_open_clicked": self.show_vm,
            "on_vm_run_clicked": self.start_vm,
            "on_vm_new_clicked": self.new_vm,
            "on_vm_shutdown_clicked": self.poweroff_vm,
            "on_vm_pause_clicked": self.pause_vm_button,
            "on_menu_edit_details_activate": self.show_vm,
            "on_menu_edit_delete_activate": self.do_delete,
            "on_menu_host_details_activate": self.show_host,

            "on_vm_list_row_activated": self.show_vm,
            "on_vm_list_button_press_event": self.popup_vm_menu_button,
            "on_vm_list_key_press_event": self.popup_vm_menu_key,

            "on_menu_edit_preferences_activate": self.show_preferences,
            "on_menu_help_about_activate": self.show_about,
        })

        self.init_vmlist()
        self.init_stats()
        self.init_toolbar()
        self.init_context_menus()

        self.vm_selected()
        self.widget("vm-list").get_selection().connect("changed",
                                                       self.vm_selected)

        self.max_disk_rate = 10.0
        self.max_net_rate = 10.0

        # Initialize stat polling columns based on global polling
        # preferences (we want signal handlers for this)
        self.enable_polling(COL_DISK)
        self.enable_polling(COL_NETWORK)

        # Select first list entry
        vmlist = self.widget("vm-list")
        if len(vmlist.get_model()) != 0:
            vmlist.get_selection().select_iter(
                                        vmlist.get_model().get_iter_first())

        # Queue up the default connection detector
        self.idle_emit("add-default-conn")

    ##################
    # Common methods #
    ##################

    def show(self):
        logging.debug("Showing manager")
        vis = self.is_visible()
        self.topwin.present()
        if vis:
            return

        if self.prev_position:
            self.topwin.move(*self.prev_position)
            self.prev_position = None

        self.emit("manager-opened")

    def close(self, src_ignore=None, src2_ignore=None):
        logging.debug("Closing manager")
        if not self.is_visible():
            return

        self.prev_position = self.topwin.get_position()
        self.topwin.hide()
        self.emit("manager-closed")

        return 1


    def _cleanup(self):
        self.rows = None

        self.diskcol = None
        self.guestcpucol = None
        self.hostcpucol = None
        self.netcol = None

        if self.delete_dialog:
            self.delete_dialog.cleanup()
            self.delete_dialog = None

        self.vmmenu.destroy()
        self.vmmenu = None
        self.vmmenu_items = None
        self.vmmenushutdown.destroy()
        self.vmmenushutdown = None
        self.vmmenushutdown_items = None
        self.connmenu.destroy()
        self.connmenu = None
        self.connmenu_items = None

    def is_visible(self):
        return bool(self.topwin.get_visible())

    def set_startup_error(self, msg):
        self.widget("vm-notebook").set_current_page(1)
        self.widget("startup-error-label").set_text(msg)

    ################
    # Init methods #
    ################

    def init_stats(self):
        self.add_gconf_handle(
            self.config.on_vmlist_guest_cpu_usage_visible_changed(
                                self.toggle_guest_cpu_usage_visible_widget))
        self.add_gconf_handle(
            self.config.on_vmlist_host_cpu_usage_visible_changed(
                                self.toggle_host_cpu_usage_visible_widget))
        self.add_gconf_handle(
            self.config.on_vmlist_disk_io_visible_changed(
                                self.toggle_disk_io_visible_widget))
        self.add_gconf_handle(
            self.config.on_vmlist_network_traffic_visible_changed(
                                self.toggle_network_traffic_visible_widget))

        # Register callbacks with the global stats enable/disable values
        # that disable the associated vmlist widgets if reporting is disabled
        self.add_gconf_handle(
            self.config.on_stats_enable_disk_poll_changed(self.enable_polling,
                                                    COL_DISK))
        self.add_gconf_handle(
            self.config.on_stats_enable_net_poll_changed(self.enable_polling,
                                                    COL_NETWORK))


        self.widget("menu_view_stats_guest_cpu").set_active(
                            self.config.is_vmlist_guest_cpu_usage_visible())
        self.widget("menu_view_stats_host_cpu").set_active(
                            self.config.is_vmlist_host_cpu_usage_visible())
        self.widget("menu_view_stats_disk").set_active(
                            self.config.is_vmlist_disk_io_visible())
        self.widget("menu_view_stats_network").set_active(
                            self.config.is_vmlist_network_traffic_visible())

    def init_toolbar(self):
        self.widget("vm-new").set_icon_name("vm_new")
        self.widget("vm-open").set_icon_name("icon_console")
        uihelpers.build_shutdown_button_menu(self.widget("vm-shutdown"),
                                             self.poweroff_vm,
                                             self.reboot_vm,
                                             self.reset_vm,
                                             self.destroy_vm,
                                             self.save_vm)

        tool = self.widget("vm-toolbar")
        tool.set_property("icon-size", Gtk.IconSize.LARGE_TOOLBAR)
        for c in tool.get_children():
            c.set_homogeneous(False)

    def init_context_menus(self):
        def build_icon(name):
            return Gtk.Image.new_from_icon_name(name, Gtk.IconSize.MENU)

        def build_stock(name):
            return Gtk.Image.new_from_stock(name, Gtk.IconSize.MENU)

        shutdownmenu_icon   = build_icon("system-shutdown")
        reboot_icon         = build_icon("system-shutdown")
        shutdown_icon       = build_icon("system-shutdown")
        destroy_icon        = build_icon("system-shutdown")
        reset_icon          = build_icon("system-shutdown")
        run_icon            = build_stock(Gtk.STOCK_MEDIA_PLAY)
        pause_icon          = build_stock(Gtk.STOCK_MEDIA_PAUSE)
        save_icon           = build_stock(Gtk.STOCK_SAVE)
        resume_icon         = build_stock(Gtk.STOCK_MEDIA_PAUSE)
        delete_icon         = build_stock(Gtk.STOCK_DELETE)

        def add_to_menu(menu, items, idx, text, icon, cb):
            if text[0:3] == 'gtk':
                item = Gtk.ImageMenuItem.new_from_stock(text, None)
            else:
                item = Gtk.ImageMenuItem.new_with_mnemonic(text)
            if icon:
                item.set_image(icon)
            item.show()
            if cb:
                item.connect("activate", cb)
            menu.add(item)
            items[idx] = item

        def add_vm_menu(idx, text, icon, cb):
            add_to_menu(self.vmmenu, self.vmmenu_items, idx, text, icon, cb)
        def add_shutdown_menu(idx, text, icon, cb):
            add_to_menu(self.vmmenushutdown, self.vmmenushutdown_items,
                        idx, text, icon, cb)
        def add_conn_menu(idx, text, icon, cb):
            add_to_menu(self.connmenu, self.connmenu_items,
                        idx, text, icon, cb)
        def add_sep(menu, items, idx):
            sep = Gtk.SeparatorMenuItem()
            sep.show()
            menu.add(sep)
            items[idx] = sep

        # Build VM context menu
        add_vm_menu("run", _("_Run"), run_icon, self.start_vm)
        add_vm_menu("pause", _("_Pause"), pause_icon, self.pause_vm)
        add_vm_menu("resume", _("R_esume"), resume_icon, self.resume_vm)

        add_vm_menu("shutdown", _("_Shut Down"), shutdownmenu_icon, None)
        self.vmmenu_items["shutdown"].set_submenu(self.vmmenushutdown)
        add_shutdown_menu("reboot", _("_Reboot"), reboot_icon, self.reboot_vm)
        add_shutdown_menu("poweroff", _("_Shut Down"), shutdown_icon,
                          self.poweroff_vm)
        add_shutdown_menu("forcereset", _("_Force Reset"), reset_icon,
                          self.reset_vm)
        add_shutdown_menu("forcepoweroff", _("_Force Off"), destroy_icon,
                          self.destroy_vm)
        add_sep(self.vmmenushutdown, self.vmmenushutdown_items, "sep")
        add_shutdown_menu("save", _("Sa_ve"), save_icon, self.save_vm)

        add_sep(self.vmmenu, self.vmmenu_items, "hsep1")
        add_vm_menu("clone", _("_Clone..."), None, self.open_clone_window)
        add_vm_menu("migrate", _("_Migrate..."), None, self.migrate_vm)
        add_vm_menu("delete", _("_Delete"), delete_icon, self.do_delete)

        add_sep(self.vmmenu, self.vmmenu_items, "hsep2")
        add_vm_menu("open", Gtk.STOCK_OPEN, None, self.show_vm)
        self.vmmenu.show()

        # Build connection context menu
        add_conn_menu("create", Gtk.STOCK_NEW, None, self.new_vm)
        add_conn_menu("connect", Gtk.STOCK_CONNECT, None, self.open_conn)
        add_conn_menu("disconnect", Gtk.STOCK_DISCONNECT, None,
                      self.close_conn)
        add_sep(self.connmenu, self.connmenu_items, "hsep1")
        add_conn_menu("delete", Gtk.STOCK_DELETE, None, self.do_delete)
        add_sep(self.connmenu, self.connmenu_items, "hsep2")
        add_conn_menu("details", _("D_etails"), None, self.show_host)
        self.connmenu.show()

    def init_vmlist(self):
        vmlist = self.widget("vm-list")
        self.widget("vm-notebook").set_show_tabs(False)

        # Handle, name, markup, status, status icon name, key/uuid, hint,
        # is conn, is conn connected, is vm, is vm running, fg color,
        # inspection icon
        model = Gtk.TreeStore(object, str, str, str, str, str, str,
                              bool, bool, bool, bool, Gdk.Color,
                              GdkPixbuf.Pixbuf)
        vmlist.set_model(model)
        vmlist.set_tooltip_column(ROW_HINT)
        vmlist.set_headers_visible(True)
        vmlist.set_level_indentation(
                -(_style_get_prop(vmlist, "expander-size") + 3))

        nameCol = Gtk.TreeViewColumn(_("Name"))
        nameCol.set_expand(True)
        nameCol.set_spacing(6)

        statusCol = nameCol
        vmlist.append_column(nameCol)

        status_icon = Gtk.CellRendererPixbuf()
        status_icon.set_property("stock-size", Gtk.IconSize.DND)
        statusCol.pack_start(status_icon, False)
        statusCol.add_attribute(status_icon, 'icon-name', ROW_STATUS_ICON)
        statusCol.add_attribute(status_icon, 'visible', ROW_IS_VM)

        inspection_os_icon = Gtk.CellRendererPixbuf()
        statusCol.pack_start(inspection_os_icon, False)
        statusCol.add_attribute(inspection_os_icon, 'pixbuf',
                                ROW_INSPECTION_OS_ICON)
        statusCol.add_attribute(inspection_os_icon, 'visible', ROW_IS_VM)

        name_txt = Gtk.CellRendererText()
        nameCol.pack_start(name_txt, True)
        nameCol.add_attribute(name_txt, 'markup', ROW_MARKUP)
        nameCol.add_attribute(name_txt, 'foreground-gdk', ROW_COLOR)
        nameCol.set_sort_column_id(COL_NAME)

        def make_stats_column(title, datafunc, is_visible, colnum):
            col = Gtk.TreeViewColumn(title)
            col.set_min_width(140)
            txt = Gtk.CellRendererText()
            txt.set_property("ypad", 4)
            img = CellRendererSparkline()
            img.set_property("xpad", 6)
            img.set_property("ypad", 12)
            img.set_property("reversed", True)
            col.pack_start(img, True)
            col.pack_start(txt, True)
            col.add_attribute(img, 'visible', ROW_IS_VM)
            col.add_attribute(txt, 'visible', ROW_IS_CONN)
            col.set_cell_data_func(img, datafunc, None)
            col.set_visible(is_visible)
            col.set_sort_column_id(colnum)
            vmlist.append_column(col)
            return col

        self.guestcpucol = make_stats_column(_("CPU usage"),
                            self.guest_cpu_usage_img,
                            self.config.is_vmlist_guest_cpu_usage_visible(),
                            COL_GUEST_CPU)
        self.hostcpucol = make_stats_column(_("Host CPU usage"),
                            self.host_cpu_usage_img,
                            self.config.is_vmlist_host_cpu_usage_visible(),
                            COL_HOST_CPU)
        self.diskcol = make_stats_column(_("Disk I/O"),
                            self.disk_io_img,
                            self.config.is_vmlist_disk_io_visible(),
                            COL_DISK)
        self.netcol = make_stats_column(_("Network I/O"),
                            self.network_traffic_img,
                            self.config.is_vmlist_network_traffic_visible(),
                            COL_NETWORK)

        model.set_sort_func(COL_NAME, self.vmlist_name_sorter)
        model.set_sort_func(COL_GUEST_CPU, self.vmlist_guest_cpu_usage_sorter)
        model.set_sort_func(COL_HOST_CPU, self.vmlist_host_cpu_usage_sorter)
        model.set_sort_func(COL_DISK, self.vmlist_disk_io_sorter)
        model.set_sort_func(COL_NETWORK, self.vmlist_network_usage_sorter)
        model.set_sort_column_id(COL_NAME, Gtk.SortType.ASCENDING)

    ##################
    # Helper methods #
    ##################

    def current_row(self):
        vmlist = self.widget("vm-list")
        selection = vmlist.get_selection()
        active = selection.get_selected()

        treestore, treeiter = active
        if treeiter is not None:
            return treestore[treeiter]
        return None

    def current_vm(self):
        row = self.current_row()
        if not row or row[ROW_IS_CONN]:
            return None

        return row[ROW_HANDLE]

    def current_conn(self):
        row = self.current_row()
        if not row:
            return None

        handle = row[ROW_HANDLE]
        if row[ROW_IS_CONN]:
            return handle
        else:
            return handle.conn

    def current_vmuuid(self):
        vm = self.current_vm()
        if vm is None:
            return None
        return vm.get_uuid()

    def current_conn_uri(self, default_selection=False):
        vmlist = self.widget("vm-list")
        model = vmlist.get_model()

        conn = self.current_conn()
        if conn is None and default_selection:
            # Nothing selected, use first connection row
            for row in model:
                if row[ROW_IS_CONN]:
                    conn = row[ROW_HANDLE]
                    break

        if conn:
            return conn.get_uri()
        return None

    ####################
    # Action listeners #
    ####################

    def window_resized(self, ignore, event):
        # Sometimes dimensions change when window isn't visible
        if not self.is_visible():
            return

        self.config.set_manager_window_size(event.width, event.height)

    def exit_app(self, src_ignore=None, src2_ignore=None):
        self.emit("action-exit-app")

    def new_conn(self, src_ignore=None):
        self.emit("action-show-connect")

    def new_vm(self, src_ignore=None):
        self.emit("action-show-create", self.current_conn_uri())

    def show_about(self, src_ignore):
        self.emit("action-show-about")

    def show_preferences(self, src_ignore):
        self.emit("action-show-preferences")

    def show_host(self, src_ignore):
        uri = self.current_conn_uri(default_selection=True)
        self.emit("action-show-host", uri)

    def show_vm(self, ignore, ignore2=None, ignore3=None):
        conn = self.current_conn()
        vm = self.current_vm()
        if conn is None:
            return

        if vm:
            self.emit("action-show-vm", conn.get_uri(), vm.get_uuid())
        else:
            if not self.open_conn():
                self.emit("action-show-host", conn.get_uri())

    def open_clone_window(self, ignore1=None, ignore2=None, ignore3=None):
        if self.current_vmuuid():
            self.emit("action-clone-domain", self.current_conn_uri(),
                      self.current_vmuuid())

    def do_delete(self, ignore=None):
        conn = self.current_conn()
        vm = self.current_vm()
        if vm is None:
            self._do_delete_conn(conn)
        else:
            self._do_delete_vm(vm)

    def _do_delete_conn(self, conn):
        if conn is None:
            return

        result = self.err.yes_no(_("This will remove the connection:\n\n%s\n\n"
                                   "Are you sure?") % conn.get_uri())
        if not result:
            return

        self.emit("remove-conn", conn.get_uri())

    def _do_delete_vm(self, vm):
        if vm.is_active():
            return

        if not self.delete_dialog:
            self.delete_dialog = vmmDeleteDialog()
        self.delete_dialog.show(vm, self.topwin)

    def set_pause_state(self, state):
        src = self.widget("vm-pause")
        try:
            self.ignore_pause = True
            src.set_active(state)
        finally:
            self.ignore_pause = False

    def pause_vm_button(self, src):
        if self.ignore_pause:
            return

        do_pause = src.get_active()

        # Set button state back to original value: just let the status
        # update function fix things for us
        self.set_pause_state(not do_pause)

        if do_pause:
            self.pause_vm(None)
        else:
            self.resume_vm(None)

    def start_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-run-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def reboot_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-reboot-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def poweroff_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-shutdown-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def destroy_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-destroy-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def reset_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-reset-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def save_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-save-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def pause_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-suspend-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def resume_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-resume-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def migrate_vm(self, ignore):
        vm = self.current_vm()
        if vm is not None:
            self.emit("action-migrate-domain",
                      vm.conn.get_uri(), vm.get_uuid())

    def close_conn(self, ignore):
        conn = self.current_conn()
        if conn.get_state() != vmmConnection.STATE_DISCONNECTED:
            conn.close()

    def open_conn(self, ignore=None):
        conn = self.current_conn()
        if conn.get_state() == vmmConnection.STATE_DISCONNECTED:
            conn.open()
            return True

    def _connect_error(self, conn, errmsg, tb, warnconsole):
        errmsg = errmsg.strip(" \n")
        tb = tb.strip(" \n")
        hint = ""
        show_errmsg = True

        if conn.is_remote():
            logging.debug(conn.get_transport())
            if re.search(r"nc: .* -- 'U'", tb):
                hint += _("The remote host requires a version of netcat/nc\n"
                          "which supports the -U option.")
                show_errmsg = False
            elif (conn.get_transport()[0] == "ssh" and
                  re.search(r"ssh-askpass", tb)):

                if self.config.askpass_package:
                    ret = packageutils.check_packagekit(
                                            self.err,
                                            self.config.askpass_package,
                                            False)
                    if ret:
                        conn.open()
                        return

                hint += _("You need to install openssh-askpass or "
                          "similar\nto connect to this host.")
                show_errmsg = False
            else:
                hint += _("Verify that the 'libvirtd' daemon is running\n"
                          "on the remote host.")

        elif conn.is_xen():
            hint += _("Verify that:\n"
                      " - A Xen host kernel was booted\n"
                      " - The Xen service has been started")

        else:
            if warnconsole:
                hint += _("Could not detect a local session: if you are \n"
                          "running virt-manager over ssh -X or VNC, you \n"
                          "may not be able to connect to libvirt as a \n"
                          "regular user. Try running as root.")
                show_errmsg = False
            elif re.search(r"libvirt-sock", tb):
                hint += _("Verify that the 'libvirtd' daemon is running.")
                show_errmsg = False

        msg = _("Unable to connect to libvirt.")
        if show_errmsg:
            msg += "\n\n%s" % errmsg
        if hint:
            msg += "\n\n%s" % hint

        msg = msg.strip("\n")
        details = msg
        details += "\n\n"
        details += "Libvirt URI is: %s\n\n" % conn.get_uri()
        details += tb

        self.err.show_err(msg, details, title=_("Virtual Machine Manager Connection Failure"))


    ####################################
    # VM add/remove management methods #
    ####################################

    def vm_row_key(self, vm):
        return vm.get_uuid() + ":" + vm.conn.get_uri()

    def vm_added(self, conn, vmuuid):
        vm = conn.get_vm(vmuuid)
        vm.connect("status-changed", self.vm_status_changed)
        vm.connect("resources-sampled", self.vm_resources_sampled)
        vm.connect("config-changed", self.vm_resources_sampled, True)
        vm.connect("inspection-changed", self.vm_inspection_changed)

        vmlist = self.widget("vm-list")
        model = vmlist.get_model()

        self._append_vm(model, vm, conn)

    def vm_removed(self, conn, vmuuid):
        vmlist = self.widget("vm-list")
        model = vmlist.get_model()

        parent = self.rows[conn.get_uri()].iter
        for row in range(model.iter_n_children(parent)):
            vm = model.get_value(model.iter_nth_child(parent, row), ROW_HANDLE)
            if vm.get_uuid() == vmuuid:
                model.remove(model.iter_nth_child(parent, row))
                del self.rows[self.vm_row_key(vm)]
                break

    def _build_conn_hint(self, conn):
        hint = conn.get_uri()
        if conn.state == conn.STATE_DISCONNECTED:
            hint += " (%s)" % _("Double click to connect")
        return hint

    def _build_conn_markup(self, conn, row):
        name = util.xml_escape(row[ROW_NAME])
        text = name
        if conn.state == conn.STATE_DISCONNECTED:
            text += " - " + _("Not Connected")
        elif conn.state == conn.STATE_CONNECTING:
            text += " - " + _("Connecting...")

        markup = "<span size='smaller'>%s</span>" % text
        return markup

    def _build_conn_color(self, conn):
        color = Gdk.Color(0, 0, 0)
        if conn.state == conn.STATE_DISCONNECTED:
            # Color code #5b5b5b
            color = Gdk.Color(23296, 23296, 23296)
        return color

    def _build_vm_markup(self, row):
        domtext     = ("<span size='smaller' weight='bold'>%s</span>" %
                       util.xml_escape(row[ROW_NAME]))
        statetext   = "<span size='smaller'>%s</span>" % row[ROW_STATUS]
        return domtext + "\n" + statetext

    def _build_vm_row(self, vm):
        row = []

        row.insert(ROW_HANDLE, vm)
        row.insert(ROW_NAME, vm.get_name())
        row.insert(ROW_MARKUP, "")
        row.insert(ROW_STATUS, vm.run_status())
        row.insert(ROW_STATUS_ICON, vm.run_status_icon_name())
        row.insert(ROW_KEY, vm.get_uuid())
        row.insert(ROW_HINT, util.xml_escape(vm.get_description()))
        row.insert(ROW_IS_CONN, False)
        row.insert(ROW_IS_CONN_CONNECTED, True)
        row.insert(ROW_IS_VM, True)
        row.insert(ROW_IS_VM_RUNNING, vm.is_active())
        row.insert(ROW_COLOR, None)
        row.insert(ROW_INSPECTION_OS_ICON,
                   self.get_inspection_icon_pixbuf(vm, 16, 16))

        row[ROW_MARKUP] = self._build_vm_markup(row)

        return row

    def _append_vm(self, model, vm, conn):
        row_key = self.vm_row_key(vm)
        if row_key in self.rows:
            return

        row = self._build_vm_row(vm)
        parent = self.rows[conn.get_uri()].iter

        _iter = model.append(parent, row)
        path = model.get_path(_iter)
        self.rows[row_key] = model[path]

        # Expand a connection when adding a vm to it
        self.widget("vm-list").expand_row(model.get_path(parent), False)

    def _build_conn_row(self, conn):
        row = []
        row.insert(ROW_HANDLE, conn)
        row.insert(ROW_NAME, conn.get_pretty_desc_inactive(False))
        row.insert(ROW_MARKUP, self._build_conn_markup(conn, row))
        row.insert(ROW_STATUS, ("<span size='smaller'>%s</span>" %
                                conn.get_state_text()))
        row.insert(ROW_STATUS_ICON, None)
        row.insert(ROW_KEY, conn.get_uri())
        row.insert(ROW_HINT, self._build_conn_hint(conn))
        row.insert(ROW_IS_CONN, True)
        row.insert(ROW_IS_CONN_CONNECTED,
                   conn.state != conn.STATE_DISCONNECTED)
        row.insert(ROW_IS_VM, False)
        row.insert(ROW_IS_VM_RUNNING, False)
        row.insert(ROW_COLOR, self._build_conn_color(conn))
        row.insert(ROW_INSPECTION_OS_ICON, None)

        return row

    def _append_conn(self, model, conn):
        row = self._build_conn_row(conn)

        _iter = model.append(None, row)
        path = model.get_path(_iter)
        self.rows[conn.get_uri()] = model[path]
        return _iter

    def add_conn(self, engine_ignore, conn):
        # Make sure error page isn't showing
        self.widget("vm-notebook").set_current_page(0)

        if conn.get_uri() in self.rows:
            return

        conn.connect("vm-added", self.vm_added)
        conn.connect("vm-removed", self.vm_removed)
        conn.connect("resources-sampled", self.conn_resources_sampled)
        conn.connect("state-changed", self.conn_state_changed)
        conn.connect("connect-error", self._connect_error)

        # add the connection to the treeModel
        vmlist = self.widget("vm-list")
        row = self._append_conn(vmlist.get_model(), conn)
        vmlist.get_selection().select_iter(row)

        # Try to make sure that 2 row descriptions don't collide
        connrows = []
        descs = []
        for row in self.rows.values():
            if row[ROW_IS_CONN]:
                connrows.append(row)
        for row in connrows:
            descs.append(row[ROW_NAME])

        for row in connrows:
            conn = row[ROW_HANDLE]
            name = row[ROW_NAME]
            if descs.count(name) <= 1:
                continue

            newname = conn.get_pretty_desc_inactive(False, True)
            self.conn_resources_sampled(conn, newname)

    def remove_conn(self, engine_ignore, uri):
        model = self.widget("vm-list").get_model()
        parent = self.rows[uri].iter

        if parent is None:
            return

        child = model.iter_children(parent)
        while child is not None:
            del self.rows[self.vm_row_key(model.get_value(child, ROW_HANDLE))]
            model.remove(child)
            child = model.iter_children(parent)
        model.remove(parent)

        del self.rows[uri]


    #############################
    # State/UI updating methods #
    #############################

    def vm_status_changed(self, vm, oldstatus, newstatus):
        ignore = newstatus
        ignore = oldstatus
        parent = self.rows[vm.conn.get_uri()].iter
        vmlist = self.widget("vm-list")
        model = vmlist.get_model()

        missing = True
        for row in range(model.iter_n_children(parent)):
            _iter = model.iter_nth_child(parent, row)
            if model.get_value(_iter, ROW_KEY) == vm.get_uuid():
                missing = False
                break

        if missing:
            self._append_vm(model, vm, vm.conn)

        # Update run/shutdown/pause button states
        self.vm_selected()
        self.vm_resources_sampled(vm)

    def vm_resources_sampled(self, vm, config_changed=False):
        vmlist = self.widget("vm-list")
        model = vmlist.get_model()

        if self.vm_row_key(vm) not in self.rows:
            return

        row = self.rows[self.vm_row_key(vm)]
        row[ROW_NAME] = vm.get_name()
        row[ROW_STATUS] = vm.run_status()
        row[ROW_STATUS_ICON] = vm.run_status_icon_name()
        row[ROW_IS_VM_RUNNING] = vm.is_active()
        row[ROW_MARKUP] = self._build_vm_markup(row)

        if config_changed:
            desc = vm.get_description()
            if not can_set_row_none:
                desc = desc or ""
            row[ROW_HINT] = util.xml_escape(desc)

        model.row_changed(row.path, row.iter)

    def vm_inspection_changed(self, vm):
        vmlist = self.widget("vm-list")
        model = vmlist.get_model()

        if self.vm_row_key(vm) not in self.rows:
            return

        row = self.rows[self.vm_row_key(vm)]
        row[ROW_INSPECTION_OS_ICON] = \
            self.get_inspection_icon_pixbuf(vm, 16, 16)
        model.row_changed(row.path, row.iter)

    def get_inspection_icon_pixbuf(self, vm, w, h):
        # libguestfs gives us the PNG data as a string.
        png_data = vm.inspection.icon
        if png_data is None:
            return None
        try:
            pb = GdkPixbuf.PixbufLoader(image_type="png")
            pb.set_size(w, h)
            pb.write(png_data)
            pb.close()
            return pb.get_pixbuf()
        except:
            return None

    def conn_state_changed(self, conn):
        self.conn_resources_sampled(conn)
        self.vm_selected()

    def conn_resources_sampled(self, conn, newname=None):
        vmlist = self.widget("vm-list")
        model = vmlist.get_model()
        row = self.rows[conn.get_uri()]

        if newname:
            row[ROW_NAME] = newname
        row[ROW_MARKUP] = self._build_conn_markup(conn, row)
        row[ROW_STATUS] = ("<span size='smaller'>%s</span>" %
                           conn.get_state_text())
        row[ROW_IS_CONN_CONNECTED] = conn.state != conn.STATE_DISCONNECTED
        row[ROW_COLOR] = self._build_conn_color(conn)
        row[ROW_HINT] = self._build_conn_hint(conn)

        if conn.get_state() in [vmmConnection.STATE_DISCONNECTED,
                                vmmConnection.STATE_CONNECTING]:
            # Connection went inactive, delete any VM child nodes
            parent = self.rows[conn.get_uri()].iter
            if parent is not None:
                child = model.iter_children(parent)
                while child is not None:
                    del self.rows[self.vm_row_key(model.get_value(child,
                                                                  ROW_HANDLE))]
                    model.remove(child)
                    child = model.iter_children(parent)

        self.max_disk_rate = max(self.max_disk_rate, conn.disk_io_max_rate())
        self.max_net_rate = max(self.max_net_rate,
                                conn.network_traffic_max_rate())

        model.row_changed(row.path, row.iter)

    def change_run_text(self, can_restore):
        if can_restore:
            text = _("_Restore")
        else:
            text = _("_Run")
        strip_text = text.replace("_", "")

        self.vmmenu_items["run"].get_child().set_label(text)
        self.widget("vm-run").set_label(strip_text)

    def vm_selected(self, ignore=None):
        conn = self.current_conn()
        vm = self.current_vm()

        show_open = bool(vm)
        show_details = bool(vm)
        host_details = bool(len(self.rows))

        delete = bool((vm and vm.is_runable()) or
                      (not vm and conn))
        show_run = bool(vm and vm.is_runable())
        is_paused = bool(vm and vm.is_paused())
        if is_paused:
            show_pause = bool(vm and vm.is_unpauseable())
        else:
            show_pause = bool(vm and vm.is_pauseable())
        show_shutdown = bool(vm and vm.is_stoppable())

        if vm and vm.managedsave_supported:
            self.change_run_text(vm.hasSavedImage())

        self.widget("vm-open").set_sensitive(show_open)
        self.widget("vm-run").set_sensitive(show_run)
        self.widget("vm-shutdown").set_sensitive(show_shutdown)
        self.set_pause_state(is_paused)
        self.widget("vm-pause").set_sensitive(show_pause)

        self.widget("menu_edit_details").set_sensitive(show_details)
        self.widget("menu_host_details").set_sensitive(host_details)
        self.widget("menu_edit_delete").set_sensitive(delete)

    def popup_vm_menu_key(self, widget_ignore, event):
        if Gdk.keyval_name(event.keyval) != "Menu":
            return False

        vmlist = self.widget("vm-list")
        treeselection = vmlist.get_selection()
        model, _iter = treeselection.get_selected()
        self.popup_vm_menu(model, _iter, event)
        return True

    def popup_vm_menu_button(self, widget, event):
        if event.button != 3:
            return False

        tup = widget.get_path_at_pos(int(event.x), int(event.y))
        if tup is None:
            return False
        path = tup[0]
        model = widget.get_model()
        _iter = model.get_iter(path)

        self.popup_vm_menu(model, _iter, event)
        return False

    def popup_vm_menu(self, model, _iter, event):
        if model.iter_parent(_iter) is not None:
            # Popup the vm menu
            vm = model.get_value(_iter, ROW_HANDLE)

            destroy = vm.is_destroyable()
            run     = vm.is_runable()
            stop    = vm.is_stoppable()
            paused  = vm.is_paused()
            ro      = vm.is_read_only()

            self.vmmenu_items["run"].set_sensitive(run)
            self.vmmenu_items["shutdown"].set_sensitive(stop)
            self.vmmenu_items["pause"].set_property("visible", not paused)
            self.vmmenu_items["pause"].set_sensitive(stop)
            self.vmmenu_items["resume"].set_property("visible", paused)
            self.vmmenu_items["resume"].set_sensitive(paused)
            self.vmmenu_items["migrate"].set_sensitive(stop)
            self.vmmenu_items["clone"].set_sensitive(not ro)
            self.vmmenu_items["delete"].set_sensitive(run)

            self.vmmenushutdown_items["poweroff"].set_sensitive(stop)
            self.vmmenushutdown_items["reboot"].set_sensitive(stop)
            self.vmmenushutdown_items["forcepoweroff"].set_sensitive(destroy)
            self.vmmenushutdown_items["save"].set_sensitive(destroy)
            self.vmmenu.popup(None, None, None, None, 0, event.time)
        else:
            # Pop up connection menu
            conn = model.get_value(_iter, ROW_HANDLE)
            disconn = (conn.get_state() == vmmConnection.STATE_DISCONNECTED)
            conning = (conn.get_state() == vmmConnection.STATE_CONNECTING)

            self.connmenu_items["create"].set_sensitive(not disconn)
            self.connmenu_items["disconnect"].set_sensitive(not (disconn or
                                                                 conning))
            self.connmenu_items["connect"].set_sensitive(disconn)
            self.connmenu_items["delete"].set_sensitive(disconn)

            self.connmenu.popup(None, None, None, None, 0, event.time)


    #################
    # Stats methods #
    #################

    def vmlist_name_sorter(self, model, iter1, iter2, ignore):
        return cmp(model.get_value(iter1, ROW_NAME),
                   model.get_value(iter2, ROW_NAME))

    def vmlist_guest_cpu_usage_sorter(self, model, iter1, iter2, ignore):
        obj1 = model.get_value(iter1, ROW_HANDLE)
        obj2 = model.get_value(iter2, ROW_HANDLE)

        return cmp(obj1.guest_cpu_time_percentage(),
                   obj2.guest_cpu_time_percentage())

    def vmlist_host_cpu_usage_sorter(self, model, iter1, iter2, ignore):
        obj1 = model.get_value(iter1, ROW_HANDLE)
        obj2 = model.get_value(iter2, ROW_HANDLE)

        return cmp(obj1.host_cpu_time_percentage(),
                   obj2.host_cpu_time_percentage())

    def vmlist_disk_io_sorter(self, model, iter1, iter2, ignore):
        obj1 = model.get_value(iter1, ROW_HANDLE)
        obj2 = model.get_value(iter2, ROW_HANDLE)

        return cmp(obj1.disk_io_rate(), obj2.disk_io_rate())

    def vmlist_network_usage_sorter(self, model, iter1, iter2, ignore):
        obj1 = model.get_value(iter1, ROW_HANDLE)
        obj2 = model.get_value(iter2, ROW_HANDLE)

        return cmp(obj1.network_traffic_rate(), obj2.network_traffic_rate())

    def enable_polling(self, column):
        if column == COL_DISK:
            widgn = "menu_view_stats_disk"
            do_enable = self.config.get_stats_enable_disk_poll()
        elif column == COL_NETWORK:
            widgn = "menu_view_stats_network"
            do_enable = self.config.get_stats_enable_net_poll()
        widget = self.widget(widgn)

        tool_text = ""

        if do_enable:
            widget.set_sensitive(True)
        else:
            if widget.get_active():
                widget.set_active(False)
            widget.set_sensitive(False)
            tool_text = _("Disabled in preferences dialog.")

        widget.set_tooltip_text(tool_text)

        disabled_text = _(" (disabled)")
        current_text = widget.get_label().strip(disabled_text)
        if tool_text:
            current_text = current_text + disabled_text
        widget.set_label(current_text)

    def toggle_network_traffic_visible_widget(self):
        val = self.config.is_vmlist_network_traffic_visible()
        self.netcol.set_visible(val)
        self.widget("menu_view_stats_network").set_active(val)

    def toggle_disk_io_visible_widget(self):
        val = self.config.is_vmlist_disk_io_visible()
        self.diskcol.set_visible(val)
        self.widget("menu_view_stats_disk").set_active(val)

    def toggle_guest_cpu_usage_visible_widget(self):
        val = self.config.is_vmlist_guest_cpu_usage_visible()
        self.guestcpucol.set_visible(val)
        self.widget("menu_view_stats_guest_cpu").set_active(val)

    def toggle_host_cpu_usage_visible_widget(self):
        val = self.config.is_vmlist_host_cpu_usage_visible()
        self.hostcpucol.set_visible(val)
        self.widget("menu_view_stats_host_cpu").set_active(val)

    def toggle_stats_visible(self, src, stats_id):
        visible = src.get_active()
        set_stats = {
            COL_GUEST_CPU: self.config.set_vmlist_guest_cpu_usage_visible,
            COL_HOST_CPU: self.config.set_vmlist_host_cpu_usage_visible,
            COL_DISK: self.config.set_vmlist_disk_io_visible,
            COL_NETWORK: self.config.set_vmlist_network_traffic_visible,
        }
        set_stats[stats_id](visible)

    def toggle_stats_visible_guest_cpu(self, src):
        self.toggle_stats_visible(src, COL_GUEST_CPU)
    def toggle_stats_visible_host_cpu(self, src):
        self.toggle_stats_visible(src, COL_HOST_CPU)
    def toggle_stats_visible_disk(self, src):
        self.toggle_stats_visible(src, COL_DISK)
    def toggle_stats_visible_network(self, src):
        self.toggle_stats_visible(src, COL_NETWORK)

    def guest_cpu_usage_img(self, column_ignore, cell, model, _iter, data):
        obj = model.get_value(_iter, ROW_HANDLE)
        if obj is None or not hasattr(obj, "conn"):
            return

        data = obj.guest_cpu_time_vector_limit(GRAPH_LEN)
        cell.set_property('data_array', data)

    def host_cpu_usage_img(self, column_ignore, cell, model, _iter, data):
        obj = model.get_value(_iter, ROW_HANDLE)
        if obj is None or not hasattr(obj, "conn"):
            return

        data = obj.host_cpu_time_vector_limit(GRAPH_LEN)
        cell.set_property('data_array', data)

    def disk_io_img(self, column_ignore, cell, model, _iter, data):
        obj = model.get_value(_iter, ROW_HANDLE)
        if obj is None or not hasattr(obj, "conn"):
            return

        data = obj.disk_io_vector_limit(GRAPH_LEN, self.max_disk_rate)
        cell.set_property('data_array', data)

    def network_traffic_img(self, column_ignore, cell, model, _iter, data):
        obj = model.get_value(_iter, ROW_HANDLE)
        if obj is None or not hasattr(obj, "conn"):
            return

        data = obj.network_traffic_vector_limit(GRAPH_LEN, self.max_net_rate)
        cell.set_property('data_array', data)