python-lunch 0.4.0-1 / usr / share / pyshared / lunch / gui.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Lunch
# Copyright (C) 2009 Société des arts technologiques (SAT)
# http://www.sat.qc.ca
# All rights reserved.
#
# This file 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.
#
# Lunch 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 Lunch.  If not, see <http://www.gnu.org/licenses/>.
"""
Main GUI of the Lunch Master 
"""
if __name__ == "__main__":
    from twisted.internet import gtk2reactor
    gtk2reactor.install() # has to be done before importing reactor
from twisted.internet import reactor
from twisted.internet import defer
from twisted.internet import utils
from twisted.python import procutils

import gtk
import pango
import sys
import os
import textwrap
import webbrowser
from lunch import __version__
from lunch import dialogs
from lunch.states import *
from lunch import logger

#TODO: i18nize
def _(value):
    return value

log = logger.start(name="lunch-gui")

__license__ = _("""Lunch
Copyright (C) 2009 Society for Arts and Technology (SAT)
http://www.sat.qc.ca
All rights reserved.

This file 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.

Lunch 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 Lunch.  If not, see <http://www.gnu.org/licenses/>.""")

PADDING_IN_TEXTVIEW = 22 # number of spaces before text contents in the textview
ICON_FILE = "/usr/share/pixmaps/lunch.png"

def run_once(executable, *args):
    """
    Runs a command, without looking at its output or return value.
    Returns a Deferred or None.
    """
    def _cb(result):
        #print(result)
        pass
    try:
        executable = procutils.which(executable)[0]
    except IndexError:
        log.error("Could not find executable %s" % (executable))
        return None
    else:
        log.info("$ %s %s" % (executable, " ".join(list(args))))
        d = utils.getProcessValue(executable, args, os.environ, '.', reactor)
        d.addCallback(_cb)
        return d

def open_path(path):
    """
    Opens a directory or file using gnome-open.
    Returns a Deferred or None.
    """
    return run_once("gnome-open", path)

def tail_child_log(command):
    """
    Opens a terminal window with the tail of the log file for the child 
    process of a command. Uses SSH if needed.
    @param command: L{lunch.commands.Command}
    """
    #TODO: really need to make a valid path in add_command and keep it.
    child_log_path = os.path.join(command.child_log_dir, "child-%s.log" % (command.identifier))
    xterm_title = 'tail -F %s' % (command.identifier)
    cmd = []
    cmd.extend(["xterm", "-title", '%s' % (xterm_title), "-e"])
    if command.host is not None: # using SSH
        cmd.extend(["ssh"])
        if command.user is not None:
            cmd.extend(["-l", command.user])
        cmd.extend([command.host])
        xterm_title += " on " + command.host
    cmd.extend(["tail", "-F", child_log_path])
    log.info("$ %s" % (" ".join(cmd)))
    run_once(*cmd)

def tail_master_log(master):
    log_path = master.log_file
    if log_path is None:
        log.warning("No master log file to tail -F") # TODO: error dialog.
    else:
        cmd = []
        xterm_title = "tail -F Lunch Master Log File"
        cmd.extend(["xterm", "-title", '%s' % (xterm_title), "-e"])
        cmd.extend(["tail", "-F", log_path])
        log.info("$ %s" % (" ".join(cmd)))
        run_once(*cmd)

def man_lunch():
    cmd = []
    xterm_title = "man lunch"
    cmd.extend(["xterm", "-title", '%s' % (xterm_title), "-e"])
    cmd.extend(["man", "lunch"])
    log.info("$ %s" % (" ".join(cmd)))
    run_once(*cmd)
    
def _format_command_line(text):
    """
    Formats the text of a command in order to display it in a gtk.TextView
    """
    global PADDING_IN_TEXTVIEW
    padding = PADDING_IN_TEXTVIEW + 2
    width = 70
    lines = textwrap.wrap(text, width)
    for i in range(len(lines)):
        if i == 0:
            lines[i] = "$ " + lines[i]
        else:
            lines[i] = "%s%s" % (" " * padding, lines[i]) # padding some spaces before the subsequent lines
    # log.debug("_format_command_line %s" % (lines))
    return "\n".join(lines)

class About(object):
    """
    About dialog
    """
    def __init__(self):
        self.about_dialog = gtk.AboutDialog()

    def show_about_dialog(self):
        global ICON_FILE
        self.about_dialog.set_name('Lunch')
        self.about_dialog.set_role('about')
        self.about_dialog.set_version(__version__)
        commentlabel = _('Simple Process Launcher for Complex Launching Setup.')
        self.about_dialog.set_comments(commentlabel)
        self.about_dialog.set_copyright(_("Copyright 2009-2010 Society for Arts and Technology"))
        self.about_dialog.set_license(__license__)
        self.about_dialog.set_authors([
            'Alexandre Quessy <alexandre@quessy.net>'
            ])
        self.about_dialog.set_documenters([
            'Simon Piette <simonp@sat.qc.ca>'
            ])
        self.about_dialog.set_artists(['Rocket000'])
        gtk.about_dialog_set_url_hook(self.show_website)
        self.about_dialog.set_website("http://svn.sat.qc.ca/trac/lunch")
        
        if not os.path.exists(ICON_FILE):
            log.warning("Could not find icon file %s." % (ICON_FILE))
        else:
            large_icon = gtk.gdk.pixbuf_new_from_file(ICON_FILE)
            self.about_dialog.set_logo(large_icon)
        
        # Connect to callbacks
        self.about_dialog.connect('response', self.destroy_about)
        self.about_dialog.connect('delete_event', self.destroy_about)
        self.about_dialog.connect("delete-event", self.destroy_about)
        self.about_dialog.show_all()
     
    def show_website(self, widget, data):
        webbrowser.open(data)

    def destroy_about(self, *args):
        self.about_dialog.destroy()

class LunchApp(object):
    """
    Simple GTK2 GUI for Lunch Master.
    
    Defines the main window
    """
    IDENTIFIER_COLUMN = 0 # the row in the treeview that contains the command identifier.

    def __init__(self, lunch_master=None):
        global ICON_FILE
        self.master = lunch_master
        self.confirm_close = True # should we ask if the user is sure to close the app?
        _commands = self.master.get_all_commands()

        # ------------------------------------------------------
        # Window and its icon
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.window.set_title("Lunch")
        self.window.connect("delete-event", self.destroy_app)
        #self.window.connect("destroy", self.destroy_app)
        WIDTH = 640
        HEIGHT = 480
        self.window.set_default_size(WIDTH, HEIGHT)

        if not os.path.exists(ICON_FILE):
            log.warning("Could not find icon file %s." % (ICON_FILE))
            basename = os.path.basename(ICON_FILE)
            directory = os.path.dirname(__file__)
            parent_dir = "/".join(directory.split("/")[0:-1])
            ICON_FILE = os.path.join(parent_dir, basename)
            log.warning("Using icon file %s" % (ICON_FILE))
        if os.path.exists(ICON_FILE):
            icon = gtk.gdk.pixbuf_new_from_file(ICON_FILE)
            self.window.set_icon_list(icon)
        else:
            log.warning("Could not find icon file %s." % (ICON_FILE))
            log.warning("Warning: Could not find icon file %s." % (ICON_FILE))
        
        # Vertical Box
        vbox = gtk.VBox(homogeneous=False)
        self.window.add(vbox)
        
        # ------------------------------------------------------
        # Menu bar
        self.ui_manager = None
        self.menubar = self._create_main_menu(self.window)
        vbox.pack_start(self.menubar, expand=False, fill=False)
        self.menubar.show()

        vpaned = gtk.VPaned()
        vbox.pack_start(vpaned, expand=True, fill=True)

        # ------------------------------------------------------
        # Scrollable with a TreeView
        scroller = gtk.ScrolledWindow()
        scroller.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
        scroller.set_shadow_type(gtk.SHADOW_IN)
        scroller.set_size_request(-1, 250)
        frame1 = gtk.Frame(label=_("Processes"))
        frame1.set_shadow_type(gtk.SHADOW_ETCHED_IN)
        frame1.add(scroller)
        vpaned.add1(frame1)
        # The ListStore contains the data.
        list_store = gtk.ListStore(str, str, str, int, str)
        # The TreeModelSort sorts the data
        self.model_sort = gtk.TreeModelSort(list_store)
        # The TreeView displays the sorted data in the GUI.
        self.tree_view_widget = gtk.TreeView(self.model_sort)
        self._setup_treeview()
        # self.tree_view_widget.set_property("has-tooltip", True)
        self.tree_view_widget.get_selection().connect("changed", self.on_selected_command_changed)
        #self.tree_view_widget.connect("query-tooltip", self.on_treeview_tooltip_queried)
        scroller.add(self.tree_view_widget)
        for command in _commands:
            self._add_command_in_tree(command)

        self.master.command_added_signal.connect(self.on_command_added)
        self.master.command_removed_signal.connect(self.on_command_removed)
        
        # ------------------------------------------------------
        # TextView for the details
        scroller2 = gtk.ScrolledWindow()
        scroller2.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
        scroller2.set_shadow_type(gtk.SHADOW_ETCHED_IN)
        scroller2.set_size_request(-1, 50)
        viewport = gtk.Viewport()
        frame2 = gtk.Frame(label=_("Details"))
        frame2.set_shadow_type(gtk.SHADOW_ETCHED_IN)
        frame2.add(scroller2)
        vpaned.add(frame2)
        #vbox.pack_start(scroller2, expand=False, fill=True)
        self.textview_widget = gtk.TextView()
        self._set_textview_appearance()
        scroller2.add(viewport)
        viewport.add(self.textview_widget)

        # ------------------------------------------------------
        # Box with buttons.
        hbox = gtk.HBox(homogeneous=True)
        vbox.pack_start(hbox, expand=False, fill=False)
        
        self.openlog_button_widget = gtk.Button(_("Open child process log file"))
        self.openlog_button_widget.connect("clicked", self.on_openlog_clicked)
        hbox.pack_start(self.openlog_button_widget)
        
        self.stop_command_button_widget = gtk.Button(_("Stop child process"))
        self.stop_command_button_widget.connect("clicked", self.on_stop_command_clicked)
        hbox.pack_start(self.stop_command_button_widget)

        self.start_command_button_widget = gtk.Button(_("Start child process"))
        self.start_command_button_widget.connect("clicked", self.on_start_command_clicked)
        hbox.pack_start(self.start_command_button_widget)
        
        self.window.show_all()
    
    def _set_textview_appearance(self):
        self.textview_widget.set_editable(False)
        textview_buffer = self.textview_widget.get_buffer()
        textview_buffer.create_tag("font", family="Monospace", scale=pango.SCALE_SMALL)

    def set_textview_text(self, text):
        textview_buffer = self.textview_widget.get_buffer()
        textview_buffer.delete(*textview_buffer.get_bounds())
        textview_buffer.insert_with_tags_by_name(textview_buffer.get_start_iter(), text, "font")
        #textview_buffer.set_text(text)

    def _update_text_in_textview(self):

        command = self._get_currently_selected_command(False)
        if command is None:
            txt = _("Select a command to view information about it.")
        else:
            txt = ""
            keyval = [
                (_("identifier"), command.identifier),
                (_("command"), _format_command_line(command.command)),
                (_("child_pid"), command.child_pid),
                (_("depends"), command.depends),
                (_("enabled"), command.enabled),
                (_("user"), command.user),
                (_("host"), command.host),
                (_("env"), command.env),
                #(_("log_dir"), command.log_dir),
                (_("respawn"), command.respawn),
                (_("sleep_after"), command.sleep_after),
                (_("delay_before_kill"), command.delay_before_kill),
                (_("verbose"), command.verbose),
                (_("how_many_times_tried"), command.how_many_times_tried),
                (_("_has_shown_ssh_error"), command._has_shown_ssh_error),
                (_("gave_up"), command.gave_up),
                ]
            for key, val in keyval:
                _format = "%" + ("%ds" % PADDING_IN_TEXTVIEW) + ": %s\n"
                txt += _format % (key, val)
        self.set_textview_text(txt)

    def _update_text_in_textview_if_command_is_selected(self, command):
        if command == self._get_currently_selected_command(False):
            self._update_text_in_textview()

    #def on_treeview_tooltip_queried(self, *args):
    #    log.debug("on_treeview_tooltip_queried %s" % (str(args)))

    def on_command_added(self, command):
        log.debug("on_command_added")
        self._add_command_in_tree(command)
        self._update_text_in_textview()
        
    def on_command_removed(self, command):
        log.debug("on_command_removed")
        self._remove_command_from_tree(command)
        self._update_text_in_textview()

    def on_selected_command_changed(self, *args):
        log.debug("on_selected_command_changed")
        self._update_buttons_according_to_selected_contact()
        self._update_text_in_textview()
    
    def _update_buttons_according_to_selected_contact(self):
        command = self._get_currently_selected_command(False)
        if command is None:
            #TODO enable/disable buttons
            self.stop_command_button_widget.set_sensitive(False)
            self.start_command_button_widget.set_sensitive(False)
            self.openlog_button_widget.set_sensitive(False)
        else:
            # log.debug("command: %s" % (command.identifier))
            if command.get_state_info() in [STATE_STARTING, STATE_RUNNING, STATE_STOPPING]:
                self.stop_command_button_widget.set_sensitive(True)
                self.start_command_button_widget.set_sensitive(False)
                self.openlog_button_widget.set_sensitive(True)
            elif command.get_state_info() in [STATE_STOPPED, STATE_NOSLAVE, INFO_DONE, INFO_FAILED, INFO_TODO, INFO_GAVEUP]:
                self.stop_command_button_widget.set_sensitive(False)
                self.start_command_button_widget.set_sensitive(True)
                self.openlog_button_widget.set_sensitive(True)

    def _setup_treeview(self):
        """
        Needs attributes;
         * self.tree_view_widget
         * self.model_sort
        """
        # Set initial sorting column and order.
        sorting_column_number = 0
        self.model_sort.set_sort_column_id(sorting_column_number, gtk.SORT_ASCENDING)

        NUM_COLUMNS = 5
        columns = [None] * NUM_COLUMNS
        # Set column title
        columns[0] = gtk.TreeViewColumn(_("Identifier"))
        columns[1] = gtk.TreeViewColumn(_("Command"))
        columns[2] = gtk.TreeViewColumn(_("Host"))
        columns[3] = gtk.TreeViewColumn(_("Executions")) # How many times
        columns[4] = gtk.TreeViewColumn(_("State")) # str
        
        # Set default properties for each column
        cells = [None] * NUM_COLUMNS
        for i in range(NUM_COLUMNS):
            self.tree_view_widget.append_column(columns[i])
            columns[i].set_expand(True)
            columns[i].set_max_width(400)
            columns[i].set_resizable(True)
            columns[i].set_sort_column_id(i)

            cells[i] = gtk.CellRendererText()
            cells[i].set_property("width-chars", 20) 
            columns[i].pack_start(cells[i], False) #True)
            columns[i].set_attributes(cells[i], text=i)
        # Set some custom properties
        cells[0].set_property("width-chars", 14) # Identifier
        cells[1].set_property("width-chars", 20) # Command
        cells[2].set_property("width-chars", 12) # Host
        cells[3].set_property("width-chars", 8) # Executions
        cells[4].set_property("width-chars", 8) # State

    def _get_iter_for_command_row(self, looking_for):
        """
        @param looking_for: identifier to look for
        @return: tree path - or None
        @rtype: gti.Iter
        """
        list_store = self.model_sort.get_model()
        row_number = 0
        found_it = False
        for row in iter(list_store):
            identifier = row[self.IDENTIFIER_COLUMN]
            if identifier == looking_for:
                found_it = True
                break
            row_number += 1
        if found_it:
            return list_store.get_iter(row_number)
        else:
            return None

    def _add_command_in_tree(self, command):
        """
        adds a row with the data of the command.
        """
        # TODO: update it every time it changes. (the PID, etc)
        list_store = self.model_sort.get_model()
        list_store.append(self._format_command(command))
        
        #self._set_tooltip_for_command(command)
        
        #self.commands[command.identifier] = command
        #print("Connecting state changed signal to GUI.")
        command.child_state_changed_signal.connect(self.on_command_status_changed)
        command.child_pid_changed_signal.connect(self.on_command_child_pid_changed)
        command.ssh_error_signal.connect(self.on_ssh_error)
        command.command_not_found_signal.connect(self.on_command_not_found)

#    # FIXME: did not get this to work yet
#    def _set_tooltip_for_command(self, command):
#        # trying to add a tooltip
#        tree_iter = self._get_iter_for_command_row(command.identifier)
#        tooltip = gtk.Tooltip()
#        txt = _("<b>Command</b>: %(command)s\n") % {"command": command.command}
#        tooltip.set_markup(txt)
#        log.debug("getting tree iter %s for command %s" % (tree_iter, command.identifier))
#        tree_path = self.model_sort.get_model().get_path(tree_iter)  # path in the list_store
#        log.debug("Adding tooltip %s in tree: %s" % (txt, tree_path))
#        # (GtkTreeView *tree_view, GtkTooltip *tooltip, GtkTreePath *path);
#        self.tree_view_widget.set_tooltip_row(tooltip, tree_path)

    def _remove_command_from_tree(self, command):
        """
        When a command is removed, removes it from the tree view.
        """
        list_store = self.model_sort.get_model()
        looking_for = command.identifier
        #list_store.append(self._format_command(command))
        row_number = 0
        for row in iter(list_store):
            identifier = row[self.IDENTIFIER_COLUMN]
            if identifier == looking_for:
                # Delete it!
                break
            row_number += 1
        
        log.debug("Removing a row from the list store.")
        list_store.remove(list_store.get_iter(row_number))
        #log.debug("Removing GUI's slot for state changed signal.")
        command.child_state_changed_signal.disconnect(self.on_command_status_changed)
        command.child_pid_changed_signal.disconnect(self.on_command_child_pid_changed)
        command.ssh_error_signal.disconnect(self.on_ssh_error)
    
    def on_command_not_found(self, command, command_txt):
        log.debug("on_command_not_found %s" % (command))
        error_message = "Command %s not found on host %s.\nThe command line is %s." % (command, command.host, command_txt)
        dialogs.ErrorDialog.create(error_message)

    def on_ssh_error(self, command, error_message):
        log.debug("on_ssh_error %s" % (command))
        dialogs.ErrorDialog.create(error_message)

    def _update_row(self, command):
        list_store = self.model_sort.get_model()
        looking_for = command.identifier
        #log.debug "look for:", looking_for
        for row in iter(list_store):
            identifier = row[self.IDENTIFIER_COLUMN]
            if identifier == looking_for:
                #log.debug identifier, "MATCHES!!!!!!!!!"
                #TODO: update only columns how_many_times_run and child_state
                cells = self._format_command(command)
                for i in range(len(cells)):
                    row[i] = cells[i]
                break
            #for v in row:
            #    log.debug("updating row : %s" % (v))

    def _format_command(self, command):
        """
        Returns a list of values for the cells in the row of a command
        """
        host = "localhost"
        if command.host is not None:
            host = command.host
        executions = command.how_many_times_run
        #state = command.child_state
        state = command.get_state_info()
        return [
                command.identifier, 
                command.command,
                host,
                executions,
                state
            ]

    def on_menu_open_logs(self, *args):
        #TODO:
        if hasattr(self.master, "log_dir"):
            open_path(self.master.log_dir)
        #log.debug("open logs")

    def on_menu_view_master_log(self, *args):
        tail_master_log(self.master)

    def _create_main_menu(self, window):
        ui_string = """<ui>
          <menubar name='Menubar'>
            <menu action='FileMenu'>
              <menuitem action='OpenLoggingDir'/>
              <menuitem action='OpenMasterLog'/>
              <separator/>
              <menuitem action='Quit'/>
            </menu>
            <menu action='HelpMenu'>
              <menuitem action='About'/>
              <menuitem action='Manual'/>
            </menu>
          </menubar>
          </ui>
          """
        ag = gtk.ActionGroup('WindowActions')
        actions = [
            ('FileMenu', None, '_File'),
            ('OpenLoggingDir', None, '_OpenLoggingDir', None, _('Open Logging Directory'), self.on_menu_open_logs),
            ('OpenMasterLog', None, '_OpenMasterLog', None, _('Open the master log file'), self.on_menu_view_master_log),
            ('Quit',     gtk.STOCK_QUIT, '_Quit', '<control>Q', _('Quit'), self.destroy_app),
            ('HelpMenu', None, '_Help'),
            ('About',    gtk.STOCK_ABOUT, '_About', None, _('About the application'), self.on_about),
            ('Manual',    gtk.STOCK_HELP, '_Manual', None, _('Manual'), self.on_man_page),
            ]
        ag.add_actions(actions)
        self.ui_manager = gtk.UIManager()
        self.ui_manager.insert_action_group(ag, 0)
        self.ui_manager.add_ui_from_string(ui_string)
        window.add_accel_group(self.ui_manager.get_accel_group())
        return self.ui_manager.get_widget('/Menubar')

    def on_about(self, *args):
        #print "on about"
        self.show_about_dialog()
    
    def show_about_dialog(self):
        About().show_about_dialog()

    def on_man_page(self, *args):
        #print "on man page menu item chosen"
        man_lunch()
    
    def _get_currently_selected_command(self, show_error_if_none=True):
        """
        Returns a lunch.commands.Command object or None.
        """
        ret = None
        selection = self.tree_view_widget.get_selection()
        model, rows = selection.get_selected()
        if rows is None:
            ret = None
            if show_error_if_none:
                msg = _("Please select a process in the list.")
                d = defer.Deferred()
                dialog = dialogs.ErrorDialog(d, msg)
        else:
            # log.debug('getting the currently selected row in the tree view.')
            row = rows # only one row selected at a time in this version
            identifier = model.get_value(row, self.IDENTIFIER_COLUMN)
            # log.debug('id %s' % (identifier))
            ret = self.master.commands[identifier]
        return ret
        
    def on_openlog_clicked(self, widget):
        command = self._get_currently_selected_command()
        if command is not None:
            tail_child_log(command)

    def on_stop_command_clicked(self, widget):
        command = self._get_currently_selected_command()
        if command is not None:
            command.stop()
    
    def on_start_command_clicked(self, widget):
        command = self._get_currently_selected_command()
        if command is not None:
            command.start()

    def on_command_status_changed(self, command, new_state):
        """
        Called when the child_state_changed_signal of the command is triggered.
        @param command L{lunch.commands.Command} 
        @param new_state str
        """
        log.debug("lunch-child %s> Its state changed to %s" % (command.identifier, new_state))
        self._update_command(command)

    def on_command_child_pid_changed(self, command, new_pid):
        """
        Called when the child_pid_changed_signal of the command is triggered.
        @param command L{lunch.commands.Command} 
        @param new_pid int
        """
        log.debug("lunch-child %s> Its PID changed to %s" % (command.identifier, new_pid))
        self._update_command(command)

    def _update_command(self, command):
        self._update_row(command)
        self._update_buttons_according_to_selected_contact()
        self._update_text_in_textview_if_command_is_selected(command)
        

    def destroy_app(self, widget, data=None):
        """
        Destroy method causes application to exit
        when main window closed
        
        If you return FALSE in the "delete_event" signal handler,
        GTK will emit the "destroy" signal. Returning TRUE means
        you don't want the window to be destroyed.
        This is useful for popping up 'are you sure you want to quit?'
        type dialogs. 
        """
        return self.confirm_and_quit()
    
    def confirm_and_quit(self):
        """
        If needed, ask the user if he really wants to quit, and then quit if
        the answer is yes.
        
        @rettype: bool
        """
        still_some_running = False
        for c in self.master._get_all():
            if c.child_state == STATE_RUNNING:
                still_some_running = True
        
        def _cb(result):
            if result:
                log.info("Destroying the Lunch window.")
                if reactor.running:
                    log.info("reactor.stop()")
                    reactor.stop()
            else:
                log.info("Not quitting.")
        if self.confirm_close and still_some_running:
            d = dialogs.YesNoDialog.create(_("Really quit ?\nAll launched processes will quit as well."))
            d.addCallback(_cb)
            return True
        else:
            _cb(True)
            return False

def start_gui(lunch_master):
    """
    Starts the GTK GUI
    :rettype: L{LunchApp}
    """
    log.info("Starting the GUI.")
    app = LunchApp(lunch_master)
    #self.slave_state_changed_signal = sig.Signal()
    return app