#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# By Elvish_Hunter, April 2014

# You may notice that this script, unlike all our other Python mainline scripts,
# has a .pyw extension, instead of .py. *This is deliberate*. On Windows, .pyw
# scripts are started directly in GUI mode, without opening a prompt.
# This is, after all, the behavior that we want.

# threading and subprocess are needed to run wmllint without freezing the window
# codecs is used to save files as UTF8
# queue is needed to exchange informations between threads
# if we use the run_tool thread to do GUI stuff we obtain weird crashes
# This happens because Tk is a single-thread GUI
import sys,os,threading,subprocess,codecs

import queue
# tkinter modules
from tkinter import *
from tkinter.messagebox import *
from tkinter.filedialog import *
import tkinter.font as font
# ttk must be called last
from tkinter.ttk import *

# we need to know in what series we are
# so set it in a constant and change it for every new series
# it must be a string
WESNOTH_SERIES="1.13"

# get the location where the script is placed
# we'll check later if this is a Wesnoth directory
# and use it to generate the command lines
# os.path.realpath gets the full path of this script,
# while removing any symlink
# This allows users to create a link to the app on their desktop
# os.path.normpath allows Windows users to see their standard path separators
APP_DIR,APP_NAME=os.path.split(os.path.realpath(sys.argv[0]))
upper_dir=APP_DIR.split(os.sep)
upper_dir.pop()
WESNOTH_DATA_DIR=os.sep.join(upper_dir)
WESNOTH_CORE_DIR=os.path.normpath(os.path.join(WESNOTH_DATA_DIR,"core"))

def wrap_elem(line):
    """If the supplied line contains spaces, return it wrapped between double quotes"""
    if ' ' in line:
        return "\"{0}\"".format(line)
    return line

def run_tool(tool,queue,command):
    """Runs a maintenance tool with the desired arguments and pushes the output in the supplied queue"""
    # set the encoding for the subprocess
    # otherwise, with the new Unicode literals used by the wml tools,
    # we may get UnicodeDecodeErros
    env=os.environ
    env['PYTHONIOENCODING']="utf8"
    if sys.platform=="win32":
        # Windows wants a string, Linux wants a list and Polly wants a cracker
        # Windows wants also strings flavoured with double quotes
        # since maps return iterators, we must cast them as lists, otherwise join won't work
        # not doing this causes an OSError: [WinError 87]
        # this doesn't happen on Python 2.7, because here map() returns a list
        wrapped_line=list(map(wrap_elem,command))
        queue.put_nowait(' '.join(wrapped_line)+"\n")
        si=subprocess.STARTUPINFO()
        si.dwFlags=subprocess.STARTF_USESHOWWINDOW|subprocess.SW_HIDE # to avoid showing a DOS prompt
        try:
            output=subprocess.check_output(' '.join(wrapped_line),stderr=subprocess.STDOUT,startupinfo=si,env=env)
            queue.put_nowait(str(output, "utf8"))
        except subprocess.CalledProcessError as error:
            # post the precise message and the remaining output as a tuple
            queue.put_nowait((tool,error.returncode,str(error.output, "utf8")))
    else: # STARTUPINFO is not available, nor needed, outside of Windows
        queue.put_nowait(' '.join(command)+"\n")
        try:
            output=subprocess.check_output(command,stderr=subprocess.STDOUT,env=env)
            queue.put_nowait(str(output, "utf8"))
        except subprocess.CalledProcessError as error:
            # post the precise message and the remaining output as a tuple
            queue.put_nowait((tool,error.returncode, str(error.output, "utf8")))

def is_wesnoth_tools_path(path):
    """Checks if the supplied path may be a wesnoth/data/tools directory"""
    lower_path=path.lower()
    if "wesnoth" in lower_path and \
       "data" in lower_path and \
       "tools" in lower_path:
        return True
    return False

def attach_context_menu(widget,function):
    # on Mac the right button fires a Button-2 event, or so I'm told
    # some mice don't even have two buttons, so the user is forced
    # to use Command + the only button
    # bear in mind that I don't have a Mac, so this point may be bugged
    # bind also the context menu key, for those keyboards that have it
    # that is, most of the Windows and Linux ones (however, in Win it's
    # called App, while on Linux is called Menu)
    # Mac doesn't have a context menu key on its keyboards, so no binding
    # bind also the Shift+F10 shortcut (same as Menu/App key)
    # the call to tk windowingsystem is justified by the fact
    # that it is possible to install X11 over Darwin
    windowingsystem = widget.tk.call('tk', 'windowingsystem')
    if windowingsystem == "win32": # Windows, both 32 and 64 bit
        widget.bind("<Button-3>", function)
        widget.bind("<KeyPress-App>", function)
        widget.bind("<Shift-KeyPress-F10>", function)
    elif windowingsystem == "aqua": # MacOS with Aqua
        widget.bind("<Button-2>", function)
        widget.bind("<Control-Button-1>", function)
    elif windowingsystem == "x11": # Linux, FreeBSD, Darwin with X11
        widget.bind("<Button-3>", function)
        widget.bind("<KeyPress-Menu>", function)
        widget.bind("<Shift-KeyPress-F10>", function)

def attach_select_all(widget,function):
    # bind the "select all" key shortcut
    # again, Mac uses Command instead of Control
    windowingsystem = widget.tk.call('tk', 'windowingsystem')
    if windowingsystem == "win32":
        widget.bind("<Control-KeyRelease-a>", function)
    elif windowingsystem == "aqua":
        widget.bind("<Command-KeyRelease-a>", function)
    elif windowingsystem == "x11":
        widget.bind("<Control-KeyRelease-a>", function)

class Tooltip(Toplevel):
    def __init__(self,widget,text,tag=None):
        """A tooltip, or balloon. Displays the specified help text when the
mouse pointer stays on the widget for more than 500 ms."""
        # the master attribute retrieves the window where our "parent" widget is
        super().__init__(widget.master)
        self.widget=widget
        self.preshow_id=None
        self.show_id=None
        self.label=Label(self,
                         text=text,
                         background="#ffffe1", # background color used on Windows
                         borderwidth=1,
                         relief=SOLID,
                         padding=1,
                         # Tk has a bunch of predefined fonts
                         # use the one specific for tooltips
                         font=font.nametofont("TkTooltipFont"))
        self.label.pack()
        self.overrideredirect(True)
        # allow binding the tooltips to tagged elements of a widget
        # only Text, Canvas and Treeview support tags
        # and as such, they have a tag_bind method
        # if the widget doesn't support tags, bind directly to it
        if tag and hasattr(widget, "tag_bind") and callable(widget.tag_bind):
            self.widget.tag_bind(tag,"<Enter>",self.preshow)
            self.widget.tag_bind(tag,"<Leave>",self.hide)
        else:
            self.widget.bind("<Enter>",self.preshow)
            self.widget.bind("<Leave>",self.hide)
        self.bind_all("<Button>",self.hide)
        self.withdraw()
    def preshow(self,event=None):
        self.after_cleanup()
        # 500 ms and 5000 ms are the default values used on Windows
        self.preshow_id=self.after(500,self.show)
    def show(self):
        self.after_cleanup()
        # check if the tooltip will end up out of the screen
        # and handle this case if so
        screen_width = self.winfo_screenwidth()
        tooltip_width = self.winfo_reqwidth()
        if tooltip_width + self.winfo_pointerx() > screen_width:
            # unfortunately, it seems like Tkinter doesn't have a way to check the pointer's size
            # so I'm using a value of 20px, which is enough for the usual 16px pointers
            self.geometry("+%d+%d" % (screen_width-tooltip_width,self.winfo_pointery()+20))
        else:
            self.geometry("+%d+%d" % (self.winfo_pointerx(),self.winfo_pointery()+20))
        # update_idletasks forces a geometry update
        self.update_idletasks()
        self.state("normal")
        self.lift()
        self.show_id=self.after(5000, self.hide)
    def hide(self,event=None):
        self.after_cleanup()
        self.withdraw()
    def after_cleanup(self):
        # each event should cleanup after itself,
        # to avoid having two .after() calls conflicting
        # for example, one previously scheduled .after() may
        # try to hide the tooltip before five seconds are passed
        if self.show_id:
            self.after_cancel(self.show_id)
            self.show_id=None
        if self.preshow_id:
            self.after_cancel(self.preshow_id)
            self.preshow_id=None
    def set_text(self,text):
        self.label.configure(text=text)
        self.update_idletasks()

class Popup(Toplevel):
    def __init__(self,parent,tool,thread):
        """Creates a popup that informs the user that the desired tool is running.
Self destroys when the tool thread is over"""
        self.thread=thread
        super().__init__(parent)
        self.transient(parent)
        self.grab_set()
        self.protocol("WM_DELETE_WINDOW",
                      lambda: None) # disable close button
        self.resizable(width=False,
                       height=False)
        frame=Frame(self)
        frame.pack(fill=BOTH,expand=YES)
        wait_label=Label(frame,
                         text="{0} is running\nPlease wait...".format(tool),
                         justify=CENTER)
        wait_label.grid(row=0,
                        column=0,
                        padx=5,
                        pady=5)
        wait_progress=Progressbar(frame,
                                  mode="indeterminate")
        wait_progress.grid(row=1,
                           column=0,
                           sticky=E+W,
                           padx=5,
                           pady=5)
        frame.columnconfigure(0,weight=1)
        # place the popup in the middle of the main window
        # get the main window position and dimension
        self.geometry("{0}x{1}+{2}+{3}".format(400,
                                               80,
                                               int(root.winfo_rootx()+(root.winfo_width()-400)/2),
                                               int(root.winfo_rooty()+(root.winfo_height()-80)/2)))
        wait_progress.start(10)
        self.check_thread_alive()
    def check_thread_alive(self):
        """Checks if the thread is still alive, and destroys the window if it isn't"""
        # placing this in a for or while cycle freezes the app
        # so we need to use the .after method and recursively call the function
        # that's one of the many quirks of Tkinter
        if self.thread.isAlive():
            self.after(100,self.check_thread_alive)
        else:
            self.after(1,self.destroy)

class ContextMenu(Menu):
    def __init__(self,x,y,widget):
        """A subclass of Menu, used to display a context menu in Text and Entry widgets
If the widget isn't active, some options do not appear"""
        super().__init__(None,tearoff=0) # otherwise Tk allows splitting it in a new window
        self.widget=widget
        # MacOS uses a key called Command, instead of the usual Control used by Windows and Linux
        # so prepare the accelerator strings accordingly
        # For future reference, Mac also uses Option instead of Alt
        # also, a little known fact about Python is that it *does* support using the ternary operator
        # like in this case
        control_key = "Command" if self.tk.call('tk', 'windowingsystem') == "aqua" else "Ctrl"
        # str is necessary because in some instances a Tcl_Obj is returned instead of a string
        if str(widget.cget('state')) in (ACTIVE,NORMAL): # do not add if state is readonly or disabled
            self.add_command(label="Cut",
                             image=ICONS['cut'],
                             compound=LEFT,
                             accelerator='%s+X' % (control_key),
                             command=lambda: self.widget.event_generate("<<Cut>>"))
        self.add_command(label="Copy",
                         image=ICONS['copy'],
                         compound=LEFT,
                         accelerator='%s+C' % (control_key),
                         command=lambda: self.widget.event_generate("<<Copy>>"))
        if str(widget.cget('state')) in (ACTIVE,NORMAL):
            self.add_command(label="Paste",
                             image=ICONS['paste'],
                             compound=LEFT,
                             accelerator='%s+V' % (control_key),
                             command=lambda: self.widget.event_generate("<<Paste>>"))
        self.add_separator()
        self.add_command(label="Select all",
                         image=ICONS['select_all'],
                         compound=LEFT,
                         accelerator='%s+A' % (control_key),
                         command=self.on_select_all)
        self.tk_popup(x,y) # self.post does not destroy the menu when clicking out of it
    def on_select_all(self):
        # disabled Text widgets have a different way to handle selection
        if isinstance(self.widget,Text):
            # adding a SEL tag to a chunk of text causes it to be selected
            self.widget.tag_add(SEL,"1.0",END)
        elif isinstance(self.widget,Entry) or \
             isinstance(self.widget,Combobox):
            # apparently, the <<SelectAll>> event doesn't fire correctly if the widget is readonly
            self.widget.select_range(0,END)
        elif isinstance(self.widget,Spinbox):
            self.widget.selection("range",0,END)

class EntryContext(Entry):
    def __init__(self,parent,**kwargs):
        """An enhanced Entry widget that has a right-click menu
Use like any other Entry widget"""
        super().__init__(parent,**kwargs)
        attach_context_menu(self,self.on_context_menu)
        attach_select_all(self,self.on_select_all)
    def on_context_menu(self,event):
        if str(self.cget('state')) != DISABLED:
            ContextMenu(event.x_root,event.y_root,event.widget)
    def on_select_all(self,event):
        self.select_range(0,END)

class SpinboxContext(Spinbox):
    def __init__(self,parent,**kwargs):
        """An enhanced Spinbox widget that has a right-click menu
Use like any other Spinbox widget"""
        super().__init__(parent,**kwargs)
        attach_context_menu(self,self.on_context_menu)
        attach_select_all(self,self.on_select_all)
    def on_context_menu(self,event):
        if str(self.cget('state')) != DISABLED:
            ContextMenu(event.x_root,event.y_root,event.widget)
    def on_select_all(self,event):
        self.selection("range",0,END)

class EnhancedText(Text):
    def __init__(self,*args,**kwargs):
        """A subclass of Text with a context menu
Use it like any other Text widget"""
        super().__init__(*args,**kwargs)
        attach_context_menu(self,self.on_context_menu)
        attach_select_all(self,self.on_select_all)
    def on_context_menu(self,event):
        # the disabled state in a Text widget is pretty much
        # like the readonly state in Entry, hence no state check
        ContextMenu(event.x_root,event.y_root,event.widget)
    def on_select_all(self,event):
        self.tag_add(SEL,"1.0",END)

class SelectDirectory(LabelFrame):
    def __init__(self,parent,textvariable=None,**kwargs):
        """A subclass of LabelFrame sporting a readonly Entry and a Button with a folder icon.
It comes complete with a context menu and a directory selection screen"""
        super().__init__(parent,text="Directory",**kwargs)
        self.textvariable=textvariable
        self.dir_entry=EntryContext(self,
                                    width=40,
                                    textvariable=self.textvariable,
                                    state="readonly")
        self.dir_entry.pack(side=LEFT,
                            fill=BOTH,
                            expand=YES)
        self.dir_button=Button(self,
                               image=ICONS['browse'],
                               compound=LEFT,
                               text="Browse...",
                               command=self.on_browse)
        self.dir_button.pack(side=LEFT)
        self.clear_button=Button(self,
                                 image=ICONS['clear16'],
                                 compound=LEFT,
                                 text="Clear",
                                 command=self.on_clear)
        self.clear_button.pack(side=LEFT)
    def on_browse(self):
        # if the user already selected a directory, try to use it
        current_dir=self.textvariable.get()
        if os.path.exists(current_dir):
            directory=askdirectory(initialdir=current_dir)
        # otherwise attempt to detect the user's userdata folder
        else:
            # os.path.expanduser gets the current user's home directory on every platform
            if sys.platform=="win32":
                # get userdata directory on Windows
                # it assumes that you choose to store userdata in the My Games directory
                # while installing Wesnoth
                userdata=os.path.join(os.path.expanduser("~"),
                                      "Documents",
                                      "My Games",
                                      "Wesnoth"+WESNOTH_SERIES,
                                      "data",
                                      "add-ons")
            elif sys.platform.startswith("linux") or "bsd" in sys.platform:
                # we're on Linux or on a BSD system like FreeBSD
                userdata=os.path.join(os.path.expanduser("~"),
                                      ".local",
                                      "share",
                                      "wesnoth",
                                      WESNOTH_SERIES,
                                      "data",
                                      "add-ons")
            elif sys.platform=="darwin": # we're on MacOS
                # bear in mind that I don't have a Mac, so this point may be bugged
                userdata=os.path.join(os.path.expanduser("~"),
                                      "Library",
                                      "Application Support",
                                      "Wesnoth_"+WESNOTH_SERIES,
                                      "data",
                                      "add-ons")
            else: # unknown system; if someone else wants to add other rules, be my guest
                userdata="."

            if os.path.exists(userdata): # we may have gotten it wrong
                directory=askdirectory(initialdir=userdata)
            else:
                directory=askdirectory(initialdir=".")
        
        if directory:
            # use os.path.normpath, so on Windows the usual backwards slashes are correctly shown
            self.textvariable.set(os.path.normpath(directory))
    def on_clear(self):
        self.textvariable.set("")

class WmllintTab(Frame):
    def __init__(self,parent):
        # it means super(WmllintTab,self), that in turn means
        # Frame.__init__(self,parent)
        super().__init__(parent)
        self.mode_variable=IntVar()
        self.mode_frame=LabelFrame(self,
                                   text="wmllint mode")
        self.mode_frame.grid(row=0,
                             column=0,
                             sticky=N+E+S+W)
        self.radio_normal=Radiobutton(self.mode_frame,
                                      text="Normal",
                                      variable=self.mode_variable,
                                      value=0)
        self.radio_normal.grid(row=0,
                               column=0,
                               sticky=W,
                               padx=10)
        self.tooltip_normal=Tooltip(self.radio_normal,
                                    "Perform file conversion")
        self.radio_dryrun=Radiobutton(self.mode_frame,
                                      text="Dry run",
                                      variable=self.mode_variable,
                                      value=1)
        self.radio_dryrun.grid(row=1,
                               column=0,
                               sticky=W,
                               padx=10)
        self.tooltip_dryrun=Tooltip(self.radio_dryrun,
                                    "Do not perform changes")
        self.radio_clean=Radiobutton(self.mode_frame,
                                     text="Clean",
                                     variable=self.mode_variable,
                                     value=2)
        self.radio_clean.grid(row=2,
                              column=0,
                              sticky=W,
                              padx=10)
        self.tooltip_clean=Tooltip(self.radio_clean,
                                   "Delete *.bak files")
        self.radio_diff=Radiobutton(self.mode_frame,
                                    text="Diff",
                                    variable=self.mode_variable,
                                    value=3)
        self.radio_diff.grid(row=3,
                             column=0,
                             sticky=W,
                             padx=10)
        self.tooltip_diff=Tooltip(self.radio_diff,
                                  "Show differences in converted files")
        self.radio_revert=Radiobutton(self.mode_frame,
                                      text="Revert",
                                      variable=self.mode_variable,
                                      value=4)
        self.radio_revert.grid(row=4,
                               column=0,
                               sticky=W,
                               padx=10)
        self.tooltip_revert=Tooltip(self.radio_revert,
                                    "Revert conversions using *.bak files")
        self.verbosity_frame=LabelFrame(self,
                                        text="Verbosity level")
        self.verbosity_frame.grid(row=0,
                                  column=1,
                                  sticky=N+E+S+W)
        self.verbosity_variable=IntVar()
        self.radio_v0=Radiobutton(self.verbosity_frame,
                                  text="Terse",
                                  variable=self.verbosity_variable,
                                  value=0)
        self.radio_v0.grid(row=0,
                           column=0,
                           sticky=W,
                           padx=10)
        self.radio_v1=Radiobutton(self.verbosity_frame,
                                  text="List changes",
                                  variable=self.verbosity_variable,
                                  value=1)
        self.radio_v1.grid(row=1,
                           column=0,
                           sticky=W,
                           padx=10)
        self.radio_v2=Radiobutton(self.verbosity_frame,
                                  text="Name files before processing",
                                  variable=self.verbosity_variable,
                                  value=2)
        self.radio_v2.grid(row=2,
                           column=0,
                           sticky=W,
                           padx=10)
        self.radio_v3=Radiobutton(self.verbosity_frame,
                                  text="Show parse details",
                                  variable=self.verbosity_variable,
                                  value=3)
        self.radio_v3.grid(row=3,
                           column=0,
                           sticky=W,
                           padx=10)
        self.options_frame=LabelFrame(self,
                                      text="wmllint options")
        self.options_frame.grid(row=0,
                                column=2,
                                sticky=N+E+S+W)
        self.stripcr_variable=BooleanVar()
        self.stripcr_check=Checkbutton(self.options_frame,
                                       text="Convert EOL characters to Unix style",
                                       variable=self.stripcr_variable)
        self.stripcr_check.grid(row=0,
                                column=0,
                                sticky=W,
                                padx=10)
        self.missing_variable=BooleanVar()
        self.missing_check=Checkbutton(self.options_frame,
                                        text="Don't warn about tags without side= keys",
                                        variable=self.missing_variable)
        self.missing_check.grid(row=1,
                                 column=0,
                                 sticky=W,
                                 padx=10)
        self.known_variable=BooleanVar()
        self.known_check=Checkbutton(self.options_frame,
                                     text="Disable checks for unknown units",
                                     variable=self.known_variable)
        self.known_check.grid(row=2,
                              column=0,
                              sticky=W,
                              padx=10)
        self.spell_variable=BooleanVar()
        self.spell_check=Checkbutton(self.options_frame,
                                     text="Disable spellchecking",
                                     variable=self.spell_variable)
        self.spell_check.grid(row=3,
                              column=0,
                              sticky=W,
                              padx=10)
        self.freeze_variable=BooleanVar()
        self.freeze_check=Checkbutton(self.options_frame,
                                      text="Ignore newlines in messages",
                                      variable=self.freeze_variable)
        self.freeze_check.grid(row=4,
                               column=0,
                               sticky=W,
                               padx=10)
        self.skip_variable=BooleanVar()
        self.skip_core=Checkbutton(self.options_frame,
                                   text="Skip core directory",
                                   variable=self.skip_variable,
                                   command=self.skip_core_dir_callback)
        self.skip_core.grid(row=5,
                               column=0,
                               sticky=W,
                               padx=10)
        self.columnconfigure(0,weight=1)
        self.columnconfigure(1,weight=1)
        self.columnconfigure(2,weight=1)
    def skip_core_dir_callback(self):
        # if Skip core directory is enabled
        # avoid checking for unknown unit types
        if self.skip_variable.get():
            self.known_variable.set(True)
            self.known_check.configure(state=DISABLED)
        else:
            self.known_variable.set(False)
            self.known_check.configure(state=NORMAL)

class WmlscopeTab(Frame):
    def __init__(self,parent):
        super().__init__(parent)
        self.options_frame=LabelFrame(self,
                                      text="wmlscope options")
        self.options_frame.grid(row=0,
                                column=0,
                                sticky=N+E+S+W)
        self.normal_options=Frame(self.options_frame)
        self.normal_options.grid(row=0,
                                 column=0,
                                 sticky=N+E+S+W)
        self.crossreference_variable=BooleanVar() # equivalent to warnlevel 1
        self.crossreference_check=Checkbutton(self.normal_options,
                                              text="Check for duplicate macro definitions",
                                              variable=self.crossreference_variable)
        self.crossreference_check.grid(row=0,
                                       column=0,
                                       sticky=W,
                                       padx=10)
        self.collisions_variable=BooleanVar()
        self.collisions_check=Checkbutton(self.normal_options,
                                          text="Check for duplicate resource files",
                                          variable=self.collisions_variable)
        self.collisions_check.grid(row=1,
                                   column=0,
                                   sticky=W,
                                   padx=10)
        self.definitions_variable=BooleanVar()
        self.definitions_check=Checkbutton(self.normal_options,
                                           text="Make definition list",
                                           variable=self.definitions_variable)
        self.definitions_check.grid(row=2,
                                    column=0,
                                    sticky=W,
                                    padx=10)
        self.listfiles_variable=BooleanVar()
        self.listfiles_check=Checkbutton(self.normal_options,
                                         text="List files that will be processed",
                                         variable=self.listfiles_variable)
        self.listfiles_check.grid(row=3,
                                  column=0,
                                  sticky=W,
                                  padx=10)
        self.unresolved_variable=BooleanVar()
        self.unresolved_check=Checkbutton(self.normal_options,
                                          text="Report unresolved macro references",
                                          variable=self.unresolved_variable)
        self.unresolved_check.grid(row=4,
                                   column=0,
                                   sticky=W,
                                   padx=10)
        self.extracthelp_variable=BooleanVar()
        self.extracthelp_check=Checkbutton(self.normal_options,
                                           text="Extract help from macro definition comments",
                                           variable=self.extracthelp_variable)
        self.extracthelp_check.grid(row=5,
                                    column=0,
                                    sticky=W,
                                    padx=10)
        self.unchecked_variable=BooleanVar()
        self.unchecked_check=Checkbutton(self.normal_options,
                                         text="Report all macros with untyped formals",
                                         variable=self.unchecked_variable)
        self.unchecked_check.grid(row=6,
                                  column=0,
                                  sticky=W,
                                  padx=10)
        self.progress_variable=BooleanVar()
        self.progress_check=Checkbutton(self.normal_options,
                                        text="Show progress",
                                        variable=self.progress_variable)
        self.progress_check.grid(row=7,
                                 column=0,
                                 sticky=W,
                                 padx=10)
        self.separator=Separator(self.options_frame,
                                 orient=VERTICAL)
        self.separator.grid(row=0,
                            column=1,
                            sticky=N+S)
        self.options_with_regexp=Frame(self.options_frame)
        self.options_with_regexp.grid(row=0,
                                      column=2,
                                      sticky=N+E+S+W)
        self.exclude_variable=BooleanVar()
        self.exclude_check=Checkbutton(self.options_with_regexp,
                                       text="Exclude files matching regexp:",
                                       variable=self.exclude_variable,
                                       command=self.exclude_callback)
        self.exclude_check.grid(row=0,
                                column=0,
                                sticky=W,
                                padx=10)
        self.exclude_regexp=StringVar()
        self.exclude_entry=EntryContext(self.options_with_regexp,
                                        textvariable=self.exclude_regexp,
                                        state=DISABLED)
        self.exclude_entry.grid(row=0,
                                column=1,
                                sticky=E+W,
                                padx=10)
        self.from_variable=BooleanVar()
        self.from_check=Checkbutton(self.options_with_regexp,
                                    text="Exclude files not matching regexp:",
                                    variable=self.from_variable,
                                    command=self.from_callback)
        self.from_check.grid(row=1,
                             column=0,
                             sticky=W,
                             padx=10)
        self.from_regexp=StringVar()
        self.from_entry=EntryContext(self.options_with_regexp,
                                     textvariable=self.from_regexp,
                                     state=DISABLED)
        self.from_entry.grid(row=1,
                             column=1,
                             sticky=E+W,
                             padx=10)
        self.refcount_variable=BooleanVar()
        self.refcount_check=Checkbutton(self.options_with_regexp,
                                        text="Report only on macros referenced\nin at least n files:",
                                        variable=self.refcount_variable,
                                        command=self.refcount_callback)
        self.refcount_check.grid(row=2,
                                 column=0,
                                 sticky=W,
                                 padx=10)
        self.refcount_number=IntVar()
        self.refcount_spin=SpinboxContext(self.options_with_regexp,
                                          from_=0,to=999,
                                          textvariable=self.refcount_number,
                                          width=3,
                                          state=DISABLED)
        self.refcount_spin.grid(row=2,
                                column=1,
                                sticky=E+W,
                                padx=10)
        self.typelist_variable=BooleanVar()
        self.typelist_check=Checkbutton(self.options_with_regexp,
                                        text="List actual & formal argtypes\nfor calls in fname",
                                        variable=self.typelist_variable,
                                        command=self.typelist_callback)
        self.typelist_check.grid(row=3,
                                 column=0,
                                 sticky=W,
                                 padx=10)
        self.typelist_string=StringVar()
        self.typelist_entry=EntryContext(self.options_with_regexp,
                                         textvariable=self.typelist_string,
                                         state=DISABLED)
        self.typelist_entry.grid(row=3,
                                 column=1,
                                 sticky=E+W,
                                 padx=10)
        self.force_variable=BooleanVar()
        self.force_check=Checkbutton(self.options_with_regexp,
                                     text="Ignore refcount 0 on names\nmatching regexp:",
                                     variable=self.force_variable,
                                     command=self.force_callback)
        self.force_check.grid(row=4,
                              column=0,
                              sticky=W,
                              padx=10)
        self.force_regexp=StringVar()
        self.force_entry=EntryContext(self.options_with_regexp,
                                      textvariable=self.force_regexp,
                                      state=DISABLED)
        self.force_entry.grid(row=4,
                              column=1,
                              sticky=E+W,
                              padx=10)
        self.columnconfigure(0,weight=1)
        self.options_frame.columnconfigure(0,weight=1)
        self.options_frame.columnconfigure(2,weight=1)
        self.options_with_regexp.columnconfigure(1,weight=1)
        # uniform= makes the options in the options_with_regexp frame evenly sized
        # please note that "regexp" is an ID of the widget group, not a special value
        # you can replace "regexp" with "bacon" and it still works...
        for row in range(5):
            self.options_with_regexp.rowconfigure(row,uniform="regexp")
    def exclude_callback(self):
        if self.exclude_variable.get():
            self.exclude_entry.configure(state=NORMAL)
        else:
            self.exclude_entry.configure(state=DISABLED)
    def from_callback(self):
        if self.from_variable.get():
            self.from_entry.configure(state=NORMAL)
        else:
            self.from_entry.configure(state=DISABLED)
    def refcount_callback(self):
        if self.refcount_variable.get():
            self.refcount_spin.configure(state="readonly")
        else:
            self.refcount_spin.configure(state=DISABLED)
    def typelist_callback(self):
        if self.typelist_variable.get():
            self.typelist_entry.configure(state=NORMAL)
        else:
            self.typelist_entry.configure(state=DISABLED)
    def force_callback(self):
        if self.force_variable.get():
            self.force_entry.configure(state=NORMAL)
        else:
            self.force_entry.configure(state=DISABLED)

class WmlindentTab(Frame):
    def __init__(self,parent):
        super().__init__(parent)
        self.mode_variable=IntVar()
        self.mode_frame=LabelFrame(self,
                                   text="wmlindent mode")
        self.mode_frame.grid(row=0,
                             column=0,
                             sticky=N+E+S+W)
        self.radio_normal=Radiobutton(self.mode_frame,
                                      text="Normal",
                                      variable=self.mode_variable,
                                      value=0)
        self.radio_normal.grid(row=0,
                               column=0,
                               sticky=W,
                               padx=10)
        self.tooltip_normal=Tooltip(self.radio_normal,
                                    "Perform file conversion")
        self.radio_dryrun=Radiobutton(self.mode_frame,
                                      text="Dry run",
                                      variable=self.mode_variable,
                                      value=1)
        self.radio_dryrun.grid(row=1,
                               column=0,
                               sticky=W,
                               padx=10)
        self.tooltip_dryrun=Tooltip(self.radio_dryrun,
                                    "Do not perform changes")
        self.verbosity_frame=LabelFrame(self,
                                        text="Verbosity level")
        self.verbosity_frame.grid(row=0,
                                  column=1,
                                  sticky=N+E+S+W)
        self.verbosity_variable=IntVar()
        self.radio_v0=Radiobutton(self.verbosity_frame,
                                  text="Terse",
                                  variable=self.verbosity_variable,
                                  value=0)
        self.radio_v0.grid(row=0,
                           column=0,
                           sticky=W,
                           padx=10)
        self.radio_v1=Radiobutton(self.verbosity_frame,
                                  text="Verbose",
                                  variable=self.verbosity_variable,
                                  value=1)
        self.radio_v1.grid(row=1,
                           column=0,
                           sticky=W,
                           padx=10)
        self.radio_v2=Radiobutton(self.verbosity_frame,
                                  text="Report unchanged files",
                                  variable=self.verbosity_variable,
                                  value=2)
        self.radio_v2.grid(row=2,
                           column=0,
                           sticky=W,
                           padx=10)
        self.options_frame=LabelFrame(self,
                                      text="wmlindent options")
        self.options_frame.grid(row=0,
                                column=2,
                                sticky=N+E+S+W)
        self.exclude_variable=BooleanVar()
        self.exclude_check=Checkbutton(self.options_frame,
                                       text="Exclude files\nmatching regexp:",
                                       variable=self.exclude_variable,
                                       command=self.exclude_callback)
        self.exclude_check.grid(row=1,
                                column=0,
                                columnspan=2,
                                sticky=W,
                                padx=10)
        self.regexp_variable=StringVar()
        self.regexp_entry=EntryContext(self.options_frame,
                                       textvariable=self.regexp_variable,
                                       state=DISABLED)
        self.regexp_entry.grid(row=1,
                               column=1,
                               sticky=E+W,
                               padx=10)
        self.quiet_variable=BooleanVar()
        self.quiet_check=Checkbutton(self.options_frame,
                                     text="Do not generate output",
                                     variable=self.quiet_variable)
        self.quiet_check.grid(row=2,
                              column=0,
                              sticky=W,
                              padx=10)
        self.columnconfigure(0,weight=1)
        self.columnconfigure(1,weight=1)
        self.columnconfigure(2,weight=1)
        self.options_frame.columnconfigure(1,weight=1)
    def exclude_callback(self):
        if self.exclude_variable.get():
            self.regexp_entry.configure(state=NORMAL)
        else:
            self.regexp_entry.configure(state=DISABLED)

class MainFrame(Frame):
    def __init__(self,parent):
        self.parent=parent
        self.queue=queue.Queue()
        super().__init__(parent)
        self.grid(sticky=N+E+S+W)
        self.buttonbox=Frame(self)
        self.buttonbox.grid(row=0,
                            column=0,
                            sticky=E+W)
        self.run_button=Button(self.buttonbox,
                               image=ICONS['run'],
                               command=self.on_run_wmllint)
        self.run_button.pack(side=LEFT,
                             padx=5,
                             pady=5)
        self.run_tooltip=Tooltip(self.run_button,"Run wmllint")
        self.save_button=Button(self.buttonbox,
                                image=ICONS['save'],
                                command=self.on_save)
        self.save_button.pack(side=LEFT,
                              padx=5,
                              pady=5)
        self.save_tooltip=Tooltip(self.save_button,"Save as text...")
        self.clear_button=Button(self.buttonbox,
                                 image=ICONS['clear'],
                                 command=self.on_clear)
        self.clear_button.pack(side=LEFT,
                               padx=5,
                               pady=5)
        self.clear_tooltip=Tooltip(self.clear_button,"Clear output")
        self.about_button=Button(self.buttonbox,
                                 image=ICONS['about'],
                                 command=self.on_about)
        self.about_button.pack(side=LEFT,
                               padx=5,
                               pady=5)
        self.about_tooltip=Tooltip(self.about_button,"About...")
        self.exit_button=Button(self.buttonbox,
                                image=ICONS['exit'],
                                command=self.on_quit)
        self.exit_button.pack(side=RIGHT,
                              padx=5,
                              pady=5)
        self.exit_tooltip=Tooltip(self.exit_button,"Exit")
        self.dir_variable=StringVar()
        self.dir_frame=SelectDirectory(self,
                                       textvariable=self.dir_variable)
        self.dir_frame.grid(row=1,
                            column=0,
                            sticky=E+W)
        # Notebook is one of the new widgets introduced by ttk
        # it isn't available on Python 2.6 and lower, like the rest of ttk widgets
        # please note that the Frames that become tabs don't need to be packed or gridded
        self.notebook=Notebook(self)
        self.notebook.grid(row=2,
                           column=0,
                           sticky=E+W)
        self.wmllint_tab=WmllintTab(None)
        self.notebook.add(self.wmllint_tab,
                          text="wmllint",
                          sticky=N+E+S+W)
        self.wmlscope_tab=WmlscopeTab(None)
        self.notebook.add(self.wmlscope_tab,
                          text="wmlscope",
                          sticky=N+E+S+W)
        self.wmlindent_tab=WmlindentTab(None)
        self.notebook.add(self.wmlindent_tab,
                          text="wmlindent",
                          sticky=N+E+S+W)
        self.output_frame=LabelFrame(self,
                                     text="Output")
        self.output_frame.grid(row=3,
                               column=0,
                               sticky=N+E+S+W)
        # in former versions of this script, I disabled the text widget at its creation
        # it turned out that doing so on Aqua (Mac OS) causes the widget to ignore
        # any additional binding set after its disabling
        # the subclass EnhancedText first calls the constructor of the original Text widget
        # and only later it creates its own bindings
        # so first create the widget, and disable it later
        self.text=EnhancedText(self.output_frame,
                               wrap=WORD,
                               takefocus=True)
        self.text.configure(state=DISABLED)
        self.text.grid(row=0,
                       column=0,
                       sticky=N+E+S+W)
        self.update_text()
        self.yscrollbar=Scrollbar(self.output_frame,
                                  command=self.text.yview)
        self.yscrollbar.grid(row=0,
                             column=1,
                             sticky=N+S)
        self.text["yscrollcommand"]=self.yscrollbar.set
        self.xscrollbar=Scrollbar(self.output_frame,
                                  orient=HORIZONTAL,
                                  command=self.text.xview)
        self.xscrollbar.grid(row=1,
                             column=0,
                             sticky=E+W)
        self.text["xscrollcommand"]=self.xscrollbar.set
        self.grip=Sizegrip(self.output_frame)
        self.grip.grid(row=1,column=1)
        self.output_frame.rowconfigure(0,weight=1)
        self.output_frame.columnconfigure(0,weight=1)
        self.columnconfigure(0,weight=1)
        self.rowconfigure(3,weight=1)
        self.notebook.bind("<<NotebookTabChanged>>",self.tab_callback)

        parent.protocol("WM_DELETE_WINDOW",
                        self.on_quit)

    def tab_callback(self,event):
        # we check the ID of the active tab and ask its position
        # the order of the tabs is pretty obvious
        active_tab=self.notebook.index(self.notebook.select())
        if active_tab==0:
            self.run_tooltip.set_text("Run wmllint")
            self.run_button.configure(command=self.on_run_wmllint)
        elif active_tab==1:
            self.run_tooltip.set_text("Run wmlscope")
            self.run_button.configure(command=self.on_run_wmlscope)
        elif active_tab==2:
            self.run_tooltip.set_text("Run wmlindent")
            self.run_button.configure(command=self.on_run_wmlindent)

    def on_run_wmllint(self):
        # first of all, check if we have something to run wmllint on it
        # if not, stop here
        umc_dir=self.dir_variable.get()
        if not umc_dir and self.wmllint_tab.skip_variable.get():
            showerror("Error","""wmllint cannot run because there is no directory selected.

Please select a directory or disable the "Skip core directory" option""")
            return
        # build the command line
        wmllint_command_string=[]
        # get the path of the Python interpreter
        wmllint_command_string.append(sys.executable)
        # get the path of the desired tool (wmllint, in this case)
        wmllint_command_string.append(os.path.join(APP_DIR,"wmllint"))
        mode=self.wmllint_tab.mode_variable.get()
        if mode==0:
            pass
        elif mode==1:
            wmllint_command_string.append("--dryrun")
        elif mode==2:
            wmllint_command_string.append("--clean")
        elif mode==3:
            wmllint_command_string.append("--diff")
        elif mode==4:
            wmllint_command_string.append("--revert")
        verbosity=self.wmllint_tab.verbosity_variable.get()
        for n in range(verbosity):
            wmllint_command_string.append("-v")
        if self.wmllint_tab.stripcr_variable.get():
            wmllint_command_string.append("--stripcr")
        if self.wmllint_tab.missing_variable.get():
            wmllint_command_string.append("--missing")
        if self.wmllint_tab.known_variable.get():
            wmllint_command_string.append("--known")
        if self.wmllint_tab.spell_variable.get():
            wmllint_command_string.append("--nospellcheck")
        if self.wmllint_tab.freeze_variable.get():
            wmllint_command_string.append("--stringfreeze")
        if not self.wmllint_tab.skip_variable.get():
            wmllint_command_string.append(WESNOTH_CORE_DIR)
        if os.path.exists(umc_dir): # add-on exists
            # the realpaths are here just in case that the user
            # attempts to fool the script by feeding it a symlink
            if os.path.realpath(WESNOTH_CORE_DIR) in os.path.realpath(umc_dir):
                showwarning("Warning","""You selected the core directory or one of its subdirectories in the add-on selection box.

wmllint will be run only on the Wesnoth core directory""")
            else:
                wmllint_command_string.append(umc_dir)
        elif not umc_dir: # path does not exists because the box was left empty
            showwarning("Warning","""You didn't select a directory.

wmllint will be run only on the Wesnoth core directory""")
        else: # path doesn't exist and isn't empty
            showerror("Error","""The selected directory does not exists""")
            return # stop here
        # start thread and wmllint subprocess
        wmllint_thread=threading.Thread(target=run_tool,args=("wmllint",self.queue,wmllint_command_string))
        wmllint_thread.start()
        # build popup
        dialog=Popup(self.parent,"wmllint",wmllint_thread)

    def on_run_wmlscope(self):
        # build the command line
        wmlscope_command_string=[]
        wmlscope_command_string.append(sys.executable)
        wmlscope_command_string.append(os.path.join(APP_DIR,"wmlscope"))
        if self.wmlscope_tab.crossreference_variable.get():
            wmlscope_command_string.append("--crossreference")
        if self.wmlscope_tab.collisions_variable.get():
            wmlscope_command_string.append("--collisions")
        if self.wmlscope_tab.definitions_variable.get():
            wmlscope_command_string.append("--definitions")
        if self.wmlscope_tab.listfiles_variable.get():
            wmlscope_command_string.append("--listfiles")
        if self.wmlscope_tab.unresolved_variable.get():
            wmlscope_command_string.append("--unresolved")
        if self.wmlscope_tab.extracthelp_variable.get():
            wmlscope_command_string.append("--extracthelp")
        if self.wmlscope_tab.unchecked_variable.get():
            wmlscope_command_string.append("--unchecked")
        if self.wmlscope_tab.progress_variable.get():
            wmlscope_command_string.append("--progress")
        if self.wmlscope_tab.exclude_variable.get():
            wmlscope_command_string.append('--exclude="{0}"'.format(self.wmlscope_tab.exclude_regexp.get()))
        if self.wmlscope_tab.from_variable.get():
            wmlscope_command_string.append('--from="{0}"'.format(self.wmlscope_tab.from_regexp.get()))
        if self.wmlscope_tab.refcount_variable.get():
            try:
                wmlscope_command_string.append("--refcount=" + str(self.wmlscope_tab.refcount_number.get()))
            except ValueError as error:
                # normally it should be impossible to raise this exception
                # due to the fact that the Spinbox is read-only
                showerror("Error","""You typed an invalid value. Value must be an integer in the range 0-999""")
                return
        if self.wmlscope_tab.typelist_variable.get():
            wmlscope_command_string.append('--typelist="{0}"'.format(self.wmlscope_tab.typelist_string.get()))
        if self.wmlscope_tab.force_variable.get():
            wmlscope_command_string.append('--force-used="{0}"'.format(self.wmlscope_tab.force_regexp.get()))
        wmlscope_command_string.append(WESNOTH_CORE_DIR)
        umc_dir=self.dir_variable.get()
        if os.path.exists(umc_dir): # add-on exists
            # the realpaths are here just in case that the user
            # attempts to fool the script by feeding it a symlink
            if os.path.realpath(WESNOTH_CORE_DIR) in os.path.realpath(umc_dir):
                showwarning("Warning","""You selected the core directory or one of its subdirectories in the add-on selection box.

wmlscope will be run only on the Wesnoth core directory""")
            else:
                wmlscope_command_string.append(umc_dir)
        elif not umc_dir: # path does not exists because the box was left empty
            showwarning("Warning","""You didn't select a directory.

wmlscope will be run only on the Wesnoth core directory""")
        else: # path doesn't exist and isn't empty
            showerror("Error","""The selected directory does not exists""")
            return # stop here
        # start thread and wmlscope subprocess
        wmlscope_thread=threading.Thread(target=run_tool,args=("wmlscope",self.queue,wmlscope_command_string))
        wmlscope_thread.start()
        # build popup
        dialog=Popup(self.parent,"wmlscope",wmlscope_thread)

    def on_run_wmlindent(self):
        # build the command line
        wmlindent_command_string=[]
        wmlindent_command_string.append(sys.executable)
        wmlindent_command_string.append(os.path.join(APP_DIR,"wmlindent"))
        mode=self.wmlindent_tab.mode_variable.get()
        if mode==0:
            pass
        elif mode==1:
            wmlindent_command_string.append("--dryrun")
        verbosity=self.wmlindent_tab.verbosity_variable.get()
        for n in range(verbosity):
            wmlindent_command_string.append("-v")
        if self.wmlindent_tab.exclude_variable.get():
            wmlindent_command_string.append('--exclude="{0}"'.format(self.wmlindent_tab.regexp_variable.get()))
        if self.wmlindent_tab.quiet_variable.get():
            wmlindent_command_string.append("--quiet")
        umc_dir=self.dir_variable.get()
        if os.path.exists(umc_dir): # add-on exists
            wmlindent_command_string.append(umc_dir)
        elif not umc_dir: # path does not exists because the box was left empty
            showwarning("Warning","""You didn't select a directory.

wmlindent will be run on the Wesnoth core directory""")
            wmlindent_command_string.append(WESNOTH_CORE_DIR)
        else: # path doesn't exist and isn't empty
            showerror("Error","""The selected directory does not exists""")
            return # stop here
        # start thread and wmllint subprocess
        wmlindent_thread=threading.Thread(target=run_tool,args=("wmlindent",self.queue,wmlindent_command_string))
        wmlindent_thread.start()
        # build popup
        dialog=Popup(self.parent,"wmlindent",wmlindent_thread)

    def update_text(self):
        """Checks periodically if the queue is empty.
If it contains a string, pushes it into the Text widget.
If it contains an error in form of a tuple, displays a message and pushes the remaining output in the Text widget"""
        if not self.queue.empty():
            queue_item=self.queue.get_nowait()
            # I tried posting directly the error in the queue, but for some reason
            # isinstance(queue_item,subprocess.CalledProcessError) is ignored
            if isinstance(queue_item,tuple):
                showerror("Error","""There was an error while executing {0}.

Error code: {1}""".format(queue_item[0],queue_item[1]))
                self.text.configure(state=NORMAL)
                self.text.insert(END,queue_item[2])
                self.text.configure(state=DISABLED)
            elif isinstance(queue_item,str):
                self.text.configure(state=NORMAL)
                self.text.insert(END,queue_item)
                self.text.configure(state=DISABLED)
        self.after(100,self.update_text)
        
    def on_save(self):
        fn=asksaveasfilename(defaultextension=".txt",filetypes=[("Text file","*.txt")],initialdir=".")
        if fn:
            try:
                with codecs.open(fn,"w","utf-8") as out:
                    out.write(self.text.get(1.0,END)[:-1]) # exclude the double endline at the end
                # the output is saved, if we close we don't lose anything
                self.text.edit_modified(False)
            except IOError as error: # in case that we attempt to write without permissions
                showerror("Error","""Error while writing to:
{0}

Error code: {1}

{2}""".format(fn,error.errno,error.strerror))

    def on_clear(self):
        self.text.configure(state=NORMAL)
        self.text.delete(1.0,END)
        self.text.configure(state=DISABLED)
        # the edit_modified flag is set to True every time that the content
        # of the text widget is altered
        # since there's nothing useful inside of it, set it to False
        self.text.edit_modified(False)

    def on_about(self):
        showinfo("About Maintenance tools GUI","""© Elvish_Hunter, 2014-2015

Part of The Battle for Wesnoth project and released under the GNU GPL v2 license

Icons are taken from the Tango Desktop Project (http://tango.freedesktop.org), and are released in the Public Domain""")

    def on_quit(self):
        # check if the text widget contains something
        # and ask for a confirmation if so
        if self.text.edit_modified():
            answer = askyesno("Exit confirmation",
                              "Do you really want to quit?",
                              icon = WARNING)
            if answer:
                self.parent.destroy()
        else:
            self.parent.destroy()

root=Tk()

if is_wesnoth_tools_path(APP_DIR):
    # a dictionary with all the icons
    # they're saved in GIF format (the only one supported by Tkinter)
    # and then encoded in base64
    # this is done to avoid having small files floating around
    ICONS={
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////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////
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    ROOT_W,ROOT_H=800,480
    # the following string may be confusing, so here there's an explanation
    # Python supports two ways to perform string interpolation
    # the first one is the C-like style
    # the second one is the following, where each number enclosed in brackets points to an argument of the format method
    root.geometry("{0}x{1}+{2}+{3}".format(ROOT_W,
                                           ROOT_H,
                                           int((root.winfo_screenwidth()-ROOT_W)/2),
                                           int((root.winfo_screenheight()-ROOT_H)/2)))
    root.title("Maintenance tools GUI")
    root.rowconfigure(0,weight=1)
    root.columnconfigure(0,weight=1)
    # set the window icon
    # for now, it's just a grayscale Wesnoth icon
    # also, this line shouldn't have effect on Mac OS
    root.tk.call("wm", "iconphoto", root, "-default", ICONS["window_icon"])
    # use a better style on X11 systems instead of the Motif-like one
    style=Style()
    if root.tk.call('tk', 'windowingsystem') == "x11" and "clam" in style.theme_names():
        style.theme_use("clam")
    app=MainFrame(root)
    root.mainloop()
    sys.exit(0)
else:
    root.withdraw() # avoid showing a blank Tk window
    showerror("Error","This application must be placed into the wesnoth/data/tools directory")
    sys.exit(1)