Lib/plat-mac/EasyDialogs.py

"""Easy to use dialogs.

Message(msg) -- display a message and an OK button.
AskString(prompt, default) -- ask for a string, display OK and Cancel buttons.
AskPassword(prompt, default) -- like AskString(), but shows text as bullets.
AskYesNoCancel(question, default) -- display a question and Yes, No and Cancel buttons.
bar = Progress(label, maxvalue) -- Display a progress bar
bar.set(value) -- Set value
bar.inc( *amount ) -- increment value by amount (default=1)
bar.label( *newlabel ) -- get or set text label. 

More documentation in each function.
This module uses DLOG resources 260 and on.
Based upon STDWIN dialogs with the same names and functions.
"""

from Carbon.Dlg import GetNewDialog, SetDialogItemText, GetDialogItemText, ModalDialog
from Carbon import Qd
from Carbon import QuickDraw
from Carbon import Dialogs
from Carbon import Windows
from Carbon import Dlg,Win,Evt,Events # sdm7g
from Carbon import Ctl
from Carbon import Controls
from Carbon import Menu
import Nav
import MacOS
import string
from Carbon.ControlAccessor import *	# Also import Controls constants
import Carbon.File
import macresource
import os

_initialized = 0

def _initialize():
	global _initialized
	if _initialized: return
	macresource.need("DLOG", 260, "dialogs.rsrc", __name__)


def cr2lf(text):
	if '\r' in text:
		text = string.join(string.split(text, '\r'), '\n')
	return text

def lf2cr(text):
	if '\n' in text:
		text = string.join(string.split(text, '\n'), '\r')
	if len(text) > 253:
		text = text[:253] + '\311'
	return text

def Message(msg, id=260, ok=None):
	"""Display a MESSAGE string.
	
	Return when the user clicks the OK button or presses Return.
	
	The MESSAGE string can be at most 255 characters long.
	"""
	_initialize()
	d = GetNewDialog(id, -1)
	if not d:
		print "EasyDialogs: Can't get DLOG resource with id =", id, " (missing resource file?)"
		return
	h = d.GetDialogItemAsControl(2)
	SetDialogItemText(h, lf2cr(msg))
	if ok != None:
		h = d.GetDialogItemAsControl(1)
		h.SetControlTitle(ok)
	d.SetDialogDefaultItem(1)
	d.AutoSizeDialog()
	d.GetDialogWindow().ShowWindow()
	while 1:
		n = ModalDialog(None)
		if n == 1:
			return


def AskString(prompt, default = "", id=261, ok=None, cancel=None):
	"""Display a PROMPT string and a text entry field with a DEFAULT string.
	
	Return the contents of the text entry field when the user clicks the
	OK button or presses Return.
	Return None when the user clicks the Cancel button.
	
	If omitted, DEFAULT is empty.
	
	The PROMPT and DEFAULT strings, as well as the return value,
	can be at most 255 characters long.
	"""
	
	_initialize()
	d = GetNewDialog(id, -1)
	if not d:
		print "EasyDialogs: Can't get DLOG resource with id =", id, " (missing resource file?)"
		return
	h = d.GetDialogItemAsControl(3)
	SetDialogItemText(h, lf2cr(prompt))
	h = d.GetDialogItemAsControl(4)
	SetDialogItemText(h, lf2cr(default))
	d.SelectDialogItemText(4, 0, 999)
#	d.SetDialogItem(4, 0, 255)
	if ok != None:
		h = d.GetDialogItemAsControl(1)
		h.SetControlTitle(ok)
	if cancel != None:
		h = d.GetDialogItemAsControl(2)
		h.SetControlTitle(cancel)
	d.SetDialogDefaultItem(1)
	d.SetDialogCancelItem(2)
	d.AutoSizeDialog()
	d.GetDialogWindow().ShowWindow()
	while 1:
		n = ModalDialog(None)
		if n == 1:
			h = d.GetDialogItemAsControl(4)
			return cr2lf(GetDialogItemText(h))
		if n == 2: return None

def AskPassword(prompt,	 default='', id=264, ok=None, cancel=None):	
	"""Display a PROMPT string and a text entry field with a DEFAULT string.
	The string is displayed as bullets only.
	
	Return the contents of the text entry field when the user clicks the
	OK button or presses Return.
	Return None when the user clicks the Cancel button.
	
	If omitted, DEFAULT is empty.
	
	The PROMPT and DEFAULT strings, as well as the return value,
	can be at most 255 characters long.
	"""
	_initialize()
	d = GetNewDialog(id, -1)
	if not d:
		print "EasyDialogs: Can't get DLOG resource with id =", id, " (missing resource file?)"
		return
	h = d.GetDialogItemAsControl(3)
	SetDialogItemText(h, lf2cr(prompt))	
	pwd = d.GetDialogItemAsControl(4)
	bullets = '\245'*len(default)
##	SetControlData(pwd, kControlEditTextPart, kControlEditTextTextTag, bullets)
	SetControlData(pwd, kControlEditTextPart, kControlEditTextPasswordTag, default)
	d.SelectDialogItemText(4, 0, 999)
	Ctl.SetKeyboardFocus(d.GetDialogWindow(), pwd, kControlEditTextPart)
	if ok != None:
		h = d.GetDialogItemAsControl(1)
		h.SetControlTitle(ok)
	if cancel != None:
		h = d.GetDialogItemAsControl(2)
		h.SetControlTitle(cancel)
	d.SetDialogDefaultItem(Dialogs.ok)
	d.SetDialogCancelItem(Dialogs.cancel)
	d.AutoSizeDialog()
	d.GetDialogWindow().ShowWindow()
	while 1:
		n = ModalDialog(None)
		if n == 1:
			h = d.GetDialogItemAsControl(4)
			return cr2lf(GetControlData(pwd, kControlEditTextPart, kControlEditTextPasswordTag))
		if n == 2: return None

def AskYesNoCancel(question, default = 0, yes=None, no=None, cancel=None, id=262):
	"""Display a QUESTION string which can be answered with Yes or No.
	
	Return 1 when the user clicks the Yes button.
	Return 0 when the user clicks the No button.
	Return -1 when the user clicks the Cancel button.
	
	When the user presses Return, the DEFAULT value is returned.
	If omitted, this is 0 (No).
	
	The QUESTION string can be at most 255 characters.
	"""
	
	_initialize()
	d = GetNewDialog(id, -1)
	if not d:
		print "EasyDialogs: Can't get DLOG resource with id =", id, " (missing resource file?)"
		return
	# Button assignments:
	# 1 = default (invisible)
	# 2 = Yes
	# 3 = No
	# 4 = Cancel
	# The question string is item 5
	h = d.GetDialogItemAsControl(5)
	SetDialogItemText(h, lf2cr(question))
	if yes != None:
		if yes == '':
			d.HideDialogItem(2)
		else:
			h = d.GetDialogItemAsControl(2)
			h.SetControlTitle(yes)
	if no != None:
		if no == '':
			d.HideDialogItem(3)
		else:
			h = d.GetDialogItemAsControl(3)
			h.SetControlTitle(no)
	if cancel != None:
		if cancel == '':
			d.HideDialogItem(4)
		else:
			h = d.GetDialogItemAsControl(4)
			h.SetControlTitle(cancel)
	d.SetDialogCancelItem(4)
	if default == 1:
		d.SetDialogDefaultItem(2)
	elif default == 0:
		d.SetDialogDefaultItem(3)
	elif default == -1:
		d.SetDialogDefaultItem(4)
	d.AutoSizeDialog()
	d.GetDialogWindow().ShowWindow()
	while 1:
		n = ModalDialog(None)
		if n == 1: return default
		if n == 2: return 1
		if n == 3: return 0
		if n == 4: return -1


		

screenbounds = Qd.GetQDGlobalsScreenBits().bounds
screenbounds = screenbounds[0]+4, screenbounds[1]+4, \
	screenbounds[2]-4, screenbounds[3]-4

kControlProgressBarIndeterminateTag = 'inde'	# from Controls.py


class ProgressBar:
	def __init__(self, title="Working...", maxval=0, label="", id=263):
		self.w = None
		self.d = None
		_initialize()
		self.d = GetNewDialog(id, -1)
		self.w = self.d.GetDialogWindow()
		self.label(label)
		self.title(title)
		self.set(0, maxval)
		self.d.AutoSizeDialog()
		self.w.ShowWindow()
		self.d.DrawDialog()

	def __del__( self ):
		if self.w:
			self.w.BringToFront()
			self.w.HideWindow()
		del self.w
		del self.d
		
	def title(self, newstr=""):
		"""title(text) - Set title of progress window"""
		self.w.BringToFront()
		self.w.SetWTitle(newstr)
		
	def label( self, *newstr ):
		"""label(text) - Set text in progress box"""
		self.w.BringToFront()
		if newstr:
			self._label = lf2cr(newstr[0])
		text_h = self.d.GetDialogItemAsControl(2)
		SetDialogItemText(text_h, self._label)

	def _update(self, value):
		maxval = self.maxval
		if maxval == 0:		# an indeterminate bar
			Ctl.IdleControls(self.w)	# spin the barber pole
		else:				# a determinate bar
			if maxval > 32767:
				value = int(value/(maxval/32767.0))
				maxval = 32767
			progbar = self.d.GetDialogItemAsControl(3)
			progbar.SetControlMaximum(maxval)
			progbar.SetControlValue(value)	# set the bar length

		# Test for cancel button
		ready, ev = Evt.WaitNextEvent( Events.mDownMask, 1  )
		if ready :
			what,msg,when,where,mod = ev
			part = Win.FindWindow(where)[0]
			if Dlg.IsDialogEvent(ev):
				ds = Dlg.DialogSelect(ev)
				if ds[0] and ds[1] == self.d and ds[-1] == 1:
					self.w.HideWindow()
					self.w = None
					self.d = None
					raise KeyboardInterrupt, ev
			else:
				if part == 4:	# inDrag 
					self.w.DragWindow(where, screenbounds)
				else:
					MacOS.HandleEvent(ev) 
			
			
	def set(self, value, max=None):
		"""set(value) - Set progress bar position"""
		if max != None:
			self.maxval = max
			bar = self.d.GetDialogItemAsControl(3)
			if max <= 0:	# indeterminate bar
				bar.SetControlData(0,kControlProgressBarIndeterminateTag,'\x01')
			else:			# determinate bar
				bar.SetControlData(0,kControlProgressBarIndeterminateTag,'\x00')
		if value < 0:
			value = 0
		elif value > self.maxval:
			value = self.maxval
		self.curval = value
		self._update(value)

	def inc(self, n=1):
		"""inc(amt) - Increment progress bar position"""
		self.set(self.curval + n)

ARGV_ID=265
ARGV_ITEM_OK=1
ARGV_ITEM_CANCEL=2
ARGV_OPTION_GROUP=3
ARGV_OPTION_EXPLAIN=4
ARGV_OPTION_VALUE=5
ARGV_OPTION_ADD=6
ARGV_COMMAND_GROUP=7
ARGV_COMMAND_EXPLAIN=8
ARGV_COMMAND_ADD=9
ARGV_ADD_OLDFILE=10
ARGV_ADD_NEWFILE=11
ARGV_ADD_FOLDER=12
ARGV_CMDLINE_GROUP=13
ARGV_CMDLINE_DATA=14

##def _myModalDialog(d):
##	while 1:
##		ready, ev = Evt.WaitNextEvent(0xffff, -1)
##		print 'DBG: WNE', ready, ev
##		if ready : 
##			what,msg,when,where,mod = ev
##			part, window = Win.FindWindow(where)
##			if Dlg.IsDialogEvent(ev):
##				didit, dlgdone, itemdone = Dlg.DialogSelect(ev)
##				print 'DBG: DialogSelect', didit, dlgdone, itemdone, d
##				if didit and dlgdone == d:
##					return itemdone
##			elif window == d.GetDialogWindow():
##				d.GetDialogWindow().SelectWindow()
##				if part == 4:	# inDrag 
##						d.DragWindow(where, screenbounds)
##				else:
##					MacOS.HandleEvent(ev) 
##			else:
##				MacOS.HandleEvent(ev) 
##
def _setmenu(control, items):
		mhandle = control.GetControlData_Handle(Controls.kControlMenuPart,
				Controls.kControlPopupButtonMenuHandleTag)
		menu = Menu.as_Menu(mhandle)
		for item in items:
			if type(item) == type(()):
				label = item[0]
			else:
				label = item
			if label[-1] == '=' or label[-1] == ':':
				label = label[:-1]
			menu.AppendMenu(label)
##		mhandle, mid = menu.getpopupinfo()
##		control.SetControlData_Handle(Controls.kControlMenuPart,
##				Controls.kControlPopupButtonMenuHandleTag, mhandle)
		control.SetControlMinimum(1)
		control.SetControlMaximum(len(items)+1)
		
def _selectoption(d, optionlist, idx):
	if idx < 0 or idx >= len(optionlist):
		MacOS.SysBeep()
		return
	option = optionlist[idx]
	if type(option) == type(()):
		if len(option) == 4:
			help = option[2]
		elif len(option) > 1:
			help = option[-1]
		else:
			help = ''
	else:
		help = ''
	h = d.GetDialogItemAsControl(ARGV_OPTION_EXPLAIN)
	if help and len(help) > 250:
		help = help[:250] + '...'
	Dlg.SetDialogItemText(h, help)
	hasvalue = 0
	if type(option) == type(()):
		label = option[0]
	else:
		label = option
	if label[-1] == '=' or label[-1] == ':':
		hasvalue = 1
	h = d.GetDialogItemAsControl(ARGV_OPTION_VALUE)
	Dlg.SetDialogItemText(h, '')
	if hasvalue:
		d.ShowDialogItem(ARGV_OPTION_VALUE)
		d.SelectDialogItemText(ARGV_OPTION_VALUE, 0, 0)
	else:
		d.HideDialogItem(ARGV_OPTION_VALUE)


def GetArgv(optionlist=None, commandlist=None, addoldfile=1, addnewfile=1, addfolder=1, id=ARGV_ID):
	_initialize()
	d = GetNewDialog(id, -1)
	if not d:
		print "EasyDialogs: Can't get DLOG resource with id =", id, " (missing resource file?)"
		return
#	h = d.GetDialogItemAsControl(3)
#	SetDialogItemText(h, lf2cr(prompt))
#	h = d.GetDialogItemAsControl(4)
#	SetDialogItemText(h, lf2cr(default))
#	d.SelectDialogItemText(4, 0, 999)
#	d.SetDialogItem(4, 0, 255)
	if optionlist:
		_setmenu(d.GetDialogItemAsControl(ARGV_OPTION_GROUP), optionlist)
		_selectoption(d, optionlist, 0)
	else:
		d.GetDialogItemAsControl(ARGV_OPTION_GROUP).DeactivateControl()
	if commandlist:
		_setmenu(d.GetDialogItemAsControl(ARGV_COMMAND_GROUP), commandlist)
		if type(commandlist[0]) == type(()) and len(commandlist[0]) > 1:
			help = commandlist[0][-1]
			h = d.GetDialogItemAsControl(ARGV_COMMAND_EXPLAIN)
			Dlg.SetDialogItemText(h, help)
	else:
		d.GetDialogItemAsControl(ARGV_COMMAND_GROUP).DeactivateControl()
	if not addoldfile:
		d.GetDialogItemAsControl(ARGV_ADD_OLDFILE).DeactivateControl()
	if not addnewfile:
		d.GetDialogItemAsControl(ARGV_ADD_NEWFILE).DeactivateControl()
	if not addfolder:
		d.GetDialogItemAsControl(ARGV_ADD_FOLDER).DeactivateControl()
	d.SetDialogDefaultItem(ARGV_ITEM_OK)
	d.SetDialogCancelItem(ARGV_ITEM_CANCEL)
	d.GetDialogWindow().ShowWindow()
	d.DrawDialog()
	if hasattr(MacOS, 'SchedParams'):
		appsw = MacOS.SchedParams(1, 0)
	try:
		while 1:
			stringstoadd = []
			n = ModalDialog(None)
			if n == ARGV_ITEM_OK:
				break
			elif n == ARGV_ITEM_CANCEL:
				raise SystemExit
			elif n == ARGV_OPTION_GROUP:
				idx = d.GetDialogItemAsControl(ARGV_OPTION_GROUP).GetControlValue()-1
				_selectoption(d, optionlist, idx)
			elif n == ARGV_OPTION_VALUE:
				pass
			elif n == ARGV_OPTION_ADD:
				idx = d.GetDialogItemAsControl(ARGV_OPTION_GROUP).GetControlValue()-1
				if 0 <= idx < len(optionlist):
					option = optionlist[idx]
					if type(option) == type(()):
						option = option[0]
					if option[-1] == '=' or option[-1] == ':':
						option = option[:-1]
						h = d.GetDialogItemAsControl(ARGV_OPTION_VALUE)
						value = Dlg.GetDialogItemText(h)
					else:
						value = ''
					if len(option) == 1:
						stringtoadd = '-' + option
					else:
						stringtoadd = '--' + option
					stringstoadd = [stringtoadd]
					if value:
						stringstoadd.append(value)
				else:
					MacOS.SysBeep()
			elif n == ARGV_COMMAND_GROUP:
				idx = d.GetDialogItemAsControl(ARGV_COMMAND_GROUP).GetControlValue()-1
				if 0 <= idx < len(commandlist) and type(commandlist[idx]) == type(()) and \
						len(commandlist[idx]) > 1:
					help = commandlist[idx][-1]
					h = d.GetDialogItemAsControl(ARGV_COMMAND_EXPLAIN)
					Dlg.SetDialogItemText(h, help)
			elif n == ARGV_COMMAND_ADD:
				idx = d.GetDialogItemAsControl(ARGV_COMMAND_GROUP).GetControlValue()-1
				if 0 <= idx < len(commandlist):
					command = commandlist[idx]
					if type(command) == type(()):
						command = command[0]
					stringstoadd = [command]
				else:
					MacOS.SysBeep()
			elif n == ARGV_ADD_OLDFILE:
				pathname = AskFileForOpen()
				if pathname:
					stringstoadd = [pathname]
			elif n == ARGV_ADD_NEWFILE:
				pathname = AskFileForSave()
				if pathname:
					stringstoadd = [pathname]
			elif n == ARGV_ADD_FOLDER:
				pathname = AskFolder()
				if pathname:
					stringstoadd = [pathname]
			elif n == ARGV_CMDLINE_DATA:
				pass # Nothing to do
			else:
				raise RuntimeError, "Unknown dialog item %d"%n
			
			for stringtoadd in stringstoadd:
				if '"' in stringtoadd or "'" in stringtoadd or " " in stringtoadd:
					stringtoadd = `stringtoadd`
				h = d.GetDialogItemAsControl(ARGV_CMDLINE_DATA)
				oldstr = GetDialogItemText(h)
				if oldstr and oldstr[-1] != ' ':
					oldstr = oldstr + ' '
				oldstr = oldstr + stringtoadd
				if oldstr[-1] != ' ':
					oldstr = oldstr + ' '
				SetDialogItemText(h, oldstr)
				d.SelectDialogItemText(ARGV_CMDLINE_DATA, 0x7fff, 0x7fff)
		h = d.GetDialogItemAsControl(ARGV_CMDLINE_DATA)
		oldstr = GetDialogItemText(h)
		tmplist = string.split(oldstr)
		newlist = []
		while tmplist:
			item = tmplist[0]
			del tmplist[0]
			if item[0] == '"':
				while item[-1] != '"':
					if not tmplist:
						raise RuntimeError, "Unterminated quoted argument"
					item = item + ' ' + tmplist[0]
					del tmplist[0]
				item = item[1:-1]
			if item[0] == "'":
				while item[-1] != "'":
					if not tmplist:
						raise RuntimeError, "Unterminated quoted argument"
					item = item + ' ' + tmplist[0]
					del tmplist[0]
				item = item[1:-1]
			newlist.append(item)
		return newlist
	finally:
		if hasattr(MacOS, 'SchedParams'):
			apply(MacOS.SchedParams, appsw)
		del d

def _mktypelist(typelist):
	# Workaround for OSX typeless files:
	if 'TEXT' in typelist and not '\0\0\0\0' in typelist:
		typelist = typelist + ('\0\0\0\0',)
	if not typelist:
		return None
	data = 'Pyth' + struct.pack("hh", 0, len(typelist))
	for type in typelist:
		data = data+type
	return Carbon.Res.Handle(data)
	
_ALLOWED_KEYS = {
	'version':1,
	'defaultLocation':1,
	'dialogOptionFlags':1,
	'location':1,
	'clientName':1,
	'windowTitle':1,
	'actionButtonLabel':1,
	'cancelButtonLabel':1,
	'savedFileName':1,
	'message':1,
	'preferenceKey':1,
	'popupExtension':1,
	'eventProc':1,
	'previewProc':1,
	'filterProc':1,
	'typeList':1,
	'fileType':1,
	'fileCreator':1,
	# Our extension:
	'wanted':1,
	'multiple':1,
}

def _process_Nav_args(argsargs, allowed, dftflags):
	import aepack
	import Carbon.AE
	import Carbon.File
	args = argsargs.copy()
	for k in args.keys():
		if not allowed.has_key(k):
			raise TypeError, "Unknown keyword argument: %s" % repr(k)
	# Set some defaults, and modify some arguments
	if not args.has_key('dialogOptionFlags'):
		args['dialogOptionFlags'] = dftflags
	if args.has_key('defaultLocation') and \
			not isinstance(args['defaultLocation'], Carbon.AE.AEDesc):
		defaultLocation = args['defaultLocation']
		if isinstance(defaultLocation, (Carbon.File.FSSpec, Carbon.File.FSRef)):
			args['defaultLocation'] = aepack.pack(defaultLocation)
		else:
			defaultLocation = Carbon.File.FSRef(defaultLocation)
			args['defaultLocation'] = aepack.pack(defaultLocation)
	if args.has_key('typeList') and not isinstance(args['typeList'], Carbon.Res.ResourceType):
		typeList = args['typeList'].copy()
		# Workaround for OSX typeless files:
		if 'TEXT' in typeList and not '\0\0\0\0' in typeList:
			typeList = typeList + ('\0\0\0\0',)
		data = 'Pyth' + struct.pack("hh", 0, len(typeList))
		for type in typeList:
			data = data+type
		args['typeList'] = Carbon.Res.Handle(data)
	tpwanted = str
	if args.has_key('wanted'):
		tpwanted = args['wanted']
		del args['wanted']
	return args, tpwanted
	
def AskFileForOpen(**args):
	default_flags = 0x56 # Or 0xe4?
	args, tpwanted = _process_Nav_args(args, _ALLOWED_KEYS, default_flags) 
	try:
		rr = Nav.NavChooseFile(args)
		good = 1
	except Nav.error, arg:
		if arg[0] != -128: # userCancelledErr
			raise Nav.error, arg
		return None
	if not rr.validRecord or not rr.selection:
		return None
	if issubclass(tpwanted, Carbon.File.FSRef):
		return tpwanted(rr.selection_fsr[0])
	if issubclass(tpwanted, Carbon.File.FSSpec):
		return tpwanted(rr.selection[0])
	if issubclass(tpwanted, str):
		return tpwanted(rr.selection_fsr[0].FSRefMakePath())
	if issubclass(tpwanted, unicode):
		return tpwanted(rr.selection_fsr[0].FSRefMakePath(), 'utf8')
	raise TypeError, "Unknown value for argument 'wanted': %s" % repr(tpwanted)

def AskFileForSave(**args):
	default_flags = 0x07
	args, tpwanted = _process_Nav_args(args, _ALLOWED_KEYS, default_flags) 
	try:
		rr = Nav.NavPutFile(args)
		good = 1
	except Nav.error, arg:
		if arg[0] != -128: # userCancelledErr
			raise Nav.error, arg
		return None
	if not rr.validRecord or not rr.selection:
		return None
	if issubclass(tpwanted, Carbon.File.FSRef):
		raise TypeError, "Cannot pass wanted=FSRef to AskFileForSave"
	if issubclass(tpwanted, Carbon.File.FSSpec):
		return tpwanted(rr.selection[0])
	if issubclass(tpwanted, (str, unicode)):
		# This is gross, and probably incorrect too
		vrefnum, dirid, name = rr.selection[0].as_tuple()
		pardir_fss = Carbon.File.FSSpec((vrefnum, dirid, ''))
		pardir_fsr = Carbon.File.FSRef(pardir_fss)
		pardir_path = pardir_fsr.FSRefMakePath()  # This is utf-8
		name_utf8 = unicode(name, 'macroman').encode('utf8')
		fullpath = os.path.join(pardir_path, name_utf8)
		if issubclass(tpwanted, unicode):
			return unicode(fullpath, 'utf8')
		return tpwanted(fullpath)
	raise TypeError, "Unknown value for argument 'wanted': %s" % repr(tpwanted)
		
def AskFolder(**args):
	default_flags = 0x17
	args, tpwanted = _process_Nav_args(args, _ALLOWED_KEYS, default_flags) 
	try:
		rr = Nav.NavChooseFolder(args)
		good = 1
	except Nav.error, arg:
		if arg[0] != -128: # userCancelledErr
			raise Nav.error, arg
		return None
	if not rr.validRecord or not rr.selection:
		return None
	if issubclass(tpwanted, Carbon.File.FSRef):
		return tpwanted(rr.selection_fsr[0])
	if issubclass(tpwanted, Carbon.File.FSSpec):
		return tpwanted(rr.selection[0])
	if issubclass(tpwanted, str):
		return tpwanted(rr.selection_fsr[0].FSRefMakePath())
	if issubclass(tpwanted, unicode):
		return tpwanted(rr.selection_fsr[0].FSRefMakePath(), 'utf8')
	raise TypeError, "Unknown value for argument 'wanted': %s" % repr(tpwanted)
	

def test():
	import time, sys, macfs

	Message("Testing EasyDialogs.")
	optionlist = (('v', 'Verbose'), ('verbose', 'Verbose as long option'), 
				('flags=', 'Valued option'), ('f:', 'Short valued option'))
	commandlist = (('start', 'Start something'), ('stop', 'Stop something'))
	argv = GetArgv(optionlist=optionlist, commandlist=commandlist, addoldfile=0)
	Message("Command line: %s"%' '.join(argv))
	for i in range(len(argv)):
		print 'arg[%d] = %s'%(i, `argv[i]`)
	ok = AskYesNoCancel("Do you want to proceed?")
	ok = AskYesNoCancel("Do you want to identify?", yes="Identify", no="No")
	if ok > 0:
		s = AskString("Enter your first name", "Joe")
		s2 = AskPassword("Okay %s, tell us your nickname"%s, s, cancel="None")
		if not s2:
			Message("%s has no secret nickname"%s)
		else:
			Message("Hello everybody!!\nThe secret nickname of %s is %s!!!"%(s, s2))
	else:
		s = 'Anonymous'
	rv = AskFileForOpen(message="Gimme a file, %s"%s, wanted=macfs.FSSpec)
	Message("rv: %s"%rv)
	rv = AskFileForSave(wanted=macfs.FSSpec, savedFileName="%s.txt"%s)
	Message("rv.as_pathname: %s"%rv.as_pathname())
	rv = AskFolder()
	Message("Folder name: %s"%rv)
	text = ( "Working Hard...", "Hardly Working..." ,
			"So far, so good!", "Keep on truckin'" )
	bar = ProgressBar("Progress, progress...", 0, label="Ramping up...")
	try:
		if hasattr(MacOS, 'SchedParams'):
			appsw = MacOS.SchedParams(1, 0)
		for i in xrange(20):
			bar.inc()
			time.sleep(0.05)
		bar.set(0,100)
		for i in xrange(100):
			bar.set(i)
			time.sleep(0.05)
			if i % 10 == 0:
				bar.label(text[(i/10) % 4])
		bar.label("Done.")
		time.sleep(1.0) 	# give'em a chance to see "Done."
	finally:
		del bar
		if hasattr(MacOS, 'SchedParams'):
			apply(MacOS.SchedParams, appsw)

if __name__ == '__main__':
	try:
		test()
	except KeyboardInterrupt:
		Message("Operation Canceled.")