"""GNUmed pregnancy related dates widgets.
"""
#====================================================================
__author__ = "M. Bonert, R. Terry, I. Haywood, K.Hilbert"
__licence__ = "GPL v2 or later"


import sys
import datetime as pydt


import wx


from Gnumed.pycommon import gmDateTime
from Gnumed.pycommon import gmTools
from Gnumed.business import gmClinicalCalculator
from Gnumed.wxpython import gmGuiHelpers

#====================================================================
def calculate_edc(parent=None, patient=None):

	if parent is None:
		parent = wx.GetApp().GetTopWindow()

	dlg = cEdcCalculatorDlg(parent, -1)
	prev_edc = None
	if patient.connected:
		prev_edc = patient.emr.EDC
		dlg.patient = patient
		dlg.EDC = prev_edc
	action = dlg.ShowModal()
	new_edc = dlg.EDC
	dlg.DestroyLater()

	# cancelled ?
	if action != wx.ID_SAVE:
		return

	# but have we got a patient ?
	if not patient.connected:
		return

	# ignore setting EDC from NULL to NULL
	if (new_edc is None) and (prev_edc is None):
		return

	# setting from X to NULL -> is a deletion intended ?
	# (prev_edc MUST be not None due to the previous condition)
	if new_edc is None:
		delete_edc = gmGuiHelpers.gm_show_question (
			title = _('Editing EDC'),
			question = _(
				'Really delete the EDC documented previously ?\n'
				'\n'
				' EDC: %s'
			) % gmDateTime.pydt_strftime(prev_edc, '%Y %b %d'),
			cancel_button = False
		)
		if not delete_edc:
			return

	patient.emr.EDC = new_edc

#====================================================================
from Gnumed.wxGladeWidgets import wxgEdcCalculatorDlg

class cEdcCalculatorDlg(wxgEdcCalculatorDlg.wxgEdcCalculatorDlg):

	def __init__(self, *args, **kwds):
		wxgEdcCalculatorDlg.wxgEdcCalculatorDlg.__init__(self, *args, **kwds)
		self.__calc = gmClinicalCalculator.cClinicalCalculator()
		self.__init_ui()
	#----------------------------------------------------------------
	def __init_ui(self):
		edc = self.__calc.get_EDC(lmp = None, nullipara = self._CHBOX_first_pregnancy.GetValue())
		txt = _(
			'Algorithm: %s\n'
			'\n'
			'Source: %s'
		) % (
			edc.formula_name,
			edc.formula_source
		)
		self._TCTRL_algo.SetValue(txt)
		self._PRW_lmp.add_callback_on_selection(self._on_lmp_selected)
		self._PRW_edc.add_callback_on_modified(self._on_edc_modified)

		self._PRW_lmp.SetFocus()
	#----------------------------------------------------------------
	def _on_lmp_selected(self, data):
		self.__recalculate()
	#----------------------------------------------------------------
	def _on_edc_modified(self):
		self._PRW_lmp.SetData(None)
		self._TCTRL_details.SetValue('')
	#----------------------------------------------------------------
	def _on_first_pregnancy_toggled(self, event):
		event.Skip()
		self.__recalculate()
	#----------------------------------------------------------------
	def _on_lmp_picked_in_calendar(self, event):
		event.Skip()
		self._PRW_lmp.SetData(gmDateTime.wxDate2py_dt(wxDate = self._CALCTRL.Date))
		self.__recalculate()
	#----------------------------------------------------------------
	def _on_save_button_pressed(self, event):
		event.Skip()
		if self.__calc.patient is None:
			return False
		if self._PRW_edc.is_valid_timestamp(empty_is_valid = True):
			self.EndModal(wx.ID_SAVE)
			return True
		return False
	#----------------------------------------------------------------
	def __recalculate(self):
		lmp = self._PRW_lmp.date
		if lmp is None:
			self._PRW_edc.SetData(None)
			self._TCTRL_details.SetValue('')
			return

		edc = self.__calc.get_EDC(lmp = lmp, nullipara = self._CHBOX_first_pregnancy.GetValue())

		self._PRW_edc.SetData(edc.numeric_value)
		details = ''
		now = gmDateTime.pydt_now_here()
		# Beulah Hunter, 375 days (http://www.reference.com/motif/health/longest-human-pregnancy-on-record)
		if (lmp < now) and (edc.numeric_value > (now + pydt.timedelta(days = 380))):
			age = now - lmp
			weeks, days = divmod(age.days, 7)
			week = weeks
			if days > 0:
				week = weeks + 1
			month, tmp = divmod(age.days, 28)
			if days > 0:
				month += 1
			details += _(
				'Current age of pregnancy (%s):\n'
				' day %s = %s weeks %s days = week %s = month %s\n\n'
			) % (
				gmDateTime.pydt_strftime(now, '%Y %b %d'),
				age.days,
				int(weeks),
				int(days),
				week,
				month
			)

		details += edc.format (
			left_margin = 1,
			width = 50,
			with_formula = False,
			with_warnings = True,
			with_variables = True,
			with_sub_results = True,
			return_list = False
		)
		self._TCTRL_details.SetValue(details)
	#----------------------------------------------------------------
	# properties
	#----------------------------------------------------------------
	def _get_EDC(self):
		return self._PRW_edc.date

	def _set_EDC(self, edc):
		self._PRW_edc.SetData(edc)
		self._PRW_lmp.SetData(None)
		self._TCTRL_details.SetValue('')

	EDC = property(_get_EDC, _set_EDC)
	#----------------------------------------------------------------
	def _set_patient(self, patient):
		self.__calc.patient = patient

	patient = property(lambda x:x, _set_patient)

#====================================================================
#====================================================================
# old code
#====================================================================
#====================================================================
#====================================================================
import math, zlib, random, string, os.path


import wx.lib.rcsizer

"""
Calculates from LMP:
 - EDC
 - 18th week ultrasound scan

Naegele's rule is easy for manual calculation, but a pain to code
Enter Haywood's rule ;-), human gestation is defined as 24192000 seconds.
(Ian, can you please explain a bit more ?)

TODO:
ideally, tool should query backend for parity, race, etc. for exact measurement
"""


LMP_FIELD = 0
US_FIELD = 1

ID_LMP = wx.NewId()
ID_DUE = wx.NewId()
ID_DAY = wx.NewId()
ID_WEEK = wx.NewId()
ID_MENU = wx.NewId()

GESTATION = 24192000
WEEK = 604800
DAY = 86400
US18_52 = 10886400	# 18 weeks in seconds (for 18/52 Ultrasound)

#====================================================================
class cPregCalcFrame (wx.Frame):
	"""
	The new pregnancy calculator.
	"""

	#TODO
	# IMPROVE removal of time from txt_lmp, txtedc, txtdue (?)
	#	see: def PurgeTime(self, date):
	#
	# explore idea of 'status bar' across bottom -- something to make
	# 	clear how to use the calculator
	#
	# change the set-up of the RowColSizer(), shrink the size of the 'Weeks' & 'Days' fields
	#	make column on right side of preg. calc. more compact
	#
	# clean-up the names of the variables (some could be named more descriptively)
	#
	# add ability to type in LMP and Scan Date with keyboard (as opposed to only clicking on calendar)
	#	make movement between fields possible with 'tab' & 'enter'

	def __init__ (self, parent):
		myStyle = wx.MINIMIZE_BOX | wx.CAPTION | wx.ALIGN_CENTER | \
			wx.ALIGN_CENTER_VERTICAL | wx.TAB_TRAVERSAL | wx.STAY_ON_TOP
		wx.Frame.__init__(self, parent, -1, _("Pregnancy Calculator"), style=myStyle)

		# initialization of variables used in the control & calculation
		self.xfer_cal_date_to=LMP_FIELD	# controls which variable (LMP or Ultrasound) a calendar event changes
					# (if == 0): {calendar selection modifies LMP}
					# (if == 1): {calendar selection modifies Ultrasound Date}

		self.ustxt=wx.DateTime_Today()	# avoids problem - one would have if the user clicked on
						# ultrasound date
						# BONUS: makes the preg. calculator useful for EDC calcs given
						# 	a date and the gestation time

		# get icon
		if __name__ == '__main__':
			png_fname = os.path.join('..', 'bitmaps', 'preg_calculator.png')
		else:
			from Gnumed.pycommon import gmGuiBroker
			gb = gmGuiBroker.GuiBroker()
			png_fname = os.path.join(gb['gnumed_dir'], 'bitmaps', 'preg_calculator.png')
		icon = wx.Icon()
		icon.LoadFile(png_fname, wx.BITMAP_TYPE_PNG)
		self.SetIcon(icon)

		szr_rc = wx.lib.rcsizer.RowColSizer()

		#------------------------------
		# sizer holding the 'LMP' stuff
		#------------------------------
		label = wx.StaticText(self,-1,_("LMP"),size = (50,20))	#label Lmp
		label.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		label.SetForegroundColour(wx.Colour(0,0,0))

		self.txt_lmp = wx.TextCtrl(self,-1,"",size=(100,20))  	# text for lmp
		self.txt_lmp.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		self.txt_lmp.SetToolTip(wx.ToolTip(_("Click on calendar to enter the last menstrual period date")))
		tiplmp=self.txt_lmp.GetToolTip()

		szr_row1 = wx.BoxSizer(wx.HORIZONTAL)
		szr_row1.Add(self.txt_lmp,1,wx.EXPAND|wx.ALL,2)
		wx.EVT_SET_FOCUS(self.txt_lmp, self.OnSetFocus_lmp)

		szr_lmp = wx.BoxSizer(wx.HORIZONTAL)
		szr_lmp.Add(label, 1, 0, 0)
		szr_lmp.Add((10,1),0,0)
		szr_rc.Add(szr_lmp, flag=wx.EXPAND, row=0, col=1)
		szr_rc.Add(szr_row1, flag=wx.EXPAND, row=0, col=2, colspan=5)
		#------------------------------
		# sizer holding the 'Gest.' stuff
		#------------------------------
		label = wx.StaticText(self,-1,_("Gest."),size = (50,20))
		label.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		label.SetForegroundColour(wx.Colour(0,0,0))

		self.txtgest = wx.TextCtrl(self,-1,"",size=(100,20))
		self.txtgest.Enable(False)
		self.txtgest.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		self.txtgest_szr  = wx.BoxSizer(wx.HORIZONTAL)
		self.txtgest_szr.Add(self.txtgest,1,wx.EXPAND|wx.ALL,2)

		szr_gest = wx.BoxSizer(wx.HORIZONTAL)
		szr_gest.Add(label, 1, 0, 0)
		szr_gest.Add((10,1),0,0)
		szr_rc.Add(szr_gest, flag=wx.EXPAND, row=1, col=1)
		szr_rc.Add(self.txtgest_szr, flag=wx.EXPAND, row=1, col=2, colspan=5)

		#------------------------------
		# sizer holding the 'EDC' stuff
		#------------------------------
		label = wx.StaticText(self,-1,_("EDC"),size = (50,20))
		label.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		label.SetForegroundColour(wx.Colour(0,0,0))

		self.txtedc = wx.TextCtrl(self,-1,"",size=(100,20))
		self.txtedc.Enable(False)
		self.txtedc.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		szr_txtedc = wx.BoxSizer(wx.HORIZONTAL)
		szr_txtedc.Add(self.txtedc,1,wx.EXPAND|wx.ALL,2)
		szr_edc = wx.BoxSizer(wx.HORIZONTAL)
		szr_edc.Add(label,1,0,0)
		szr_edc.Add((10,1),0,0)
		szr_rc.Add(szr_edc, flag=wx.EXPAND, row=2, col=1)
		szr_rc.Add(szr_txtedc, flag=wx.EXPAND, row=2, col=2, colspan=5)

		#------------------------------
		# "Ultrasound Scan" label
		#------------------------------
		us_label = wx.StaticText(self,-1,_("18 Week Ultrasound Scan"),size = (200,20))
		us_label.SetFont(wx.Font(10,wx.SWISS,wx.NORMAL,wx.BOLD,False,''))
		us_label.SetForegroundColour(wx.Colour(50,50,204))
		szr_backgrnd_18WkScanDue = wx.BoxSizer(wx.VERTICAL)
		szr_backgrnd_18WkScanDue.Add((1,3), 0)
		szr_backgrnd_18WkScanDue.Add(us_label,1,wx.EXPAND,1)
		szr_rc.Add(szr_backgrnd_18WkScanDue, flag=wx.ALIGN_CENTRE_HORIZONTAL, row=3, col=2, colspan=5)
		#------------------------------
		# sizer holding the 'Due' stuff
		#------------------------------
		label = wx.StaticText(self,-1,_("Due"),size = (100,20))
		label.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		label.SetForegroundColour(wx.Colour(0,0,0))

		self.txtdue = wx.TextCtrl(self,-1,"",size=(100,20))
		self.txtdue.Enable(False)
		self.txtdue.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		self.szr_txtdue  = wx.BoxSizer(wx.HORIZONTAL)
		self.szr_txtdue.Add(self.txtdue,1,wx.EXPAND|wx.ALL,2)
		szr_due = wx.BoxSizer(wx.HORIZONTAL)
		szr_due.Add(label,1,0,0)
		szr_due.Add((10,1),0,0)
		szr_rc.Add(szr_due, flag=wx.EXPAND, row=4, col=1)
		szr_rc.Add(self.szr_txtdue, flag=wx.EXPAND, row=4, col=2, colspan=5)

		#------------------------------
		# "Ultrasound Scan - Revised EDC" label
		#------------------------------
		rev_edc_label = wx.StaticText(self,-1,_("Ultrasound Scan - Revised EDC"),size = (300,20))
		rev_edc_label.SetFont(wx.Font(10,wx.SWISS,wx.NORMAL,wx.BOLD,False,''))
		rev_edc_label.SetForegroundColour(wx.Colour(50,50,204))
		szr_backgrnd_RevEDCLabel = wx.BoxSizer(wx.VERTICAL)
		szr_backgrnd_RevEDCLabel.Add((1,3), 0)
		szr_backgrnd_RevEDCLabel.Add(rev_edc_label,1,wx.EXPAND,1)
		szr_rc.Add(szr_backgrnd_RevEDCLabel, flag=wx.ALIGN_CENTRE_HORIZONTAL, row=5, col=2, colspan=5)

		#------------------------------
		# sizer holding the 'newedc' stuff
		#------------------------------
		label1 = wx.StaticText(self,-1,_("Scan Date"),size = (25,20))
		label1.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		label1.SetForegroundColour(wx.Colour(0,0,0))
		self.txtdate = wx.TextCtrl(self,-1,"",size=(25,20))
		self.txtdate.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		self.txtdate.SetToolTip(wx.ToolTip(_("Click on this field and then the ultrasound scan date on the calendar")))
		tipdue=self.txtdate.GetToolTip()
		wx.ToolTip_Enable(1)
		self.szr_txtdate  = wx.BoxSizer(wx.HORIZONTAL)
		self.szr_txtdate.Add(self.txtdate,1,wx.EXPAND|wx.ALL,2)
		wx.EVT_SET_FOCUS(self.txtdate, self.OnSetFocus_USDate)

		szr_label1 = wx.BoxSizer(wx.HORIZONTAL)
		szr_label1.Add(label1,1,0,0)
		szr_label1.Add((10,1),0,0)
		szr_rc.Add(szr_label1, flag=wx.EXPAND, row=6, col=1)
		szr_rc.Add(self.szr_txtdate, flag=wx.EXPAND, row=6, col=2, colspan=5)

		#------------------------------

		label2 = wx.StaticText(self,-1,_("Weeks"),size = (25,20))
		label2.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		label2.SetForegroundColour(wx.Colour(0,0,0))
		self.txtweeks = wx.SpinCtrl (self, -1, value = "0", min = 0, max = 42)
		wx.EVT_SPINCTRL (self.txtweeks ,self.txtweeks.GetId(), self.EvtText_calcnewedc)
		self.txtweeks.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		self.szr_txtweeks  = wx.BoxSizer(wx.HORIZONTAL)
		self.szr_txtweeks.Add(self.txtweeks,1,wx.EXPAND|wx.ALL,2)

		label3 = wx.StaticText(self,-1,_("Days"),size = (25,20))
		label3.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		label3.SetForegroundColour(wx.Colour(0,0,0))
		self.txtdays = wx.SpinCtrl (self, -1, value = "0", min = 0, max = 6)
		wx.EVT_SPINCTRL (self.txtdays ,self.txtdays.GetId(), self.EvtText_calcnewedc)
		self.txtdays.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		self.szr_txtdays  = wx.BoxSizer(wx.HORIZONTAL)
		self.szr_txtdays.Add(self.txtdays,1,wx.EXPAND|wx.ALL,2)

		szr_label2 = wx.BoxSizer(wx.HORIZONTAL)
		szr_label2.Add(label2,1,wx.ALIGN_CENTRE_VERTICAL,0)
		szr_label2.Add((10,1),0,0)
		szr_label3 = wx.BoxSizer(wx.HORIZONTAL)
		szr_label3.Add((10,1),0,0)
		szr_label3.Add(label3,1,wx.ALIGN_CENTRE_VERTICAL,0)
		szr_label3.Add((10,1),0,0)
		szr_rc.Add(szr_label2, flag=wx.EXPAND, row=7, col=1)
		szr_rc.Add(self.szr_txtweeks, flag=wx.EXPAND, row=7, col=2, colspan=2)
		szr_rc.Add(szr_label3, flag=wx.EXPAND, row=7, col=4)
		szr_rc.Add(self.szr_txtdays, flag=wx.EXPAND, row=7, col=5, colspan=2)

		#------------------------------
		# sizer holding the new (or revised) 'EDC' stuff
		#------------------------------
		label = wx.StaticText(self,-1,_("Rev EDC"),size = (100,20))
		label.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		label.SetForegroundColour(wx.Colour(0,0,0))

		self.txtnewedc = wx.TextCtrl(self,-1,"",size=(100,20))
		self.txtnewedc.Enable(False)
		self.txtnewedc.SetFont(wx.Font(12,wx.SWISS,wx.NORMAL,wx.NORMAL,False,''))
		self.szr_txtnewedc  = wx.BoxSizer(wx.HORIZONTAL)
		self.szr_txtnewedc.Add(self.txtnewedc,1,wx.EXPAND|wx.ALL,2)
		szr_label=wx.BoxSizer(wx.HORIZONTAL)
		szr_label.Add(label,1,0,0)
		szr_label.Add((10,1),0,0)
		szr_rc.Add(szr_label, flag=wx.EXPAND, row=8, col=1)
		szr_rc.Add(self.szr_txtnewedc, flag=wx.EXPAND, row=8, col=2, colspan=5)
		self.btnPrint = wx.Button(self,1011,_('&Print'))
		self.btnSave = wx.Button(self,1011,_('&Save'))
		szr_buttons = wx.BoxSizer(wx.HORIZONTAL)
		szr_buttons.Add(self.btnPrint,0,wx.EXPAND)
		szr_buttons.Add(self.btnSave,0,wx.EXPAND)
		szr_rc.Add(szr_buttons, flag=wx.EXPAND,row=9, col=3, colspan=4)
		#------------------------------
		# Sizer holding stuff on the right
		#------------------------------
		szr_main_rt = wx.BoxSizer(wx.VERTICAL)
		szr_main_rt.Add(szr_rc)
		wx.EVT_BUTTON(self,1010,self.EvtReset)
		wx.EVT_BUTTON(self,1011,self.EvtPrint)
		wx.EVT_BUTTON(self,1012,self.EvtSave)
		#------------------------------
		# Add calendar (stuff on the left)
		#------------------------------
		self.lmp_cal = wx.calendar.CalendarCtrl (self, ID_LMP,style = wx.RAISED_BORDER)
		wx.calendar.EVT_CALENDAR_SEL_CHANGED(self.lmp_cal, ID_LMP, self.OnCalcByLMP)

		szr_main_lf = wx.BoxSizer(wx.VERTICAL)
		szr_main_lf.Add(self.lmp_cal,0,wx.ALIGN_CENTRE_HORIZONTAL)
		btn_reset = wx.Button(self, 1010, _('&Reset'))
		#szr_main_lf.Add(5,0,5)
		szr_main_lf.Add(btn_reset,0,wx.EXPAND)

		#--------------------------------------
		# Super-sizer holds all the stuff above
		#--------------------------------------
		szr_main_top= wx.BoxSizer(wx.HORIZONTAL)
		szr_main_top.Add(szr_main_lf,0,0)
		szr_main_top.Add((15,0),0,0)
		szr_main_top.Add(szr_main_rt,0,0)
		#szr_main_top.Add(15,1,0,0)

		#------------------------------
		# Put everything together in one big sizer
		#------------------------------
		szr_main= wx.BoxSizer(wx.HORIZONTAL)
		szr_main.Add(szr_main_top,1,wx.EXPAND|wx.ALL,10)
		self.SetSizer (szr_main)
		self.SetAutoLayout (1)
		szr_main.Fit (self)

		wx.EVT_CLOSE (self, self.OnClose )

	#-----------------------------------------
	def OnCalcByLMP (self, event):

		if(self.xfer_cal_date_to==LMP_FIELD):
			# we do this the "UNIX Way" -- all dates are converted into seconds
			# since midnight 1 Jan, 1970.
			# .GetDate().GetTicks() returns time at 5AM.  The -18000 second
			#	correction adjusts LMP to 12AM ??? NOT NEEDED
			#	is it possible there is a BUG in the wxPython
			#	Day Light Savings/Standard Time Calc?

			#LMP = self.lmp_cal.GetDate ().GetTicks () - 18000 	# Standard Time Fix (?)
			self.lmp = self.lmp_cal.GetDate ().GetTicks ()		# Correct for Day Light Saving Time
			today = wx.DateTime_Today().GetTicks()
			due = self.lmp + GESTATION
			gest = today - self.lmp
			self.ultrasound18_52 = self.lmp + US18_52

			# -----------------
			# FIXME: use gmDateInput in gmDateTimeInput.py
			lmp_txt = wx.DateTime()			# FIXME? - change format of date (?)
			lmp_txt.SetTimeT(self.lmp)
			self.txt_lmp.SetValue(self.PurgeTime(lmp_txt))

			# -----------------
			gest_week = gest / WEEK
			gest_day = (gest % WEEK) / DAY
			if(gest_day==1):
				days_label=_('day')
			else:
				days_label=_('days')
			if(gest_week==1):
				weeks_label=_('week')
			else:
				weeks_label=_('weeks')
#			txtgest_str = "%s %s, %s %s" % (gest_week, weeks_label, gest_day, days_label)
			txtgest_str=str(gest_week)+" "+weeks_label+", "+str(gest_day)+" "+days_label
			self.txtgest.SetValue(txtgest_str)

			# -----------------
			edctxt = wx.DateTime()
			edctxt.SetTimeT(due)
			self.txtedc.SetValue(self.PurgeTime(edctxt))

			# -----------------
			self.ustxt = wx.DateTime()
			self.ustxt.SetTimeT(self.ultrasound18_52)
			self.txtdue.SetValue(self.PurgeTime(self.ustxt))

		else:
			# set Ultrasound Date
			self.usdate = self.lmp_cal.GetDate ().GetTicks ()
			usdatetxt = wx.DateTime()	# FIXME? - change format of date
			usdatetxt.SetTimeT(self.usdate)
			self.txtdate.SetValue(self.PurgeTime(usdatetxt))

			# recalculate 'Rev EDC' if Ultrasound Scan Date is changed
			if( self.txtnewedc.GetValue() !=""):
				self.EvtText_calcnewedc(self)

	#-----------------------------------------
	def EvtText_calcnewedc (self, event):
		try:
			weeks=self.txtweeks.GetValue()
			days=self.txtdays.GetValue()

			# get date of ultrasound
			newedc=self.usdate+GESTATION-WEEK*weeks-DAY*days

			wx.D=wx.DateTime()
			wx.D.SetTimeT(newedc)
			self.txtnewedc.SetValue(self.PurgeTime(wx.D))
		except Exception:
			pass	# error handling - FIXME is 'try' statement necessary (?)

	#-----------------------------------------
	def EvtReset(self, event):
		# reset variables
		self.txt_lmp.SetValue("")
		self.txtgest.SetValue("")
		self.txtedc.SetValue("")
		self.txtdue.SetValue("")

		self.txtdate.SetValue("")
		self.ustxt=wx.DateTime_Today()

		self.txtweeks.SetValue(0)			# FIXME - MAKE IT RESET TO BLANK?
		self.txtdays.SetValue(0)
		self.txtnewedc.SetValue("")

		self.xfer_cal_date_to=LMP_FIELD
		self.lmp_cal.SetDate(wx.DateTime_Today())	# reset Calendar to current date

	#-----------------------------------------
	def EvtPrint(self, event):
		pass 					# TODO
	#-----------------------------------------
	def EvtSave(self, event):
		pass 					# TODO
	#-----------------------------------------
	#def EvtHandout(self, event):
	#	pass 					# TODO
	#-------------------------------------------
	def OnClose (self, event):
		self.Destroy ()

	#-------------------------------------------
	def PurgeTime(self, date):			# a not so elegant way of removing the time
		time_loc=string.find(str(date),":00:00")
		date_str=str(date)
		return date_str[:(time_loc-3)]

	#-------------------------------------------
	def OnSetFocus_lmp (self, event):
		self.xfer_cal_date_to=LMP_FIELD
		event.Skip()				# required so wxTextCtrl box is selected

	#-------------------------------------------
	def OnSetFocus_USDate (self, event):
		self.lmp_cal.SetDate(self.ustxt)	# flip calendar to 18/52 date
		self.xfer_cal_date_to=US_FIELD
		event.Skip()



#====================================================================
# Main
#====================================================================
if __name__ == '__main__':
	# set up dummy app
	class TestApp (wx.App):
		def OnInit (self):
			frame = cPregCalcFrame(None)
			frame.Show(1)
			return 1
	#---------------------
	import gettext
	_ = gettext.gettext
	gettext.textdomain ('gnumed')
	app = TestApp()
	app.MainLoop()

#=====================================================================