#!/usr/bin/env python
""" very light isa hmi mockup
prog de test infrastructure ivy + mini ihm type isa """

import traceback, time, os, sys, string, getopt
from Tkinter import *
from ivycpy import *

APPNAME = "vl_isa"

def lprint(fmt,*arg):
	print APPNAME + ": " + fmt % arg

def usage(scmd):
	lpathitem = string.split(scmd,'/')
	fmt = '''Usage: %s [-h] [-b IVYBUS | --ivybus=IVYBUS] [-n APPNAME | --name=APPNAME] 
where
\t-h provides the usage message;
\t-n APPNAME | --name=APPNAME  
\t-b IVYBUS | --ivybus=IVYBUS allow to provide the IVYBUS string in the form
\t adresse:port eg. 127.255.255.255:2010
'''
	print fmt   %  lpathitem[-1]

def oncxproc(connected):
	if connected == IvyApplicationDisconnected :
		lprint("an IvyApplication was Disconnected")
	else:
		lprint("an IvyApplication was Connected")

def ondieproc(id):
	lprint("we ask me to die with id [%d]", id )

class TopLevel(Tk) :
	__single = 0
	def __init__(self,appname = "TopLevel"):
		if TopLevel.__single != 0 :
			lprint("TopLevel is singleton")
			sys.exit(1)
		__single = 1
		# the object is tk_root
		Tk.__init__(self) 
		self.appname = appname
		self.title(self.appname)
		# Frame contenant heure et bouton quit 
		self.tkFheadpanel = Frame(self)
		# Label hour
		self.tkLhour =  Label(self.tkFheadpanel,text="hh:mm:ss")
		self.tkLhour.pack(padx=4 , pady=4 , side = LEFT)
		# dummy button
## 		self.tkBdummy = Button(self.tkFheadpanel, 
## 							  text="dummy",  bg='pink')
## 		self.tkBdummy.pack(padx=4 , pady=4, side = RIGHT)
		
		# button quit
		self.tkBquit = Button(self.tkFheadpanel, 
							  text="QUIT",  bg='pink', command=self.quit)
		self.tkBquit.pack(padx=4 , pady=4, side = RIGHT)
		self.tkFheadpanel.pack(side=TOP)
	
		# Frame contenant un Label, un Text et un Scroller
		self.tkFreceive_msg = Frame(self)
		# label
		self.tkLreceive_msg = Label(self.tkFreceive_msg, text="flyingonthebus")
		self.tkLreceive_msg.pack(padx=4 , pady=4,
								 side=TOP, fill = BOTH, expand = YES)
		# Text
		self.tkTreceive_msg = Text(self.tkFreceive_msg, height=26, width=50)
		# Scrollbar
		self.tkSBreceive_scroller = Scrollbar(
			self.tkFreceive_msg,
			command = self.tkTreceive_msg.yview)
		self.tkTreceive_msg.configure(
			yscrollcommand = self.tkSBreceive_scroller.set)

		self.tkTreceive_msg.pack(padx=4 , pady=4,
								 side=LEFT, fill = BOTH, expand = YES)
		self.tkSBreceive_scroller.pack(side=RIGHT, fill = Y)
		self.tkFreceive_msg.pack(side=BOTTOM, fill = BOTH, expand = YES)

	def add_one_msg(self, smsg) :
		self.tkTreceive_msg.insert(END, "%s\n" % smsg )

	def onmsgproc(self,*arg) :
		self.add_one_msg(string.join(arg,""))

	def quit(self):
		# cleanup action before detroying tk_root
		lprint("doing IvyStop")
		IvyStop()
		lprint("doing destroy" )
		self.destroy()
		lprint("after destroy")
		lprint("done.")

## 	def ontick(self):
## 		lprint("on tick method")
## 		IvySendMsg("testtk_tick")
## 		self.after(1000,self.ontick)

# main prog
if __name__ == '__main__':
	# setting some main variable
	sivybus = ""	

	# getting option
	try:
		optlist, left_args = getopt.getopt(sys.argv[1:],'hb:n:', ['ivybus=','name'])
	except getopt.GetoptError:
		# print help information and exit:
		usage(sys.argv[0])
		sys.exit(2)
	for o, a in optlist:
		if o in ("-h", "--help"):
			usage(sys.argv[0])
			sys.exit()
		elif o in ("-b", "--ivybus"):
			sivybus = a
		elif o in ("-n","--name"):
			APPNAME = a 
	if sivybus != "" :
		sechoivybus = sivybus
	elif os.environ.has_key("IVYBUS"):
		sechoivybus = os.environ["IVYBUS"]
	else:
		sechoivybus = "ivydefault"
	lprint("Ivy will broadcast on %s " , sechoivybus)

	# initializing ivy : isreadymsg
	sisreadymsg = "[%s is ready]" % APPNAME
	IvyInit(APPNAME, sisreadymsg, 1 ,  oncxproc,  ondieproc )
	IvyStart(sivybus)

	# initializing top hmi part
	mytoplevel = TopLevel("%s top window" % APPNAME)

	# doing suited binding
	IvyBindMsg(mytoplevel.onmsgproc , "(.*)")
		
	mytoplevel.mainloop()