# File: upc.py

# based on upc.py

from Tkinter import *

master = Tk()

bigFont = "Helvetica 24"
fsaWidth = 300
fsaHeight = 300
charHeight = 25
charWidth = 10
lightSize = 30
epsilon = 4

def makeFsa(fsa):
	recX1 = fsaWidth/3
	recX2 = fsaWidth*2/3
	CY1 = charHeight*5
	BY1 = charHeight*3
	AY1 = charHeight*1
	fsa.create_rectangle(recX1, 0, recX2, fsaHeight/2, fill="black",tags="box",width=0)
	fsa.create_text(recX1-charWidth,AY1,text="A",tag="in",font=bigFont)
	fsa.create_text(recX2+charWidth,AY1,text="A",tag="out",fill="blue",font=bigFont)
	fsa.create_text(recX1-charWidth,BY1,text="B",tag="in",font=bigFont)
	fsa.create_text(recX2+charWidth,BY1,text="B",tag="out",fill="blue",font=bigFont)
	fsa.create_text(recX1-charWidth,CY1,text="C",tag="in",font=bigFont)
	fsa.create_text(recX2+charWidth,CY1,text="C",tag="out",fill="blue",font=bigFont)
	CX1 = fsaWidth/3-charWidth*5
	inX1 = recX1-2*charWidth
	fsa.create_line(inX1,CY1,CX1,CY1,fill="blue",arrow="first")
	CX2 = recX2+charWidth*5
	inX2 = recX2+2*charWidth
	CY2 = CY1 + charWidth*4
	fsa.create_line(CX1,CY1,CX1,CY2,fill="blue")
	fsa.create_line(CX1,CY2,CX2,CY2,fill="blue")
	fsa.create_line(CX2,CY1,CX2,CY2,fill="blue")
	fsa.create_line(inX2,CY1,CX2,CY1,fill="blue")
	BX1 = CX1-charWidth
	fsa.create_line(inX1,BY1,BX1,BY1,fill="blue",arrow="first")
	BY2 = CY2 + charWidth
	fsa.create_line(BX1,BY1,BX1,BY2,fill="blue")
	BX2 = CX2+charWidth
	fsa.create_line(BX1,BY2,BX2,BY2,fill="blue")
	fsa.create_line(BX2,BY2,BX2,BY1,fill="blue")
	fsa.create_line(BX2,BY1,inX2,BY1,fill="blue")
	AX1 = BX1-charWidth
	fsa.create_line(inX1,AY1,AX1,AY1,fill="blue",arrow="first")
	AY2 = BY2 + charWidth
	fsa.create_line(AX1,AY1,AX1,AY2,fill="blue")
	AX2 = BX2+charWidth
	fsa.create_line(AX1,AY2,AX2,AY2,fill="blue")
	fsa.create_line(AX2,AY2,AX2,AY1,fill="blue")
	fsa.create_line(AX2,AY1,inX2,AY1,fill="blue")

fsa = Canvas(master, width=fsaWidth, height=fsaHeight*2/3)
makeFsa(fsa)
fsa.grid(row=1,column=0,rowspan=8,columnspan=2)

Label(master,text="Button X",font=bigFont).grid(row=0,column=0)

X = False
# let go of the button
def release():
	global X
	X = False

# push the button
def push(event):
	global X
	X = True

button = Button(master,command=release)
button.grid(row=0,column=1)
button.bind("<Button-1>", push)

# def foo(e):
# 	print "gotcha"

entryWidth = 40
enter = range(3)
entry = range(3)
label = range(3)
for i in range(3):
	label[i] = Label(master, text=chr(ord('A')+i),fg="blue",bg="white")
	label[i].grid(row=i,column=2)
	enter[i] = StringVar()
	entry[i] = Entry(master, width=entryWidth,textvariable=enter[i])
	entry[i].insert(INSERT,"False")
	entry[i].grid(row=i,column=3)
#	entry[i].bind('<Return>',foo)

enterLight = range(8)
entryLight = range(8)
canvasLight = range(8)
ovalLight = range(8)
color = ["red","blue","green","purple","orange","red","green","yellow"]
for i in range(8):
	canvasLight[i] = Canvas(master,height=lightSize,width=lightSize)
	canvasLight[i].grid(row=i+3,column=2)
	ovalLight[i] = canvasLight[i].create_oval(epsilon,epsilon,lightSize-epsilon,lightSize-epsilon,fill=color[i])
	enterLight[i] = StringVar()
	entryLight[i] = Entry(master, width=entryWidth, textvariable=enterLight[i])
	entryLight[i].insert(INSERT,"False")
	entryLight[i].grid(row=i+3,column=3)

(A,B,C) = (False,False,False)

def update():
	global A
	global B
	global C
	global X
	newval = range(3)
	for i in range(3):
		try:
			newval[i] = eval(enter[i].get())
		except:
			newval[i] = False
		if newval[i]:
			label[i].configure(bg="yellow")
		else:
			label[i].configure(bg="white")
	# next click
	(A,B,C) = newval
	# new lights
	for i in range(8):
		try:
			val = eval(enterLight[i].get())
		except:
			val = False
		if val:
			canvasLight[i].itemconfig(ovalLight[i],fill=color[i])
		else:
			canvasLight[i].itemconfig(ovalLight[i],fill="white")
	master.after(1000, update)

master.after(1000, update)

master.mainloop()