# Graphical interface for scramble server program
import pygtk
import gtk
import pango

# independent function to add new text to the end of a gtk.TextView object:
def addtext(TV,text):
    buffer = TV.get_buffer()
    iter = buffer.get_iter_at_mark(buffer.get_insert())
    buffer.insert(iter,text)   # use "\n" for newlines
    TV.scroll_to_iter(iter,0.1) 
# addtext 

class servergui:

  def __init__(this,port):
    this.width, this.height = 512,640  # window dimensions
    this.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
    this.window.set_title("Scrambler Server Interface")
    this.window.connect("destroy", lambda w: gtk.main_quit())
    
    # define principal vertical box
    mainvbox = gtk.VBox(False, 5) # homogenous spacing, pixels between...
    this.window.add(mainvbox)  # add box container to window

    # a small horizontal boxes for buttons and checkboxes
    hbox1 = gtk.HBox(False,32)  # can be local var if not referred to outside
    hbox2 = gtk.HBox(False,32)
    
    # textview to display message from student + label
    this.toplabel = gtk.Label("Waiting for connection...")
    this.textarea = gtk.TextView()
    this.textarea.set_size_request(500,400)
    this.textarea.set_editable(False)
    
    # buttons to optionally select scramble 1,2
    this.s1button = gtk.Button("Descramble1")
    this.s2button = gtk.Button("Descramble2")
    # pack buttons into small hbox
    hbox1.pack_start(this.s1button,True,True,5)
    hbox1.pack_start(this.s2button,True,True,5)

    # text entry for professor's response to students
    this.entry = gtk.Entry(256)  # 256 is size in chars
    
    # 2 checkboxes
    this.s2check = gtk.CheckButton("Advanced Scramble")
    this.filecheck = gtk.CheckButton("Send File")
    # pack checkboxes into hbox2
    hbox2.pack_start(this.s2check,True,True,5)
    hbox2.pack_start(this.filecheck,True,True,5)
    
    # pack everything into main verticle box
    mainvbox.pack_start(this.toplabel,True,True,5)
    mainvbox.pack_start(this.textarea,True,True,5)
    mainvbox.pack_start(hbox1,True,True,5)
    mainvbox.pack_start(this.entry,True,True,5)
    mainvbox.pack_start(hbox2,True,True,5)

    #### this sets the visual attributes, now set event handlers
    this.s1button.connect("clicked",this.descram)
    this.s2button.connect("clicked",this.descram)
    this.entry.connect("activate",this.sender)

    # other attributes
    this.entry.modify_font(pango.FontDescription("Sans 12")) #set font
    this.window.show_all()  # actually displays window
  #__init__

  ##### event handler routines
  def descram(this,widget): # can handle either descram button
     if widget==this.s1button: 
         addtext(this.textarea,"Using simple descramble...\n")
     if widget==this.s2button: 
         addtext(this.textarea,"Using advanced descramble...\n")     
  #descram

  # this function is called when prof hits enter on the text Entry area
  def sender(this,widet):
     # check check boxes to determine how to interpret text
     s2checked = this.s2check.get_active()
     filechecked = this.filecheck.get_active()
     if s2checked: addtext(this.textarea,"Sending using advanced scramble\n")
     else: addtext(this.textarea,"Sending using simple scramble\n")
     if filechecked: addtext(this.textarea,"Sending scrambled file...\n")
     else: addtext(this.textarea,"Sending scrambled text to sucker...\n")
     # clear text
     this.entry.set_text("")  # get_text() will return text as string
  # sender
    
#servergui class

# create instance of servergui class to listen on port:
sg1 = servergui(12004)
addtext(sg1.textarea,"received lame joke from student...\n")

# can create second instance of class to listen on different port
# sg2 = servergui(12005)


# must be last line:
gtk.main()