# Demonstration on how to use the GTK-server with Python by UDP.
# Should work with Python 2.2.2 on Linux and Windows platforms.
#
# August 2, 2004 by PvE with new GTK-server commandline syntax.
# Based on the TCP demo script by Evan Hempel.
# Revised for GTK-server 1.2 October 8, 2004 by PvE.
# Revised for GTK-server 1.3 December 6, 2004 by PvE.
#
# Run with python. Start with 'python demo.py'.

import os
import time
import socket

# Define sending bytes to UDP socket
def send(server, data):
  server.send(data)

# Define receiving bytes by UDP socket
def recieve(server):
  data = []
  data.append(server.recv(32))  # get 32 bytes at a time
  
  ret = ''.join(data)
  return ret

# start the server
os.spawnlp(os.P_NOWAIT, 'gtk-server', 'gtk-server', '-udp=localhost:50000 -detach')
time.sleep(0.25) # wait a quarter second for server to start

gtk_server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
gtk_server.connect(('localhost', 50000))

send(gtk_server, "gtk_init NULL NULL")
tmp = recieve(gtk_server)
send(gtk_server, "gtk_window_new 0")
win = recieve(gtk_server)
send(gtk_server, "gtk_window_set_title "+win+" \"Python Demo program with UDP\"")
tmp = recieve(gtk_server)
send(gtk_server, "gtk_widget_set_usize "+win+" 450 400")
tmp = recieve(gtk_server)
send(gtk_server, "gtk_table_new 50 50 1")
table = recieve(gtk_server)
send(gtk_server, "gtk_container_add "+win+" "+table)
tmp = recieve(gtk_server)
send(gtk_server, "gtk_button_new_with_label Exit")
button = recieve(gtk_server)
send(gtk_server, "gtk_table_attach_defaults "+table+" "+button+" 41 49 45 49")
tmp = recieve(gtk_server)
send(gtk_server, "gtk_entry_new")
entry = recieve(gtk_server)
send(gtk_server, "gtk_table_attach_defaults "+table+" "+entry+" 1 40 45 49")
tmp = recieve(gtk_server)
send(gtk_server, "gtk_text_new NULL NULL")
text = recieve(gtk_server)
send(gtk_server, "gtk_table_attach_defaults "+table+" "+text+" 1 49 8 44")
tmp = recieve(gtk_server)

send(gtk_server, "gtk_radio_button_new_with_label_from_widget NULL Yes")
radio1 = recieve(gtk_server)
send(gtk_server, "gtk_table_attach_defaults "+table+" "+radio1+" 1 10 1 4")
tmp = recieve(gtk_server)
send(gtk_server, "gtk_radio_button_new_with_label_from_widget "+radio1+" No")
radio2 = recieve(gtk_server)
send(gtk_server, "gtk_table_attach_defaults "+table+" "+radio2+" 1 10 4 7")
tmp = recieve(gtk_server)

send(gtk_server, "gtk_widget_show_all "+win)
tmp = recieve(gtk_server)
send(gtk_server,  "gtk_widget_grab_focus "+entry)
tmp = recieve(gtk_server)

event = 0

while event != button:
  send(gtk_server, "gtk_server_callback wait")
  event = recieve(gtk_server)
  if event == entry:
    send(gtk_server, "gtk_entry_get_text "+entry)
    tmp = recieve(gtk_server)
    send(gtk_server,  "gtk_text_insert "+text+" NULL NULL NULL "+tmp+" -1")
    tmp = recieve(gtk_server)
    send(gtk_server, "gtk_entry_set_text "+entry+" \" \"")
    tmp = recieve(gtk_server)

send(gtk_server, "gtk_server_exit")  # exit