#!/usr/bin/env python
#
#       pparaleloaztk.py
#      
#       CopyLeft 2008 Aztk
#      
#       This program is free software; you can redistribute it and/or modify
#       it under the terms of the GNU General Public License as published by
#       the Free Software Foundation; either version 2 of the License, or
#       (at your option) any later version.
#      
#       This program is distributed in the hope that it will be useful,
#       but WITHOUT ANY WARRANTY; without even the implied warranty of
#       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#       GNU General Public License for more details.
#      
#       You should have received a copy of the GNU General Public License
#       along with this program; if not, write to the Free Software
#       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
#       MA 02110-1301, USA.

# IMPORTANT - To run the program you need superuser permissions

# "parport" is a library from
# http://pyparport.sourceforge.net/
# Thanks to the parport's developers
from parport import ParallelPort

import pygtk
pygtk.require('2.0')
import gtk
p = ParallelPort(0x378)
pdatax = 0

class ParalellX:
       
        # This callback write a data in parallel port
    def callback(self, widget, data=None):
        global pdatax
       
        # When the button is hold on
        if (widget.get_active()):
                pdatax = pdatax + data
                print "data = %s" %(pdatax)
                p.write(pdatax)
               
        # When the button is hold off
        else:
                pdatax = pdatax - data
                print "data = %s" %(pdatax)
                p.write(pdatax)
       
    # This callback quits the program
    def delete_event(self, widget, event, data=None):
        p.write(0)
        return gtk.FALSE
       
    def destroy(self, widget, data=None):
        p.write(0)
        print "data = 0"
        print "Good Wave"
        gtk.main_quit()
       
    def __init__(self):
        # Create a new window
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.window.set_title("ParalellX")
        self.window.connect("delete_event", self.delete_event)
        self.window.set_border_width(20)
        # Create a vertical box
        vbox = gtk.VBox(gtk.TRUE, 2)
        self.window.add(vbox)
               
                # Create the data buttons (D0...D7)
        #D0
        button = gtk.ToggleButton("D0")
        button.connect("toggled", self.callback, 1)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
        #D1
        button = gtk.ToggleButton("D1")
        button.connect("toggled", self.callback, 2)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
        #D2
        button = gtk.ToggleButton("D2")
        button.connect("toggled", self.callback, 4)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
        #D3
        button = gtk.ToggleButton("D3")
        button.connect("toggled", self.callback, 8)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
        #D4
        button = gtk.ToggleButton("D4")
        button.connect("toggled", self.callback, 16)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
        #D5
        button = gtk.ToggleButton("D5")
        button.connect("toggled", self.callback, 32)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
        #D6
        button = gtk.ToggleButton("D6")
        button.connect("toggled", self.callback, 64)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
        #D7
        button = gtk.ToggleButton("D7")
        button.connect("toggled", self.callback, 128)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
       
        # Add a separator for the quitbutton
        separator = gtk.HSeparator()
        separator.set_size_request(120, 5)
        vbox.pack_start(separator, gtk.FALSE, gtk.TRUE, 5)
        separator.show()

        # Create "Quit" button
        button = gtk.Button("Quit")
        button.connect("clicked", self.destroy, None)
        vbox.pack_start(button, gtk.TRUE, gtk.TRUE, 2)
        button.show()
               
        # Add a label
        #label = gtk.Label("Aztk CopyLeft08")
        #label.set_alignment(0, 0)
        #vbox.pack_start(label, gtk.FALSE, gtk.FALSE, 0)
        #label.show()
       
        vbox.show()
        self.window.show()
           
def main():
    gtk.main()
    return 0      

if __name__ == "__main__":
    ParalellX()
    main()

# This code is inspirated in a munguis' code
# Thanks munguis

# http://www.pygtk.org/pygtk2tutorial-es/
# A great tuto about pygtk