import clutter
import time
lasttime=1
lastbin=0
lastbout=0
black =clutter.Color(0,0,0,255)
red = clutter.Color(255, 0, 0, 255)
green =clutter.Color(0,255,0,255)
blue =clutter.Color(0,0,255,255)

def updatespeed(t, a, b):
    global lasttime, lastbin, lastbout
    f=open('/proc/net/dev','r')
    for line in f.readlines():
        line=line.strip()
        
        if (line[:4] == 'eth0'):
            line=line[5:].split()
            bin=int(line[0])
            bout=int(line[8])
            timedelta=time.time()-lasttime
            lasttime=time.time()
            speedin=round((bin-lastbin)/(1024*timedelta), 2)
            speedout=round((bout-lastbout)/(1024*timedelta), 2)
            lastbin, lastbout = bin,  bout
            a.set_text(str(speedin)+'KB/s')
            xx, yy=a.get_size()
            a.set_position(int((300-xx)/2),int((100-yy)/2) )
            b.set_text(str(speedout)+'KB/s')
            xx, yy=b.get_size()
            b.set_position(int((300-xx)/2),int((100-yy)/2)+100 )

def parseKeyPress(self, event):

    # Parses the keyboard
    #As this is called by the stage object
    if event.keyval == clutter.keysyms.q:
        #if the user pressed "q" quit the test
        clutter.main_quit()
    elif event.keyval == clutter.keysyms.r:
        #if the user pressed "r" make the object red
        self.set_color(red)
    elif event.keyval == clutter.keysyms.g:
        #if the user pressed "g" make the object green
        self.set_color(green)
    elif event.keyval == clutter.keysyms.b:
        #if the user pressed "b" make the object blue
        self.set_color(blue)
    elif event.keyval == clutter.keysyms.Up:
        #up-arrow = make the object black
        self.set_color(black)
    print 'event processed',  event.keyval

stage = clutter.Stage()
stage.set_size(300,200)
stage.set_color(blue)
stage.connect('key-press-event', parseKeyPress)
intext=clutter.Text()
intext.set_font_name("Sans 30")
intext.set_color(green)
stage.add(intext)
outtext=clutter.Text()
outtext.set_font_name("Sans 30")
outtext.set_color(red)
stage.add(outtext)
stage.show_all()    
t=clutter.Timeline()
t.set_duration(5000)
t.set_loop(True)
t.connect('completed', updatespeed, intext, outtext)
t.start()
clutter.main()