Nokia Internet Tablet N8XX     

#!/usr/bin/env python
# via http://lost-theory.org/python/dynamicimg.html

import Image,ImageDraw
import re
import os


filename = "/media/mmc1/battery.log"
imagename = "/media/mmc1/graph.png"


log = file(r"%s" % filename)
line = len(log.readlines())
X = line+60
Y = 130 #image width and height
log.close()

def graph(filename):

    img = Image.new("RGB", (X,Y), "#FFFFFF")
    draw = ImageDraw.Draw(img)

    #draw some axes and markers
    #for i in range(X/6):
        
        #if i % 5 == 0:
            #draw.text((i*10+15, Y-15), `i*10`, fill="#000")
    for j in range(1,Y/10-2):
        draw.text((0,Y-15-j*10), `j*10`, fill="#000")
    draw.line((20,Y-19,X,Y-19), fill="#000")
    draw.line((19,20,19,Y-18), fill="#000")

    #read in file and graph it
    ots4et=0
    log = file(r"%s" % filename)
    for (i, value) in enumerate(log):
        proc = value[22:26]
        chas = value[15:17]
        min = value[18:20]
    data = value[1:13]
    if i==1:
            draw.text((i+25, Y-120), data, fill="#000")
        if re.search("Charging", value):
        if ots4et == 0:
        #draw.line((i+20, Y-15, i+20, 20), fill="#DDD")
        draw.line((i+20,Y-20,i+20,Y-30), fill="#33CC33")

        else:
        hours,minutes = divmod(ots4et, 60)
        worktime="%s:%s" % (hours, minutes)
        draw.line((i+20,Y-20,i+20,Y-30), fill="#33CC33")
        draw.text((i+15, Y-15), worktime, fill="#000")
        ots4et = 0
    
        else:
        if re.search("---", value):
            draw.line((i+20, Y-15, i+20, 20), fill="#000")
        else:
            chas = int(chas)
            min = int(min)
            ots4et=ots4et+10
            proc = eval(proc)

            if min == 0:

                draw.line((i+20, Y-15, i+20, 20), fill="#DDD")
                draw.line((i+20,Y-20,i+20,Y-10-proc), fill="#fff")

                #if chas % 2 == 0:
                #draw.text((i+15, Y-15), `ots4et`, fill="#000")
            else:
                draw.line((i+20,Y-20,i+20,Y-10-proc), fill="#55d")
    if i==line-1:
        hours,minutes = divmod(ots4et, 60)
        worktime="%s:%s" % (hours, minutes)
        draw.text((i+15, Y-15), worktime, fill="#000")    

 

    img.save(imagename)

log.close()
graph(filename)
image="/usr/bin/browser --url file://%s" % (imagename)
os.system(image)