Canvas.py

#this script draws different shapes and text to canvas
import appuifw
from appuifw import*
import e32
#import graphics
from graphics import*

#create an exit handler
def quit():
    global running
    running =0
    appuifw.app.set_exit()

#set the screen size to large
appuifw.app.screen="large"
#define an intial image(white)
img=Image.new((176,208))
#add different shapes and text to the Image
#coord. Sequence x1,x2,y1,y2
img.line((20,20,20,120),0xff00e)
img.rectangle((40,60,50,80),0xff0000)
img.point((50,150),0xff0000,width=40)
img.ellipse((100,150,150,180),0x0000ff)
img.text((100,80),u'Gaurav')

#define your redraw function (that redraws the picture on and on)
#in this case we redraw the image named img using blit function
def handle_redraw(rect):
    canvas.blit(img)

running=1

#define canvas,include the redraw callback function
canvas=appuifw.Canvas(event_callback=None,redraw_callback=handle_redraw)
#set the appbody to canvas
appuifw.app.body=canvas
appuifw.exit_handler=quit

while running:
    #redraw the screen
    handle_redraw()
    #yield need to be here in order that key pressing can be noticed
    e32.ao_yield()