# py60snowfall.py

# py60snowfall.py

import e32,audio,appuifw,os,sys,key_codes,time,math,random,graphics,sensor
import sysinfo

yscr=sysinfo.display_pixels()[1]
xscr=sysinfo.display_pixels()[0]
nflakes=240
imgSnow=8
WHITE=0xffffff
LBLUE=0x000080

moveX=range(nflakes)
moveY=range(nflakes)
XX=range(nflakes)
YY=range(nflakes)

for i in range(nflakes):
    moveY[i]=random.randint(5,20)
    dir=random.choice([-1,1])
    moveX[i]=dir*random.randint(1,3)
    XX[i]=random.randint(0,xscr)
    YY[i]=random.randint(0,yscr)

def falling():
    global moveX,moveY,XX,YY
    img.clear(LBLUE)
    for i in range(nflakes):
        dir=random.choice([-1,1])
        moveX[i]=dir*moveX[i]
        XX[i]=XX[i]+moveX[i]
        YY[i]=YY[i]+moveY[i]
        if((XX[i]>xscr)or(XX[i]<0)):
            moveX[i]=-moveX[i]
        if(YY[i]>yscr):
            moveY[i]=random.randint(1,24)
            dir=random.choice([-1,1])
            moveX[i]=dir*random.randint(1,3)
            XX[i]=random.randint(0,xscr)
            YY[i]=dir*random.randint(1,24)
        img.ellipse([(XX[i],YY[i]),(XX[i]+imgSnow,YY[i]+imgSnow)],WHITE,fill=WHITE)
    canvas.blit(img,(0,0))
    timer.after(0.1,falling)
    draw(())

def draw(rect):
    try:
        canvas.blit(img)
    except:pass
    appuifw.e32.reset_inactivity()

def exit(pos):
    app_lock.signal()

img=graphics.Image.new((xscr,yscr))
appuifw.app.directional_pad=False
canvas=appuifw.Canvas(redraw_callback=draw)
appuifw.app.body=canvas
canvas.bind(key_codes.EButton1Down,exit)
appuifw.app.screen='full'

timer=appuifw.e32.Ao_timer()
appuifw.app.orientation='portrait'
falling()
e32.ao_yield()

app_lock=appuifw.e32.Ao_lock()
app_lock.wait()
timer.cancel()