Rainbow

# Rainbow
# Joe, 18/12/2014
import appuifw as A
import graphics as G

def h2r(h,s,v):
 if s==0.0: return v,v,v
 i=int(h*6.0)
 f=(h*6.0)-i
 p=v*(1.0-s)
 q=v*(1.0-s*f)
 t=v*(1.0-s*(1.0-f))
 if i%6==0:return v,t,p
 if i==1:return q,v,p
 if i==2:return p,v,t
 if i==3:return p,q,v
 if i==4:return t,p,v
 if i==5:return v,p,q

def gen(n=256):
 hsv=[(x*0.9/n,0.6,0.9) for x in xrange(n)]
 rgb=map(lambda x: tuple(map(lambda x:int(x*255), h2r(*x))),hsv)
 return rgb

run=1
def stop():
 global run
 run=0

A.app.screen='full'
A.app.body=c=A.Canvas()
A.app.exit_key_handler=stop
w,h=c.size
img=G.Image.new((w,h))

n=int(40)
col=gen(n)
x,y=0,h
rx,ry=w/2+40,h/2+40
for i in range(h+1):
 img.line((0,h-i,w,h-i),(123,174,5+i))

for i in range(n):
 img.arc((x-rx-i,y-ry-i,x+rx+i,y+ry+i),0,90,col[i])

txt='Rainbow - Joe...'
ltext=txt[:]
for i in range(len(ltext)):
 img.text((5+(i*8),h-10),u'%s' %ltext[i],col[i*2],(u'Sans MT 936_S60',26,G.FONT_BOLD))

while run:
 c.blit(img)
 A.e32.ao_sleep(1e-04)