# vertical_text_scroll.py

# vertical_text_scroll.py

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

run=1
def exit():global run; run=0
app.exit_key_handler=exit
app_lock=e32.Ao_lock()

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

img=None
appuifw.app.screen='large'
appuifw.app.orientation='portrait'
appuifw.app.directional_pad=False
appuifw.app.body=canvas=Canvas(redraw_callback=draw)
img=Image.new(canvas.size)

w, h=canvas.size

def up_event(event):
    pass
def dn_event(event):
    pass
canvas.bind(key_codes.EButton1Up, up_event, ((0,0), (w,h)))
canvas.bind(key_codes.EButton1Down, dn_event, ((0,0), (w,h)))

def mv_event(event):
    pass
canvas.bind(key_codes.EDrag, mv_event, ((0,0), (w,h)))

img.clear()

W,G,Y=((255,255,255),(0,255,0),(255,255,0))
f1,f2=(u'Normal', 30), (u'Normal', 25)
t1=u'Programming PyS60'
t2=u'A Vertical Text Scroll Demo'
a=img.measure_text(t1,f1)
b=img.measure_text(t2,f2)
distance=h/2+25
while run:
    for i in range(distance):
        t2h=(h-25)-i*4
        color=int(255+i*1.5)
        Bg=(0,color,255)
        img.clear(Bg)
        img.text((5,20),u'* Length: %s'%i, 0)
        img.text(((w-b[0][2])/2,(h-25)-i*4),t2,0,f2)
        img.text(((w-b[0][2])/2-2,(h-25-1)-i*4-2),t2,G,f2)
        img.text(((w-a[0][2])/2,35+i*4),t1,0,f1)
        img.text(((w-a[0][2])/2-2,35-1+i*4-2),t1,Y,f1)
        img.rectangle((0,0,w,h),Y)
        e32.ao_sleep(0.03)
        draw(())
        if not run or t2h < distance: break
    if run: e32.ao_sleep(2)
    e32.ao_yield() # bottom of _running_loop_'''