Multiselect Checkbox 2

# multiselect checkbox v2
# author: joe
import appuifw as A
import graphics as G

run=1
def exit():
 global run
 run=0
A.app.exit_key_handler=exit
img=G.Image.new(G.sysinfo.display_pixels())

class CSelect:
 def __init__(self,items=[]):
  self.cur,self.page,self.offset=0,0,12
  self.items=items
  self.tmp=[]
  self.c=A.Canvas(redraw_callback=self.redraw)
  A.app.screen='full'
  A.app.body=self.c

 def redraw(self,rect):
  if img:
   self.c.blit(img)

 def down(self):
  if self.page*self.offset+self.cur<len(self.items)-1 and self.cur<self.offset-1:self.cur+=1
  else:
   if len(self.items)>self.page*self.offset+self.cur and self.cur==self.offset-1:
    self.page=self.page+1
    self.cur=0

 def up(self):
  if self.cur>0:
   self.cur-=1
  else:
   if self.page>0:
    self.page=self.page-1
    self.cur=self.offset-1

 def select(self):
  if self.page*self.offset+self.cur not in self.tmp:
   self.tmp.append(self.page*self.offset+self.cur)
  else:
   self.tmp.remove(self.page*self.offset+self.cur)

 def show(self):
  self.c.bind(63497,self.up)
  self.c.bind(63498,self.down)
  self.c.bind(63557,self.select)
  px,py,th=20,30,14
  while run:
   img.clear(0)
   if len(self.items)-self.page*self.offset<self.offset:mx=len(self.items)-self.page*self.offset
   else:mx=self.offset
   for index in range(0,mx):
    tc=(0xffffff,0x00ff00)[index==self.cur]
    fc=(None,0x00ff00)[self.page*self.offset+index in self.tmp]
    img.text((px,py+index*th),self.items[index+self.page*self.offset],tc,'legend')
    img.rectangle((px-15,(py+index*th)-10,px-5,py+index*th),0xdadada)
    img.rectangle((px-14,(py+index*th)-9,px-6,(py+index*th)-1),fill=fc)
   img.text((px-15,py-15),u'Pilih Item:',0xffffff,'legend')
   img.text((px-15,200),u'Halaman: (%d/%d) / Item: %d' %(self.page+1,(len(self.items)//self.offset)+1,self.page*self.offset+self.cur),0xdadada)
   self.redraw(0)
   A.e32.ao_sleep(0)

menu=[u'Item %d' %i for i in range(30)]
kk=CSelect(menu)
kk.show()