Hex Color Viewer

# Hex Color Viewer
# Joe, 29/07/2015

import appuifw as A
import graphics as G
sc=G.sysinfo.display_pixels()
img=G.Image.new(sc)

def _tsize(text,font):
 if not isinstance(text, unicode):
  text=unicode(text)
 (a,b,c)=img.measure_text(text, font=font)
 w,h=(a[2]-a[0],a[3]-a[1])
 return (w,h)

class Color:
 def __init__(self):
  self.run=0
  self.val=[48]*6
  self.hval=[48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97, 98, 99, 100, 101, 102]
  self.curx=0
  self.yy=[0]*len(self.hval)
  A.app.screen='full'
  self.can=A.Canvas(redraw_callback=self._redraw,event_callback=self._event)
  A.app.body=self.can
  A.app.menu=[]
  A.app.exit_key_handler=self.exit

 def _redraw(self,x):
  if img:self.can.blit(img)

 def _event(self,sc):
  k=sc['scancode']
  if sc['type'] is not A.EEventKey:return
  elif k==0xe: #kiri
   self.curx-=1
   if self.curx<0:
    self.curx=len(self.val)-1
  elif k==0xf: #kanan
   self.curx+=1
   if self.curx>len(self.val)-1:
    self.curx=0
  elif k==0x10: #atas
   self.yy[self.curx]+=1
   if self.yy[self.curx]>len(self.hval)-1:
    self.yy[self.curx]=0
   self.val[self.curx] = self.hval[self.yy[self.curx]]
  elif k==0x11: #bawah
   self.yy[self.curx]-=1
   if self.yy[self.curx]<0:
    self.yy[self.curx]=len(self.hval)-1
   self.val[self.curx] = self.hval[self.yy[self.curx]]

 def exit(self):
  self.run=0

 def _drawbox(self,rw,rh):
  txt,fnt='HEX COLOR VIEWER','legend'
  color=eval('0x'+''.join([chr(i) for i in self.val]))
  x,y=sc[0]/2,sc[1]/2-40
  yy=y+rh+20
  img.rectangle((x-rw,y-rh,x+rw,y+rh),0xffffff,color)
  img.text(((x-_tsize(txt,fnt)[0]/2),yy),u'%s' %txt,0xffffff,fnt)

 def _drawval(self):
  vlen=len(self.val)
  x,y,n=sc[0]/2,sc[1]-14,14
  xx=x-(((vlen-1)*14)/2)
  yy=y+8
  for i in range(vlen):
   img.text((xx+(i*n)-2,y),u'%s' %chr(self.val[i]),0xffffff,'legend')
  img.point((xx+(self.curx*n),yy),0xdd0000,width=4)

 def main(self):
  self.run=1
  while self.run:
   img.clear(0)
   self._drawbox(80,40)
   self._drawval()
   self._redraw(0)
   A.e32.ao_sleep(1e-04)

col=Color()
col.main()