naja/widgets/selector.py

   1 import pygame.locals as pgl
   2
   3 from naja.constants import KEYS
   4 from naja.widgets.base import Container
   5 from naja.resources import resources
   6 from naja.resources.mutators import EIGHT_BIT, R270
   7
   8
   9 class SelectorWidget(Container):
  10     def __init__(self, *args, **kwargs):
  11         super(SelectorWidget, self).__init__(*args, **kwargs)
  12         self.position = 0
  13         self.selector = resources.get_image('bits', 'arrow_on.png',
  14                                             transforms=(R270, EIGHT_BIT))
  15
  16     def render(self, surface):
  17         super(SelectorWidget, self).render(surface)
  18         pos = self.selector.get_rect()
  19         selected = self.widgets[self.position]
  20         pos = pos.move(selected.pos)
  21         pos = pos.move(-pos.width * 1.5, (selected.size[1] - pos.height) / 2)
  22         surface.blit(self.selector, pos)
  23
  24     def handle_event(self, ev):
  25         if ev.type == pgl.KEYDOWN:
  26             if ev.key in KEYS.UP + KEYS.DOWN:
  27                 if ev.key in KEYS.DOWN:
  28                     self.position += 1
  29                 else:
  30                     self.position -= 1
  31                 self.position %= len(self.widgets)
  32                 return True
  33             elif ev.key in KEYS.SELECT:
  34                 return self.widgets[self.position].callback('click')
  35
  36         return super(SelectorWidget, self).handle_event(ev)