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 from naja.sound import sound
   8
   9
  10 class SelectorWidget(Container):
  11     def __init__(self, *args, **kwargs):
  12         super(SelectorWidget, self).__init__(*args, **kwargs)
  13         self.position = 0
  14         self.selector = resources.get_image('bits', 'arrow_on.png',
  15                                             transforms=(R270, EIGHT_BIT))
  16
  17     def render(self, surface):
  18         super(SelectorWidget, self).render(surface)
  19         pos = self.selector.get_rect()
  20         selected = self.widgets[self.position]
  21         if not selected.is_selectable():
  22             selected = self.change_pos(1)
  23
  24         pos = pos.move(selected.pos)
  25         pos = pos.move(-pos.width * 1.5, (selected.size[1] - pos.height) / 2)
  26         surface.blit(self.selector, pos)
  27
  28     def change_pos(self, change):
  29         self.position = (self.position + change) % len(self.widgets)
  30         while not self.widgets[self.position].is_selectable():
  31             self.position = (self.position + change) % len(self.widgets)
  32         return self.widgets[self.position]
  33
  34     def handle_event(self, ev):
  35         if ev.type == pgl.KEYDOWN:
  36             if ev.key in KEYS.UP + KEYS.DOWN:
  37                 if ev.key in KEYS.DOWN:
  38                     self.change_pos(1)
  39                 else:
  40                     self.change_pos(-1)
  41                 sound.play_sound('zoop.ogg', volume=0.05)
  42                 return True
  43             elif ev.key in KEYS.SELECT:
  44                 return self.widgets[self.position].callback('click')
  45
  46         return super(SelectorWidget, self).handle_event(ev)