src/app/widgets/cursors.py

   1 # -*- coding: utf-8 -*-
   2 """
   3 Curseurs winwii
   4
   5 $Id$
   6 $URL$
   7 """
   8
   9 import pygame
  10 import os
  11 from eventutils import EventHandlerMixin, event_handler
  12 from itertools import cycle
  13 from pygame.locals import MOUSEBUTTONDOWN, MOUSEBUTTONUP, USEREVENT
  14 TIMEOUT = USEREVENT + 1
  15
  16 class WarpingCursor(pygame.sprite.Sprite, EventHandlerMixin):
  17     '''
  18     The class for animating the warping cursor
  19     '''
  20
  21     @staticmethod
  22     def _get_theme_images(name) :
  23         basePath = os.path.abspath(__file__).split(os.path.sep)[:-1]
  24         basePath.append('data')
  25         basePath.append(name)
  26         basePath = os.path.sep.join(basePath)
  27         images = [f for f in os.listdir(basePath) if os.path.splitext(f)[1] == '.png']
  28         return basePath, images
  29
  30
  31     def __init__(self, theme='black', duration=75, blink=True):
  32         pygame.sprite.Sprite.__init__(self)
  33         imagesPath, images = WarpingCursor._get_theme_images(theme)
  34         flashImage = images.pop(images.index('flash.png'))
  35         flashImagePath = os.path.sep.join([imagesPath, flashImage])
  36         self.flashImage = pygame.image.load(flashImagePath).convert_alpha()
  37         images.sort(lambda a, b : cmp(*[int(os.path.splitext(f)[0]) for f in [a, b]]))
  38
  39         self.images = []
  40         for img in images :
  41             imagePath = os.path.sep.join([imagesPath, img])
  42             img = pygame.image.load(imagePath).convert_alpha()
  43             self.images.append(img)
  44
  45         # assumes that all images have same dimensions
  46         self.width = self.images[0].get_width()
  47         self.height = self.images[0].get_height()
  48         self.duration = duration
  49
  50         self.image = self.images[0]
  51         self.rect = pygame.Rect((0,0), (self.width, self.height))
  52         self.update()
  53
  54         self.blink = blink
  55         if blink :
  56             self._startBlink()
  57
  58     def _startBlink(self) :
  59         pygame.time.set_timer(TIMEOUT, self.duration)
  60         self.iterator = self.iterImages()
  61
  62     def iterImages(self) :
  63         for img in cycle(self.images) :
  64             yield img
  65
  66     @event_handler(TIMEOUT)
  67     def loadNext(self, event) :
  68         if self.blink :
  69             self.image = self.iterator.next()
  70             self.update()
  71
  72     @event_handler(MOUSEBUTTONDOWN)
  73     def flashOn(self, event) :
  74         self.blink=False
  75         self.image = self.flashImage
  76         self.update()
  77
  78     @event_handler(MOUSEBUTTONUP)
  79     def flashOff(self, event) :
  80         self.blink = True
  81         self.loadNext(event)
  82
  83     def update(self) :
  84         surface = pygame.display.get_surface()
  85         surface.blit(self.image, self.rect)