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 events import TIMEOUT
  13 from itertools import cycle
  14
  15 class WarpingCursor(pygame.sprite.Sprite, EventHandlerMixin):
  16     '''
  17     The class for animating the warping cursor
  18     '''
  19
  20     @staticmethod
  21     def _get_theme_images(name) :
  22         basePath = os.path.abspath(__file__).split(os.path.sep)[:-1]
  23         basePath.append('data')
  24         basePath.append(name)
  25         basePath = os.path.sep.join(basePath)
  26         images = [f for f in os.listdir(basePath) if os.path.splitext(f)[1] == '.png']
  27         return basePath, images
  28
  29
  30     def __init__(self, theme='black', duration=50, blinkMode=True):
  31         pygame.sprite.Sprite.__init__(self)
  32         pygame.mouse.set_visible(False)
  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((-self.width/2,-self.height/2), (self.width, self.height))
  52
  53         self.blinkMode = blinkMode
  54         self._startBlink()
  55
  56     def _startBlink(self) :
  57         if self.blinkMode :
  58             self._blinking = True
  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._blinking :
  69             self.image = self.iterator.next()
  70
  71     @event_handler(pygame.MOUSEBUTTONDOWN)
  72     def flashOn(self, event) :
  73         self._blinking = False
  74         self.image = self.flashImage
  75
  76     @event_handler(pygame.MOUSEBUTTONUP)
  77     def flashOff(self, event) :
  78         if self.blinkMode :
  79             self._blinking = True
  80             self.loadNext(event)
  81         else :
  82             self.image = self.images[0]
  83
  84     @event_handler(pygame.MOUSEMOTION)
  85     def move(self, event) :
  86         self.rect.move_ip(event.rel)