src/app/widgets/playingscreen.py

   1 # -*- coding: utf-8 -*-
   2 """
   3 Écran de jeu MinWii :
   4 bandes arc-en-ciel représentant un clavier.
   5
   6 $Id$
   7 $URL$
   8 """
   9 import pygame
  10 from colorsys import hls_to_rgb
  11 from gradients import gradients
  12 # TODO : positionner cette constance en fonction de la résolution d'affichage
  13 # externaliser la conf.
  14 BORDER = 5 # 5px
  15 FIRST_HUE = 0.6
  16 OFF_LUMINANCE = 0.1
  17 OFF_SATURATION = 1
  18 ON_TOP_LUMINANCE = 0.9
  19 ON_BOTTOM_LUMINANCE = 0.6
  20 ON_SATURATION = 1
  21
  22 class _PlayingScreenBase(object) :
  23     def __init__(self, distinctNotes=[]) :
  24         """
  25         distinctNotes : notes disctinctes présentes dans la chanson
  26         triées du plus grave au plus aigu.
  27         """
  28         self.distinctNotes = distinctNotes
  29         self.keyboardLength = 0
  30         self.keyboardRects = []
  31         self._initRects()
  32         self.drawColumns()
  33
  34
  35     def _initRects(self) :
  36         """ création des espaces réservés pour
  37             afficher les colonnes.
  38         """
  39         ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  40         if ambitus <= 12 :
  41             self.keyboardLength = 8
  42         else :
  43             self.keyboardLength = 11
  44
  45         screen = pygame.display.get_surface()
  46
  47         # taille de la zone d'affichage utile (bordure autour)
  48         dispWidth = screen.get_width() - 2 * BORDER
  49         dispHeight = screen.get_height() - 2 * BORDER
  50
  51         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  52
  53         rects = []
  54         for i in range(self.keyboardLength) :
  55             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  56             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  57             rects.append(rect)
  58
  59         self.keyboardRects = rects
  60
  61     def _initColumns(self) :
  62
  63         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  64         for i, rect in enumerate(self.keyboardRects) :
  65             hue = FIRST_HUE - hueStep * i
  66             c = Column(hue)
  67
  68
  69     def drawColumns(self) :
  70         pass
  71
  72     def highLightColumn(self) :
  73         pass
  74
  75
  76 class SongPlayingScreen(_PlayingScreenBase) :
  77
  78     def __init__(self, song) :
  79         super(SongPlayingScreen, self).__init__(song.distinctNotes)
  80         self.song = song
  81
  82
  83
  84 class Column(pygame.sprite.Sprite) :
  85
  86     def __init__(self, hue, rect) :
  87         pygame.sprite.Sprite.__init__(self)
  88         sur = Surface(rect.size)
  89         rgba = hls_to_rgb(hue, OFF_LUMINANCE, OFF_SATURATION) + (255,)
  90         sur.fill(rgba)
  91         self.stateOff = sur
  92
  93         topRgba = hls_to_rgb(hue, ON_TOP_LUMINANCE, ON_SATURATION) + (255,)
  94         bottomRgba = hls_to_rgb(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION) + (255,)
  95         size = rect.inflate(2*rect.width,0).size
  96         self.stateOn = gradients.vertical(size, topRgba, bottomRgba)
  97