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 from math import floor
  13 # TODO : positionner cette constance en fonction de la résolution d'affichage
  14 # externaliser la conf.
  15 BORDER = 5 # 5px
  16 FIRST_HUE = 0.6
  17 OFF_LUMINANCE = 0.1
  18 OFF_SATURATION = 1
  19 ON_TOP_LUMINANCE = 0.6
  20 ON_BOTTOM_LUMINANCE = 0.9
  21 ON_SATURATION = 1
  22
  23 class _PlayingScreenBase(pygame.sprite.OrderedUpdates) :
  24     def __init__(self, distinctNotes=[]) :
  25         """
  26         distinctNotes : notes disctinctes présentes dans la chanson
  27         triées du plus grave au plus aigu.
  28         """
  29         super(_PlayingScreenBase, self).__init__()
  30         self.distinctNotes = distinctNotes
  31         self.keyboardLength = 0
  32         self.keyboardRects = []
  33         self._initRects()
  34         self._initColumns()
  35
  36
  37
  38     def _initRects(self) :
  39         """ création des espaces réservés pour
  40             afficher les colonnes.
  41         """
  42         ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  43         if ambitus <= 12 :
  44             self.keyboardLength = 8
  45         else :
  46             self.keyboardLength = 11
  47
  48         screen = pygame.display.get_surface()
  49
  50         # taille de la zone d'affichage utile (bordure autour)
  51         dispWidth = screen.get_width() - 2 * BORDER
  52         dispHeight = screen.get_height() - 2 * BORDER
  53
  54         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  55
  56         rects = []
  57         for i in range(self.keyboardLength) :
  58             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  59             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  60             rects.append(rect)
  61
  62         self.keyboardRects = rects
  63
  64     def _initColumns(self) :
  65
  66         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  67         for i, rect in enumerate(self.keyboardRects) :
  68             hue = FIRST_HUE - hueStep * i
  69             c = Column(hue, rect)
  70             self.add(c)
  71
  72
  73     def highlightColumn(self, index) :
  74         for i, sprite in enumerate(self.sprites()) :
  75             sprite.update(i==index)
  76         self.draw(pygame.display.get_surface())
  77
  78
  79
  80 class SongPlayingScreen(_PlayingScreenBase) :
  81
  82     def __init__(self, song) :
  83         super(SongPlayingScreen, self).__init__(song.distinctNotes)
  84         self.song = song
  85
  86 class SongPlayingScreenTest(_PlayingScreenBase) :
  87     def __init__(self) :
  88         class C:pass
  89         o = C()
  90         o.midi=1
  91         super(SongPlayingScreenTest, self).__init__([o])
  92         self.__running = True
  93         #pygame.display.flip()
  94         #raw_input('allez ?')
  95
  96     def run(self):
  97         while self.__running :
  98             pygame.display.flip()
  99             events = pygame.event.get()
 100             for event in events:
 101                 self.input(event)
 102
 103     def input(self, event) :
 104         if event.type == pygame.KEYDOWN:
 105             if event.key == pygame.K_q:
 106                 self.__running = False
 107             uni = event.unicode
 108             if uni.isdigit() and int(uni) <=8 :
 109                 self.highlightColumn(int(uni))
 110
 111
 112             # if event.key == pygame.K_i:
 113             #     self.backToInstrumentChoice = True
 114             #     self.done = True
 115             #
 116             # if event.key == pygame.K_w:
 117             #     self.nextLevel = 0
 118             #     self.done = True
 119             #
 120             # if event.key == pygame.K_e:
 121             #     self.nextLevel = 1
 122             #     self.done = True
 123             #
 124             # if event.key == pygame.K_r:
 125             #     self.nextLevel = 2
 126             #     self.done = True
 127             #
 128             # if event.key == pygame.K_t:
 129             #     self.nextLevel = 3
 130             #     self.done = True
 131
 132
 133 class Column(pygame.sprite.Sprite) :
 134
 135     def __init__(self, hue, rect) :
 136         pygame.sprite.Sprite.__init__(self)
 137         sur = pygame.surface.Surface(rect.size)
 138         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
 139         sur.fill(rgba)
 140         self.stateOff = sur
 141
 142         topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION)
 143         bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION)
 144         size = rect.inflate(2*rect.width,0).size
 145         self.stateOn = gradients.vertical(size, topRgba, bottomRgba)
 146
 147         self.image = self.stateOff
 148         self.rect = rect
 149
 150     def update(self, state) :
 151         if state :
 152             self.image = self.stateOn
 153         else :
 154             self.image = self.stateOff
 155
 156 def hls_to_rgba_8bits(h, l, s) :
 157     #convert to rgb ranging from 0 to 255
 158     rgba = [floor(255 * i) for i in hls_to_rgb(h, l, s) + (1,)]
 159     return tuple(rgba)
 160