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 cursors import WarpingCursor
  13 from eventutils import event_handler, EventDispatcher, EventHandlerMixin
  14 from math import floor
  15 import types
  16 # TODO : positionner cette constance en fonction de la résolution d'affichage
  17 # externaliser la conf.
  18 BORDER = 5 # 5px
  19 FIRST_HUE = 0.6
  20 OFF_LUMINANCE = 0.2
  21 OFF_SATURATION = 1
  22 ON_TOP_LUMINANCE = 0.6
  23 ON_BOTTOM_LUMINANCE = 0.9
  24 ON_SATURATION = 1
  25 ON_COLUMN_OVERSIZING = 1.5
  26
  27
  28 class _PlayingScreenBase(pygame.sprite.OrderedUpdates, EventHandlerMixin) :
  29
  30     def __init__(self, distinctNotes=[]) :
  31         """
  32         distinctNotes : notes disctinctes présentes dans la chanson
  33         triées du plus grave au plus aigu.
  34         """
  35         print '__init__ _PlayingScreenBase'
  36         super(_PlayingScreenBase, self).__init__()
  37         self.distinctNotes = distinctNotes
  38         self.keyboardLength = 0
  39         self.keyboardRects = []
  40         self.cursor = None
  41         self._initRects()
  42         self._initColumns()
  43         self._running = False
  44         self.draw(pygame.display.get_surface())
  45         self._initCursor()
  46
  47
  48
  49     def _initRects(self) :
  50         """ création des espaces réservés pour
  51             afficher les colonnes.
  52         """
  53         ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  54         if ambitus <= 12 :
  55             self.keyboardLength = 8
  56         else :
  57             self.keyboardLength = 11
  58
  59         screen = pygame.display.get_surface()
  60
  61         # taille de la zone d'affichage utile (bordure autour)
  62         dispWidth = screen.get_width() - 2 * BORDER
  63         dispHeight = screen.get_height() - 2 * BORDER
  64
  65         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  66
  67         rects = []
  68         for i in range(self.keyboardLength) :
  69             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  70             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  71             rects.append(rect)
  72
  73         self.keyboardRects = rects
  74
  75     def _initColumns(self) :
  76
  77         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  78         for i, rect in enumerate(self.keyboardRects) :
  79             hue = FIRST_HUE - hueStep * i
  80             c = Column(hue, rect)
  81             self.add(c)
  82
  83     def _initCursor(self) :
  84         self.cursor = WarpingCursor()
  85         #self.add(self.cursor)
  86
  87
  88     def highlightColumn(self, index) :
  89         for i, sprite in enumerate(self.sprites()) :
  90             sprite.update(i==index)
  91         self.draw(pygame.display.get_surface())
  92
  93     def run(self):
  94         self._running = True
  95         clock = pygame.time.Clock()
  96         while self._running :
  97             pygame.display.flip()
  98             EventDispatcher.dispatchEvents()
  99             clock.tick(50)
 100
 101     @event_handler(pygame.KEYDOWN)
 102     def handleKeyDown(self, event) :
 103         if event.key == pygame.K_q:
 104             self._running = False
 105         uni = event.unicode
 106
 107         if uni.isdigit() and int(uni) <=8 :
 108             self.highlightColumn(int(uni))
 109
 110     @event_handler(pygame.MOUSEMOTION)
 111     def handleMouseMotion(self, event) :
 112         pass
 113
 114
 115
 116
 117 class SongPlayingScreen(_PlayingScreenBase) :
 118
 119     def __init__(self, song) :
 120         super(SongPlayingScreen, self).__init__(song.distinctNotes)
 121         self.song = song
 122
 123 class SongPlayingScreenTest(_PlayingScreenBase) :
 124     def __init__(self) :
 125         print '__init__ SongPlayingScreenTest'
 126         class C:pass
 127         o = C()
 128         o.midi=1
 129         super(SongPlayingScreenTest, self).__init__([o])
 130
 131
 132 class Column(pygame.sprite.Sprite) :
 133
 134     def __init__(self, hue, rect) :
 135         pygame.sprite.Sprite.__init__(self)
 136         sur = pygame.surface.Surface(rect.size)
 137         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
 138         sur.fill(rgba)
 139         self.stateOff = sur
 140         self.rectOff = rect
 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         rectOn = rect.inflate(ON_COLUMN_OVERSIZING * rect.width, 0)
 145         self.stateOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
 146         self.rectOn = rectOn
 147
 148         self.image = self.stateOff
 149         self.rect = rect
 150
 151     def update(self, state) :
 152         if state :
 153             self.image = self.stateOn
 154             self.rect = self.rectOn
 155         else :
 156             self.image = self.stateOff
 157             self.rect = self.rectOff
 158
 159 def hls_to_rgba_8bits(h, l, s) :
 160     #convert to rgb ranging from 0 to 255
 161     rgba = [floor(255 * i) for i in hls_to_rgb(h, l, s) + (1,)]
 162     return tuple(rgba)