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 = 0 # 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         super(_PlayingScreenBase, self).__init__()
  36         self.distinctNotes = distinctNotes
  37         self.keyboardLength = 0
  38         self.keyboardRects = []
  39         self.cursor = None
  40         self._initRects()
  41         self._initColumns()
  42         self._running = False
  43         self.draw(pygame.display.get_surface())
  44         self._initCursor()
  45
  46
  47
  48     def _initRects(self) :
  49         """ création des espaces réservés pour
  50             afficher les colonnes.
  51         """
  52         ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  53         if ambitus <= 12 :
  54             self.keyboardLength = 8
  55         else :
  56             self.keyboardLength = 11
  57
  58         screen = pygame.display.get_surface()
  59
  60         # taille de la zone d'affichage utile (bordure autour)
  61         dispWidth = screen.get_width() - 2 * BORDER
  62         dispHeight = screen.get_height() - 2 * BORDER
  63
  64         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  65
  66         rects = []
  67         for i in range(self.keyboardLength) :
  68             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  69             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  70             rects.append(rect)
  71
  72         self.keyboardRects = rects
  73
  74     def _initColumns(self) :
  75
  76         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  77         for i, rect in enumerate(self.keyboardRects) :
  78             hue = FIRST_HUE - hueStep * i
  79             c = Column(hue, rect)
  80             self.add(c)
  81
  82     def _initCursor(self) :
  83         self.cursor = WarpingCursor()
  84         self.add(self.cursor)
  85
  86
  87     def highlightColumn(self, index) :
  88         for i, sprite in enumerate(self.sprites()) :
  89             sprite.update(i==index)
  90         self.draw(pygame.display.get_surface())
  91
  92     def run(self):
  93         self._running = True
  94         clock = pygame.time.Clock()
  95         pygame.display.flip()
  96         while self._running :
  97             EventDispatcher.dispatchEvents()
  98             dirty = self.draw(pygame.display.get_surface())
  99             pygame.display.update(dirty)
 100             clock.tick(50)
 101
 102     @event_handler(pygame.KEYDOWN)
 103     def handleKeyDown(self, event) :
 104         if event.key == pygame.K_q:
 105             self._running = False
 106         uni = event.unicode
 107
 108         if uni.isdigit() and int(uni) <=8 :
 109             self.highlightColumn(int(uni))
 110
 111     @event_handler(pygame.MOUSEMOTION)
 112     def handleMouseMotion(self, event) :
 113         pass
 114
 115
 116
 117
 118 class SongPlayingScreen(_PlayingScreenBase) :
 119
 120     def __init__(self, song) :
 121         super(SongPlayingScreen, self).__init__(song.distinctNotes)
 122         self.song = song
 123
 124 class SongPlayingScreenTest(_PlayingScreenBase) :
 125     def __init__(self) :
 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)