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 from musicxml import Tone
  17
  18 from config import BORDER
  19 from config import FIRST_HUE
  20 from config import OFF_LUMINANCE
  21 from config import OFF_SATURATION
  22 from config import ON_TOP_LUMINANCE
  23 from config import ON_BOTTOM_LUMINANCE
  24 from config import ON_SATURATION
  25 from config import ON_COLUMN_OVERSIZING
  26 from config import ON_COLUMN_ALPHA
  27 from config import FONT
  28 from config import FONT_COLOR
  29
  30 class _PlayingScreenBase(pygame.sprite.LayeredUpdates, EventHandlerMixin) :
  31
  32     def __init__(self, distinctNotes=[]) :
  33         """
  34         distinctNotes : notes disctinctes présentes dans la chanson
  35         triées du plus grave au plus aigu.
  36         """
  37         super(_PlayingScreenBase, self).__init__()
  38         self.distinctNotes = distinctNotes
  39         self.keyboardLength = 0
  40         self.keyboardRects = []
  41         self.cursor = None
  42         self._initRects()
  43         self._initColumns()
  44         self._running = False
  45         self.draw(pygame.display.get_surface())
  46         self._initCursor()
  47
  48
  49
  50     def _initRects(self) :
  51         """ création des espaces réservés pour
  52             afficher les colonnes.
  53         """
  54         ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  55         if ambitus <= 12 :
  56             self.keyboardLength = 8
  57         else :
  58             self.keyboardLength = 11
  59
  60         screen = pygame.display.get_surface()
  61
  62         # taille de la zone d'affichage utile (bordure autour)
  63         dispWidth = screen.get_width() - 2 * BORDER
  64         dispHeight = screen.get_height() - 2 * BORDER
  65
  66         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  67
  68         rects = []
  69         for i in range(self.keyboardLength) :
  70             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  71             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  72             rects.append(rect)
  73
  74         self.keyboardRects = rects
  75
  76     def _initColumns(self) :
  77
  78         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  79         for i, rect in enumerate(self.keyboardRects) :
  80             hue = FIRST_HUE - hueStep * i
  81             tone = self.distinctNotes[i]
  82             c = Column(self, hue, rect, tone)
  83             self.add(c, layer=0)
  84
  85     def _initCursor(self) :
  86         self.cursor = WarpingCursor(blinkMode=True)
  87         self.add(self.cursor, layer=2)
  88
  89     def run(self):
  90         self._running = True
  91         clock = pygame.time.Clock()
  92         pygame.display.flip()
  93         while self._running :
  94             EventDispatcher.dispatchEvents()
  95             dirty = self.draw(pygame.display.get_surface())
  96             pygame.display.update(dirty)
  97             clock.tick(50)
  98
  99     @event_handler(pygame.KEYDOWN)
 100     def handleKeyDown(self, event) :
 101         if event.key == pygame.K_q:
 102             self._running = False
 103
 104
 105     @event_handler(pygame.MOUSEMOTION)
 106     def handleMouseMotion(self, event) :
 107         pass
 108
 109
 110 class PlayingScreen(_PlayingScreenBase) :
 111     "fenêtre de jeu pour improvisation"
 112     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 113
 114     def __init__(self) :
 115         distinctNotes = []
 116         for midi in self.scale :
 117             tone = Tone(midi)
 118             distinctNotes.append(tone)
 119
 120         super(PlayingScreen, self).__init__(distinctNotes)
 121
 122
 123 class SongPlayingScreen(_PlayingScreenBase) :
 124
 125     def __init__(self, song) :
 126         super(SongPlayingScreen, self).__init__(song.distinctNotes)
 127         self.song = song
 128
 129 class SongPlayingScreenTest(_PlayingScreenBase) :
 130     def __init__(self) :
 131         class C:pass
 132         o = C()
 133         o.midi=1
 134         super(SongPlayingScreenTest, self).__init__([o])
 135
 136
 137 class Column(pygame.sprite.Sprite, EventHandlerMixin) :
 138
 139     def __init__(self, group, hue, rect, tone) :
 140         pygame.sprite.Sprite.__init__(self, group)
 141         sur = pygame.surface.Surface(rect.size)
 142         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
 143         sur.fill(rgba)
 144         self.stateOff = sur
 145         self.rectOff = rect
 146
 147         topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
 148         bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
 149         onWidth = rect.width * ON_COLUMN_OVERSIZING
 150         onLeft = rect.centerx - onWidth / 2
 151         rectOn = pygame.Rect((onLeft, 0),
 152                              (onWidth, rect.height))
 153         self.stateOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
 154         self.rectOn = rectOn
 155
 156         self.image = self.stateOff
 157         self.rect = rect
 158         self.toneName = FONT.render(tone.nom, True, (0,0,0))
 159
 160     def update(self, state) :
 161         group = self.groups()[0]
 162         if state :
 163             group.change_layer(self, 1)
 164             self.image = self.stateOn
 165             self.rect = self.rectOn
 166         else :
 167             group.change_layer(self, 0)
 168             self.image = self.stateOff
 169             self.rect = self.rectOff
 170
 171     @event_handler(pygame.MOUSEBUTTONDOWN)
 172     def onMouseDown(self, event) :
 173         if self.rect.collidepoint(*event.pos) :
 174             self.update(True)
 175
 176     @event_handler(pygame.MOUSEBUTTONUP)
 177     def onMouseUp(self, event) :
 178         self.update(False)
 179
 180     def raiseNoteOn(self) :
 181         pass
 182
 183     def raiseNoteOff(self) :
 184         pass
 185
 186
 187
 188 def hls_to_rgba_8bits(h, l, s, a=1) :
 189     #convert to rgb ranging from 0 to 255
 190     rgba = [floor(255 * i) for i in hls_to_rgb(h, l, s) + (a,)]
 191     return tuple(rgba)