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 FRAMERATE
  19 from config import BORDER
  20 from config import FIRST_HUE
  21 from config import OFF_LUMINANCE
  22 from config import OFF_SATURATION
  23 from config import ON_TOP_LUMINANCE
  24 from config import ON_BOTTOM_LUMINANCE
  25 from config import ON_SATURATION
  26 from config import ON_COLUMN_OVERSIZING
  27 from config import ON_COLUMN_ALPHA
  28 from config import FONT
  29 from config import FONT_COLOR
  30
  31 class _PlayingScreenBase(pygame.sprite.LayeredDirty, EventHandlerMixin) :
  32
  33     def __init__(self, distinctNotes=[]) :
  34         """
  35         distinctNotes : notes disctinctes présentes dans la chanson
  36         triées du plus grave au plus aigu.
  37         """
  38         super(_PlayingScreenBase, self).__init__()
  39         self.distinctNotes = distinctNotes
  40         self.keyboardLength = 0
  41         self.keyboardRects = []
  42         self.cursor = None
  43         self._initRects()
  44         self._initColumns()
  45         self._running = False
  46         self.draw(pygame.display.get_surface())
  47         self._initCursor()
  48
  49
  50
  51     def _initRects(self) :
  52         """ création des espaces réservés pour
  53             afficher les colonnes.
  54         """
  55         ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  56         if ambitus <= 12 :
  57             self.keyboardLength = 8
  58         else :
  59             self.keyboardLength = 11
  60
  61         screen = pygame.display.get_surface()
  62
  63         # taille de la zone d'affichage utile (bordure autour)
  64         dispWidth = screen.get_width() - 2 * BORDER
  65         dispHeight = screen.get_height() - 2 * BORDER
  66
  67         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  68
  69         rects = []
  70         for i in range(self.keyboardLength) :
  71             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  72             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  73             rects.append(rect)
  74
  75         self.keyboardRects = rects
  76
  77     def _initColumns(self) :
  78
  79         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  80         for i, rect in enumerate(self.keyboardRects) :
  81             hue = FIRST_HUE - hueStep * i
  82             tone = self.distinctNotes[i]
  83             c = Column(self, hue, rect, tone)
  84             self.add(c, layer=0)
  85
  86     def _initCursor(self) :
  87         self.cursor = WarpingCursor(blinkMode=True)
  88         self.add(self.cursor, layer=2)
  89
  90     def run(self):
  91         self._running = True
  92         clock = pygame.time.Clock()
  93         pygame.display.flip()
  94         while self._running :
  95             EventDispatcher.dispatchEvents()
  96             dirty = self.draw(pygame.display.get_surface())
  97             pygame.display.update(dirty)
  98             clock.tick(FRAMERATE)
  99
 100     @event_handler(pygame.KEYDOWN)
 101     def handleKeyDown(self, event) :
 102         if event.key == pygame.K_q:
 103             self._running = False
 104
 105
 106     @event_handler(pygame.MOUSEMOTION)
 107     def handleMouseMotion(self, event) :
 108         pass
 109
 110
 111 class PlayingScreen(_PlayingScreenBase) :
 112     "fenêtre de jeu pour improvisation"
 113     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 114
 115     def __init__(self) :
 116         distinctNotes = []
 117         for midi in self.scale :
 118             tone = Tone(midi)
 119             distinctNotes.append(tone)
 120
 121         super(PlayingScreen, self).__init__(distinctNotes)
 122
 123
 124 class SongPlayingScreen(_PlayingScreenBase) :
 125
 126     def __init__(self, song) :
 127         super(SongPlayingScreen, self).__init__(song.distinctNotes)
 128         self.song = song
 129
 130 class SongPlayingScreenTest(_PlayingScreenBase) :
 131     def __init__(self) :
 132         class C:pass
 133         o = C()
 134         o.midi=1
 135         super(SongPlayingScreenTest, self).__init__([o])
 136
 137
 138 class Column(pygame.sprite.DirtySprite, EventHandlerMixin) :
 139
 140     def __init__(self, group, hue, rect, tone) :
 141         pygame.sprite.DirtySprite.__init__(self, group)
 142
 143         toneName = FONT.render(tone.nom, True, (0,0,0))
 144         sur = pygame.surface.Surface(rect.size)
 145         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
 146         sur.fill(rgba)
 147         w, h = rect.w, rect.h
 148         tw, th, = toneName.get_size()
 149         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
 150         sur.blit(toneName, toneRect)
 151         self.stateOff = sur
 152         self.rectOff = rect
 153
 154         topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
 155         bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
 156         onWidth = rect.width * ON_COLUMN_OVERSIZING
 157         onLeft = rect.centerx - onWidth / 2
 158         rectOn = pygame.Rect((onLeft, 0),
 159                              (onWidth, rect.height))
 160         self.stateOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
 161         w, h = rectOn.w, rectOn.h
 162         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
 163         self.stateOn.blit(toneName, toneRect)
 164         self.rectOn = rectOn
 165
 166         self.image = self.stateOff
 167         self.rect = rect
 168
 169     def update(self, state) :
 170         group = self.groups()[0]
 171         if state :
 172             group.change_layer(self, 1)
 173             self.image = self.stateOn
 174             self.rect = self.rectOn
 175         else :
 176             group.change_layer(self, 0)
 177             self.image = self.stateOff
 178             self.rect = self.rectOff
 179
 180     @event_handler(pygame.MOUSEBUTTONDOWN)
 181     def onMouseDown(self, event) :
 182         if self.rect.collidepoint(*event.pos) :
 183             self.update(True)
 184
 185     @event_handler(pygame.MOUSEBUTTONUP)
 186     def onMouseUp(self, event) :
 187         self.update(False)
 188
 189     def raiseNoteOn(self) :
 190         pass
 191
 192     def raiseNoteOff(self) :
 193         pass
 194
 195
 196
 197 def hls_to_rgba_8bits(h, l, s, a=1) :
 198     #convert to rgb ranging from 0 to 255
 199     rgba = [floor(255 * i) for i in hls_to_rgb(h, l, s) + (a,)]
 200     return tuple(rgba)