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 import events
  14 from eventutils import event_handler, EventDispatcher, EventHandlerMixin
  15 from math import floor
  16 import types
  17 from musicxml import Tone
  18
  19 from config import FRAMERATE
  20 from config import BORDER
  21 from config import FIRST_HUE
  22 from config import OFF_LUMINANCE
  23 from config import OFF_SATURATION
  24 from config import ON_TOP_LUMINANCE
  25 from config import ON_BOTTOM_LUMINANCE
  26 from config import ON_SATURATION
  27 from config import ON_COLUMN_OVERSIZING
  28 from config import ON_COLUMN_ALPHA
  29 from config import FONT
  30 from config import FONT_COLOR
  31 from config import DEFAULT_MIDI_VELOCITY
  32
  33 BACKGROUND_LAYER = 0
  34 FOREGROUND_LAYER = 1
  35 CURSOR_LAYER = 2
  36 PLAYING_MODES = {'EASY':0
  37                 ,'NORMAL':1
  38                 ,'ADVANCED':2
  39                 ,'EXPERT':3}
  40
  41 class _PlayingScreenBase(pygame.sprite.LayeredDirty, EventHandlerMixin) :
  42
  43     def __init__(self, synth, distinctNotes=[]) :
  44         """
  45         distinctNotes : notes disctinctes présentes dans la chanson
  46         triées du plus grave au plus aigu.
  47         """
  48         super(_PlayingScreenBase, self).__init__()
  49         self.synth = synth
  50         self.distinctNotes = distinctNotes
  51         self.keyboardLength = 0
  52         self.keyboardRects = []
  53         self.cursor = None
  54         self._initRects()
  55         self.columns = {}
  56         self._initColumns()
  57         self._running = False
  58         self.draw(pygame.display.get_surface())
  59         self._initCursor()
  60
  61
  62     def _initRects(self) :
  63         """ création des espaces réservés pour
  64             afficher les colonnes.
  65         """
  66         #ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  67         #if ambitus <= 12 :
  68         #    self.keyboardLength = 8
  69         #else :
  70         #    self.keyboardLength = 11
  71         self.keyboardLength = len(self.distinctNotes)
  72
  73         screen = pygame.display.get_surface()
  74
  75         # taille de la zone d'affichage utile (bordure autour)
  76         dispWidth = screen.get_width() - 2 * BORDER
  77         dispHeight = screen.get_height() - 2 * BORDER
  78
  79         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  80
  81         rects = []
  82         for i in range(self.keyboardLength) :
  83             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  84             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  85             rects.append(rect)
  86
  87         self.keyboardRects = rects
  88
  89     def _initColumns(self) :
  90
  91         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  92         for i, rect in enumerate(self.keyboardRects) :
  93             hue = FIRST_HUE - hueStep * i
  94             tone = self.distinctNotes[i]
  95             c = Column(self, hue, rect, tone)
  96             self.add(c, layer=BACKGROUND_LAYER)
  97             self.columns[tone.midi] = c
  98
  99
 100     def _initCursor(self) :
 101         self.cursor = WarpingCursor(blinkMode=True)
 102         self.add(self.cursor, layer=CURSOR_LAYER)
 103
 104     def run(self):
 105         self._running = True
 106         clock = pygame.time.Clock()
 107         pygame.display.flip()
 108         pygame.mouse.set_visible(False)
 109         while self._running :
 110             EventDispatcher.dispatchEvents()
 111             dirty = self.draw(pygame.display.get_surface())
 112             pygame.display.update(dirty)
 113             clock.tick(FRAMERATE)
 114
 115         pygame.mouse.set_visible(True)
 116         self.cursor._stopBlink()
 117
 118     @event_handler(pygame.KEYDOWN)
 119     def handleKeyDown(self, event) :
 120         if event.key == pygame.K_q:
 121             self._running = False
 122
 123
 124 class PlayingScreen(_PlayingScreenBase) :
 125     "fenêtre de jeu pour improvisation"
 126
 127     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 128
 129     def __init__(self, synth) :
 130         distinctNotes = []
 131         for midi in self.scale :
 132             tone = Tone(midi)
 133             distinctNotes.append(tone)
 134
 135         super(PlayingScreen, self).__init__(synth, distinctNotes)
 136
 137     @event_handler(events.NOTEON)
 138     def noteon(self, evt) :
 139         tone = evt.tone
 140         self.synth.noteon(0, tone.midi, DEFAULT_MIDI_VELOCITY)
 141
 142     @event_handler(events.NOTEOFF)
 143     def noteoff(self, evt) :
 144         tone = evt.tone
 145         self.synth.noteoff(0, tone.midi)
 146
 147
 148 class SongPlayingScreen(_PlayingScreenBase) :
 149
 150     def __init__(self, synth, song, mode=PLAYING_MODES['NORMAL']) :
 151         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes)
 152         self.song = song
 153         self.noteIterator = self.song.iterNotes()
 154         self.play()
 155
 156     def play(self) :
 157         note, verseIndex = self.noteIterator.next()
 158         syllabus = note.lyrics[verseIndex].syllabus()
 159         column = self.columns[note.midi]
 160         column.update(True, syllabus)
 161
 162
 163     @event_handler(events.NOTEON)
 164     def noteon(self, evt) :
 165         tone = evt.tone
 166         self.synth.noteon(0, tone.midi, DEFAULT_MIDI_VELOCITY)
 167
 168     @event_handler(events.NOTEOFF)
 169     def noteoff(self, evt) :
 170         tone = evt.tone
 171         self.synth.noteoff(0, tone.midi)
 172
 173
 174
 175 class Column(pygame.sprite.DirtySprite, EventHandlerMixin) :
 176
 177     def __init__(self, group, hue, rect, tone) :
 178         pygame.sprite.DirtySprite.__init__(self, group)
 179         self.state = False
 180
 181         # nom de l'intonation
 182         self.tone = tone
 183         toneName = FONT.render(tone.nom, True, (0,0,0))
 184
 185         # état off : surface unie et nom de l'intonation
 186         sur = pygame.surface.Surface(rect.size)
 187         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
 188         sur.fill(rgba)
 189         w, h = rect.w, rect.h
 190         tw, th, = toneName.get_size()
 191         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
 192         sur.blit(toneName, toneRect)
 193         self.surOff = sur
 194         self.rectOff = rect
 195
 196
 197         # état on : surface dégradée avec nom de la note avec largeur agrandie
 198         topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
 199         bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
 200         onWidth = rect.width * ON_COLUMN_OVERSIZING
 201         onLeft = rect.centerx - onWidth / 2
 202         rectOn = pygame.Rect((onLeft, 0),
 203                              (onWidth, rect.height))
 204         self.surOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
 205         w, h = rectOn.w, rectOn.h
 206         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
 207         self.surOn.blit(toneName, toneRect)
 208         self.rectOn = rectOn
 209
 210         self.image = self.surOff
 211         self.rect = rect
 212         #EventDispatcher.addEventListener(pygame.MOUSEBUTTONDOWN, self.onMouseDown)
 213         #EventDispatcher.addEventListener(pygame.MOUSEBUTTONUP, self.onMouseUp)
 214
 215     def update(self, state, syllabus='') :
 216         group = self.groups()[0]
 217         if state == self.state :
 218             # no changes
 219             return
 220         if state :
 221             group.change_layer(self, FOREGROUND_LAYER)
 222             sur = self.surOn
 223             if syllabus :
 224                 sur = sur.copy()
 225                 renderedSyl = FONT.render(syllabus, True, (0,0,0))
 226                 sw, sh, = renderedSyl.get_size()
 227                 w, h = self.rectOn.w, self.rectOn.h
 228                 sylRect = pygame.Rect(((w - sw) / 2, (h - sh) / 2), (sw, sh))
 229                 sur.blit(renderedSyl, sylRect)
 230
 231             self.image = sur
 232             self.rect = self.rectOn
 233         else :
 234             group.change_layer(self, BACKGROUND_LAYER)
 235             self.image = self.surOff
 236             self.rect = self.rectOff
 237         self.state = state
 238         self.dirty = 1
 239
 240     @event_handler(pygame.MOUSEBUTTONDOWN)
 241     def onMouseDown(self, event) :
 242         if self.rect.collidepoint(*event.pos) :
 243             self.update(True)
 244             self.raiseNoteOn()
 245
 246     @event_handler(pygame.MOUSEBUTTONUP)
 247     def onMouseUp(self, event) :
 248         self.update(False)
 249         self.raiseNoteOff()
 250
 251     def raiseNoteOn(self) :
 252         evt = pygame.event.Event(events.NOTEON, tone=self.tone)
 253         pygame.event.post(evt)
 254
 255     def raiseNoteOff(self) :
 256         evt = pygame.event.Event(events.NOTEOFF, tone=self.tone)
 257         pygame.event.post(evt)
 258
 259
 260
 261 def hls_to_rgba_8bits(h, l, s, a=1) :
 262     #convert to rgb ranging from 0 to 255
 263     rgba = [floor(255 * i) for i in hls_to_rgb(h, l, s) + (a,)]
 264     return tuple(rgba)