src/minwii/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 import types
  11
  12 import minwii.events as events
  13 from minwii.log import eventLogger
  14 from minwii.eventutils import event_handler, EventDispatcher, EventHandlerMixin
  15 from minwii.musicxml import Tone
  16 from minwii.config import FRAMERATE
  17 from minwii.config import FIRST_HUE
  18 from minwii.config import MIDI_VELOCITY_RANGE
  19 from minwii.config import MIDI_PAN_RANGE
  20 from minwii.config import MIDI_VELOCITY_WRONG_NOTE_ATTN
  21 from minwii.globals import BACKGROUND_LAYER
  22 from minwii.globals import CURSOR_LAYER
  23 from minwii.globals import PLAYING_MODES_DICT
  24
  25 from cursors import WarpingCursor
  26 from column import Column
  27
  28 class PlayingScreenBase(pygame.sprite.LayeredDirty, EventHandlerMixin) :
  29
  30     def __init__(self, synth, 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.synth = synth
  37         self.distinctNotes = distinctNotes
  38         self.keyboardLength = 0
  39         self.keyboardRects = []
  40         self.cursor = None
  41         self._initRects()
  42         self.columns = {}
  43         self._initColumns()
  44         self._running = False
  45         self.draw(pygame.display.get_surface())
  46         self._initCursor()
  47
  48     def _initRects(self) :
  49         """ création des espaces réservés pour
  50             afficher les colonnes.
  51         """
  52         self.keyboardLength = len(self.distinctNotes)
  53
  54         screen = pygame.display.get_surface()
  55
  56         self.dispWidth  = dispWidth = screen.get_width()
  57         self.dispHeight = dispHeight = screen.get_height()
  58
  59         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  60
  61         rects = []
  62         for i in range(self.keyboardLength - 1) :
  63             upperLeftCorner = (i*columnWidth, 0)
  64             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  65             rects.append(rect)
  66
  67         # la dernière colonne à la largeur du reste
  68         upperLeftCorner = ((i+1) * columnWidth, 0)
  69         rect = pygame.Rect(upperLeftCorner, (dispWidth - (self.keyboardLength - 1) * 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             tone = self.distinctNotes[i]
  80             c = Column(self, i, hue, rect, tone)
  81             self.add(c, layer=BACKGROUND_LAYER)
  82             self.columns[tone.midi] = c
  83
  84
  85     def _initCursor(self) :
  86         self.cursor = WarpingCursor(blinkMode=True)
  87         self.add(self.cursor, layer=CURSOR_LAYER)
  88
  89     def run(self):
  90         self._running = True
  91         clock = pygame.time.Clock()
  92         pygame.display.flip()
  93         pygame.mouse.set_visible(False)
  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     def stop(self) :
 101         self._running = False
 102         self.synth.system_reset()
 103         pygame.mouse.set_visible(True)
 104         self.cursor._stopBlink()
 105
 106     @event_handler(pygame.KEYDOWN)
 107     def handleKeyDown(self, event) :
 108         if event.key == pygame.K_q or \
 109             event.unicode == u'q' or \
 110             pygame.K_ESCAPE:
 111             self.stop()
 112
 113     @event_handler(pygame.MOUSEBUTTONDOWN)
 114     def onMouseDown(self, event) :
 115         # TODO à cleaner : on vire le dernier élément
 116         # parce qu'il s'agit du curseur
 117         for col in reversed(self.sprites()[:-1]) :
 118             if col.rect.collidepoint(*event.pos):
 119                 self.raiseColDown(col, event)
 120                 break
 121
 122     @event_handler(pygame.MOUSEBUTTONUP)
 123     def onMouseUp(self, event) :
 124         for col in reversed(self.sprites()[:-1]) :
 125             if col.rect.collidepoint(*event.pos) :
 126                 self.raiseColUp(col, event)
 127                 break
 128
 129     @event_handler(pygame.MOUSEMOTION)
 130     def onMouseMove(self, event) :
 131         for col in reversed(self.sprites()[:-1]) :
 132             if col.rect.collidepoint(*event.pos) :
 133                 self.raiseColOver(col, event)
 134                 break
 135
 136     def raiseColDown(self, col, mouseEvent) :
 137         evt = pygame.event.Event(events.COLDOWN, column=col, pos=mouseEvent.pos)
 138         pygame.event.post(evt)
 139
 140     def raiseColUp(self, col, mouseEvent) :
 141         evt = pygame.event.Event(events.COLUP, column=col, pos=mouseEvent.pos)
 142         pygame.event.post(evt)
 143
 144     def raiseColOver(self, col, mouseEvent) :
 145         evt = pygame.event.Event(events.COLOVER, column=col, pos=mouseEvent.pos, mouseEvent=mouseEvent)
 146         pygame.event.post(evt)
 147
 148     def getVelocity(self, pos) :
 149         vel = (float(self.dispWidth) - pos[1]) / self.dispWidth
 150         vel = int(vel * (MIDI_VELOCITY_RANGE[1] - MIDI_VELOCITY_RANGE[0])) + MIDI_VELOCITY_RANGE[0]
 151         return vel
 152
 153     def getPan(self, index) :
 154         pan = float(index) / (self.keyboardLength -1)
 155         pan = int(pan * (MIDI_PAN_RANGE[1] - MIDI_PAN_RANGE[0])) + MIDI_PAN_RANGE[0]
 156         return pan
 157
 158     def playnote(self, col, pos, vel=None) :
 159         pan = self.getPan(col.index)
 160         self.synth.cc(0, 10, pan)
 161         vel = vel or self.getVelocity(pos)
 162         self.synth.noteon(0, col.tone.midi, vel)
 163
 164 class PlayingScreen(PlayingScreenBase) :
 165     "fenêtre de jeu pour improvisation"
 166
 167     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 168
 169     def __init__(self, synth) :
 170         distinctNotes = []
 171         self.currentColumn = None
 172         for midi in self.scale :
 173             tone = Tone(midi)
 174             distinctNotes.append(tone)
 175
 176         super(PlayingScreen, self).__init__(synth, distinctNotes)
 177
 178     @event_handler(events.COLDOWN)
 179     def noteon(self, event) :
 180         col = event.column
 181         col.update(True)
 182         self.currentColumn = col
 183         self.playnote(col, event.pos)
 184
 185     @event_handler(events.COLUP)
 186     def noteoff(self, event) :
 187         if self.currentColumn :
 188             self.currentColumn.update(False)
 189             self.synth.noteoff(0, self.currentColumn.tone.midi)
 190
 191
 192 class SongPlayingScreen(PlayingScreenBase) :
 193
 194     def __init__(self, synth, song, mode=PLAYING_MODES_DICT['NORMAL'], tempoTrim=0) :
 195         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes)
 196         self.song = song
 197         self.quarterNoteDuration = song.quarterNoteDuration
 198         self.tempoTrim = tempoTrim
 199         self.currentColumn = None
 200         self.noteIterator = self.song.iterNotes()
 201         self.displayNext()
 202         self._plugListeners(mode)
 203
 204     def _plugListeners(self, mode) :
 205         "initialisation des gestionnaires d'événements en fonction du mode"
 206
 207         if mode == PLAYING_MODES_DICT['BEGINNER'] :
 208             EventDispatcher.addEventListener(events.COLOVER, self.handleBeginnerColumnOver)
 209
 210         elif mode == PLAYING_MODES_DICT['EASY'] :
 211             EventDispatcher.addEventListener(events.COLDOWN, self.handleEasyColumnDown)
 212             EventDispatcher.addEventListener(events.COLOVER, self.handleEasyColumnOver)
 213
 214         elif mode == PLAYING_MODES_DICT['NORMAL'] :
 215             EventDispatcher.addEventListener(events.COLOVER, self.handleNormalColumnOver)
 216             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 217             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 218
 219         elif mode == PLAYING_MODES_DICT['ADVANCED'] :
 220             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 221             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 222
 223         elif mode == PLAYING_MODES_DICT['EXPERT'] :
 224             EventDispatcher.addEventListener(events.COLDOWN, self.handleExpertColumnDown)
 225             EventDispatcher.addEventListener(events.COLUP, self.handleExpertColumnUp)
 226
 227
 228     # --- HID listeners ---
 229     def handleBeginnerColumnOver(self, event) :
 230         col = event.column
 231         if col.state and not self.currentNotePlayed :
 232             self.playnote(col, event.pos)
 233             self.setNoteTimeout()
 234             self.currentNotePlayed = True
 235
 236     def handleEasyColumnOver(self, event) :
 237         col = event.column
 238         if col.state and \
 239            self.cursor.pressed and \
 240            not self.currentNotePlayed :
 241             self.playnote(col, event.pos)
 242             self.setNoteTimeout()
 243             self.currentNotePlayed = True
 244
 245
 246     def handleNormalColumnOver(self, event) :
 247         col = event.column
 248         if col.state and \
 249            self.cursor.pressed and \
 250            not self.currentNotePlayed :
 251             self.playnote(col, event.pos)
 252             self.currentNotePlayed = True
 253
 254     def handleColumnDown(self, event) :
 255         col = event.column
 256         if col.state:
 257             self.playnote(col, event.pos)
 258             self.currentNotePlayed = True
 259
 260     def handleEasyColumnDown(self, event) :
 261         col = event.column
 262         if col.state and \
 263            not self.currentNotePlayed :
 264             self.playnote(col, event.pos)
 265             self.setNoteTimeout()
 266             self.currentNotePlayed = True
 267
 268
 269     def handleExpertColumnDown(self, event) :
 270         col = event.column
 271         if col.state :
 272             self.playnote(col, event.pos)
 273             self.currentNotePlayed = True
 274         else :
 275             vel = self.getVelocity(event.pos) * MIDI_VELOCITY_WRONG_NOTE_ATTN
 276             vel = int(vel)
 277             self.playnote(col, event.pos, vel=vel)
 278             self.alternateColumn = col
 279             self.currentNotePlayed = False
 280
 281     def handleColumnUp(self, event) :
 282         if self.currentNotePlayed :
 283             self.synth.noteoff(0, self.currentColumn.tone.midi)
 284             self.displayNext()
 285
 286     def handleExpertColumnUp(self, event) :
 287         if self.currentNotePlayed :
 288             self.synth.noteoff(0, self.currentColumn.tone.midi)
 289             self.displayNext()
 290         else :
 291             self.synth.noteoff(0, self.alternateColumn.tone.midi)
 292
 293     # --- End HID listeners ---
 294
 295
 296     def displayNext(self, event=None) :
 297         if self.currentColumn:
 298             self.currentColumn.update(False)
 299         try :
 300             note, verseIndex = self.noteIterator.next()
 301         except StopIteration :
 302             self.noteIterator = self.song.iterNotes()
 303             note, verseIndex = self.noteIterator.next()
 304             eventLogger.info(pygame.event.Event(events.SONGEND))
 305         try :
 306             syllabus = note.lyrics[verseIndex].syllabus()
 307         except IndexError :
 308             syllabus = u'…'
 309
 310         column = self.columns[note.midi]
 311         column.update(True, syllabus)
 312         self.currentColumn = column
 313         self.currentNote = note
 314         self.currentNotePlayed = False
 315
 316     @event_handler(events.NOTEEND)
 317     def clearTimeOutAndDisplayNext(self, evt) :
 318         pygame.time.set_timer(evt.type, 0)
 319         self.synth.noteoff(0, self.currentNote.midi)
 320         self.displayNext()
 321
 322     def setNoteTimeout(self) :
 323         delay = self.currentNote.duration * self.quarterNoteDuration
 324         delay = delay + delay * self.tempoTrim
 325         pygame.time.set_timer(events.NOTEEND, delay)
 326
 327     def tempoTrimUp(self, step=0.1) :
 328         self.tempoTrim = round(self.tempoTrim - step, 1)
 329
 330     def tempoTrimDown(self, step=0.1) :
 331         self.tempoTrim = round(self.tempoTrim + step, 1)
 332
 333     def stop(self) :
 334         pygame.time.set_timer(events.NOTEEND, 0)
 335         super(SongPlayingScreen, self).stop()
 336
 337