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=[], displayNotes=True) :
  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.displayNotes = displayNotes
  39         self.keyboardLength = 0
  40         self.keyboardRects = []
  41         self.cursor = None
  42         self._initRects()
  43         self.columns = {}
  44         self._initColumns()
  45         self._running = False
  46         self.draw(pygame.display.get_surface())
  47         self._initCursor()
  48
  49     def _initRects(self) :
  50         """ création des espaces réservés pour
  51             afficher les colonnes.
  52         """
  53         self.keyboardLength = len(self.distinctNotes)
  54
  55         screen = pygame.display.get_surface()
  56
  57         self.dispWidth  = dispWidth = screen.get_width()
  58         self.dispHeight = dispHeight = screen.get_height()
  59
  60         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  61
  62         rects = []
  63         for i in range(self.keyboardLength - 1) :
  64             upperLeftCorner = (i*columnWidth, 0)
  65             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  66             rects.append(rect)
  67
  68         # la dernière colonne à la largeur du reste
  69         upperLeftCorner = ((i+1) * columnWidth, 0)
  70         rect = pygame.Rect(upperLeftCorner, (dispWidth - (self.keyboardLength - 1) * columnWidth , dispHeight))
  71         rects.append(rect)
  72
  73         self.keyboardRects = rects
  74
  75     def _initColumns(self) :
  76
  77         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  78         for i, rect in enumerate(self.keyboardRects) :
  79             hue = FIRST_HUE - hueStep * i
  80             tone = self.distinctNotes[i]
  81             c = Column(self, i, hue, rect, tone, displayNote=self.displayNotes)
  82             self.add(c, layer=BACKGROUND_LAYER)
  83             self.columns[tone.midi] = c
  84
  85
  86     def _initCursor(self) :
  87         self.cursor = WarpingCursor(blinkMode=True)
  88         self.add(self.cursor, layer=CURSOR_LAYER)
  89
  90     def run(self):
  91         self._running = True
  92         clock = pygame.time.Clock()
  93         pygame.display.flip()
  94         pygame.mouse.set_visible(False)
  95         while self._running :
  96             EventDispatcher.dispatchEvents()
  97             dirty = self.draw(pygame.display.get_surface())
  98             pygame.display.update(dirty)
  99             clock.tick(FRAMERATE)
 100
 101     def stop(self) :
 102         self._running = False
 103         self.synth.system_reset()
 104         pygame.mouse.set_visible(True)
 105         self.cursor._stopBlink()
 106
 107     @event_handler(pygame.KEYDOWN)
 108     def handleKeyDown(self, event) :
 109         if event.key == pygame.K_q or \
 110             event.unicode == u'q' or \
 111             pygame.K_ESCAPE:
 112             self.stop()
 113
 114     @event_handler(pygame.MOUSEBUTTONDOWN)
 115     def onMouseDown(self, event) :
 116         # TODO à cleaner : on vire le dernier élément
 117         # parce qu'il s'agit du curseur
 118         for col in reversed(self.sprites()[:-1]) :
 119             if col.rect.collidepoint(*event.pos):
 120                 self.raiseColDown(col, event)
 121                 break
 122
 123     @event_handler(pygame.MOUSEBUTTONUP)
 124     def onMouseUp(self, event) :
 125         for col in reversed(self.sprites()[:-1]) :
 126             if col.rect.collidepoint(*event.pos) :
 127                 self.raiseColUp(col, event)
 128                 break
 129
 130     @event_handler(pygame.MOUSEMOTION)
 131     def onMouseMove(self, event) :
 132         for col in reversed(self.sprites()[:-1]) :
 133             if col.rect.collidepoint(*event.pos) :
 134                 self.raiseColOver(col, event)
 135                 break
 136
 137     def raiseColDown(self, col, mouseEvent) :
 138         evt = pygame.event.Event(events.COLDOWN, column=col, pos=mouseEvent.pos)
 139         pygame.event.post(evt)
 140
 141     def raiseColUp(self, col, mouseEvent) :
 142         evt = pygame.event.Event(events.COLUP, column=col, pos=mouseEvent.pos)
 143         pygame.event.post(evt)
 144
 145     def raiseColOver(self, col, mouseEvent) :
 146         evt = pygame.event.Event(events.COLOVER, column=col, pos=mouseEvent.pos, mouseEvent=mouseEvent)
 147         pygame.event.post(evt)
 148
 149     def getVelocity(self, pos) :
 150         vel = (float(self.dispWidth) - pos[1]) / self.dispWidth
 151         vel = int(vel * (MIDI_VELOCITY_RANGE[1] - MIDI_VELOCITY_RANGE[0])) + MIDI_VELOCITY_RANGE[0]
 152         return vel
 153
 154     def getPan(self, index) :
 155         pan = float(index) / (self.keyboardLength -1)
 156         pan = int(pan * (MIDI_PAN_RANGE[1] - MIDI_PAN_RANGE[0])) + MIDI_PAN_RANGE[0]
 157         return pan
 158
 159     def playnote(self, col, pos, vel=None) :
 160         pan = self.getPan(col.index)
 161         self.synth.cc(0, 10, pan)
 162         vel = vel or self.getVelocity(pos)
 163         self.synth.noteon(0, col.tone.midi, vel)
 164
 165 class PlayingScreen(PlayingScreenBase) :
 166     "fenêtre de jeu pour improvisation"
 167
 168     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 169
 170     def __init__(self, synth, displayNotes=True) :
 171         distinctNotes = []
 172         self.currentColumn = None
 173         for midi in self.scale :
 174             tone = Tone(midi)
 175             distinctNotes.append(tone)
 176
 177         super(PlayingScreen, self).__init__(synth, distinctNotes, displayNotes=displayNotes)
 178
 179     @event_handler(events.COLDOWN)
 180     def noteon(self, event) :
 181         col = event.column
 182         col.update(True)
 183         self.currentColumn = col
 184         self.playnote(col, event.pos)
 185
 186     @event_handler(events.COLUP)
 187     def noteoff(self, event) :
 188         if self.currentColumn :
 189             self.currentColumn.update(False)
 190             self.synth.noteoff(0, self.currentColumn.tone.midi)
 191
 192
 193 class SongPlayingScreen(PlayingScreenBase) :
 194
 195     def __init__(self, synth, song, mode=PLAYING_MODES_DICT['NORMAL'], displayNotes=True, tempoTrim=0) :
 196         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes, displayNotes=displayNotes)
 197         self.song = song
 198         self.quarterNoteDuration = song.quarterNoteDuration
 199         self.tempoTrim = tempoTrim
 200         self.currentColumn = None
 201         self.noteIterator = self.song.iterNotes()
 202         self.displayNext()
 203         self._plugListeners(mode)
 204
 205     def _plugListeners(self, mode) :
 206         "initialisation des gestionnaires d'événements en fonction du mode"
 207
 208         if mode == PLAYING_MODES_DICT['BEGINNER'] :
 209             EventDispatcher.addEventListener(events.COLOVER, self.handleBeginnerColumnOver)
 210
 211         elif mode == PLAYING_MODES_DICT['EASY'] :
 212             EventDispatcher.addEventListener(events.COLDOWN, self.handleEasyColumnDown)
 213             EventDispatcher.addEventListener(events.COLOVER, self.handleEasyColumnOver)
 214
 215         elif mode == PLAYING_MODES_DICT['NORMAL'] :
 216             EventDispatcher.addEventListener(events.COLOVER, self.handleNormalColumnOver)
 217             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 218             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 219
 220         elif mode == PLAYING_MODES_DICT['ADVANCED'] :
 221             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 222             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 223
 224         elif mode == PLAYING_MODES_DICT['EXPERT'] :
 225             EventDispatcher.addEventListener(events.COLDOWN, self.handleExpertColumnDown)
 226             EventDispatcher.addEventListener(events.COLUP, self.handleExpertColumnUp)
 227
 228
 229     # --- HID listeners ---
 230     def handleBeginnerColumnOver(self, event) :
 231         col = event.column
 232         if col.state and not self.currentNotePlayed :
 233             self.playnote(col, event.pos)
 234             self.setNoteTimeout()
 235             self.currentNotePlayed = True
 236
 237     def handleEasyColumnOver(self, event) :
 238         col = event.column
 239         if col.state and \
 240            self.cursor.pressed and \
 241            not self.currentNotePlayed :
 242             self.playnote(col, event.pos)
 243             self.setNoteTimeout()
 244             self.currentNotePlayed = True
 245
 246
 247     def handleNormalColumnOver(self, event) :
 248         col = event.column
 249         if col.state and \
 250            self.cursor.pressed and \
 251            not self.currentNotePlayed :
 252             self.playnote(col, event.pos)
 253             self.currentNotePlayed = True
 254
 255     def handleColumnDown(self, event) :
 256         col = event.column
 257         if col.state:
 258             self.playnote(col, event.pos)
 259             self.currentNotePlayed = True
 260
 261     def handleEasyColumnDown(self, event) :
 262         col = event.column
 263         if col.state and \
 264            not self.currentNotePlayed :
 265             self.playnote(col, event.pos)
 266             self.setNoteTimeout()
 267             self.currentNotePlayed = True
 268
 269
 270     def handleExpertColumnDown(self, event) :
 271         col = event.column
 272         if col.state :
 273             self.playnote(col, event.pos)
 274             self.currentNotePlayed = True
 275         else :
 276             vel = self.getVelocity(event.pos) * MIDI_VELOCITY_WRONG_NOTE_ATTN
 277             vel = int(vel)
 278             self.playnote(col, event.pos, vel=vel)
 279             self.alternateColumn = col
 280             self.currentNotePlayed = False
 281
 282     def handleColumnUp(self, event) :
 283         if self.currentNotePlayed :
 284             self.synth.noteoff(0, self.currentColumn.tone.midi)
 285             self.displayNext()
 286
 287     def handleExpertColumnUp(self, event) :
 288         if self.currentNotePlayed :
 289             self.synth.noteoff(0, self.currentColumn.tone.midi)
 290             self.displayNext()
 291         else :
 292             self.synth.noteoff(0, self.alternateColumn.tone.midi)
 293
 294     # --- End HID listeners ---
 295
 296
 297     def displayNext(self, event=None) :
 298         if self.currentColumn:
 299             self.currentColumn.update(False)
 300         try :
 301             note, verseIndex = self.noteIterator.next()
 302         except StopIteration :
 303             self.noteIterator = self.song.iterNotes()
 304             note, verseIndex = self.noteIterator.next()
 305             eventLogger.info(pygame.event.Event(events.SONGEND))
 306         try :
 307             syllabus = note.lyrics[verseIndex].syllabus()
 308         except IndexError :
 309             syllabus = u'…'
 310
 311         column = self.columns[note.midi]
 312         column.update(True, syllabus)
 313         self.currentColumn = column
 314         self.currentNote = note
 315         self.currentNotePlayed = False
 316
 317     @event_handler(events.NOTEEND)
 318     def clearTimeOutAndDisplayNext(self, evt) :
 319         pygame.time.set_timer(evt.type, 0)
 320         self.synth.noteoff(0, self.currentNote.midi)
 321         self.displayNext()
 322
 323     def setNoteTimeout(self) :
 324         delay = self.currentNote.duration * self.quarterNoteDuration
 325         delay = delay + delay * self.tempoTrim
 326         pygame.time.set_timer(events.NOTEEND, delay)
 327
 328     def tempoTrimUp(self, step=0.1) :
 329         self.tempoTrim = round(self.tempoTrim - step, 1)
 330
 331     def tempoTrimDown(self, step=0.1) :
 332         self.tempoTrim = round(self.tempoTrim + step, 1)
 333
 334     def stop(self) :
 335         pygame.time.set_timer(events.NOTEEND, 0)
 336         super(SongPlayingScreen, self).stop()
 337
 338