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