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 cursors import WarpingCursor
  11 from column import Column
  12 import events
  13 from eventutils import event_handler, EventDispatcher, EventHandlerMixin
  14 import types
  15 from musicxml import Tone
  16
  17 from config import FRAMERATE
  18 from config import FIRST_HUE
  19 from config import MIDI_VELOCITY_RANGE
  20 from config import MIDI_PAN_RANGE
  21 from config import MIDI_VELOCITY_WRONG_NOTE_ATTN
  22
  23 from globals import BACKGROUND_LAYER
  24 from globals import CURSOR_LAYER
  25 from globals import PLAYING_MODES_DICT
  26
  27 class PlayingScreenBase(pygame.sprite.LayeredDirty, EventHandlerMixin) :
  28
  29     def __init__(self, synth, distinctNotes=[]) :
  30         """
  31         distinctNotes : notes disctinctes présentes dans la chanson
  32         triées du plus grave au plus aigu.
  33         """
  34         super(PlayingScreenBase, self).__init__()
  35         self.synth = synth
  36         self.distinctNotes = distinctNotes
  37         self.keyboardLength = 0
  38         self.keyboardRects = []
  39         self.cursor = None
  40         self._initRects()
  41         self.columns = {}
  42         self._initColumns()
  43         self._running = False
  44         self.draw(pygame.display.get_surface())
  45         self._initCursor()
  46
  47     def _initRects(self) :
  48         """ création des espaces réservés pour
  49             afficher les colonnes.
  50         """
  51         self.keyboardLength = len(self.distinctNotes)
  52
  53         screen = pygame.display.get_surface()
  54
  55         self.dispWidth  = dispWidth = screen.get_width()
  56         self.dispHeight = dispHeight = screen.get_height()
  57
  58         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  59
  60         rects = []
  61         for i in range(self.keyboardLength) :
  62             upperLeftCorner = (i*columnWidth, 0)
  63             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  64             rects.append(rect)
  65
  66         self.keyboardRects = rects
  67
  68     def _initColumns(self) :
  69
  70         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  71         for i, rect in enumerate(self.keyboardRects) :
  72             hue = FIRST_HUE - hueStep * i
  73             tone = self.distinctNotes[i]
  74             c = Column(self, i, hue, rect, tone)
  75             self.add(c, layer=BACKGROUND_LAYER)
  76             self.columns[tone.midi] = c
  77
  78
  79     def _initCursor(self) :
  80         self.cursor = WarpingCursor(blinkMode=True)
  81         self.add(self.cursor, layer=CURSOR_LAYER)
  82
  83     def run(self):
  84         self._running = True
  85         clock = pygame.time.Clock()
  86         pygame.display.flip()
  87         pygame.mouse.set_visible(False)
  88         while self._running :
  89             EventDispatcher.dispatchEvents()
  90             dirty = self.draw(pygame.display.get_surface())
  91             pygame.display.update(dirty)
  92             clock.tick(FRAMERATE)
  93
  94     def stop(self) :
  95         self._running = False
  96         self.synth.system_reset()
  97         pygame.mouse.set_visible(True)
  98         self.cursor._stopBlink()
  99
 100     @event_handler(pygame.KEYDOWN)
 101     def handleKeyDown(self, event) :
 102         if event.key == pygame.K_q or event.unicode == u'q':
 103             self.stop()
 104
 105     @event_handler(pygame.MOUSEBUTTONDOWN)
 106     def onMouseDown(self, event) :
 107         # TODO à cleaner : on vire le dernier élément
 108         # parce qu'il s'agit du curseur
 109         for col in reversed(self.sprites()[:-1]) :
 110             if col.rect.collidepoint(*event.pos):
 111                 self.raiseColDown(col, event)
 112                 break
 113
 114     @event_handler(pygame.MOUSEBUTTONUP)
 115     def onMouseUp(self, event) :
 116         for col in reversed(self.sprites()[:-1]) :
 117             if col.rect.collidepoint(*event.pos) :
 118                 self.raiseColUp(col, event)
 119                 break
 120
 121     @event_handler(pygame.MOUSEMOTION)
 122     def onMouseMove(self, event) :
 123         for col in reversed(self.sprites()[:-1]) :
 124             if col.rect.collidepoint(*event.pos) :
 125                 self.raiseColOver(col, event)
 126                 break
 127
 128     def raiseColDown(self, col, mouseEvent) :
 129         evt = pygame.event.Event(events.COLDOWN, column=col, pos=mouseEvent.pos)
 130         pygame.event.post(evt)
 131
 132     def raiseColUp(self, col, mouseEvent) :
 133         evt = pygame.event.Event(events.COLUP, column=col, pos=mouseEvent.pos)
 134         pygame.event.post(evt)
 135
 136     def raiseColOver(self, col, mouseEvent) :
 137         evt = pygame.event.Event(events.COLOVER, column=col, pos=mouseEvent.pos, mouseEvent=mouseEvent)
 138         pygame.event.post(evt)
 139
 140     def getVelocity(self, pos) :
 141         vel = (float(self.dispWidth) - pos[1]) / self.dispWidth
 142         vel = int(vel * (MIDI_VELOCITY_RANGE[1] - MIDI_VELOCITY_RANGE[0])) + MIDI_VELOCITY_RANGE[0]
 143         return vel
 144
 145     def getPan(self, index) :
 146         pan = float(index) / (self.keyboardLength -1)
 147         pan = int(pan * (MIDI_PAN_RANGE[1] - MIDI_PAN_RANGE[0])) + MIDI_PAN_RANGE[0]
 148         return pan
 149
 150     def playnote(self, col, pos, vel=None) :
 151         pan = self.getPan(col.index)
 152         self.synth.cc(0, 10, pan)
 153         vel = vel or self.getVelocity(pos)
 154         self.synth.noteon(0, col.tone.midi, vel)
 155
 156 class PlayingScreen(PlayingScreenBase) :
 157     "fenêtre de jeu pour improvisation"
 158
 159     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 160
 161     def __init__(self, synth) :
 162         distinctNotes = []
 163         for midi in self.scale :
 164             tone = Tone(midi)
 165             distinctNotes.append(tone)
 166
 167         super(PlayingScreen, self).__init__(synth, distinctNotes)
 168
 169     @event_handler(events.NOTEON)
 170     def noteon(self, evt) :
 171         tone = evt.tone
 172         self.synth.noteon(0, tone.midi, 96)
 173
 174     @event_handler(events.NOTEOFF)
 175     def noteoff(self, evt) :
 176         tone = evt.tone
 177         self.synth.noteoff(0, tone.midi)
 178
 179
 180 class SongPlayingScreen(PlayingScreenBase) :
 181
 182     def __init__(self, synth, song, mode=PLAYING_MODES_DICT['NORMAL']) :
 183         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes)
 184         self.song = song
 185         self.quarterNoteDuration = song.quarterNoteDuration
 186         self.currentColumn = None
 187         self.noteIterator = self.song.iterNotes()
 188         self.displayNext()
 189         self._plugListeners(mode)
 190
 191     def _plugListeners(self, mode) :
 192         "initialisation des gestionnaires d'événements en fonction du mode"
 193
 194         if mode == PLAYING_MODES_DICT['EASY'] :
 195             EventDispatcher.addEventListener(events.COLOVER, self.handleEasyColumnOver)
 196
 197         elif mode == PLAYING_MODES_DICT['NORMAL'] :
 198             EventDispatcher.addEventListener(events.COLOVER, self.handleNormalColumnOver)
 199             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 200             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 201
 202         elif mode == PLAYING_MODES_DICT['ADVANCED'] :
 203             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 204             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 205
 206         elif mode == PLAYING_MODES_DICT['EXPERT'] :
 207             EventDispatcher.addEventListener(events.COLDOWN, self.handleExpertColumnDown)
 208             EventDispatcher.addEventListener(events.COLUP, self.handleExpertColumnUp)
 209
 210
 211     # --- HID listeners ---
 212     def handleEasyColumnOver(self, event) :
 213         col = event.column
 214         if col.state and not self.currentNotePlayed :
 215             self.playnote(col, event.pos)
 216             SongPlayingScreen.setNoteTimeout(
 217                         int(self.currentNote.duration * \
 218                             self.quarterNoteDuration)
 219                                             )
 220             self.currentNotePlayed = True
 221
 222     def handleNormalColumnOver(self, event) :
 223         col = event.column
 224         if col.state and \
 225            any(event.mouseEvent.buttons) and \
 226            not self.currentNotePlayed :
 227             self.playnote(col, event.pos)
 228             self.currentNotePlayed = True
 229
 230     def handleColumnDown(self, event) :
 231         col = event.column
 232         if col.state:
 233             self.playnote(col, event.pos)
 234             self.currentNotePlayed = True
 235
 236     def handleExpertColumnDown(self, event) :
 237         col = event.column
 238         if col.state :
 239             self.playnote(col, event.pos)
 240             self.currentNotePlayed = True
 241         else :
 242             vel = self.getVelocity(event.pos) * MIDI_VELOCITY_WRONG_NOTE_ATTN
 243             vel = int(vel)
 244             self.playnote(col, event.pos, vel=vel)
 245             self.alternateColumn = col
 246             self.currentNotePlayed = False
 247
 248     def handleColumnUp(self, event) :
 249         if self.currentNotePlayed :
 250             self.synth.noteoff(0, self.currentColumn.tone.midi)
 251             self.displayNext()
 252
 253     def handleExpertColumnUp(self, event) :
 254         if self.currentNotePlayed :
 255             self.synth.noteoff(0, self.currentColumn.tone.midi)
 256             self.displayNext()
 257         else :
 258             self.synth.noteoff(0, self.alternateColumn.tone.midi)
 259
 260     # --- End HID listeners ---
 261
 262
 263     def displayNext(self, event=None) :
 264         if self.currentColumn:
 265             self.currentColumn.update(False)
 266         note, verseIndex = self.noteIterator.next()
 267         syllabus = note.lyrics[verseIndex].syllabus()
 268         column = self.columns[note.midi]
 269         column.update(True, syllabus)
 270         self.currentColumn = column
 271         self.currentNote = note
 272         self.currentNotePlayed = False
 273
 274     @event_handler(events.NOTEEND)
 275     def clearTimeOutAndDisplayNext(self, evt) :
 276         pygame.time.set_timer(evt.type, 0)
 277         self.synth.noteoff(0, self.currentNote.midi)
 278         self.displayNext()
 279
 280     @staticmethod
 281     def setNoteTimeout(delay) :
 282         pygame.time.set_timer(events.NOTEEND, delay)
 283
 284     def stop(self) :
 285         pygame.time.set_timer(events.NOTEEND, 0)
 286         super(SongPlayingScreen, self).stop()
 287
 288