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
  22 from globals import BACKGROUND_LAYER
  23 from globals import CURSOR_LAYER
  24 from globals import PLAYING_MODES_DICT
  25
  26 class _PlayingScreenBase(pygame.sprite.LayeredDirty, EventHandlerMixin) :
  27
  28     def __init__(self, synth, distinctNotes=[]) :
  29         """
  30         distinctNotes : notes disctinctes présentes dans la chanson
  31         triées du plus grave au plus aigu.
  32         """
  33         super(_PlayingScreenBase, self).__init__()
  34         self.synth = synth
  35         self.distinctNotes = distinctNotes
  36         self.keyboardLength = 0
  37         self.keyboardRects = []
  38         self.cursor = None
  39         self._initRects()
  40         self.columns = {}
  41         self._initColumns()
  42         self._running = False
  43         self.draw(pygame.display.get_surface())
  44         self._initCursor()
  45
  46     def _initRects(self) :
  47         """ création des espaces réservés pour
  48             afficher les colonnes.
  49         """
  50         #ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  51         #if ambitus <= 12 :
  52         #    self.keyboardLength = 8
  53         #else :
  54         #    self.keyboardLength = 11
  55         self.keyboardLength = len(self.distinctNotes)
  56
  57         screen = pygame.display.get_surface()
  58
  59         # taille de la zone d'affichage utile (bordure autour)
  60         self.dispWidth  = dispWidth = screen.get_width()
  61         self.dispHeight = dispHeight = screen.get_height()
  62
  63         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  64
  65         rects = []
  66         for i in range(self.keyboardLength) :
  67             upperLeftCorner = (i*columnWidth, 0)
  68             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  69             rects.append(rect)
  70
  71         self.keyboardRects = rects
  72
  73     def _initColumns(self) :
  74
  75         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  76         for i, rect in enumerate(self.keyboardRects) :
  77             hue = FIRST_HUE - hueStep * i
  78             tone = self.distinctNotes[i]
  79             c = Column(self, i, hue, rect, tone)
  80             self.add(c, layer=BACKGROUND_LAYER)
  81             self.columns[tone.midi] = c
  82
  83
  84     def _initCursor(self) :
  85         self.cursor = WarpingCursor(blinkMode=True)
  86         self.add(self.cursor, layer=CURSOR_LAYER)
  87
  88     def run(self):
  89         self._running = True
  90         clock = pygame.time.Clock()
  91         pygame.display.flip()
  92         pygame.mouse.set_visible(False)
  93         while self._running :
  94             EventDispatcher.dispatchEvents()
  95             dirty = self.draw(pygame.display.get_surface())
  96             pygame.display.update(dirty)
  97             clock.tick(FRAMERATE)
  98
  99     def stop(self) :
 100         self._running = False
 101         self.synth.system_reset()
 102         pygame.mouse.set_visible(True)
 103         self.cursor._stopBlink()
 104
 105     @event_handler(pygame.KEYDOWN)
 106     def handleKeyDown(self, event) :
 107         if event.key == pygame.K_q:
 108             self.stop()
 109
 110     @event_handler(pygame.MOUSEBUTTONDOWN)
 111     def onMouseDown(self, event) :
 112         # TODO à cleaner : on vire le dernier élément
 113         # parce qu'il s'agit du curseur
 114         for col in reversed(self.sprites()[:-1]) :
 115             if col.rect.collidepoint(*event.pos):
 116                 self.raiseColDown(col, event.pos)
 117                 break
 118
 119     @event_handler(pygame.MOUSEBUTTONUP)
 120     def onMouseUp(self, event) :
 121         for col in reversed(self.sprites()[:-1]) :
 122             if col.rect.collidepoint(*event.pos) :
 123                 self.raiseColUp(col, event.pos)
 124                 break
 125
 126     @event_handler(pygame.MOUSEMOTION)
 127     def onMouseMove(self, event) :
 128         for col in reversed(self.sprites()[:-1]) :
 129             if col.rect.collidepoint(*event.pos) :
 130                 self.raiseColOver(col, event.pos)
 131                 break
 132
 133     def raiseColDown(self, col, pos) :
 134         evt = pygame.event.Event(events.COLDOWN, column=col, pos=pos)
 135         pygame.event.post(evt)
 136
 137     def raiseColUp(self, col, pos) :
 138         evt = pygame.event.Event(events.COLUP, column=col, pos=pos)
 139         pygame.event.post(evt)
 140
 141     def raiseColOver(self, col, pos) :
 142         evt = pygame.event.Event(events.COLOVER, column=col, pos=pos)
 143         pygame.event.post(evt)
 144
 145     def getVelocity(self, pos) :
 146         vel = (float(self.dispWidth) - pos[1]) / self.dispWidth
 147         vel = int(vel * (MIDI_VELOCITY_RANGE[1] - MIDI_VELOCITY_RANGE[0])) + MIDI_VELOCITY_RANGE[0]
 148         return vel
 149
 150     def getPan(self, index) :
 151         pan = float(index) / (self.keyboardLength -1)
 152         pan = int(pan * (MIDI_PAN_RANGE[1] - MIDI_PAN_RANGE[0])) + MIDI_PAN_RANGE[0]
 153         return pan
 154
 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['EASY']) :
 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         if mode == PLAYING_MODES_DICT['NORMAL'] :
 190             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 191             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 192         elif mode == PLAYING_MODES_DICT['EASY'] :
 193             EventDispatcher.addEventListener(events.COLOVER, self.handleColumnOver)
 194
 195
 196     def displayNext(self, event=None) :
 197         if self.currentColumn:
 198             self.currentColumn.update(False)
 199         note, verseIndex = self.noteIterator.next()
 200         syllabus = note.lyrics[verseIndex].syllabus()
 201         column = self.columns[note.midi]
 202         column.update(True, syllabus)
 203         self.currentColumn = column
 204         self.currentNote = note
 205         self.currentNotePlayed = False
 206
 207     def handleColumnDown(self, event) :
 208         col = event.column
 209         if col.state:
 210             pan = self.getPan(col.index)
 211             self.synth.cc(0, 10, pan)
 212             vel = self.getVelocity(event.pos)
 213             self.synth.noteon(0, col.tone.midi, vel)
 214             self.currentNotePlayed = True
 215
 216     def handleColumnUp(self, event) :
 217         if self.currentNotePlayed :
 218             self.synth.noteoff(0, self.currentColumn.tone.midi)
 219             self.displayNext()
 220
 221     def handleColumnOver(self, event) :
 222         col = event.column
 223         if col.state and not self.currentNotePlayed :
 224             pan = self.getPan(col.index)
 225             self.synth.cc(0, 10, pan)
 226             vel = self.getVelocity(event.pos)
 227             self.synth.noteon(0, col.tone.midi, vel)
 228             SongPlayingScreen.setNoteTimeout(
 229                         int(self.currentNote.duration * \
 230                             self.quarterNoteDuration)
 231                                             )
 232             self.currentNotePlayed = True
 233
 234     @event_handler(events.NOTEEND)
 235     def clearTimeOutAndDisplayNext(self, evt) :
 236         pygame.time.set_timer(evt.type, 0)
 237         self.synth.noteoff(0, self.currentNote.midi)
 238         self.displayNext()
 239
 240     @staticmethod
 241     def setNoteTimeout(delay) :
 242         pygame.time.set_timer(events.NOTEEND, delay)
 243
 244     def stop(self) :
 245         pygame.time.set_timer(events.NOTEEND, 0)
 246         super(SongPlayingScreen, self).stop()
 247