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         self.keyboardLength = len(self.distinctNotes)
  51
  52         screen = pygame.display.get_surface()
  53
  54         self.dispWidth  = dispWidth = screen.get_width()
  55         self.dispHeight = dispHeight = screen.get_height()
  56
  57         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  58
  59         rects = []
  60         for i in range(self.keyboardLength) :
  61             upperLeftCorner = (i*columnWidth, 0)
  62             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  63             rects.append(rect)
  64
  65         self.keyboardRects = rects
  66
  67     def _initColumns(self) :
  68
  69         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  70         for i, rect in enumerate(self.keyboardRects) :
  71             hue = FIRST_HUE - hueStep * i
  72             tone = self.distinctNotes[i]
  73             c = Column(self, i, hue, rect, tone)
  74             self.add(c, layer=BACKGROUND_LAYER)
  75             self.columns[tone.midi] = c
  76
  77
  78     def _initCursor(self) :
  79         self.cursor = WarpingCursor(blinkMode=True)
  80         self.add(self.cursor, layer=CURSOR_LAYER)
  81
  82     def run(self):
  83         self._running = True
  84         clock = pygame.time.Clock()
  85         pygame.display.flip()
  86         pygame.mouse.set_visible(False)
  87         while self._running :
  88             EventDispatcher.dispatchEvents()
  89             dirty = self.draw(pygame.display.get_surface())
  90             pygame.display.update(dirty)
  91             clock.tick()
  92
  93     def stop(self) :
  94         self._running = False
  95         self.synth.system_reset()
  96         pygame.mouse.set_visible(True)
  97         self.cursor._stopBlink()
  98
  99     @event_handler(pygame.KEYDOWN)
 100     def handleKeyDown(self, event) :
 101         if event.key == pygame.K_q:
 102             self.stop()
 103
 104     @event_handler(pygame.MOUSEBUTTONDOWN)
 105     def onMouseDown(self, event) :
 106         # TODO à cleaner : on vire le dernier élément
 107         # parce qu'il s'agit du curseur
 108         for col in reversed(self.sprites()[:-1]) :
 109             if col.rect.collidepoint(*event.pos):
 110                 self.raiseColDown(col, event.pos)
 111                 break
 112
 113     @event_handler(pygame.MOUSEBUTTONUP)
 114     def onMouseUp(self, event) :
 115         for col in reversed(self.sprites()[:-1]) :
 116             if col.rect.collidepoint(*event.pos) :
 117                 self.raiseColUp(col, event.pos)
 118                 break
 119
 120     @event_handler(pygame.MOUSEMOTION)
 121     def onMouseMove(self, event) :
 122         for col in reversed(self.sprites()[:-1]) :
 123             if col.rect.collidepoint(*event.pos) :
 124                 self.raiseColOver(col, event.pos)
 125                 break
 126
 127     def raiseColDown(self, col, pos) :
 128         evt = pygame.event.Event(events.COLDOWN, column=col, pos=pos)
 129         pygame.event.post(evt)
 130
 131     def raiseColUp(self, col, pos) :
 132         evt = pygame.event.Event(events.COLUP, column=col, pos=pos)
 133         pygame.event.post(evt)
 134
 135     def raiseColOver(self, col, pos) :
 136         evt = pygame.event.Event(events.COLOVER, column=col, pos=pos)
 137         pygame.event.post(evt)
 138
 139     def getVelocity(self, pos) :
 140         vel = (float(self.dispWidth) - pos[1]) / self.dispWidth
 141         vel = int(vel * (MIDI_VELOCITY_RANGE[1] - MIDI_VELOCITY_RANGE[0])) + MIDI_VELOCITY_RANGE[0]
 142         return vel
 143
 144     def getPan(self, index) :
 145         pan = float(index) / (self.keyboardLength -1)
 146         pan = int(pan * (MIDI_PAN_RANGE[1] - MIDI_PAN_RANGE[0])) + MIDI_PAN_RANGE[0]
 147         return pan
 148
 149
 150 class PlayingScreen(PlayingScreenBase) :
 151     "fenêtre de jeu pour improvisation"
 152
 153     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 154
 155     def __init__(self, synth) :
 156         distinctNotes = []
 157         for midi in self.scale :
 158             tone = Tone(midi)
 159             distinctNotes.append(tone)
 160
 161         super(PlayingScreen, self).__init__(synth, distinctNotes)
 162
 163     @event_handler(events.NOTEON)
 164     def noteon(self, evt) :
 165         tone = evt.tone
 166         self.synth.noteon(0, tone.midi, 96)
 167
 168     @event_handler(events.NOTEOFF)
 169     def noteoff(self, evt) :
 170         tone = evt.tone
 171         self.synth.noteoff(0, tone.midi)
 172
 173
 174 class SongPlayingScreen(PlayingScreenBase) :
 175
 176     def __init__(self, synth, song, mode=PLAYING_MODES_DICT['EASY']) :
 177         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes)
 178         self.song = song
 179         self.quarterNoteDuration = song.quarterNoteDuration
 180         self.currentColumn = None
 181         self.noteIterator = self.song.iterNotes()
 182         self.displayNext()
 183         if mode == PLAYING_MODES_DICT['NORMAL'] :
 184             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 185             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 186         elif mode == PLAYING_MODES_DICT['EASY'] :
 187             EventDispatcher.addEventListener(events.COLOVER, self.handleColumnOver)
 188
 189
 190     def displayNext(self, event=None) :
 191         if self.currentColumn:
 192             self.currentColumn.update(False)
 193         note, verseIndex = self.noteIterator.next()
 194         syllabus = note.lyrics[verseIndex].syllabus()
 195         column = self.columns[note.midi]
 196         column.update(True, syllabus)
 197         self.currentColumn = column
 198         self.currentNote = note
 199         self.currentNotePlayed = False
 200
 201     def handleColumnDown(self, event) :
 202         col = event.column
 203         if col.state:
 204             pan = self.getPan(col.index)
 205             self.synth.cc(0, 10, pan)
 206             vel = self.getVelocity(event.pos)
 207             self.synth.noteon(0, col.tone.midi, vel)
 208             self.currentNotePlayed = True
 209
 210     def handleColumnUp(self, event) :
 211         if self.currentNotePlayed :
 212             self.synth.noteoff(0, self.currentColumn.tone.midi)
 213             self.displayNext()
 214
 215     def handleColumnOver(self, event) :
 216         col = event.column
 217         if col.state and not self.currentNotePlayed :
 218             pan = self.getPan(col.index)
 219             self.synth.cc(0, 10, pan)
 220             vel = self.getVelocity(event.pos)
 221             self.synth.noteon(0, col.tone.midi, vel)
 222             SongPlayingScreen.setNoteTimeout(
 223                         int(self.currentNote.duration * \
 224                             self.quarterNoteDuration)
 225                                             )
 226             self.currentNotePlayed = True
 227
 228     @event_handler(events.NOTEEND)
 229     def clearTimeOutAndDisplayNext(self, evt) :
 230         pygame.time.set_timer(evt.type, 0)
 231         self.synth.noteoff(0, self.currentNote.midi)
 232         self.displayNext()
 233
 234     @staticmethod
 235     def setNoteTimeout(delay) :
 236         pygame.time.set_timer(events.NOTEEND, delay)
 237
 238     def stop(self) :
 239         pygame.time.set_timer(events.NOTEEND, 0)
 240         super(SongPlayingScreen, self).stop()
 241
 242