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 BORDER
  19 from config import FIRST_HUE
  20 from config import DEFAULT_MIDI_VELOCITY
  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() - 2 * BORDER
  61         self.dispHeight = dispHeight = screen.get_height() - 2 * BORDER
  62
  63         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  64
  65         rects = []
  66         for i in range(self.keyboardLength) :
  67             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  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, 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
 146 class PlayingScreen(_PlayingScreenBase) :
 147     "fenêtre de jeu pour improvisation"
 148
 149     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 150
 151     def __init__(self, synth) :
 152         distinctNotes = []
 153         for midi in self.scale :
 154             tone = Tone(midi)
 155             distinctNotes.append(tone)
 156
 157         super(PlayingScreen, self).__init__(synth, distinctNotes)
 158
 159     @event_handler(events.NOTEON)
 160     def noteon(self, evt) :
 161         tone = evt.tone
 162         self.synth.noteon(0, tone.midi, DEFAULT_MIDI_VELOCITY)
 163
 164     @event_handler(events.NOTEOFF)
 165     def noteoff(self, evt) :
 166         tone = evt.tone
 167         self.synth.noteoff(0, tone.midi)
 168
 169
 170 class SongPlayingScreen(_PlayingScreenBase) :
 171
 172     def __init__(self, synth, song, mode=PLAYING_MODES_DICT['EASY']) :
 173         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes)
 174         self.song = song
 175         self.quarterNoteDuration = song.quarterNoteDuration
 176         self.currentColumn = None
 177         self.noteIterator = self.song.iterNotes()
 178         self.displayNext()
 179         if mode == PLAYING_MODES_DICT['NORMAL'] :
 180             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 181             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 182         elif mode == PLAYING_MODES_DICT['EASY'] :
 183             EventDispatcher.addEventListener(events.COLOVER, self.handleColumnOver)
 184
 185
 186     def displayNext(self, event=None) :
 187         if self.currentColumn:
 188             self.currentColumn.update(False)
 189         note, verseIndex = self.noteIterator.next()
 190         syllabus = note.lyrics[verseIndex].syllabus()
 191         column = self.columns[note.midi]
 192         column.update(True, syllabus)
 193         self.currentColumn = column
 194         self.currentNote = note
 195         self.currentNotePlayed = False
 196
 197     def handleColumnDown(self, event) :
 198         col = event.column
 199         if col.state:
 200             self.synth.noteon(0, col.tone.midi, DEFAULT_MIDI_VELOCITY)
 201             self.currentNotePlayed = True
 202
 203     def handleColumnUp(self, event) :
 204         if self.currentNotePlayed :
 205             self.synth.noteoff(0, self.currentColumn.tone.midi)
 206             self.displayNext()
 207
 208     def handleColumnOver(self, event) :
 209         col = event.column
 210         if col.state and not self.currentNotePlayed :
 211             self.synth.noteon(0, col.tone.midi, DEFAULT_MIDI_VELOCITY)
 212             SongPlayingScreen.setNoteTimeout(
 213                         int(self.currentNote.duration * \
 214                             self.quarterNoteDuration)
 215                                             )
 216             self.currentNotePlayed = True
 217
 218     @event_handler(events.NOTEEND)
 219     def clearTimeOutAndDisplayNext(self, evt) :
 220         pygame.time.set_timer(evt.type, 0)
 221         self.synth.noteoff(0, self.currentNote.midi)
 222         self.displayNext()
 223
 224     @staticmethod
 225     def setNoteTimeout(delay) :
 226         pygame.time.set_timer(events.NOTEEND, delay)
 227
 228     def stop(self) :
 229         pygame.time.set_timer(events.NOTEEND, 0)
 230         super(SongPlayingScreen, self).stop()
 231