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         dispWidth = screen.get_width() - 2 * BORDER
  61         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             atBorder = False
  80             if i == 0 :
  81                 atBorder = 'left'
  82             elif i == self.keyboardLength -1 :
  83                 atBorder = 'right'
  84             c = Column(self, hue, rect, tone, atBorder)
  85             self.add(c, layer=BACKGROUND_LAYER)
  86             self.columns[tone.midi] = c
  87
  88
  89     def _initCursor(self) :
  90         self.cursor = WarpingCursor(blinkMode=True)
  91         self.add(self.cursor, layer=CURSOR_LAYER)
  92
  93     def run(self):
  94         self._running = True
  95         clock = pygame.time.Clock()
  96         pygame.display.flip()
  97         pygame.mouse.set_visible(False)
  98         while self._running :
  99             EventDispatcher.dispatchEvents()
 100             dirty = self.draw(pygame.display.get_surface())
 101             pygame.display.update(dirty)
 102             clock.tick(FRAMERATE)
 103
 104     def stop(self) :
 105         self._running = False
 106         self.synth.system_reset()
 107         pygame.mouse.set_visible(True)
 108         self.cursor._stopBlink()
 109
 110     @event_handler(pygame.KEYDOWN)
 111     def handleKeyDown(self, event) :
 112         if event.key == pygame.K_q:
 113             self.stop()
 114
 115     @event_handler(pygame.MOUSEBUTTONDOWN)
 116     def onMouseDown(self, event) :
 117         # TODO à cleaner : on vire le dernier élément
 118         # parce qu'il s'agit du curseur
 119         for col in reversed(self.sprites()[:-1]) :
 120             if col.rect.collidepoint(*event.pos):
 121                 self.raiseColDown(col)
 122                 break
 123
 124     @event_handler(pygame.MOUSEBUTTONUP)
 125     def onMouseUp(self, event) :
 126         for col in reversed(self.sprites()[:-1]) :
 127             if col.rect.collidepoint(*event.pos) :
 128                 self.raiseColUp(col)
 129                 break
 130
 131     @event_handler(pygame.MOUSEMOTION)
 132     def onMouseMove(self, event) :
 133         for col in reversed(self.sprites()[:-1]) :
 134             if col.rect.collidepoint(*event.pos) :
 135                 self.raiseColOver(col)
 136                 break
 137
 138     def raiseColDown(self, col) :
 139         evt = pygame.event.Event(events.COLDOWN, column=col)
 140         pygame.event.post(evt)
 141
 142     def raiseColUp(self, col) :
 143         evt = pygame.event.Event(events.COLUP, column=col)
 144         pygame.event.post(evt)
 145
 146     def raiseColOver(self, col) :
 147         evt = pygame.event.Event(events.COLOVER, column=col)
 148         pygame.event.post(evt)
 149
 150
 151 class PlayingScreen(_PlayingScreenBase) :
 152     "fenêtre de jeu pour improvisation"
 153
 154     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 155
 156     def __init__(self, synth) :
 157         distinctNotes = []
 158         for midi in self.scale :
 159             tone = Tone(midi)
 160             distinctNotes.append(tone)
 161
 162         super(PlayingScreen, self).__init__(synth, distinctNotes)
 163
 164     @event_handler(events.NOTEON)
 165     def noteon(self, evt) :
 166         tone = evt.tone
 167         self.synth.noteon(0, tone.midi, DEFAULT_MIDI_VELOCITY)
 168
 169     @event_handler(events.NOTEOFF)
 170     def noteoff(self, evt) :
 171         tone = evt.tone
 172         self.synth.noteoff(0, tone.midi)
 173
 174
 175 class SongPlayingScreen(_PlayingScreenBase) :
 176
 177     def __init__(self, synth, song, mode=PLAYING_MODES_DICT['EASY']) :
 178         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes)
 179         self.song = song
 180         self.quarterNoteDuration = song.quarterNoteDuration
 181         self.currentColumn = None
 182         self.noteIterator = self.song.iterNotes()
 183         self.displayNext()
 184         if mode == PLAYING_MODES_DICT['NORMAL'] :
 185             EventDispatcher.addEventListener(events.COLDOWN, self.handleColumnDown)
 186             EventDispatcher.addEventListener(events.COLUP, self.handleColumnUp)
 187         elif mode == PLAYING_MODES_DICT['EASY'] :
 188             EventDispatcher.addEventListener(events.COLOVER, self.handleColumnOver)
 189
 190
 191     def displayNext(self, event=None) :
 192         if self.currentColumn:
 193             self.currentColumn.update(False)
 194         note, verseIndex = self.noteIterator.next()
 195         syllabus = note.lyrics[verseIndex].syllabus()
 196         column = self.columns[note.midi]
 197         column.update(True, syllabus)
 198         self.currentColumn = column
 199         self.currentNote = note
 200         self.currentNotePlayed = False
 201
 202     def handleColumnDown(self, event) :
 203         col = event.column
 204         if col.state:
 205             self.synth.noteon(0, col.tone.midi, DEFAULT_MIDI_VELOCITY)
 206             self.currentNotePlayed = True
 207
 208     def handleColumnUp(self, event) :
 209         if self.currentNotePlayed :
 210             self.synth.noteoff(0, self.currentColumn.tone.midi)
 211             self.displayNext()
 212
 213     def handleColumnOver(self, event) :
 214         col = event.column
 215         if col.state and not self.currentNotePlayed :
 216             self.synth.noteon(0, col.tone.midi, DEFAULT_MIDI_VELOCITY)
 217             SongPlayingScreen.setNoteTimeout(
 218                         int(self.currentNote.duration * \
 219                             self.quarterNoteDuration)
 220                                             )
 221             self.currentNotePlayed = True
 222
 223     @event_handler(events.NOTEEND)
 224     def clearTimeOutAndDisplayNext(self, evt) :
 225         pygame.time.set_timer(evt.type, 0)
 226         self.synth.noteoff(0, self.currentNote.midi)
 227         self.displayNext()
 228
 229     @staticmethod
 230     def setNoteTimeout(delay) :
 231         pygame.time.set_timer(events.NOTEEND, delay)
 232
 233     def stop(self) :
 234         pygame.time.set_timer(events.NOTEEND, 0)
 235         super(SongPlayingScreen, self).stop()
 236