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
  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             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         pygame.mouse.set_visible(True)
 100         self.cursor._stopBlink()
 101
 102     @event_handler(pygame.KEYDOWN)
 103     def handleKeyDown(self, event) :
 104         if event.key == pygame.K_q:
 105             self._running = False
 106
 107     @event_handler(pygame.MOUSEBUTTONDOWN)
 108     def onMouseDown(self, event) :
 109         # TODO à cleaner : on vire le dernier élément
 110         # parce qu'il s'agit du curseur
 111         for col in reversed(self.sprites()[:-1]) :
 112             if col.rect.collidepoint(*event.pos):
 113                 self.raiseKeyDown(col)
 114                 break
 115
 116     @event_handler(pygame.MOUSEBUTTONUP)
 117     def onMouseUp(self, event) :
 118         for col in reversed(self.sprites()[:-1]) :
 119             if col.rect.collidepoint(*event.pos) :
 120                 self.raiseKeyUp(col)
 121                 break
 122
 123     def raiseKeyDown(self, col) :
 124         evt = pygame.event.Event(events.COLDOWN, column=col)
 125         pygame.event.post(evt)
 126
 127     def raiseKeyUp(self, col) :
 128         evt = pygame.event.Event(events.COLUP, column=col)
 129         pygame.event.post(evt)
 130
 131
 132 class PlayingScreen(_PlayingScreenBase) :
 133     "fenêtre de jeu pour improvisation"
 134
 135     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 136
 137     def __init__(self, synth) :
 138         distinctNotes = []
 139         for midi in self.scale :
 140             tone = Tone(midi)
 141             distinctNotes.append(tone)
 142
 143         super(PlayingScreen, self).__init__(synth, distinctNotes)
 144
 145     @event_handler(events.NOTEON)
 146     def noteon(self, evt) :
 147         tone = evt.tone
 148         self.synth.noteon(0, tone.midi, DEFAULT_MIDI_VELOCITY)
 149
 150     @event_handler(events.NOTEOFF)
 151     def noteoff(self, evt) :
 152         tone = evt.tone
 153         self.synth.noteoff(0, tone.midi)
 154
 155
 156 class SongPlayingScreen(_PlayingScreenBase) :
 157
 158     def __init__(self, synth, song, mode=PLAYING_MODES['NORMAL']) :
 159         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes)
 160         self.song = song
 161         self.currentColumn = None
 162         self.noteIterator = self.song.iterNotes()
 163         self.displayNext()
 164
 165     def displayNext(self) :
 166         if self.currentColumn:
 167             self.currentColumn.update(False)
 168         note, verseIndex = self.noteIterator.next()
 169         syllabus = note.lyrics[verseIndex].syllabus(encoding="iso-8859-1")
 170         column = self.columns[note.midi]
 171         column.update(True, syllabus)
 172         self.currentColumn = column
 173         self.currentNotePlayed = False
 174
 175     @event_handler(events.COLDOWN)
 176     def handleColumnDown(self, event) :
 177         col = event.column
 178         if col.state:
 179             self.synth.noteon(0, col.tone.midi, DEFAULT_MIDI_VELOCITY)
 180             self.currentNotePlayed = True
 181
 182     @event_handler(events.COLUP)
 183     def handleColumnUp(self, event) :
 184         if self.currentNotePlayed :
 185             self.synth.noteoff(0, self.currentColumn.tone.midi)
 186             self.displayNext()