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
  47     def _initRects(self) :
  48         """ création des espaces réservés pour
  49             afficher les colonnes.
  50         """
  51         #ambitus = self.distinctNotes[-1].midi - self.distinctNotes[0].midi
  52         #if ambitus <= 12 :
  53         #    self.keyboardLength = 8
  54         #else :
  55         #    self.keyboardLength = 11
  56         self.keyboardLength = len(self.distinctNotes)
  57
  58         screen = pygame.display.get_surface()
  59
  60         # taille de la zone d'affichage utile (bordure autour)
  61         dispWidth = screen.get_width() - 2 * BORDER
  62         dispHeight = screen.get_height() - 2 * BORDER
  63
  64         columnWidth = int(round(float(dispWidth) / self.keyboardLength))
  65
  66         rects = []
  67         for i in range(self.keyboardLength) :
  68             upperLeftCorner = (i*columnWidth + BORDER, BORDER)
  69             rect = pygame.Rect(upperLeftCorner, (columnWidth, dispHeight))
  70             rects.append(rect)
  71
  72         self.keyboardRects = rects
  73
  74     def _initColumns(self) :
  75
  76         hueStep = FIRST_HUE / (self.keyboardLength - 1)
  77         for i, rect in enumerate(self.keyboardRects) :
  78             hue = FIRST_HUE - hueStep * i
  79             tone = self.distinctNotes[i]
  80             c = Column(self, hue, rect, tone)
  81             self.add(c, layer=BACKGROUND_LAYER)
  82             self.columns[tone.midi] = c
  83
  84
  85     def _initCursor(self) :
  86         self.cursor = WarpingCursor(blinkMode=True)
  87         self.add(self.cursor, layer=CURSOR_LAYER)
  88
  89     def run(self):
  90         self._running = True
  91         clock = pygame.time.Clock()
  92         pygame.display.flip()
  93         pygame.mouse.set_visible(False)
  94         while self._running :
  95             EventDispatcher.dispatchEvents()
  96             dirty = self.draw(pygame.display.get_surface())
  97             pygame.display.update(dirty)
  98             clock.tick(FRAMERATE)
  99
 100         pygame.mouse.set_visible(True)
 101         self.cursor._stopBlink()
 102
 103     @event_handler(pygame.KEYDOWN)
 104     def handleKeyDown(self, event) :
 105         if event.key == pygame.K_q:
 106             self._running = False
 107
 108
 109 class PlayingScreen(_PlayingScreenBase) :
 110     "fenêtre de jeu pour improvisation"
 111
 112     scale = [55, 57, 59, 60, 62, 64, 65, 67, 69, 71, 72]
 113
 114     def __init__(self, synth) :
 115         distinctNotes = []
 116         for midi in self.scale :
 117             tone = Tone(midi)
 118             distinctNotes.append(tone)
 119
 120         super(PlayingScreen, self).__init__(synth, distinctNotes)
 121
 122     @event_handler(events.NOTEON)
 123     def noteon(self, evt) :
 124         tone = evt.tone
 125         self.synth.noteon(0, tone.midi, DEFAULT_MIDI_VELOCITY)
 126
 127     @event_handler(events.NOTEOFF)
 128     def noteoff(self, evt) :
 129         tone = evt.tone
 130         self.synth.noteoff(0, tone.midi)
 131
 132
 133 class SongPlayingScreen(_PlayingScreenBase) :
 134
 135     def __init__(self, synth, song, mode=PLAYING_MODES['NORMAL']) :
 136         super(SongPlayingScreen, self).__init__(synth, song.distinctNotes)
 137         self.song = song
 138         self.currentColumn = None
 139         self.noteIterator = self.song.iterNotes()
 140         self.displayNext()
 141
 142     def displayNext(self) :
 143         if self.currentColumn:
 144             self.currentColumn.update(False)
 145         note, verseIndex = self.noteIterator.next()
 146         syllabus = note.lyrics[verseIndex].syllabus(encoding="iso-8859-1")
 147         column = self.columns[note.midi]
 148         column.update(True, syllabus)
 149         self.currentColumn = column
 150
 151     @event_handler(events.KEYDOWN)
 152     def handleKeyDown(self, event) :
 153         col = event.column
 154         if col == self.currentColumn:
 155             self.synth.noteon(0, col.tone.midi, DEFAULT_MIDI_VELOCITY)
 156
 157     @event_handler(events.KEYUP)
 158     def handleKeyUp(self, event) :
 159         self.synth.noteoff(0, self.currentColumn.tone.midi)
 160         self.displayNext()
 161