src/app/widgets/column.py

   1 # -*- coding: utf-8 -*-
   2 """
   3 bande qui compose le clavier minwii
   4
   5 $Id$
   6 $URL$
   7 """
   8 import pygame
   9 from colorsys import hls_to_rgb
  10 from gradients import gradients
  11 import events
  12 from eventutils import event_handler, EventDispatcher, EventHandlerMixin
  13 from math import floor
  14 from globals import BACKGROUND_LAYER
  15 from globals import FOREGROUND_LAYER
  16 from config import OFF_LUMINANCE
  17 from config import OFF_SATURATION
  18 from config import ON_TOP_LUMINANCE
  19 from config import ON_BOTTOM_LUMINANCE
  20 from config import ON_SATURATION
  21 from config import ON_COLUMN_OVERSIZING
  22 from config import ON_COLUMN_ALPHA
  23 from config import FONT
  24 from config import FONT_COLOR
  25
  26
  27 class Column(pygame.sprite.DirtySprite, EventHandlerMixin) :
  28
  29     def __init__(self, group, hue, rect, tone) :
  30         pygame.sprite.DirtySprite.__init__(self, group)
  31         self.state = False
  32
  33         # nom de l'intonation
  34         self.tone = tone
  35         toneName = FONT.render(tone.nom, True, FONT_COLOR)
  36
  37         # état off : surface unie et nom de l'intonation
  38         sur = pygame.surface.Surface(rect.size)
  39         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
  40         sur.fill(rgba)
  41         w, h = rect.w, rect.h
  42         tw, th, = toneName.get_size()
  43         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
  44         sur.blit(toneName, toneRect)
  45         self.surOff = sur
  46         self.rectOff = rect
  47
  48
  49         # état on : surface dégradée avec nom de la note avec largeur agrandie
  50         topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
  51         bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
  52         onWidth = rect.width * ON_COLUMN_OVERSIZING
  53         onLeft = rect.centerx - onWidth / 2
  54         rectOn = pygame.Rect((onLeft, 0),
  55                              (onWidth, rect.height))
  56         self.surOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
  57         w, h = rectOn.w, rectOn.h
  58         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
  59         self.surOn.blit(toneName, toneRect)
  60         self.rectOn = rectOn
  61
  62         self.image = self.surOff
  63         self.rect = rect
  64         #EventDispatcher.addEventListener(pygame.MOUSEBUTTONDOWN, self.onMouseDown)
  65         #EventDispatcher.addEventListener(pygame.MOUSEBUTTONUP, self.onMouseUp)
  66
  67     def update(self, state, syllabus='') :
  68         group = self.groups()[0]
  69         if state == self.state :
  70             # no changes
  71             return
  72         if state :
  73             group.change_layer(self, FOREGROUND_LAYER)
  74             sur = self.surOn
  75             if syllabus :
  76                 sur = sur.copy()
  77                 renderedSyl = FONT.render(syllabus, True, FONT_COLOR)
  78                 sw, sh, = renderedSyl.get_size()
  79                 w, h = self.rectOn.w, self.rectOn.h
  80                 sylRect = pygame.Rect(((w - sw) / 2, (h - sh) / 2), (sw, sh))
  81                 sur.blit(renderedSyl, sylRect)
  82
  83             self.image = sur
  84             self.rect = self.rectOn
  85         else :
  86             group.change_layer(self, BACKGROUND_LAYER)
  87             self.image = self.surOff
  88             self.rect = self.rectOff
  89         self.state = state
  90         self.dirty = 1
  91
  92     @event_handler(pygame.MOUSEBUTTONDOWN)
  93     def onMouseDown(self, event) :
  94         if self.rect.collidepoint(*event.pos) :
  95             self.update(True)
  96             self.raiseNoteOn()
  97
  98     @event_handler(pygame.MOUSEBUTTONUP)
  99     def onMouseUp(self, event) :
 100         self.update(False)
 101         self.raiseNoteOff()
 102
 103     def raiseNoteOn(self) :
 104         evt = pygame.event.Event(events.NOTEON, tone=self.tone)
 105         pygame.event.post(evt)
 106
 107     def raiseNoteOff(self) :
 108         evt = pygame.event.Event(events.NOTEOFF, tone=self.tone)
 109         pygame.event.post(evt)
 110
 111
 112
 113 def hls_to_rgba_8bits(h, l, s, a=1) :
 114     #convert to rgb ranging from 0 to 255
 115     rgba = [floor(255 * i) for i in hls_to_rgb(h, l, s) + (a,)]
 116     return tuple(rgba)