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 from math import floor
  12 from globals import BACKGROUND_LAYER
  13 from globals import FOREGROUND_LAYER
  14 from config import OFF_LUMINANCE
  15 from config import OFF_SATURATION
  16 from config import ON_TOP_LUMINANCE
  17 from config import ON_BOTTOM_LUMINANCE
  18 from config import ON_SATURATION
  19 from config import ON_COLUMN_OVERSIZING
  20 from config import ON_COLUMN_ALPHA
  21 from config import FONT
  22 from config import FONT_COLOR
  23
  24
  25 class Column(pygame.sprite.DirtySprite) :
  26
  27     def __init__(self, group, hue, rect, tone) :
  28         pygame.sprite.DirtySprite.__init__(self, group)
  29         self.state = False
  30
  31         # nom de l'intonation
  32         self.tone = tone
  33         toneName = FONT.render(tone.nom, True, FONT_COLOR)
  34
  35         # état off : surface unie et nom de l'intonation
  36         sur = pygame.surface.Surface(rect.size)
  37         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
  38         sur.fill(rgba)
  39         w, h = rect.w, rect.h
  40         tw, th, = toneName.get_size()
  41         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
  42         sur.blit(toneName, toneRect)
  43         self.surOff = sur
  44         self.rectOff = rect
  45
  46
  47         # état on : surface dégradée avec nom de la note avec largeur agrandie
  48         topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
  49         bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
  50         onWidth = rect.width * ON_COLUMN_OVERSIZING
  51         onLeft = rect.centerx - onWidth / 2
  52         rectOn = pygame.Rect((onLeft, 0),
  53                              (onWidth, rect.height))
  54         self.surOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
  55         w, h = rectOn.w, rectOn.h
  56         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
  57         self.surOn.blit(toneName, toneRect)
  58         self.rectOn = rectOn
  59
  60         self.image = self.surOff
  61         self.rect = rect
  62
  63     def update(self, state, syllabus='') :
  64         group = self.groups()[0]
  65         if state == self.state :
  66             # no changes
  67             return
  68         if state :
  69             group.change_layer(self, FOREGROUND_LAYER)
  70             sur = self.surOn
  71             if syllabus :
  72                 sur = sur.copy()
  73                 renderedSyl = FONT.render(syllabus, True, FONT_COLOR)
  74                 sw, sh, = renderedSyl.get_size()
  75                 w, h = self.rectOn.w, self.rectOn.h
  76                 sylRect = pygame.Rect(((w - sw) / 2, (h - sh) / 2), (sw, sh))
  77                 sur.blit(renderedSyl, sylRect)
  78
  79             self.image = sur
  80             self.rect = self.rectOn
  81         else :
  82             group.change_layer(self, BACKGROUND_LAYER)
  83             self.image = self.surOff
  84             self.rect = self.rectOff
  85         self.state = state
  86         self.dirty = 1
  87
  88
  89 def hls_to_rgba_8bits(h, l, s, a=1) :
  90     #convert to rgb ranging from 0 to 255
  91     rgba = [floor(255 * i) for i in hls_to_rgb(h, l, s) + (a,)]
  92     return tuple(rgba)