src/minwii/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 math import floor
  10 import minwii.gradients as gradients
  11 from minwii.globals import BACKGROUND_LAYER
  12 from minwii.globals import FOREGROUND_LAYER
  13 from minwii.globals import hls_to_rgba_8bits
  14 from minwii.config import OFF_LUMINANCE
  15 from minwii.config import OFF_SATURATION
  16 from minwii.config import ON_TOP_LUMINANCE
  17 from minwii.config import ON_BOTTOM_LUMINANCE
  18 from minwii.config import ON_SATURATION
  19 from minwii.config import ON_COLUMN_OVERSIZING
  20 from minwii.config import ON_COLUMN_ALPHA
  21 from minwii.config import LYRICS_FONT, NOTES_FONT
  22 from minwii.config import FONT_COLOR
  23 import minwii.events as events
  24
  25
  26 class Column(pygame.sprite.DirtySprite) :
  27     ''' colonne utilisée pour l'affichage d'une touche du clavier de jeu.
  28     '''
  29
  30     def __init__(self, group, index, hue, rect, tone) :
  31         pygame.sprite.DirtySprite.__init__(self, group)
  32         self.index = index
  33         self.state = False
  34
  35         # nom de l'intonation
  36         self.tone = tone
  37         toneName = NOTES_FONT.render(tone.nom, True, FONT_COLOR)
  38
  39         # état off : surface unie et nom de l'intonation
  40         sur = pygame.surface.Surface(rect.size)
  41         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
  42         sur.fill(rgba)
  43         w, h = rect.w, rect.h
  44         tw, th, = toneName.get_size()
  45         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
  46         sur.blit(toneName, toneRect)
  47         self.surOff = sur
  48         self.rectOff = rect
  49
  50
  51         # état on : surface dégradée avec nom de la note avec largeur agrandie
  52         topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
  53         bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
  54         onWidth = rect.width * ON_COLUMN_OVERSIZING
  55         onLeft = rect.centerx - onWidth / 2
  56         rectOn = pygame.Rect((onLeft, 0),
  57                              (onWidth, rect.height))
  58         self.surOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
  59         w, h = rectOn.w, rectOn.h
  60         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
  61         self.surOn.blit(toneName, toneRect)
  62         self.rectOn = rectOn
  63
  64         self.image = self.surOff
  65         self.rect = rect
  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             rect = self.rectOn
  76             if syllabus :
  77                 sur = sur.copy()
  78                 renderedSyl = LYRICS_FONT.render(syllabus, True, FONT_COLOR)
  79                 sw, sh, = renderedSyl.get_size()
  80                 w, h = self.rectOn.w, self.rectOn.h
  81
  82                 if sw > self.rectOn.w :
  83                     sur = pygame.transform.scale(sur, (sw, h))
  84                     rect = rect.inflate(sw - w, 0)
  85                     w = sw
  86
  87                 screenWidth = group.dispWidth
  88                 if rect.left < 0 :
  89                     rect.left = 0
  90                 elif rect.right > screenWidth :
  91                     rect.right = screenWidth
  92
  93                 sylRect = pygame.Rect(((w - sw) / 2, (h - sh) / 2), (sw, sh))
  94                 sur.blit(renderedSyl, sylRect)
  95
  96             self.image = sur
  97             self.rect = rect
  98         else :
  99             group.change_layer(self, BACKGROUND_LAYER)
 100             self.image = self.surOff
 101             self.rect = self.rectOff
 102
 103         self.state = state
 104         self.dirty = 1
 105
 106         evt = pygame.event.Event(events.COLSTATECHANGE, column=self, state=state, syllabus=syllabus)
 107         pygame.event.post(evt)