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 gradients import gradients
  10 from math import floor
  11 from globals import BACKGROUND_LAYER
  12 from globals import FOREGROUND_LAYER
  13 from globals import hls_to_rgba_8bits
  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 LYRICS_FONT, NOTES_FONT
  22 from config import FONT_COLOR
  23 import events
  24
  25
  26 class Column(pygame.sprite.DirtySprite) :
  27
  28     def __init__(self, group, hue, rect, tone) :
  29         pygame.sprite.DirtySprite.__init__(self, group)
  30         self.state = False
  31
  32         # nom de l'intonation
  33         self.tone = tone
  34         toneName = NOTES_FONT.render(tone.nom, True, FONT_COLOR)
  35
  36         # état off : surface unie et nom de l'intonation
  37         sur = pygame.surface.Surface(rect.size)
  38         rgba = hls_to_rgba_8bits(hue, OFF_LUMINANCE, OFF_SATURATION)
  39         sur.fill(rgba)
  40         w, h = rect.w, rect.h
  41         tw, th, = toneName.get_size()
  42         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
  43         sur.blit(toneName, toneRect)
  44         self.surOff = sur
  45         self.rectOff = rect
  46
  47
  48         # état on : surface dégradée avec nom de la note avec largeur agrandie
  49         topRgba = hls_to_rgba_8bits(hue, ON_TOP_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
  50         bottomRgba = hls_to_rgba_8bits(hue, ON_BOTTOM_LUMINANCE, ON_SATURATION, ON_COLUMN_ALPHA)
  51         onWidth = rect.width * ON_COLUMN_OVERSIZING
  52         onLeft = rect.centerx - onWidth / 2
  53         rectOn = pygame.Rect((onLeft, 0),
  54                              (onWidth, rect.height))
  55         self.surOn = gradients.vertical(rectOn.size, topRgba, bottomRgba)
  56         w, h = rectOn.w, rectOn.h
  57         toneRect = pygame.Rect(((w - tw) / 2, h - th), (tw, th))
  58         self.surOn.blit(toneName, toneRect)
  59         self.rectOn = rectOn
  60
  61         self.image = self.surOff
  62         self.rect = rect
  63
  64     def update(self, state, syllabus='') :
  65         group = self.groups()[0]
  66         if state == self.state :
  67             # no changes
  68             return
  69         if state :
  70             group.change_layer(self, FOREGROUND_LAYER)
  71             sur = self.surOn
  72             if syllabus :
  73                 sur = sur.copy()
  74                 rect = self.rectOn
  75                 renderedSyl = LYRICS_FONT.render(syllabus, True, FONT_COLOR)
  76                 sw, sh, = renderedSyl.get_size()
  77                 w, h = self.rectOn.w, self.rectOn.h
  78
  79                 if sw > self.rectOn.w :
  80                     sur = pygame.transform.scale(sur, (sw, h))
  81                     rect = rect.inflate(sw - w, 0)
  82                     w = sw
  83
  84                 screenWidth = group.dispWidth
  85                 if rect.left < 0 :
  86                     rect.left = 0
  87                 elif rect.right > screenWidth :
  88                     rect.right = screenWidth
  89
  90                 sylRect = pygame.Rect(((w - sw) / 2, (h - sh) / 2), (sw, sh))
  91                 sur.blit(renderedSyl, sylRect)
  92
  93             self.image = sur
  94             self.rect = rect
  95         else :
  96             group.change_layer(self, BACKGROUND_LAYER)
  97             self.image = self.surOff
  98             self.rect = self.rectOff
  99
 100         self.state = state
 101         self.dirty = 1
 102
 103         evt = pygame.event.Event(events.COLSTATECHANGE, col=self, state=state, syllabus=syllabus)
 104         pygame.event.post(evt)