naja/widgets/text.py

   1 import pygame
   2
   3 from naja.constants import FONT, FONT_SIZE
   4 from naja.widgets.base import Widget
   5 from naja.resources import resources
   6 from naja.utils import convert_colour
   7
   8
   9 class TextWidget(Widget):
  10     def __init__(self, pos, text, size=None, fontname=None, fontsize=None,
  11                  colour=None):
  12         super(TextWidget, self).__init__(pos, size)
  13
  14         self.text = text
  15         self.fontname = fontname or FONT
  16         self.fontsize = (fontsize or FONT_SIZE) // 4
  17         self.colour = convert_colour(colour or (0, 0, 0))
  18
  19     def prepare(self):
  20         self.font = resources.get_font(self.fontname, self.fontsize)
  21         text = self.font.render(self.text, True, self.colour)
  22         text_rect = text.get_rect()
  23         self.surface = pygame.transform.scale(text, (text_rect.width * 4,
  24                                                      text_rect.height * 4))
  25         self.size = self.surface.get_rect().size
  26
  27     def draw(self, surface):
  28         surface.blit(self.surface, self.pos)
  29
  30
  31 class TextBoxWidget(TextWidget):
  32     def __init__(self, *args, **kwargs):
  33         self.padding = kwargs.pop('padding', 5)
  34         self.border = kwargs.pop('border', 2)
  35         self.bg_colour = convert_colour(kwargs.pop('bg_colour',
  36                                                    (255, 255, 255, 192)))
  37         self.border_colour = convert_colour(kwargs.pop('border_colour',
  38                                                        (0, 0, 0)))
  39         self.box_width = kwargs.pop('box_width', 0)
  40
  41         super(TextBoxWidget, self).__init__(*args, **kwargs)
  42
  43     def lines(self):
  44         if self.box_width != 0:
  45             return self._wrapped_lines()
  46         else:
  47             return self.text.splitlines()
  48
  49     def _wrapped_lines(self):
  50         def words_fit(words):
  51             words_line = ' '.join(words)
  52             width = self.font.size(words_line)[0]
  53             if width < self.box_width:
  54                 return True
  55             elif len(words) == 1:
  56                 Exception("Word %r too long for box." % (words[0],))
  57             return False
  58
  59         for line in self.text.splitlines():
  60             current_words = []
  61             for word in line.split():
  62                 current_words.append(word)
  63                 if words_fit(current_words):
  64                     continue
  65                 else:
  66                     yield ' '.join(current_words[:-1])
  67                     current_words = current_words[-1:]
  68             if current_words and words_fit(current_words):
  69                 yield ' '.join(current_words)
  70
  71     def prepare(self):
  72         self.font = resources.get_font(self.fontname, self.fontsize)
  73         rendered_lines = []
  74         width, height = self.padding, self.padding
  75         for line in self.lines():
  76             line_surface = self.font.render(line, True, self.colour)
  77             line_rect = line_surface.get_rect()
  78             line_surface = pygame.transform.scale(
  79                 line_surface, (line_rect.width * 2, line_rect.height * 2))
  80             line_rect = line_surface.get_rect()
  81             rendered_lines.append(line_surface)
  82             width = max(width, line_rect.width)
  83             height += line_rect.height
  84
  85         self.surface = pygame.surface.Surface((width, height),
  86                                               pygame.locals.SRCALPHA)
  87         self.surface.fill(self.bg_colour)
  88         self.size = self.surface.get_rect().size
  89
  90         x, y = self.padding, self.padding
  91         for line_surface in rendered_lines:
  92             self.surface.blit(line_surface, (x, y))
  93             y += line_surface.get_rect().height
  94
  95     def draw(self, surface):
  96         surface.blit(self.surface, self.rect)