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# -*- coding: utf-8 -*-
#Copyright (c) 2011, Walter Bender, Paulina Clares, Chris Rowe
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
from sprites import Sprite
from svg_utils import svg_header, svg_footer, svg_rect, svg_str_to_pixbuf
from gettext import gettext as _
BAR_HEIGHT = 25
class Bar():
''' The Bar class is used to define the bars at the bottom of the
screen '''
def __init__(self, sprites, width, height, scale, size):
''' Initialize the 2-segment bar, labels, and mark '''
self.sprites = sprites
self.bars = {}
self.screen_width = width
self.screen_height = height
self.scale = scale
self.ball_size = size
self.make_bar(2)
self.make_mark()
self.make_labels()
def make_mark(self):
''' Make a mark to show the fraction position on the bar. '''
mark = svg_header(self.ball_size / 2.,
BAR_HEIGHT * self.scale + 4, 1.0) + \
svg_rect(self.ball_size / 2.,
BAR_HEIGHT * self.scale + 4, 0, 0, 0, 0,
'#FF0000', '#FF0000') + \
svg_rect(1, BAR_HEIGHT * self.scale + 4, 0, 0,
self.ball_size / 4., 0, '#000000', '#000000') + \
svg_footer()
self.mark = Sprite(self.sprites, 0,
self.screen_height, # hide off bottom of screen
svg_str_to_pixbuf(mark))
self.mark.set_layer(2)
def mark_width(self):
return self.mark.rect[2]
def bar_x(self):
return self.bars[2].get_xy()[0]
def bar_y(self):
return self.bars[2].get_xy()[1]
def width(self):
return self.bars[2].rect[2]
def height(self):
return self.bars[2].rect[3]
def hide_bars(self):
''' Hide all of the bars '''
for bar in self.bars:
self.bars[bar].set_layer(-1)
def make_labels(self):
''' Label the bar '''
num = svg_header(BAR_HEIGHT * self.scale, BAR_HEIGHT * self.scale,
1.0) + \
svg_rect(BAR_HEIGHT * self.scale, BAR_HEIGHT * self.scale,
0, 0, 0, 0, 'none', 'none') + \
svg_footer()
self.left = Sprite(self.sprites, int(self.ball_size / 4),
self.bar_y(), svg_str_to_pixbuf(num))
self.left.set_label(_('0'))
self.right = Sprite(self.sprites,
self.screen_width - int(self.ball_size / 2),
self.bar_y(), svg_str_to_pixbuf(num))
self.right.set_label(_('1'))
def get_bar(self, nsegments):
''' Return a bar with n segments '''
if nsegments not in self.bars:
self.make_bar(nsegments)
return self.bars[nsegments]
def make_bar(self, nsegments):
''' Create a bar with n segments '''
svg = svg_header(self.screen_width - self.ball_size, BAR_HEIGHT, 1.0)
dx = (self.screen_width - self.ball_size) / float(nsegments)
for i in range(int(nsegments) / 2):
svg += svg_rect(dx, BAR_HEIGHT * self.scale, 0, 0,
i * 2 * dx, 0, '#FFFFFF', '#FFFFFF')
svg += svg_rect(dx, BAR_HEIGHT * self.scale, 0, 0,
(i * 2 + 1) * dx, 0, '#AAAAAA', '#AAAAAA')
if int(nsegments) % 2 == 1: # odd
svg += svg_rect(dx, BAR_HEIGHT * self.scale, 0, 0,
(i * 2 + 2) * dx, 0, '#FFFFFF', '#FFFFFF')
svg += svg_footer()
self.bars[nsegments] = Sprite(self.sprites, 0, 0,
svg_str_to_pixbuf(svg))
self.bars[nsegments].move(
(int(self.ball_size / 2), self.screen_height - \
int((self.ball_size + self.height()) / 2)))
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