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# Copyright (C) 2007, Red Hat, Inc.
# Copyright (C) 2010, Plan Ceibal <comunidad@plan.ceibal.edu.uy>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# 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.
"""
All the constants are expressed in pixels. They are defined for the XO screen
and are usually adapted to different resolution by applying a zoom factor.
STABLE.
"""
import os
import logging
import gtk
import pango
import gconf
FOCUS_LINE_WIDTH = 2
_TAB_CURVATURE = 1
def _compute_zoom_factor():
try:
scaling = int(os.environ.get('SUGAR_SCALING', '100'))
return scaling / 100.0
except ValueError:
logging.error('Invalid SUGAR_SCALING.')
return 1.0
class Font(object):
"""High level font information."""
def __init__(self, desc=None):
"""Constructor.
Keyword arguments:
desc -- string with font description
"""
default_context = gtk.Label().get_pango_context()
if desc is None:
self._desc = default_context.get_font_description()
else:
self._desc = pango.FontDescription(desc)
metrics = default_context.get_metrics(self._desc)
self._char_width = max(metrics.get_approximate_char_width(),
metrics.get_approximate_digit_width()) / pango.SCALE
def __str__(self):
return self._desc.to_string()
def get_pango_desc(self):
"""Returns pango font description object."""
return self._desc
pango_desc = property(get_pango_desc)
def get_char_width(self):
"""Approximate char width.
This is merely a representative value that is useful, for example, for
determining the initial size for a window. Actual characters in text
will be wider and narrower than this.
"""
return self._char_width
char_width = property(get_char_width)
class Color(object):
def __init__(self, color, alpha=1.0):
self._r, self._g, self._b = self._html_to_rgb(color)
self._a = alpha
def get_rgba(self):
return (self._r, self._g, self._b, self._a)
def get_int(self):
return int(self._a * 255) + (int(self._b * 255) << 8) + \
(int(self._g * 255) << 16) + (int(self._r * 255) << 24)
def get_gdk_color(self):
return gtk.gdk.Color(int(self._r * 65535), int(self._g * 65535),
int(self._b * 65535))
def get_html(self):
return '#%02x%02x%02x' % (self._r * 255, self._g * 255, self._b * 255)
def _html_to_rgb(self, html_color):
""" #RRGGBB -> (r, g, b) tuple (in float format) """
html_color = html_color.strip()
if html_color[0] == '#':
html_color = html_color[1:]
if len(html_color) != 6:
raise ValueError('input #%s is not in #RRGGBB format' % html_color)
r, g, b = html_color[:2], html_color[2:4], html_color[4:]
r, g, b = [int(n, 16) for n in (r, g, b)]
r, g, b = (r / 255.0, g / 255.0, b / 255.0)
return (r, g, b)
def get_svg(self):
if self._a == 0.0:
return 'none'
else:
return self.get_html()
def zoom(units):
return int(ZOOM_FACTOR * units)
ZOOM_FACTOR = _compute_zoom_factor()
DEFAULT_SPACING = zoom(15)
DEFAULT_PADDING = zoom(6)
GRID_CELL_SIZE = zoom(75)
LINE_WIDTH = zoom(2)
STANDARD_ICON_SIZE = zoom(55)
SMALL_ICON_SIZE = zoom(55 * 0.5)
MEDIUM_ICON_SIZE = zoom(55 * 1.5)
LARGE_ICON_SIZE = zoom(55 * 2.0)
XLARGE_ICON_SIZE = zoom(55 * 2.75)
client = gconf.client_get_default()
THEME = client.get_string('/desktop/sugar/interface/gtk_theme')
FONT_SIZE = client.get_float('/desktop/sugar/font/default_size')
FONT_FACE = client.get_string('/desktop/sugar/font/default_face')
FONT_DEFAULT = Font()
FONT_NORMAL = Font('%s %f' % (FONT_FACE, FONT_SIZE))
FONT_BOLD = Font('%s bold %f' % (FONT_FACE, FONT_SIZE))
FONT_NORMAL_H = zoom(24)
FONT_BOLD_H = zoom(24)
TOOLBOX_SEPARATOR_HEIGHT = zoom(9)
TOOLBOX_HORIZONTAL_PADDING = zoom(75)
TOOLBOX_TAB_VBORDER = int((zoom(36) - FONT_NORMAL_H - FOCUS_LINE_WIDTH) / 2)
TOOLBOX_TAB_HBORDER = zoom(15) - FOCUS_LINE_WIDTH - _TAB_CURVATURE
TOOLBOX_TAB_LABEL_WIDTH = zoom(150 - 15 * 2)
COLOR_BLACK = Color('#000000')
COLOR_WHITE = Color('#FFFFFF')
COLOR_TRANSPARENT = Color('#FFFFFF', alpha=0.0)
COLOR_PANEL_GREY = Color('#C0C0C0')
COLOR_SELECTION_GREY = Color('#A6A6A6')
COLOR_TOOLBAR_GREY = Color('#282828')
COLOR_BUTTON_GREY = Color('#808080')
COLOR_INACTIVE_FILL = Color('#9D9FA1')
COLOR_INACTIVE_STROKE = Color('#757575')
COLOR_TEXT_FIELD_GREY = Color('#E5E5E5')
COLOR_HIGHLIGHT = Color('#E7E7E7')
if (THEME == 'sugar-contrast'):
COLOR_DESKTOP_ICON = Color('#000033')
COLOR_BG_CP = Color('#000033')
else:
COLOR_DESKTOP_ICON = Color('#808080')
COLOR_BG_CP = Color('#FFFFFF')
PALETTE_CURSOR_DISTANCE = zoom(10)
TOOLBAR_ARROW_SIZE = zoom(24)
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