From 488402df7d37cf68d421229968632696a2a97bd7 Mon Sep 17 00:00:00 2001
From: Marco Pesenti Gritti <marco@localhost.localdomain>
Date: Wed, 06 Feb 2008 09:20:33 +0000
Subject: Split sugar-toolkit out of sugar shell.

---
(limited to 'sugar/graphics/style.py')

diff --git a/sugar/graphics/style.py b/sugar/graphics/style.py
new file mode 100644
index 0000000..1f97adc
--- /dev/null
+++ b/sugar/graphics/style.py
@@ -0,0 +1,147 @@
+# Copyright (C) 2007, Red Hat, Inc.
+#
+# 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. The
+factor for traditional 96 dpi screen is currently 0.72 which is the inverse
+of the one we are using to adapt web pages to the XO screen. It should be
+considered a reference value rather then a scale constant which has to be
+automatically applied and always respected.
+"""
+
+import os
+
+import gtk
+import pango
+
+_XO_DPI = 200.0
+
+_FOCUS_LINE_WIDTH = 2
+_TAB_CURVATURE = 1
+
+def _get_screen_dpi():
+    xft_dpi = gtk.settings_get_default().get_property('gtk-xft-dpi')
+    return float(xft_dpi / 1024)
+
+def _compute_zoom_factor():
+    if _get_screen_dpi() == 96.0:
+        if not os.environ.has_key('SUGAR_XO_STYLE') or \
+           not os.environ['SUGAR_XO_STYLE'] == 'yes':
+            return 0.72
+
+    return 1.0
+
+def _compute_font_height(font):
+    widget = gtk.Label('')
+
+    context = widget.get_pango_context()
+    pango_font = context.load_font(font.get_pango_desc())
+    metrics = pango_font.get_metrics()
+    
+    return pango.PIXELS(metrics.get_ascent() + metrics.get_descent())
+
+class Font(object):
+    def __init__(self, desc):
+        self._desc = desc
+
+    def __str__(self):
+        return self._desc
+
+    def get_pango_desc(self):
+        return pango.FontDescription(self._desc)
+
+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)
+
+FONT_SIZE = zoom(7 * _XO_DPI / _get_screen_dpi())
+FONT_NORMAL = Font('Bitstream Vera Sans %d' % FONT_SIZE)
+FONT_BOLD = Font('Bitstream Vera Sans bold %d' % FONT_SIZE)
+FONT_NORMAL_H = _compute_font_height(FONT_NORMAL)
+FONT_BOLD_H = _compute_font_height(FONT_BOLD)
+
+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('#404040')
+COLOR_BUTTON_GREY = Color('#808080')
+COLOR_INACTIVE_FILL = Color('#9D9FA1')
+COLOR_INACTIVE_STROKE = Color('#757575')
+COLOR_TEXT_FIELD_GREY = Color('#E5E5E5')
+
+PALETTE_CURSOR_DISTANCE = zoom(10)
--
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