Finally drop obsolete units.

sugar/graphics/Makefile.am

@@ -23,6 +23,5 @@ sugar_PYTHON =			\
 	toolbox.py		\
 	toolbutton.py		\
 	toolcombobox.py		\
-	units.py		\
 	window.py		\
 	xocolor.py

sugar/graphics/canvasicon.py

@@ -27,7 +27,6 @@ import time
 
 from sugar.graphics.xocolor import XoColor
 from sugar.graphics import style
-from sugar.graphics import units
 from sugar.graphics.palette import Palette, CanvasInvoker
 
 class _IconCacheIcon:

sugar/graphics/units.py

@@ -1,96 +0,0 @@
-# Copyright (C) 2006-2007 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.
-
-""" Units conversions and constants
-
-The purpose of the module is to keep Sugar independent from the
-screen size, factory and DPI. There a few use cases that needs
-to be considered:
-
-  - The XO display. The screen DPI is 201 and the screen
-    resolution is 1200x900. The screen factor is 4:3.
-  - The Sugar emulator runned on traditional screens. Resolution
-    is variable, ranging from 800x600 up to 1200x900. The DPI
-    is usually but not necessarily 96. The screen factor is
-    either 4:3 or 16:9
-  - Other embedded devices. DPI, screen resolution and screen
-    factor are variable.
-
-To achieve the goal a few rules needs to be respected when
-writing code for Sugar:
-
-  - Never use absolute positioning. Use the layout facilities
-    provided by HippoCanvas. If you need custom layouts make
-    sure they adapt to different screen resolutions.
-  - Never specify sizes, fonts, borders or padding using pixels.
-    Instead use the device independt units provided by this
-    module.
-
-We are currently providing the following resolution independent
-units:
-
-  - Points.
-  - Grid. One cell of the screen grid as specificed by the HIG.
-  - Microgrid. One microcell of the screen grid as
-    specificed by the HIG.
-  - A set of icon sizes as specified by the HIG (standard, small,
-    medium, large, xlarge).
-
-Just scaling UI elements on the base of the screen DPI is not
-enough to provide a good experience. For example on smaller
-screens smaller fonts or icons might be acceptable to gain
-screen aestate. For this reason a constant zoom factor is
-applied to all the transformation from resolution independent
-units to device units.
-
-"""
-
-import gtk
-
-_XO_DPI = 200.0
-_MAX_ZOOM_FACTOR = 2.0
-_ZOOM_CONSTANT   = 650.0
-
-def _compute_zoom_factor():
-    screen_width = gtk.gdk.screen_width()
-    if _screen_dpi == _XO_DPI and screen_width == 1200:
-        return 1.0
-    else:
-        return min(_MAX_ZOOM_FACTOR, screen_width / _ZOOM_CONSTANT)
-
-_gtk_xft_dpi = gtk.settings_get_default().get_property('gtk-xft-dpi')
-_screen_dpi = float(_gtk_xft_dpi / 1024)
-_dpi_factor  = _screen_dpi / _XO_DPI
-_zoom_factor = _compute_zoom_factor()
-
-STANDARD_ICON_SCALE = 1.0 * _dpi_factor * _zoom_factor
-SMALL_ICON_SCALE    = 0.5 * _dpi_factor * _zoom_factor
-MEDIUM_ICON_SCALE   = 1.5 * _dpi_factor * _zoom_factor
-LARGE_ICON_SCALE    = 2.0 * _dpi_factor * _zoom_factor
-XLARGE_ICON_SCALE   = 2.75 * _dpi_factor * _zoom_factor
-
-def points_to_device(points):
-    return int(points * _zoom_factor)
-
-def points_to_pixels(points):
-    return int(points * _screen_dpi / 72.0 * _zoom_factor)
-
-def grid_to_pixels(units):
-    return int(units * 75.0 * _dpi_factor * _zoom_factor)
-
-def microgrid_to_pixels(units):
-    return int(units * 15.0 * _dpi_factor * _zoom_factor)