New project

author: Walter Bender <walter@sugarlabs.org> 2010-04-02 16:27:20 (GMT)
committer: Walter Bender <walter@sugarlabs.org> 2010-04-02 16:27:20 (GMT)
commit: 8162f477074c485f417ffc7e5b2eb0f1022d3068 (patch)
tree: af0ee443b1537019e5743cf40aa70c93ca80b0ae
23 files changed, 2770 insertions, 0 deletions
diff --git a/.abacusrc b/.abacusrc
new file mode 100644
index 0000000..9373b51
--- /dev/null
+++ b/.abacusrc
@@ -0,0 +1,4 @@
+50
+50
+800
+550
diff --git a/AbacusActivity.py b/AbacusActivity.py
new file mode 100644
index 0000000..fd5f7e2
--- /dev/null
+++ b/AbacusActivity.py
@@ -0,0 +1,235 @@
+# -*- coding: utf-8 -*-
+#Copyright (c) 2010, Walter Bender
+
+# 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.
+
+import pygtk
+pygtk.require('2.0')
+import gtk
+import gobject
+
+import sugar
+from sugar.activity import activity
+try: # 0.86+ toolbar widgets
+    from sugar.bundle.activitybundle import ActivityBundle
+    from sugar.activity.widgets import ActivityToolbarButton
+    from sugar.activity.widgets import StopButton
+    from sugar.graphics.toolbarbox import ToolbarBox
+    from sugar.graphics.toolbarbox import ToolbarButton
+except ImportError:
+    pass
+from sugar.graphics.toolbutton import ToolButton
+from sugar.graphics.menuitem import MenuItem
+from sugar.graphics.icon import Icon
+from sugar.datastore import datastore
+
+from gettext import gettext as _
+import locale
+import os.path
+
+import logging
+_logger = logging.getLogger("abacus-activity")
+
+from abacus_window import Abacus
+
+#
+# Sugar activity
+#
+class AbacusActivity(activity.Activity):
+
+    def __init__(self, handle):
+        super(AbacusActivity,self).__init__(handle)
+
+        try:
+            # Use 0.86 toolbar design
+            toolbar_box = ToolbarBox()
+
+            # Buttons added to the Activity toolbar
+            activity_button = ActivityToolbarButton(self)
+            toolbar_box.toolbar.insert(activity_button, 0)
+            activity_button.show()
+
+            # Suanpan (Chinese abacus) 2:5
+            self.chinese = ToolButton( "Con" )
+            self.chinese.set_tooltip(_('suanpan'))
+            self.chinese.props.sensitive = True
+            self.chinese.connect('clicked', self._chinese_cb)
+            toolbar_box.toolbar.insert(self.chinese, -1)
+            self.chinese.show()
+
+            # Soroban (Japanese abacus) 1:4
+            self.japanese = ToolButton( "Joff" )
+            self.japanese.set_tooltip(_('soroban'))
+            self.japanese.props.sensitive = True
+            self.japanese.connect('clicked', self._japanese_cb)
+            toolbar_box.toolbar.insert(self.japanese, -1)
+            self.japanese.show()
+
+            # Schety (Russian abacus) 0:10
+            self.russian = ToolButton( "Roff" )
+            self.russian.set_tooltip(_('schety'))
+            self.russian.props.sensitive = True
+            self.russian.connect('clicked', self._russian_cb)
+            toolbar_box.toolbar.insert(self.russian, -1)
+            self.russian.show()
+
+            separator = gtk.SeparatorToolItem()
+            separator.props.draw = False
+            separator.set_expand(True)
+            separator.show()
+            toolbar_box.toolbar.insert(separator, -1)
+
+            # The ever-present Stop Button
+            stop_button = StopButton(self)
+            stop_button.props.accelerator = '<Ctrl>Q'
+            toolbar_box.toolbar.insert(stop_button, -1)
+            stop_button.show()
+
+            self.set_toolbar_box(toolbar_box)
+            toolbar_box.show()
+
+        except NameError:
+            # Use pre-0.86 toolbar design
+            self.toolbox = activity.ActivityToolbox(self)
+            self.set_toolbox(self.toolbox)
+
+            self.projectToolbar = ProjectToolbar(self)
+            self.toolbox.add_toolbar( _('Project'), self.projectToolbar )
+
+            self.toolbox.show()
+
+        # Create a canvas
+        canvas = gtk.DrawingArea()
+        canvas.set_size_request(gtk.gdk.screen_width(), \
+                                gtk.gdk.screen_height())
+        self.set_canvas(canvas)
+        canvas.show()
+        self.show_all()
+
+        # Initialize the canvas
+        self.abacus = Abacus(canvas, os.path.join(activity.get_bundle_path(),
+                                                  'images/'), self)
+
+        """
+        # Read the slider positions from the Journal
+        try:
+            self.tw.A.spr.move_relative((int(self.metadata['A']),0))
+            self.tw.C.spr.move_relative((int(self.metadata['C']),0))
+            self.tw.C_tab_left.spr.move_relative((int(self.metadata['C']),0))
+            self.tw.C_tab_right.spr.move_relative((int(self.metadata['C'])+\
+                                                   SWIDTH-100,0))
+            self.tw.D.spr.move_relative((int(self.metadata['D']),0))
+            self.tw.R.spr.move_relative((int(self.metadata['R']),0))
+            self.tw.R_tab_top.spr.move_relative((int(self.metadata['R']),0))
+            self.tw.R_tab_bot.spr.move_relative((int(self.metadata['R']),0))
+            self.tw.slider_on_top = self.metadata['slider']
+            if self.tw.slider_on_top == 'A':
+                self._show_a()
+            else:
+                self._show_c()
+            window._update_results_label(self.tw)
+            window._update_slider_labels(self.tw)
+        except:
+            self._show_c()
+        """
+
+    def _chinese_cb(self, button):
+        self._show_c()
+        return True
+
+    def _show_c(self):
+        self.chinese.set_icon("Con")
+        self.japanese.set_icon("Joff")
+        self.russian.set_icon("Roff")
+        self.abacus.chinese.show()
+        self.abacus.japanese.hide()
+        self.abacus.russian.hide()
+        self.abacus.mode = self.abacus.chinese
+
+    def _japanese_cb(self, button):
+        self._show_j()
+        return True
+
+    def _show_j(self):
+        self.chinese.set_icon("Coff")
+        self.japanese.set_icon("Jon")
+        self.russian.set_icon("Roff")
+        self.abacus.chinese.hide()
+        self.abacus.japanese.show()
+        self.abacus.russian.hide()
+        self.abacus.mode = self.abacus.japanese
+
+    def _russian_cb(self, button):
+        self._show_r()
+        return True
+
+    def _show_r(self):
+        self.chinese.set_icon("Coff")
+        self.japanese.set_icon("Joff")
+        self.russian.set_icon("Ron")
+        self.abacus.chinese.hide()
+        self.abacus.japanese.hide()
+        self.abacus.russian.show()
+        self.abacus.mode = self.abacus.russian
+
+    """
+    Write the slider positions to the Journal
+    """
+    """
+    def write_file(self, file_path):
+        _logger.debug("Write slider on top: " + self.tw.slider_on_top)
+        self.metadata['slider'] = self.tw.slider_on_top
+        x,y = self.tw.A.spr.get_xy()
+        _logger.debug("Write A offset: " + str(x))
+        self.metadata['A'] = str(x)
+        x,y = self.tw.C.spr.get_xy()
+        _logger.debug("Write C offset: " + str(x))
+        self.metadata['C'] = str(x)
+        x,y = self.tw.D.spr.get_xy()
+        _logger.debug("Write D offset: " + str(x))
+        self.metadata['D'] = str(x)
+        x,y = self.tw.R.spr.get_xy()
+        _logger.debug("Write r offset: " + str(x))
+        self.metadata['R'] = str(x)
+    """
+
+#
+# Project toolbar for pre-0.86 toolbars
+#
+class ProjectToolbar(gtk.Toolbar):
+
+    def __init__(self, pc):
+        gtk.Toolbar.__init__(self)
+        self.activity = pc
+
+        # Chinese style
+        self.activity.chinese = ToolButton( "Con" )
+        self.activity.chinese.set_tooltip(_('saunpan'))
+        self.activity.chinese.props.sensitive = True
+        self.activity.chinese.connect('clicked', self.activity._chinese_cb)
+        self.insert(self.activity.chinese, -1)
+        self.activity.chinese.show()
+
+        # Japanese style
+        self.activity.japanese = ToolButton( "Joff" )
+        self.activity.japanese.set_tooltip(_('soroban'))
+        self.activity.japanese.props.sensitive = True
+        self.activity.japanese.connect('clicked', self.activity._japanese_cb)
+        self.insert(self.activity.japanese, -1)
+        self.activity.japanese.show()
+
+        # Russian style
+        self.activity.russian = ToolButton( "Roff" )
+        self.activity.russian.set_tooltip(_('schety'))
+        self.activity.russian.props.sensitive = True
+        self.activity.russian.connect('clicked', self.activity._russian_cb)
+        self.insert(self.activity.russian, -1)
+        self.activity.russian.show()
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..fb332e0
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,12 @@
+Copyright (c) 2010, Walter Bender
+
+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.
+
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..eb3d224
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,6 @@
+1
+
+* Abacus activity
+* Chinese (suanpan), Japanese (soroban), and Russian (schety) models
+
+
diff --git a/abacus.py b/abacus.py
new file mode 100755
index 0000000..098e73b
--- /dev/null
+++ b/abacus.py
@@ -0,0 +1,161 @@
+#!/usr/bin/env python
+
+#Copyright (c) 2010, Walter Bender
+
+# 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.
+
+import pygtk
+pygtk.require('2.0')
+import gtk
+
+from gettext import gettext as _
+import os
+
+from abacus_window import Abacus
+
+def makepath(path):
+    """ Make a path if it doesn't previously exist """
+    from os import makedirs
+    from os.path import normpath, dirname, exists
+
+    dpath = normpath(dirname(path))
+    if not exists(dpath):
+        makedirs(dpath)
+
+class AbacusMain:
+    def __init__(self):
+        self.r = 0
+        self.tw = None
+
+        self.win = gtk.Window(gtk.WINDOW_TOPLEVEL)
+        try:
+            data_file = open('.abacusrc', 'r')
+        except IOError:
+            data_file = open('.abacusrc', 'a+')
+            data_file.write(str(50)+'\n')
+            data_file.write(str(50)+'\n')
+            data_file.write(str(800)+'\n')
+            data_file.write(str(550)+'\n')
+            data_file.seek(0)
+        self.x = int(data_file.readline())
+        self.y = int(data_file.readline())
+        self.width = int(data_file.readline())
+        self.height = int(data_file.readline())
+        self.win.set_default_size(self.width, self.height)
+        self.win.move(self.x, self.y)
+        self.win.maximize()
+        self.win.set_title(_("Abacus"))
+        self.win.connect("delete_event", lambda w,e: gtk.main_quit())
+
+        menu = gtk.Menu()
+        menu_items = gtk.MenuItem(_("Saunpan"))
+        menu.append(menu_items)
+        menu_items.connect("activate", self._c_cb)
+        menu_items.show()
+        menu_items = gtk.MenuItem(_("Soroban"))
+        menu.append(menu_items)
+        menu_items.connect("activate", self._j_cb)
+        menu_items.show()
+        menu_items = gtk.MenuItem(_("Schety"))
+        menu.append(menu_items)
+        menu_items.connect("activate", self._r_cb)
+        menu_items.show()
+        menu_items = gtk.MenuItem(_("Quit"))
+        menu.append(menu_items)
+        menu_items.connect("activate", self.destroy)
+        menu_items.show()
+        root_menu = gtk.MenuItem("Tools")
+        root_menu.show()
+        root_menu.set_submenu(menu)
+
+        # A vbox to put a menu and the canvas in:
+        vbox = gtk.VBox(False, 0)
+        self.win.add(vbox)
+        vbox.show()
+
+        menu_bar = gtk.MenuBar()
+        vbox.pack_start(menu_bar, False, False, 2)
+        menu_bar.show()
+
+        menu_bar.append(root_menu)
+
+        sw = gtk.ScrolledWindow()
+        sw.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
+        sw.show()
+        canvas = gtk.DrawingArea()
+        width = gtk.gdk.screen_width()
+        height = gtk.gdk.screen_height()
+        canvas.set_size_request(width, height) 
+        sw.add_with_viewport(canvas)
+        canvas.show()
+        vbox.pack_end(sw, True, True)
+
+        self.win.show_all()
+
+        if os.path.exists('/usr/share/abacus/images/'):
+            self.abacus = Abacus(canvas, '/usr/share/abacus/images/')
+        elif os.path.exists('/usr/local/share/abacus/images/'):
+            self.abacus = Abacus(canvas, '/usr/local/share/abacus/images/')
+        else:
+            self.abacus = Abacus(canvas, os.path.abspath('.')+'/images/')
+        self.abacus.win = self.win
+
+        """
+
+        canvas = gtk.DrawingArea()
+        vbox.pack_end(canvas, True, True)
+        canvas.show()
+
+        menu_bar.append(root_menu)
+        self.win.show_all()
+
+        # Join the activity
+        self.abacus = Abacus(canvas, os.path.join(os.path.abspath('.'),
+                                                  'images/'))
+        """
+
+        self.abacus.activity = self
+
+    def set_title(self, title):
+        self.win.set_title(title)
+
+    def _c_cb(self, widget):
+        self.abacus.chinese.show()
+        self.abacus.japanese.hide()
+        self.abacus.russian.hide()
+        self.abacus.mode = self.abacus.chinese
+        return True
+
+    def _j_cb(self, widget):
+        self.abacus.chinese.hide()
+        self.abacus.japanese.show()
+        self.abacus.russian.hide()
+        self.abacus.mode = self.abacus.japanese
+        return True
+
+    def _r_cb(self, widget):
+        self.abacus.chinese.hide()
+        self.abacus.japanese.hide()
+        self.abacus.russian.show()
+        self.abacus.mode = self.abacus.russian
+        return True
+
+    def destroy(self, event, data=None):
+        """ Callback for destroy event. """
+        gtk.main_quit()
+
+def main():
+    gtk.main()
+    return 0
+
+if __name__ == "__main__":
+    AbacusMain()
+    main()
diff --git a/abacus_window.py b/abacus_window.py
new file mode 100644
index 0000000..32aa053
--- /dev/null
+++ b/abacus_window.py
@@ -0,0 +1,507 @@
+# -*- coding: utf-8 -*-
+#Copyright (c) 2010, Walter Bender
+
+# 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 constants import *
+
+import pygtk
+pygtk.require('2.0')
+import gtk
+from gettext import gettext as _
+import math
+import os
+
+try:
+    from sugar.graphics import style
+    GRID_CELL_SIZE = style.GRID_CELL_SIZE
+except:
+    GRID_CELL_SIZE = 0
+
+from sprites import *
+
+def load_image(path, name, w, h):
+    """ create a pixbuf from a SVG stored in a file """
+    return gtk.gdk.pixbuf_new_from_file_at_size(
+        os.path.join(path+name+'.svg'), int(w), int(h))
+
+class Abacus():
+
+    def __init__(self, canvas, path, parent=None):
+        """ Abacus class """
+        self.path = path
+        self.activity = parent
+
+        if parent is None:        # Starting from command line
+            self.sugar = False
+            self.canvas = canvas
+        else:                     # Starting from Sugar
+            self.sugar = True
+            self.canvas = canvas
+            parent.show_all()
+
+        self.canvas.set_flags(gtk.CAN_FOCUS)
+        self.canvas.add_events(gtk.gdk.BUTTON_PRESS_MASK)
+        self.canvas.add_events(gtk.gdk.BUTTON_RELEASE_MASK)
+        self.canvas.add_events(gtk.gdk.POINTER_MOTION_MASK)
+        self.canvas.connect("expose-event", self._expose_cb)
+        self.canvas.connect("button-press-event", self._button_press_cb)
+        self.canvas.connect("button-release-event", self._button_release_cb)
+        self.canvas.connect("motion-notify-event", self._mouse_move_cb)
+        self.width = gtk.gdk.screen_width()
+        self.height = gtk.gdk.screen_height()-GRID_CELL_SIZE
+        self.sprites = Sprites(self.canvas)
+        self.scale = gtk.gdk.screen_height()/900.0
+        self.dragpos = 0
+        self.press = None
+
+        self.chinese = Suanpan(self)
+        self.japanese = Soroban(self)
+        self.russian = Schety(self)
+
+        self.chinese.show()
+        self.japanese.hide()
+        self.russian.hide()
+        self.mode = self.chinese
+
+    def _button_press_cb(self, win, event):
+        win.grab_focus()
+        x, y = map(int, event.get_coords())
+        self.dragpos = y
+        self.press = self.sprites.find_sprite((x,y))
+        if self.press is not None and self.press.type != 'bead':
+            self.press = None
+        return True
+
+    def _mouse_move_cb(self, win, event):
+        if self.press is None:
+            self.dragpos = 0
+            return True
+        win.grab_focus()
+        x, y = map(int, event.get_coords())
+        dy = y-self.dragpos
+        self.mode.move_bead(self.press, dy)
+
+    def _button_release_cb(self, win, event):
+        if self.press == None:
+            return True
+        self.press = None
+        self.mode.label(self.mode.value())
+        return True
+
+    def _expose_cb(self, win, event):
+        self.sprites.redraw_sprites()
+        return True
+
+    def _destroy_cb(self, win, event):
+        gtk.main_quit()
+
+
+class Suanpan():
+
+    def __init__(self, abacus):
+        """ create a Chinese abacus: 15 by (5,2) """
+        self.abacus = abacus
+        self.num_rods = 15
+        self.bot_beads = 5
+        self.top_beads = 2
+        # 5 beads + 2 spaces, divider, 2 bead + 2 spaces
+        h = (self.bot_beads+2+1+self.top_beads+2)*BHEIGHT*self.abacus.scale
+        w = (self.num_rods+1)*(BWIDTH+BOFFSET)*self.abacus.scale
+        dy = 4*BHEIGHT*self.abacus.scale
+        x = (self.abacus.width-w)/2
+        y = (self.abacus.height-h)/2
+
+        # Draw the rods...
+        self.rods = []
+        o =  (BWIDTH+BOFFSET-5)*self.abacus.scale/2
+        dx = (BWIDTH+BOFFSET)*self.abacus.scale
+        for i in range(self.num_rods):
+            self.rods.append(Sprite(self.abacus.sprites, x+i*dx+o, y,
+                                    load_image(self.abacus.path, "chinese_rod",
+                                               10*self.abacus.scale, h)))
+
+        for i in self.rods:
+             i.type = 'rod'
+
+        # and then the beads.
+        self.beads = []
+        o =  (BWIDTH-BOFFSET)/2*self.abacus.scale/2
+        for i in range(self.num_rods):
+            for b in range(self.top_beads):
+                self.beads.append(Sprite(self.abacus.sprites, x+i*dx+o,
+                                         y+b*BHEIGHT*self.abacus.scale,
+                                         load_image(self.abacus.path, "white",
+                                                    BWIDTH*self.abacus.scale,
+                                                    BHEIGHT*self.abacus.scale)))
+            for b in range(self.bot_beads):
+                self.beads.append(Sprite(self.abacus.sprites, x+i*dx+o,
+                                         y+(7+b)*BHEIGHT*self.abacus.scale,
+                                         load_image(self.abacus.path, "white",
+                                                    BWIDTH*self.abacus.scale,
+                                                    BHEIGHT*self.abacus.scale)))
+
+        for i in self.beads:
+             i.type = 'bead'
+             i.state = 0
+
+        # Draw the dividing bar on top 
+        self.bar = Sprite(self.abacus.sprites, x, y+dy,
+                          load_image(self.abacus.path, "divider_bar",
+                                     w, BHEIGHT*self.abacus.scale))
+
+        self.bar.type = 'frame'
+        self.bar.set_label_color('white')
+
+    def value(self):
+        """ Return a string representing the value of each rod """
+        string = ''
+        v = []
+        for r in range(self.num_rods+1): # +1 for overflow
+            v.append(0)
+
+        # Tally the values on each rod.
+        for i, b in enumerate(self.beads):
+            r = i/(self.top_beads+self.bot_beads)
+            j = i%(self.top_beads+self.bot_beads)
+            if b.state == 1:
+                if j < self.top_beads:
+                    v[r+1] += 5
+                else:
+                    v[r+1] += 1
+
+        # Carry to the left if a rod has a value > 9.
+        for j in range(self.num_rods):
+            if v[len(v)-j-1] > 9:
+                v[len(v)-j-1] -= 10
+                v[len(v)-j-2] += 1
+
+        # Convert values to a string.
+        for j in v:
+            if string != '' or j > 0:
+                string += str(j)
+        return(string)
+
+    def hide(self):
+        for i in self.rods:
+            i.hide()
+        for i in self.beads:
+            i.hide()
+        self.bar.hide()
+
+    def show(self):
+        for i in self.rods:
+            i.set_layer(100)
+        for i in self.beads:
+            i.set_layer(101)
+        self.bar.set_layer(102)
+
+    def label(self, string):
+        """ Label the crossbar with the string. (USed with self.value) """
+        self.bar.set_label(string)
+
+    def move_bead(self, bead, dy):
+         """ Move a bead (or beads) up or down a rod. """
+         i = self.beads.index(bead)
+         b = i%(self.top_beads+self.bot_beads)
+
+         if b < self.top_beads:
+             if dy > 0 and bead.state == 0:
+                 bead.move_relative((0, 2*BHEIGHT*self.abacus.scale))
+                 bead.state = 1
+                 # make sure beads below this bead are also moved
+                 if b == 0 and self.beads[i+1].state == 0:
+                     self.beads[i+1].move_relative((0,
+                                                   2*BHEIGHT*self.abacus.scale))
+                     self.beads[i+1].state = 1
+             elif dy < 0 and bead.state == 1:
+                 bead.move_relative((0, -2*BHEIGHT*self.abacus.scale))
+                 # make sure beads above this bead are also moved
+                 if b == 1 and self.beads[i-1].state == 1:
+                     self.beads[i-1].move_relative((0,
+                                                  -2*BHEIGHT*self.abacus.scale))
+                     self.beads[i-1].state = 0
+                 bead.state = 0
+         else:
+             if dy < 0 and bead.state == 0:
+                 bead.move_relative((0, -2*BHEIGHT*self.abacus.scale))
+                 bead.state = 1
+                 # make sure beads above this bead are also moved
+                 for ii in range(b-self.top_beads+1):
+                     if self.beads[i-ii].state == 0:
+                         self.beads[i-ii].move_relative((0,
+                                                  -2*BHEIGHT*self.abacus.scale))
+                         self.beads[i-ii].state = 1
+             elif dy > 0 and bead.state == 1:
+                 bead.move_relative((0, 2*BHEIGHT*self.abacus.scale))
+                 bead.state = 0
+                 # make sure beads below this bead are also moved
+                 for ii in range(self.top_beads+self.bot_beads-b):
+                     if self.beads[i+ii].state == 1:
+                         self.beads[i+ii].move_relative((0,
+                                                   2*BHEIGHT*self.abacus.scale))
+                         self.beads[i+ii].state = 0
+         
+
+class Soroban():
+
+    def __init__(self, abacus):
+        """ create a Japanese abacus: 15 by (4,1) """
+        self.abacus = abacus
+        self.num_rods = 15
+        self.bot_beads = 4
+        self.top_beads = 1
+        # 4 beads + 2 spaces, divider, 1 bead + 2 spaces
+        h = (self.bot_beads+2+1+self.top_beads+2)*BHEIGHT*self.abacus.scale
+        w = (self.num_rods+1)*(BWIDTH+BOFFSET)*self.abacus.scale
+        dy = 3*BHEIGHT*self.abacus.scale
+        x = (self.abacus.width-w)/2
+        y = (self.abacus.height-h)/2
+
+        # Draw the rods...
+        self.rods = []
+        o =  (BWIDTH+BOFFSET-5)*self.abacus.scale/2
+        dx = (BWIDTH+BOFFSET)*self.abacus.scale
+        for i in range(self.num_rods):
+            self.rods.append(Sprite(self.abacus.sprites, x+i*dx+o, y,
+                                    load_image(self.abacus.path, "japanese_rod",
+                                               10, h)))
+
+        for i in self.rods:
+             i.type = 'rod'
+
+        # and then the beads.
+        self.beads = []
+        o =  (BWIDTH-BOFFSET)/2*self.abacus.scale/2
+        for i in range(self.num_rods):
+            for b in range(self.top_beads):
+                self.beads.append(Sprite(self.abacus.sprites, x+i*dx+o,
+                                         y+b*BHEIGHT*self.abacus.scale,
+                                         load_image(self.abacus.path, "white",
+                                                    BWIDTH*self.abacus.scale,
+                                                    BHEIGHT*self.abacus.scale)))
+            for b in range(self.bot_beads):
+                self.beads.append(Sprite(self.abacus.sprites, x+i*dx+o,
+                                         y+(6+b)*BHEIGHT*self.abacus.scale,
+                                         load_image(self.abacus.path, "white",
+                                                    BWIDTH*self.abacus.scale,
+                                                    BHEIGHT*self.abacus.scale)))
+
+        for i in self.beads:
+             i.type = 'bead'
+             i.state = 0
+
+        # Draw the dividing bar on top 
+        self.bar = Sprite(self.abacus.sprites, x, y+dy,
+                          load_image(self.abacus.path, "divider_bar",
+                                     w, BHEIGHT*self.abacus.scale))
+
+        self.bar.type = 'frame'
+        self.bar.set_label_color('white')
+
+    def hide(self):
+        for i in self.rods:
+            i.hide()
+        for i in self.beads:
+            i.hide()
+        self.bar.hide()
+
+    def show(self):
+        for i in self.rods:
+            i.set_layer(100)
+        for i in self.beads:
+            i.set_layer(101)
+        self.bar.set_layer(102)
+
+    def value(self):
+        """ Return a string with the value of each rod. """
+        string = ''
+        v = 0
+        for i, b in enumerate(self.beads):
+            if b.state == 1:
+                if i%(self.top_beads+self.bot_beads) < self.top_beads:
+                    v += 5
+                else:
+                    v += 1
+            if i%(self.top_beads+self.bot_beads) == \
+               self.top_beads+self.bot_beads-1:
+                if string != '' or v > 0:
+                    string += str(v)
+                v = 0
+        return(string)
+
+    def label(self, string):
+        """ Label the crossbar with the string. (USed with self.value) """
+        self.bar.set_label(string)
+
+    def move_bead(self, bead, dy):
+         """ Move a bead (or beads) up or down a rod. """
+         i = self.beads.index(bead)
+         b = i%(self.top_beads+self.bot_beads)
+
+         if b < self.top_beads:
+             if dy > 0 and bead.state == 0:
+                 bead.move_relative((0, 2*BHEIGHT*self.abacus.scale))
+                 bead.state = 1
+             elif dy < 0 and bead.state == 1:
+                 bead.move_relative((0, -2*BHEIGHT*self.abacus.scale))
+                 bead.state = 0
+         else:
+             if dy < 0 and bead.state == 0:
+                 bead.move_relative((0, -2*BHEIGHT*self.abacus.scale))
+                 bead.state = 1
+                 # make sure beads above this bead are also moved
+                 for ii in range(b-self.top_beads+1):
+                     if self.beads[i-ii].state == 0:
+                         self.beads[i-ii].move_relative((0,
+                                                  -2*BHEIGHT*self.abacus.scale))
+                         self.beads[i-ii].state = 1
+             elif dy > 0 and bead.state == 1:
+                 bead.move_relative((0, 2*BHEIGHT*self.abacus.scale))
+                 bead.state = 0
+                 # make sure beads below this bead are also moved
+                 for ii in range(self.top_beads+self.bot_beads-b):
+                     if self.beads[i+ii].state == 1:
+                         self.beads[i+ii].move_relative((0,
+                                                   2*BHEIGHT*self.abacus.scale))
+                         self.beads[i+ii].state = 0
+
+
+class Schety():
+
+    def __init__(self, abacus):
+        """ create a Russian abacus: 15 by 10 """
+        self.abacus = abacus
+        self.num_rods = 15
+        self.bot_beads = 10
+        # 10 beads + 2 spaces
+        h = (self.bot_beads+2)*BHEIGHT*self.abacus.scale
+        w = (self.num_rods+1)*(BWIDTH+BOFFSET)*self.abacus.scale
+        x = (self.abacus.width-w)/2
+        y = (self.abacus.height-h)/2
+
+        # Draw the rods...
+        self.rods = []
+        o =  (BWIDTH+BOFFSET-5)*self.abacus.scale/2
+        dx = (BWIDTH+BOFFSET)*self.abacus.scale
+        for i in range(self.num_rods):
+            self.rods.append(Sprite(self.abacus.sprites, x+i*dx+o, y,
+                                    load_image(self.abacus.path, "russian_rod",
+                                               10, h)))
+
+        for i in self.rods:
+             i.type = 'rod'
+
+        # and then the beads.
+        self.beads = []
+        o =  (BWIDTH-BOFFSET)/2*self.abacus.scale/2
+        for i in range(self.num_rods):
+            if i == 10:
+                for b in range(4):
+                    if b in [1,2]:
+                        color = 'black'
+                    else:
+                        color = 'white'
+                    self.beads.append(Sprite(self.abacus.sprites, x+i*dx+o,
+                                         y+(8+b)*BHEIGHT*self.abacus.scale,
+                                         load_image(self.abacus.path, color,
+                                                    BWIDTH*self.abacus.scale,
+                                                    BHEIGHT*self.abacus.scale)))
+            else:
+                for b in range(self.bot_beads):
+                    if b in [4,5]:
+                        color = 'black'
+                    else:
+                        color = 'white'
+                    self.beads.append(Sprite(self.abacus.sprites, x+i*dx+o,
+                                         y+(2+b)*BHEIGHT*self.abacus.scale,
+                                         load_image(self.abacus.path, color,
+                                                    BWIDTH*self.abacus.scale,
+                                                    BHEIGHT*self.abacus.scale)))
+
+        for i in self.beads:
+             i.type = 'bead'
+             i.state = 0
+
+        # Draw a bar for the label on top 
+        self.bar = Sprite(self.abacus.sprites, x, y-BHEIGHT*self.abacus.scale,
+                          load_image(self.abacus.path, "divider_bar",
+                                     w, BHEIGHT*self.abacus.scale))
+
+        self.bar.type = 'frame'
+        self.bar.set_label_color('white')
+
+    def hide(self):
+        for i in self.rods:
+            i.hide()
+        for i in self.beads:
+            i.hide()
+        self.bar.hide()
+
+    def show(self):
+        for i in self.rods:
+            i.set_layer(100)
+        for i in self.beads:
+            i.set_layer(101)
+        self.bar.set_layer(102)
+
+    def value(self):
+        # TODO: cascade and account for short rod
+        """ Return a string with the value of each rod. """
+        string = ''
+        v = 0
+        for i, b in enumerate(self.beads):
+            if b.state == 1:
+                v += 1
+            if i%self.bot_beads == self.bot_beads-1:
+                if string != '' or v > 0:
+                    string += str(v)
+                v = 0
+        return(string)
+
+    def label(self, string):
+        """ Label the crossbar with the string. (USed with self.value) """
+        self.bar.set_label(string)
+
+    def move_bead(self, bead, dy):
+         # TODO: take into account short rod in rod calculations
+         i = self.beads.index(bead)
+         r = i/self.bot_beads
+         if r < 10:
+             o = 2
+             b = i%self.bot_beads
+             n = self.bot_beads
+         elif r == 10:
+             o = 8
+             b = i%self.bot_beads
+             n = 4
+         else:
+             s = 2
+             b = (i+6)%self.bot_beads
+             n = self.bot_beads
+         if dy < 0 and bead.state == 0:
+             bead.move_relative((0, -o*BHEIGHT*self.abacus.scale))
+             bead.state = 1
+             # make sure beads above this bead are also moved
+             for ii in range(b+1):
+                 if self.beads[i-ii].state == 0:
+                     self.beads[i-ii].move_relative((0,
+                                                  -o*BHEIGHT*self.abacus.scale))
+                     self.beads[i-ii].state = 1
+         elif dy > 0 and bead.state == 1:
+             bead.move_relative((0, o*BHEIGHT*self.abacus.scale))
+             bead.state = 0
+             # make sure beads below this bead are also moved
+             for ii in range(n-b):
+                 if self.beads[i+ii].state == 1:
+                     self.beads[i+ii].move_relative((0,
+                                                   o*BHEIGHT*self.abacus.scale))
+                     self.beads[i+ii].state = 0
diff --git a/activity/activity-abacus.svg b/activity/activity-abacus.svg
new file mode 100644
index 0000000..8e4e512
--- /dev/null
+++ b/activity/activity-abacus.svg
@@ -0,0 +1,187 @@
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diff --git a/activity/activity.info b/activity/activity.info
new file mode 100644
index 0000000..335adb9
--- /dev/null
+++ b/activity/activity.info
@@ -0,0 +1,8 @@
+[Activity]
+name = Abacus
+activity_version = 1
+license = GPLv3
+bundle_id = org.sugarlabs.AbacusActivity
+exec = sugar-activity AbacusActivity.AbacusActivity
+icon = activity-abacus
+show_launcher = yes
diff --git a/constants.py b/constants.py
new file mode 100644
index 0000000..ca7f6c2
--- /dev/null
+++ b/constants.py
@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+#Copyright (c) 2009, Walter Bender
+
+#Permission is hereby granted, free of charge, to any person obtaining a copy
+#of this software and associated documentation files (the "Software"), to deal
+#in the Software without restriction, including without limitation the rights
+#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+#copies of the Software, and to permit persons to whom the Software is
+#furnished to do so, subject to the following conditions:
+
+#The above copyright notice and this permission notice shall be included in
+#all copies or substantial portions of the Software.
+
+#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+#THE SOFTWARE.
+
+BWIDTH = 40
+BHEIGHT = 30
+BOFFSET = 10
+NRODS = 15
+
diff --git a/icons/Coff.svg b/icons/Coff.svg
new file mode 100644
index 0000000..aa6c56a
--- /dev/null
+++ b/icons/Coff.svg
@@ -0,0 +1,184 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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diff --git a/icons/Con.svg b/icons/Con.svg
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+         d="m 10.864456,21.54732 a 4,2.75 0 1 1 -7.9999992,0 4,2.75 0 1 1 7.9999992,0 z"
+         id="path3633-2-7-3-6"
+         style="fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none" />
+      <path
+         d="m 10.864456,27.049879 a 4,2.75 0 1 1 -7.9999992,0 4,2.75 0 1 1 7.9999992,0 z"
+         id="path3633-7-6-6-0-8"
+         style="fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none" />
+      <path
+         d="m 10.864456,32.552439 a 4,2.75 0 1 1 -7.9999992,0 4,2.75 0 1 1 7.9999992,0 z"
+         id="path3633-5-6-5-7-9"
+         style="fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none" />
+      <path
+         d="m 10.864456,38.054999 a 4,2.75 0 1 1 -7.9999992,0 4,2.75 0 1 1 7.9999992,0 z"
+         id="path3633-3-49-6-8-2"
+         style="fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none" />
+      <path
+         d="m 10.864456,16.04476 a 4,2.75 0 1 1 -7.9999992,0 4,2.75 0 1 1 7.9999992,0 z"
+         id="path3633-4-5-9-6-6"
+         style="fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none" />
+    </g>
+  </g>
+</svg>
diff --git a/images/black.svg b/images/black.svg
new file mode 100644
index 0000000..1101eb4
--- /dev/null
+++ b/images/black.svg
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   width="40"
+   height="30"
+   id="svg2">
+  <defs
+     id="defs4" />
+  <g
+     transform="translate(-3.329523e-6,-1022.3622)"
+     id="layer1">
+    <path
+       d="m 379.99999,425.21933 a 98.571434,49.999996 0 1 1 -197.14287,0 98.571434,49.999996 0 1 1 197.14287,0 z"
+       transform="matrix(0.18768115,0,0,0.27000002,-32.818832,922.55297)"
+       id="path2816"
+       style="fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:#ffffff;stroke-width:13.32689667;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" />
+  </g>
+</svg>
diff --git a/images/chinese_rod.svg b/images/chinese_rod.svg
new file mode 100644
index 0000000..a8cb73c
--- /dev/null
+++ b/images/chinese_rod.svg
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   width="10"
+   height="360"
+   id="svg2">
+  <rect
+       width="10"
+       height="360"
+       x="0"
+       y="0"
+       style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:3.0;stroke-opacity:1" />
+</svg>
diff --git a/images/divider_bar.svg b/images/divider_bar.svg
new file mode 100644
index 0000000..0c89eec
--- /dev/null
+++ b/images/divider_bar.svg
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   width="750"
+   height="30"
+   id="svg2">
+  <rect
+       width="750"
+       height="30"
+       x="0"
+       y="0"
+       style="fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:#000000;stroke-width:3;stroke-opacity:1" />
+</svg>
diff --git a/images/japanese_rod.svg b/images/japanese_rod.svg
new file mode 100644
index 0000000..bc9a5ca
--- /dev/null
+++ b/images/japanese_rod.svg
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   width="10"
+   height="300"
+   id="svg2">
+  <rect
+       width="10"
+       height="300"
+       x="0"
+       y="0"
+       style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:3.0;stroke-opacity:1" />
+</svg>
diff --git a/images/russian_rod.svg b/images/russian_rod.svg
new file mode 100644
index 0000000..a8cb73c
--- /dev/null
+++ b/images/russian_rod.svg
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   width="10"
+   height="360"
+   id="svg2">
+  <rect
+       width="10"
+       height="360"
+       x="0"
+       y="0"
+       style="fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:3.0;stroke-opacity:1" />
+</svg>
diff --git a/images/white.svg b/images/white.svg
new file mode 100644
index 0000000..9b66d68
--- /dev/null
+++ b/images/white.svg
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   width="40"
+   height="30"
+   id="svg2">
+  <defs
+     id="defs4" />
+  <g
+     transform="translate(-3.329523e-6,-1022.3622)"
+     id="layer1">
+    <path
+       d="m 379.99999,425.21933 a 98.571434,49.999996 0 1 1 -197.14287,0 98.571434,49.999996 0 1 1 197.14287,0 z"
+       transform="matrix(0.18768115,0,0,0.27000002,-32.818832,922.55297)"
+       id="path2816"
+       style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:#000000;stroke-width:13.32689667;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none" />
+  </g>
+</svg>
diff --git a/setup.py b/setup.py
new file mode 100755
index 0000000..bd1e319
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,5 @@
+#!/usr/bin/env python
+from sugar.activity import bundlebuilder
+if __name__ == "__main__":
+    bundlebuilder.start()
+
diff --git a/sprites.py b/sprites.py
new file mode 100644
index 0000000..045ab98
--- /dev/null
+++ b/sprites.py
@@ -0,0 +1,367 @@
+# -*- coding: utf-8 -*-
+
+#Copyright (c) 2007-8, Playful Invention Company.
+#Copyright (c) 2008-10 Walter Bender
+
+#Permission is hereby granted, free of charge, to any person obtaining a copy
+#of this software and associated documentation files (the "Software"), to deal
+#in the Software without restriction, including without limitation the rights
+#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+#copies of the Software, and to permit persons to whom the Software is
+#furnished to do so, subject to the following conditions:
+
+#The above copyright notice and this permission notice shall be included in
+#all copies or substantial portions of the Software.
+
+#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+#THE SOFTWARE.
+
+"""
+
+sprites.py is a simple sprites library for managing graphics objects,
+'sprites', on a canvas. It manages multiple sprites with methods such
+as move, hide, set_layer, etc.
+
+There are two classes:
+
+class Sprites maintains a collection of sprites.
+class Sprite manages individual sprites within the collection.
+
+Example usage:
+        # Import the classes into your program.
+        from sprites import Sprites, Sprite
+
+        # Create a new sprite collection for a gtk Drawing Area.
+        my_drawing_area = gtk.DrawingArea()
+        self.sprite_list = Sprites(my_drawing_area)
+
+        # Create a "pixbuf" (in this example, from SVG).
+        my_pixbuf = svg_str_to_pixbuf("<svg>...some svg code...</svg>")
+
+        # Create a sprite at position x1, y1.
+        my_sprite = sprites.Sprite(self.sprite_list, x1, y1, my_pixbuf)
+
+        # Move the sprite to a new position.
+        my_sprite.move((x1+dx, y1+dy))
+
+        # Create another "pixbuf".
+        your_pixbuf = svg_str_to_pixbuf("<svg>...some svg code...</svg>")
+
+        # Create a sprite at position x2, y2.
+        your_sprite = sprites.Sprite(self.sprite_list, x2, y2, my_pixbuf)
+
+        # Assign the sprites to layers.
+        # In this example, your_sprite will be on top of my_sprite.
+        my_sprite.set_layer(100)
+        your_sprite.set_layer(200)
+
+        # Now put my_sprite on top of your_sprite.
+        my_sprite.set_layer(300)
+
+# method for converting SVG to a gtk pixbuf
+def svg_str_to_pixbuf(svg_string):
+    pl = gtk.gdk.PixbufLoader('svg')
+    pl.write(svg_string)
+    pl.close()
+    pixbuf = pl.get_pixbuf()
+    return pixbuf
+"""
+
+import pygtk
+pygtk.require('2.0')
+import gtk
+import gobject
+import pango
+
+#
+# A class for the list of sprites and everything they share in common
+#
+
+class Sprites:
+    def __init__(self, canvas, area=None, gc=None):
+        self.canvas = canvas
+        if area == None:
+            self.area = self.canvas.window
+            self.gc = self.area.new_gc()
+        else:
+            self.area = area
+            self.gc = gc
+        self.cm = self.gc.get_colormap()
+        self.list = []
+
+    def get_sprite(self, i):
+        if i < 0 or i > len(self.list)-1:
+            return(None)
+        else:
+            return(self.list[i])
+
+    def length_of_list(self):
+        return(len(self.list))
+
+    def append_to_list(self, spr):
+        self.list.append(spr)
+
+    def insert_in_list(self, spr, i):
+        if i < 0:
+            self.list.insert(0, spr)
+        elif i > len(self.list)-1:
+            self.list.append(spr)
+        else:
+            self.list.insert(i, spr)
+
+    def remove_from_list(self, spr):
+        if spr in self.list:
+            self.list.remove(spr)
+
+    def find_sprite(self, pos):
+        list = self.list[:]
+        list.reverse()
+        for spr in list:
+            if spr.hit(pos): return spr
+        return None
+
+    def redraw_sprites(self):
+        for spr in self.list:
+            spr.draw()
+
+#
+# A class for the individual sprites
+#
+class Sprite:
+    def __init__(self, sprites, x, y, image):
+        self._sprites = sprites
+        self._x = int(x)
+        self._y = int(y)
+        self._scale = [12]
+        self._rescale = [True]
+        self._horiz_align = ["center"]
+        self._vert_align = ["middle"]
+        self._fd = None
+        self._bold = False
+        self._italic = False
+        self._color = None
+        self._width = 0
+        self._height = 0
+        self._margins = [0,0,0,0]
+        self.layer = 100
+        self.labels = []
+        self.images = []
+        self._dx = [] # image offsets
+        self._dy = []
+        self.set_image(image)
+        self._sprites.append_to_list(self)
+
+    def set_image(self, image, i=0, dx=0, dy=0):
+        while len(self.images) < i+1:
+           self.images.append(None)
+           self._dx.append(0)
+           self._dy.append(0)
+        self.images[i] = image
+        self._dx[i] = dx
+        self._dy[i] = dy
+        if isinstance(image, gtk.gdk.Pixbuf):
+            _w = image.get_width()
+            _h = image.get_height()
+        else:
+            _w, _h = image.get_size()
+        if i == 0: # Always reset width and height when base image changes.
+            self._width = _w + dx
+            self._height = _h + dy
+        else:
+            if _w + dx > self._width:
+                self._width = _w + dx
+            if _h + dy > self._height:
+                self._height = _h + dy
+
+    def move(self, pos):
+        self.inval()
+        self._x,self._y = int(pos[0]),int(pos[1])
+        self.inval()
+
+    def move_relative(self, pos):
+        self.inval()
+        self._x += int(pos[0])
+        self._y += int(pos[1])
+        self.inval()
+
+    def get_xy(self):
+        return (self._x, self._y)
+
+    def get_dimensions(self):
+        return (self._width, self._height)
+
+    def get_layer(self):
+        return self.layer
+
+    def set_shape(self, image, i=0):
+        self.inval()
+        self.set_image(image, i)
+        self.inval()
+
+    def set_layer(self, layer):
+        self._sprites.remove_from_list(self)
+        self.layer = layer
+        for i in range(self._sprites.length_of_list()):
+            if layer < self._sprites.get_sprite(i).layer:
+                self._sprites.insert_in_list(self, i)
+                self.inval()
+                return
+        self._sprites.append_to_list(self)
+        self.inval()
+
+    def set_label(self, new_label, i=0):
+        self._extend_labels_array(i)
+        if type(new_label) is str or type(new_label) is unicode:
+            # pango doesn't like nulls
+            self.labels[i] = new_label.replace("\0"," ")
+        else:
+            self.labels[i] = str(new_label)
+        self.inval()
+
+    def set_margins(self, l=0, t=0, r=0, b=0):
+        self._margins = [l,t,r,b]
+
+    def _extend_labels_array(self, i):
+        if self._fd is None:
+           self.set_font('Sans')
+        if self._color is None:
+           self._color = self._sprites.cm.alloc_color('black')
+        while len(self.labels) < i+1:
+           self.labels.append(" ")
+           self._scale.append(self._scale[0])
+           self._rescale.append(self._rescale[0])
+           self._horiz_align.append(self._horiz_align[0])
+           self._vert_align.append(self._vert_align[0])
+
+    def set_font(self, font):
+        self._fd = pango.FontDescription(font)
+
+    def set_label_color(self, rgb):
+        self._color = self._sprites.cm.alloc_color(rgb)
+
+    def set_label_attributes(self, scale, rescale=True, horiz_align="center",
+                             vert_align="middle", i=0):
+        self._extend_labels_array(i)
+        self._scale[i] = scale
+        self._rescale[i] = rescale
+        self._horiz_align[i] = horiz_align
+        self._vert_align[i] = vert_align
+
+    def hide(self):
+        self.inval()
+        self._sprites.remove_from_list(self)
+
+    def inval(self):
+        self._sprites.area.invalidate_rect(
+            gtk.gdk.Rectangle(self._x,self._y,self._width,self._height), False)
+
+    def draw(self):
+        for i,img in enumerate(self.images):
+            if isinstance(img, gtk.gdk.Pixbuf):
+                self._sprites.area.draw_pixbuf(
+                    self._sprites.gc, img, 0, 0, self._x+self._dx[i],
+                                                 self._y+self._dy[i])
+            elif img is not None:
+                self._sprites.area.draw_drawable(
+                    self._sprites.gc, img, 0, 0, self._x+self._dx[i],
+                                                 self._y+self._dy[i], -1, -1)
+        if len(self.labels) > 0:
+            self.draw_label()
+
+    def hit(self, pos):
+        x, y = pos
+        if x < self._x:
+            return False
+        if x > self._x+self._width:
+            return False
+        if y < self._y:
+            return False
+        if y > self._y+self._height:
+            return False
+        return True
+
+    def draw_label(self):
+        my_width = self._width-self._margins[0]-self._margins[2]
+        if my_width < 0:
+            my_width = 0
+        my_height = self._height-self._margins[1]-self._margins[3]
+        for i in range(len(self.labels)):
+            pl = self._sprites.canvas.create_pango_layout(str(self.labels[i]))
+            self._fd.set_size(int(self._scale[i]*pango.SCALE))
+            pl.set_font_description(self._fd)
+            w = pl.get_size()[0]/pango.SCALE
+            if w > my_width:
+                if self._rescale[i] is True:
+                    self._fd.set_size(
+                                    int(self._scale[i]*pango.SCALE*my_width/w))
+                    pl.set_font_description(self._fd)
+                    w = pl.get_size()[0]/pango.SCALE
+                else:
+                    j = len(self.labels[i])-1
+                    while(w > my_width and j > 0):
+                        pl = self._sprites.canvas.create_pango_layout(
+                                 "…"+self.labels[i][len(self.labels[i])-j:])
+                        self._fd.set_size(int(self._scale[i]*pango.SCALE))
+                        pl.set_font_description(self._fd)
+                        w = pl.get_size()[0]/pango.SCALE        
+                        j -= 1
+            if self._horiz_align[i] == "center":
+                x = int(self._x+self._margins[0]+(my_width-w)/2)
+            elif self._horiz_align[i] == 'left':
+                x = int(self._x+self._margins[0])
+            else: # right
+                x = int(self._x+self._width-w-self._margins[2])
+            h = pl.get_size()[1]/pango.SCALE
+            if self._vert_align[i] == "middle":
+                y = int(self._y+self._margins[1]+(my_height-h)/2)
+            elif self._vert_align[i] == "top":
+                y = int(self._y+self._margins[1])
+            else: # bottom
+                y = int(self._y+self._height-h-self._margins[3])
+            self._sprites.gc.set_foreground(self._color)
+            self._sprites.area.draw_layout(self._sprites.gc, x, y, pl)
+
+    def label_width(self):
+        max = 0
+        for i in range(len(self.labels)):
+            pl = self._sprites.canvas.create_pango_layout(self.labels[i])
+            self._fd.set_size(int(self._scale[i]*pango.SCALE))
+            pl.set_font_description(self._fd)
+            w = pl.get_size()[0]/pango.SCALE
+            if w > max:
+                max = w
+        return max
+
+    def label_safe_width(self):
+        return self._width-self._margins[0]-self._margins[2]
+    
+    def label_safe_height(self):
+        return self._height-self._margins[1]-self._margins[3]
+    
+    def label_left_top(self):
+        return (self._margins[0], self._margins[1])
+
+    def get_pixel(self, pos, i=0):
+        x, y = pos
+        x = x-self._x
+        y = y-self._y
+        if y > self.images[i].get_height()-1:
+            return (-1,-1,-1,-1)
+        try:
+            array = self.images[i].get_pixels()
+            if array is not None:
+                offset = (y*self.images[i].get_width()+x)*4
+                r,g,b,a = ord(array[offset]), ord(array[offset+1]),\
+                          ord(array[offset+2]), ord(array[offset+3])
+                return (r,g,b,a)
+            else:
+                return (-1,-1,-1,-1)
+        except IndexError:
+            print "Index Error: %d %d" % (len(array), offset)
+            return (-1,-1,-1,-1)
+
author	Walter Bender <walter@sugarlabs.org>	2010-04-02 16:27:20 (GMT)
committer	Walter Bender <walter@sugarlabs.org>	2010-04-02 16:27:20 (GMT)
commit	8162f477074c485f417ffc7e5b2eb0f1022d3068 (patch)
tree	af0ee443b1537019e5743cf40aa70c93ca80b0ae