Initial snow flake layout implementation

tests/test-snowflake.py

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+#!/usr/bin/python
+import pygtk
+pygtk.require('2.0')
+import gobject
+
+from sugar.session.UITestSession import UITestSession
+
+session = UITestSession()
+session.start()
+
+import sys
+import random
+
+import gtk
+import goocanvas
+
+from sugar.canvas.SnowflakeLayout import SnowflakeLayout
+from sugar.canvas import IconColor
+from sugar.canvas.IconItem import IconItem
+from sugar.canvas.CanvasView import CanvasView
+from sugar.canvas.Grid import Grid
+
+def _create_snowflake(group, children):
+	color = IconColor.IconColor()
+	icon = IconItem(size=60, color=color,
+					icon_name='activity-groupchat')
+	group.add_child(icon)
+	layout.set_root(icon)
+
+	for i in range(0, children):
+		color = IconColor.IconColor()
+		icon = IconItem(size=60, color=color,
+						icon_name='stock-buddy')
+		group.add_child(icon)
+		layout.add_child(icon)
+
+window = gtk.Window()
+window.connect("destroy", lambda w: gtk.main_quit())
+window.show()
+
+canvas = CanvasView()
+canvas.show()
+window.add(canvas)
+
+canvas_model = goocanvas.CanvasModelSimple()
+root = canvas_model.get_root_item()
+
+item = goocanvas.Rect(x=0, y=0, width=1200, height=900,
+                      line_width=0.0, fill_color='#e2e2e2')
+root.add_child(item)
+
+layout = SnowflakeLayout()
+group = goocanvas.Group()
+snow_flake = _create_snowflake(group, 30)
+root.add_child(group)
+
+layout = SnowflakeLayout()
+group = goocanvas.Group()
+group.translate(500, 500)
+_create_snowflake(group, 8)
+root.add_child(group)
+
+
+canvas.set_model(canvas_model)
+
+gtk.main()