Rework the Icon implementation by splitting out

the icon rendering part. The plan is to share this code
with CanvasIcon once it has all the necessary features.

Also cleanup the API by just reusing gtk.Image icon_name
and file properties.

tests/graphics/iconwidget.py

@@ -0,0 +1,45 @@
+# 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.
+
+"""
+Test the sugar.graphics.icon.Icon widget.
+"""
+
+import gtk
+
+from sugar.graphics.icon import Icon
+from sugar.graphics.xocolor import XoColor
+
+import common
+
+test = common.Test()
+
+icon = Icon(icon_name='go-previous')
+icon.props.icon_size = gtk.ICON_SIZE_LARGE_TOOLBAR
+test.pack_start(icon)
+icon.show()
+
+icon = Icon(icon_name='computer-xo', 
+            icon_size=gtk.ICON_SIZE_LARGE_TOOLBAR,
+            xo_color=XoColor())
+test.pack_start(icon)
+icon.show()
+
+test.show()
+
+if __name__ == "__main__":
+    common.main(test)