First go at shared links (not functional)

sugar/graphics/bubble.py

@@ -0,0 +1,48 @@
+import gobject
+import hippo
+
+class Bubble(hippo.CanvasBox, hippo.CanvasItem):
+	__gtype_name__ = 'SugarBubble'
+
+	__gproperties__ = {
+		'color'    : (object, None, None,
+					  gobject.PARAM_READWRITE),
+	}
+
+	def __init__(self, **kwargs):
+		self._color = None
+		self._radius = 12
+
+		hippo.CanvasBox.__init__(self, **kwargs)
+
+	def do_set_property(self, pspec, value):
+		if pspec.name == 'color':
+			self._color = value
+			self.emit_paint_needed(0, 0, -1, -1)
+
+	def do_get_property(self, pspec):
+		if pspec.name == 'color':
+			return self._color
+
+	def _color_string_to_rgb(self, color_string):
+		col = gtk.gdk.color_parse(color_string)
+		return (col.red / 65535, col.green / 65535, col.blue / 65535)
+
+	def do_paint_below_children(self, cr, damaged_box):
+		cairo_move_to(self._radius, 0);
+		cr.arc(width - self._radius, self._radius,
+			   self._radius, math.pi * 1.5, math.pi * 2);
+		cr.arc(width - self._radius, height - self._radius,
+			   self._radius, 0, math.pi * 0.5);
+		cr.arc(self._radius, height - self._radius,
+			   self._radius, math.pi * 0.5, math.pi);
+		cr.arc(cr, self._radius, self._radius, self._radius,
+			   math.pi, math.pi * 1.5);
+
+		color = self._color.get_fill_color()
+		cr.set_source_rgb(cr, self._color_string_to_rgb(color));
+		cairo_fill_preserve(cr);
+
+		color = self._color.get_stroke_color()
+		cr.set_source_rgb(cr, self._color_string_to_rgb(color));
+		cairo_stroke(cr);