O2D: Several (unrelated) improvements:...

plugin/idl/layer.idl

 /*
  * Copyright 2010, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 41 matching lines @@
     The x coordinate of the top-left corner of this layer.
   %]
   [getter, setter] double x;
 
   %[
     The y coordinate of the top-left corner of this layer.
   %]
   [getter, setter] double y;
 
   %[
+    The z coordinate of the layer (used only to determine stacking order).
+  %]
+  [getter, setter] double z;
+
+  %[
     The width of this layer.
   %]
   [getter, setter] double width;
 
   %[
     The height of this layer.
   %]
   [getter, setter] double height;
 
   %[
     A scaling factor to apply to the pattern's x-axis.
   %]
   [getter, setter] double scale_x;
 
   %[
     A scaling factor to apply to the pattern's y-axis.
   %]
   [getter, setter] double scale_y;
 };  // Layer
 
 }  // namespace o2d
 
 }  // namespace o3d