--- a/src/ChangeLog	Thu Feb 14 06:33:29 2008 +0200
+++ b/src/ChangeLog	Wed Feb 13 17:06:22 2008 +0100
@@ -15,6 +15,19 @@
 
 2008-06-04  Michael Goffioul <michael.goffioul@gmail.com>
 
+	* graphics.h.in (base_properties::update_boundingbox): New method
+	to handle object resize.
+	(figure::properties::set_boundingbox): New method to set figure
+	position from backend.
+	(figure::properties::update_position): Remove method.
+	(figure::properties::position): Remove 'u' modifier and add 'S'
+	modifier.
+	(axes::properties::update_boundingbox): Overload to recompute
+	transformation when axes size changed.
+	* graphics.cc (base_properties::update_boundingbox): New method.
+	(figure::properties::set_boundingbox,
+	figure::properties::set_position): Likewise.
+
 	* genprops.awk: Add 'U' modifier to support extern updaters.
 	* graphics.h.in (base_graphics_backend::gripe_invalid): New method
 	to simplify error reporting.

--- a/src/graphics.cc	Thu Feb 14 06:33:29 2008 +0200
+++ b/src/graphics.cc	Wed Feb 13 17:06:22 2008 +0100
@@ -1301,6 +1301,20 @@
     return graphics_backend ();
 }
 
+void
+base_properties::update_boundingbox (void)
+{
+  Matrix kids = get_children ();
+
+  for (int i = 0; i < kids.numel (); i++)
+    {
+      graphics_object go = gh_manager::get_object (kids(i));
+
+      if (go.valid_object ())
+	go.get_properties ().update_boundingbox ();
+    }
+}
+
 // ---------------------------------------------------------------------
 
 class gnuplot_backend : public base_graphics_backend
@@ -1503,6 +1517,49 @@
   return pos;
 }
 
+void
+figure::properties::set_boundingbox (const Matrix& bb)
+{
+  graphics_backend b = get_backend ();
+  // FIXME: screen size should be obtained from root object
+  Matrix screen_size = b.get_screen_size ();
+  Matrix pos = bb;
+
+  pos(1) = screen_size(1) - pos(1) - pos(3);
+  pos(1)++;
+  pos(0)++;
+  pos = convert_position (pos, "pixels", get_units (), screen_size, b);
+
+  set_position (pos);
+}
+
+void
+figure::properties::set_position (const octave_value& v)
+{
+  if (! error_state)
+    {
+      Matrix old_bb, new_bb;
+
+      old_bb = get_boundingbox ();
+      position = v;
+      new_bb = get_boundingbox ();
+
+      if (old_bb != new_bb)
+	{
+	  // FIXME: maybe this should be converted into a more generic
+	  //        call like "update_gui (this)"
+	  get_backend ().set_figure_position (__myhandle__, new_bb);
+	  if (old_bb(2) != new_bb(2) || old_bb(3) != new_bb(3))
+	    {
+	      execute_resizefcn ();
+	      update_boundingbox ();
+	    }
+	}
+
+      mark_modified ();
+    }
+}
+
 octave_value
 figure::get_default (const caseless_str& name) const
 {

--- a/src/graphics.h.in	Thu Feb 14 06:33:29 2008 +0200
+++ b/src/graphics.h.in	Wed Feb 13 17:06:22 2008 +0100
@@ -1421,6 +1421,8 @@
   virtual Matrix get_boundingbox (bool /*internal*/ = false) const
     { return Matrix (1, 4, 0.0); }
 
+  virtual void update_boundingbox (void);
+
   void set_tag (const octave_value& val) { tag = val; }
 
   void set_parent (const octave_value& val);
@@ -2162,8 +2164,7 @@
 
     Matrix get_boundingbox (bool internal = false) const;
 
-    void update_position (void)
-      { backend.set_figure_position (__myhandle__, get_boundingbox ()); }
+    void set_boundingbox (const Matrix& bb);
 
     // See the genprops.awk script for an explanation of the
     // properties declarations.
@@ -2200,7 +2201,7 @@
       radio_property pointer , "crosshair|fullcrosshair|{arrow}|ibeam|watch|topl|topr|botl|botr|left|top|right|bottom|circle|cross|fleur|custom|hand"
       array_property pointershapecdata , Matrix (16, 16, 0)
       array_property pointershapehotspot , Matrix (1, 2, 0)
-      array_property position u , default_figure_position ()
+      array_property position S , default_figure_position ()
       radio_property renderer , "{painters}|zbuffer|opengl|none"
       radio_property renderermode , "{auto}|manual"
       bool_property resize , "on"
@@ -2377,6 +2378,15 @@
 
     Matrix get_boundingbox (bool internal = false) const;
 
+    void update_boundingbox (void)
+      {
+	if (units_is ("normalized"))
+	  {
+	    update_transform ();
+	    base_properties::update_boundingbox ();
+	  }
+      }
+
     void update_camera (void);
     void update_aspectratios (void);
     void update_transform (void)