Index: graphics.cc
===================================================================
RCS file: /cvs/octave/src/graphics.cc,v
retrieving revision 1.22
diff -c -r1.22 graphics.cc
*** graphics.cc	28 Jun 2007 15:25:44 -0000	1.22
--- graphics.cc	7 Jul 2007 17:08:58 -0000
***************
*** 171,176 ****
--- 171,226 ----
      error ("invalid color specification");
  }
  
+ color_property& color_property::operator = (const octave_value& val)
+ {
+   if (val.is_string ())
+     {
+       std::string s = val.string_value ();
+ 
+       if (! s.empty ())
+ 	{
+ 	  if (radio_val.validate (s))
+ 	    {
+ 	      current_val = s;
+ 	      current_type = radio_t;
+ 	    }
+           else
+ 	    {
+ 	      color_values col (s);
+ 	      if (! error_state)
+ 		{
+ 		  color_val = col;
+ 		  current_type = color_t;
+ 		}
+ 	      else
+ 		error ("invalid color specification");	  
+ 	    }	
+ 	}
+       else
+ 	error ("invalid color specification");	  
+     }
+   else if (val.is_real_matrix ())
+     {
+       Matrix m = val.matrix_value ();
+ 
+       if (m.numel () == 3)
+ 	{
+ 	  color_values col (m (0), m (1), m(2));
+ 	  if (! error_state)
+ 	    {
+ 	      color_val = col;
+ 	      current_type = color_t;
+ 	    }
+ 	}
+       else
+ 	error ("invalid color specification");
+     }
+   else 
+     error ("invalid color specification");
+ 
+   return *this;
+ }
+ 
  
  void
  property_list::set (const property_name& name, const octave_value& val)
***************
*** 1564,1570 ****
    else if (name.compare ("xudata"))
      xudata = val;
    else if (name.compare ("color"))
!     color = color_property (val);
    else if (name.compare ("linestyle"))
      linestyle = val;
    else if (name.compare ("linewidth"))
--- 1614,1620 ----
    else if (name.compare ("xudata"))
      xudata = val;
    else if (name.compare ("color"))
!     color = val;
    else if (name.compare ("linestyle"))
      linestyle = val;
    else if (name.compare ("linewidth"))
Index: graphics.h
===================================================================
RCS file: /cvs/octave/src/graphics.h,v
retrieving revision 1.6
diff -c -r1.6 graphics.h
*** graphics.h	28 Jun 2007 15:25:44 -0000	1.6
--- graphics.h	7 Jul 2007 17:08:58 -0000
***************
*** 261,266 ****
--- 261,268 ----
      return *this;
    }
  
+   color_property& operator = (const octave_value& newval);
+ 
    bool is_rgb (void) const { return (current_type == color_t); }
  
    bool is_radio (void) const { return (current_type == radio_t); }