new -n command line option to hide all views+meshes on startup; makes -noview obsolete

Common/CommandLine.cpp

@@ -88,9 +88,8 @@ void PrintUsage(const char *name)
   Msg::Direct("  -link int             Select link mode between views (0, 1, 2, 3, 4)");
   Msg::Direct("  -combine              Combine views having identical names into multi-time-step views");
   Msg::Direct("Display options:");    
+  Msg::Direct("  -n                    Hide all meshes and post-processing views on startup");
   Msg::Direct("  -nodb                 Disable double buffering");
-  Msg::Direct("  -noview               Hide all views on startup");
-  Msg::Direct("  -nomesh               Hide all meshes on startup");
   Msg::Direct("  -fontsize int         Specify the font size for the GUI");
   Msg::Direct("  -theme string         Specify FLTK GUI theme");
   Msg::Direct("  -display string       Specify display");
@@ -590,6 +589,16 @@ void GetOptions(int argc, char *argv[])
         opt_mesh_volumes_faces(0, GMSH_SET, 0.);
         i++;
       }
+      else if(!strcmp(argv[i] + 1, "n")) {
+        opt_view_visible(0, GMSH_SET, 0);
+        opt_mesh_points(0, GMSH_SET, 0.);
+        opt_mesh_lines(0, GMSH_SET, 0.);
+        opt_mesh_surfaces_edges(0, GMSH_SET, 0.);
+        opt_mesh_surfaces_faces(0, GMSH_SET, 0.);
+        opt_mesh_volumes_edges(0, GMSH_SET, 0.);
+        opt_mesh_volumes_faces(0, GMSH_SET, 0.);
+        i++;
+      }
       else if(!strcmp(argv[i] + 1, "link")) {
         i++;
         if(argv[i])

doc/texinfo/gmsh.texi

@@ -899,12 +899,10 @@ Combine views having identical names into multi-time-step views
 @noindent Display options:
 
 @ftable @code
+@item -n
+Hide all meshes and post-processing views on startup
 @item -nodb
 Disable double buffering
-@item -noview
-Hide all views on startup
-@item -nomesh
-Hide all meshes on startup
 @item -fontsize int
 Specify the font size for the GUI
 @item -theme string