allow renaming of variables in workspace viewer * main-window.h, main-window.cc (main_window::handle_rename_variable_request): New function. (main_window::construct_octave_qt_link): Connect _workspace_model::rename_variable to main_window::handle_rename_variable_request. (main_window::rename_variable_callback): New function. * octave-qt-link.h, octave-qt-link.cc (octave_qt_link::do_set_workspace, octave_qt_link::set_workspace_signal): New argument, top_level. Change all uses. * octave-link.h, octave-link.cc (octave_link::post_event): Provide two-argument version. (octave_link::set_workspace, octave_link::do_set_workspace): New argument, top_level. Change all uses. * workspace-model.h, workspace-model.cc (workspace_model::flags): Conditionally add Qt::ItemIsEditable to flags. (workspace_model::data): Also return value for column 0 if it is editable. (workspace_model::setData): Handle setting new values. (workspace_model::_top_level): New data member. (workspace_model::set_workspace): New argument, top_level. (workspace_model::rename_variable): New signal. * workspace-view.h, workspace-view.cc (variable_name_editor): New class. (workspace_view::var_name_editor): New data member. (workspace_view::workspace_view): Initialize it. Set var_name_editor as delegate for column 0. (workspace_view::~workspace_view): Delete var_name_editor. (workspace_view::item_double_clicked): Delete. * symtab.h (symbol_table::rename, symbol_table::do_rename, symbol_table::symbol_record::rename): New functions.

#include <octave/oct.h>
#include <octave/parse.h>

DEFUN_DLD (funcdemo, args, nargout, "Function Demo")
{
  int nargin = args.length ();
  octave_value_list retval;

  if (nargin < 2)
    print_usage ();
  else
    {
      octave_value_list newargs;
      for (octave_idx_type i = nargin - 1; i > 0; i--)
        newargs (i - 1) = args(i);
      if (args(0).is_function_handle ()
          || args(0).is_inline_function ())
        {
          octave_function *fcn = args(0).function_value ();
          if (! error_state)
            retval = feval (fcn, newargs, nargout);
        }
      else if (args(0).is_string ())
        {
          std::string fcn = args (0).string_value ();
          if (! error_state)
            retval = feval (fcn, newargs, nargout);
        }
      else
        error ("funcdemo: expected string,",
               " inline or function handle");
    }
  return retval;
}