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.

--- a/libgui/src/octave-qt-link.cc
+++ b/libgui/src/octave-qt-link.cc
@@ -69,7 +69,8 @@
 }
 
 void
-octave_qt_link::do_set_workspace (const std::list<workspace_element>& ws)
+octave_qt_link::do_set_workspace (bool top_level,
+                                  const std::list<workspace_element>& ws)
 {
   QString scopes;
   QStringList symbols;
@@ -87,7 +88,8 @@
       values.append (QString::fromStdString (it->value ()));
     }
 
-  emit set_workspace_signal (scopes, symbols, class_names, dimensions, values);
+  emit set_workspace_signal (top_level, scopes, symbols, class_names,
+                             dimensions, values);
 }
 
 void