[glom/gtkmm4v4: 36/37] gtkmm4: Treemodels: Use const_iterator for some vfunc parameters.

[Murray Cumming <murrayc src gnome org>]

commit d1ac5d9b03d19ec5b26cd2f05b22197d649630c2
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Mar 15 15:43:52 2017 +0100

    gtkmm4: Treemodels: Use const_iterator for some vfunc parameters.
    
    To match changed API in gtkmm4.

 glom/mode_data/datawidget/treemodel_db.cc          |   10 +++++-----
 glom/mode_data/datawidget/treemodel_db.h           |   10 +++++-----
 .../datawidget/treemodel_db_withextratext.cc       |    2 +-
 .../datawidget/treemodel_db_withextratext.h        |    2 +-
 4 files changed, 12 insertions(+), 12 deletions(-)
---
diff --git a/glom/mode_data/datawidget/treemodel_db.cc b/glom/mode_data/datawidget/treemodel_db.cc
index b924e69..f9096b4 100644
--- a/glom/mode_data/datawidget/treemodel_db.cc
+++ b/glom/mode_data/datawidget/treemodel_db.cc
@@ -420,7 +420,7 @@ GType DbTreeModel::get_column_type_vfunc(int index) const
     return 0;
 }
 
-void DbTreeModel::get_value_vfunc(const TreeModel::iterator& iter, int column, Glib::ValueBase& value) const
+void DbTreeModel::get_value_vfunc(const TreeModel::const_iterator& iter, int column, Glib::ValueBase& value) 
const
 {
   //std::cout << "debug: " << G_STRFUNC << ": column=" << column << std::endl;
 
@@ -547,12 +547,12 @@ bool DbTreeModel::iter_children_vfunc(const iterator& parent, iterator& iter) co
   return iter_nth_child_vfunc(parent, 0, iter);
 }
 
-bool DbTreeModel::iter_has_child_vfunc(const iterator& /* iter */) const
+bool DbTreeModel::iter_has_child_vfunc(const const_iterator& /* iter */) const
 {
   return false;
 }
 
-int DbTreeModel::iter_n_children_vfunc(const iterator& iter) const
+int DbTreeModel::iter_n_children_vfunc(const const_iterator& iter) const
 {
   if(!check_treeiter_validity(iter))
     return iter_n_root_children_vfunc();
@@ -629,7 +629,7 @@ bool DbTreeModel::iter_parent_vfunc(const iterator& child, iterator& iter) const
   return false; //There are no children, so no parents.
 }
 
-Gtk::TreeModel::Path DbTreeModel::get_path_vfunc(const iterator& iter) const
+Gtk::TreeModel::Path DbTreeModel::get_path_vfunc(const const_iterator& iter) const
 {
   const auto datamodel_row = get_datamodel_row_index_from_tree_row_iter(iter);
 
@@ -720,7 +720,7 @@ bool DbTreeModel::check_treeiter_validity(const const_iterator& iter) const
   return m_stamp == iter.get_stamp();
 }
 
-bool DbTreeModel::iter_is_valid(const iterator& iter) const
+bool DbTreeModel::iter_is_valid(const const_iterator& iter) const
 {
   return check_treeiter_validity(iter);
 }
diff --git a/glom/mode_data/datawidget/treemodel_db.h b/glom/mode_data/datawidget/treemodel_db.h
index 09a1f9e..e4c443f 100644
--- a/glom/mode_data/datawidget/treemodel_db.h
+++ b/glom/mode_data/datawidget/treemodel_db.h
@@ -164,23 +164,23 @@ protected:
    Gtk::TreeModelFlags get_flags_vfunc() const override;
    int get_n_columns_vfunc() const override;
    GType get_column_type_vfunc(int index) const override;
-   void get_value_vfunc(const TreeModel::iterator& iter, int column, Glib::ValueBase& value) const override;
+   void get_value_vfunc(const TreeModel::const_iterator& iter, int column, Glib::ValueBase& value) const 
override;
 
    bool iter_next_vfunc(const iterator& iter, iterator& iter_next) const override;
 
    //TODO: Make sure that we make all of these const when we have made them all const in the TreeModel:
    bool iter_children_vfunc(const iterator& parent, iterator& iter) const override;
-   bool iter_has_child_vfunc(const iterator& iter) const override;
-   int iter_n_children_vfunc(const iterator& iter) const override;
+   bool iter_has_child_vfunc(const const_iterator& iter) const override;
+   int iter_n_children_vfunc(const const_iterator& iter) const override;
    int iter_n_root_children_vfunc() const override;
    bool iter_nth_child_vfunc(const iterator& parent, int n, iterator& iter) const override;
    bool iter_nth_root_child_vfunc(int n, iterator& iter) const override;
    bool iter_parent_vfunc(const iterator& child, iterator& iter) const override;
-   Path get_path_vfunc(const iterator& iter) const override;
+   Path get_path_vfunc(const const_iterator& iter) const override;
    bool get_iter_vfunc(const Path& path, iterator& iter) const override;
 private:
 
-   bool iter_is_valid(const iterator& iter) const;
+   bool iter_is_valid(const const_iterator& iter) const;
 
    void set_value_impl(const iterator& row, int column, const Glib::ValueBase& value) override;
 
diff --git a/glom/mode_data/datawidget/treemodel_db_withextratext.cc 
b/glom/mode_data/datawidget/treemodel_db_withextratext.cc
index 4ad88d2..8eb4621 100644
--- a/glom/mode_data/datawidget/treemodel_db_withextratext.cc
+++ b/glom/mode_data/datawidget/treemodel_db_withextratext.cc
@@ -90,7 +90,7 @@ GType DbTreeModelWithExtraText::get_column_type_vfunc(int index) const
     return DbTreeModel::get_column_type_vfunc(index);
 }
 
-void DbTreeModelWithExtraText::get_value_vfunc(const TreeModel::iterator& iter, int column, Glib::ValueBase& 
value) const
+void DbTreeModelWithExtraText::get_value_vfunc(const TreeModel::const_iterator& iter, int column, 
Glib::ValueBase& value) const
 {
   //std::cout << G_STRFUNC << ": Debug: column=" << column << std::endl;
   if(column == get_text_column())
diff --git a/glom/mode_data/datawidget/treemodel_db_withextratext.h 
b/glom/mode_data/datawidget/treemodel_db_withextratext.h
index 92aa7af..0696693 100644
--- a/glom/mode_data/datawidget/treemodel_db_withextratext.h
+++ b/glom/mode_data/datawidget/treemodel_db_withextratext.h
@@ -59,7 +59,7 @@ public:
 private:
   int get_n_columns_vfunc() const override;
   GType get_column_type_vfunc(int index) const override;
-  void get_value_vfunc(const TreeModel::iterator& iter, int column, Glib::ValueBase& value) const override;
+  void get_value_vfunc(const TreeModel::const_iterator& iter, int column, Glib::ValueBase& value) const 
override;
 
 
   int m_column_index_first; //The index of the first field in the TreeModel.