Make set_selectable a GncOptionsGtkUIItem member function.

Callable from the option object with set_ui_item_selectable and from
Scheme as gnc-option-db-set-option-selectable-by-name.

gnucash/gnome-utils/dialog-options.cpp

@@ -170,6 +170,13 @@ GncOptionGtkUIItem::~GncOptionGtkUIItem()
         g_object_unref(m_widget);
 }
 
+void
+GncOptionGtkUIItem::set_selectable(bool selectable) const noexcept
+{
+    if (m_widget)
+        gtk_widget_set_sensitive (m_widget, selectable);
+}
+
 void
 GncOptionGtkUIItem::clear_ui_item()
 {
@@ -290,24 +297,6 @@ gnc_option_changed_option_cb(GtkWidget *dummy, GncOption* option)
 }
 
 
-/*
- * set_selectable                               *
- *   Change the selectable state of the widget that represents a
- *   GUI option.
- *
- * option      - option to change widget state for
- * selectable  - if false, update the widget so that it
- *                     cannot be selected by the user.  If true,
- *                     update the widget so that it can be selected.
- */
-static void
-set_selectable (GncOption& option, bool selectable)
-{
-    auto widget = gnc_option_get_gtk_widget(&option);
-    if (widget)
-        gtk_widget_set_sensitive (widget, selectable);
-}
-
 // This do-nothing template is specialized for each GncOptionUIType.
 template<GncOptionUIType type> GtkWidget*
 create_option_widget(GncOption& option, GtkGrid*, GtkLabel*, char*, GtkWidget**,

gnucash/gnome-utils/dialog-options.hpp

@@ -50,6 +50,7 @@ public:
     GncOptionGtkUIItem(const GncOptionGtkUIItem& item);
     GncOptionGtkUIItem(GncOptionGtkUIItem&&) = default;
     virtual ~GncOptionGtkUIItem() override;
+    virtual void set_selectable(bool) const noexcept override;
     void clear_ui_item() override;
     void set_widget(GtkWidget* widget);
     virtual GtkWidget* const get_widget() const { return m_widget; }

libgnucash/app-utils/gnc-option-ui.hpp

@@ -51,6 +51,7 @@ public:
     GncOptionUIType get_ui_type() const noexcept { return m_type; }
     virtual void set_dirty(bool status) noexcept { m_dirty = status; }
     virtual bool get_dirty() const noexcept { return m_dirty; }
+    virtual void set_selectable(bool selectable) const noexcept = 0;
     virtual void clear_ui_item() = 0;
     virtual void set_ui_item_from_option(GncOption& option) noexcept = 0;
     virtual void set_option_from_ui_item(GncOption& option) noexcept = 0;

libgnucash/app-utils/gnc-option.cpp

@@ -193,6 +193,13 @@ GncOption::set_ui_item(GncOptionUIItemPtr&& ui_item)
     m_ui_item = std::move(ui_item);
 }
 
+void
+GncOption::set_ui_item_selectable(bool selectable) const noexcept
+{
+    if (m_ui_item)
+        m_ui_item->set_selectable(selectable);
+}
+
 const GncOptionUIType
 GncOption::get_ui_type() const
 {

libgnucash/app-utils/gnc-option.hpp

@@ -98,6 +98,7 @@ public:
     const std::string& get_docstring() const;
     void set_ui_item(GncOptionUIItemPtr&& ui_elem);
     const GncOptionUIType get_ui_type() const;
+    void set_ui_item_selectable(bool) const noexcept;
     GncOptionUIItem* const get_ui_item() const;
     void set_ui_item_from_option();
     void set_option_from_ui_item();

libgnucash/app-utils/gnc-optiondb.i

@@ -768,6 +768,16 @@ wrap_unique_ptr(GncOptionDBPtr, GncOptionDB);
     {
         return optiondb->find_option(section, name);
     }
+
+    void
+    gnc_option_db_set_option_selectable_by_name(GncOptionDBPtr& odb,
+                                                const char* section,
+                                                const char* name,
+                                                bool selectable)
+    {
+        auto option{odb->find_option(section, name)};
+        option->set_ui_item_selectable(selectable);
+    }
 %}
 
 #endif //SWIGGUILE

libgnucash/app-utils/test/gtest-gnc-option.cpp

@@ -526,6 +526,7 @@ public:
     ~OptionUIItem() = default;
     void set_dirty(bool status) noexcept override { m_dirty = status; }
     bool get_dirty() const noexcept override { return m_dirty; }
+    void set_selectable(bool selectable) const noexcept override {}
     void clear_ui_item() override { m_widget.clear(); }
     void set_ui_item_from_option(GncOption& option) noexcept override
     {