[gnome-control-center] window: Replace child names with widget references

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit c2567b9c3e6d6b86875a5f5b0a2b7fcb16a456a1
Author: Robert Ancell <robert ancell canonical com>
Date:   Sat Sep 21 08:07:18 2019 +0400

    window: Replace child names with widget references
    
    Using child names can cause code to be broken if a name is changed - this wont
    be picked up as an error in the compiler.

 shell/cc-window.c  | 28 ++++++++++++++++++++++------
 shell/cc-window.ui | 13 -------------
 2 files changed, 22 insertions(+), 19 deletions(-)
---
diff --git a/shell/cc-window.c b/shell/cc-window.c
index 593886d39..fde0dad8c 100644
--- a/shell/cc-window.c
+++ b/shell/cc-window.c
@@ -58,6 +58,7 @@ struct _CcWindow
   GtkWidget  *header;
   GtkWidget  *header_box;
   GtkWidget  *main_leaflet;
+  GtkWidget  *sidebar_box;
   GtkWidget  *list_scrolled;
   GtkWidget  *panel_headerbar;
   GtkWidget  *search_scrolled;
@@ -129,11 +130,25 @@ remove_all_custom_widgets (CcWindow *self)
   CC_EXIT;
 }
 
+static void
+show_panel (CcWindow *self)
+{
+  hdy_leaflet_set_visible_child (HDY_LEAFLET (self->main_leaflet), self->stack);
+  hdy_leaflet_set_visible_child (HDY_LEAFLET (self->header_box), self->panel_headerbar);
+}
+
+static void
+show_sidebar (CcWindow *self)
+{
+  hdy_leaflet_set_visible_child (HDY_LEAFLET (self->main_leaflet), self->sidebar_box);
+  hdy_leaflet_set_visible_child (HDY_LEAFLET (self->header_box), self->header);
+}
+
 static void
 on_sidebar_activated_cb (CcPanel  *panel,
                          CcWindow *self)
 {
-  hdy_leaflet_set_visible_child_name (HDY_LEAFLET (self->main_leaflet), "panel");
+  show_panel (self);
 }
 
 static gboolean
@@ -415,7 +430,7 @@ set_active_panel_from_id (CcShell      *shell,
     {
       g_object_set (G_OBJECT (self->current_panel), "parameters", parameters, NULL);
       if (force_moving_to_the_panel || self->previous_list_view == view)
-        hdy_leaflet_set_visible_child_name (HDY_LEAFLET (self->main_leaflet), "panel");
+        show_panel (self);
       self->previous_list_view = view;
       CC_RETURN (TRUE);
     }
@@ -451,7 +466,7 @@ set_active_panel_from_id (CcShell      *shell,
     add_current_panel_to_history (shell, start_id);
 
   if (force_moving_to_the_panel)
-    hdy_leaflet_set_visible_child_name (HDY_LEAFLET (self->main_leaflet), "panel");
+    show_panel (self);
 
   g_free (self->current_panel_id);
   self->current_panel_id = g_strdup (start_id);
@@ -575,9 +590,9 @@ search_entry_activate_cb (GtkEntry *entry,
 
 static void
 back_button_clicked_cb (GtkButton *button,
-                        CcWindow  *shell)
+                        CcWindow  *self)
 {
-  hdy_leaflet_set_visible_child_name (HDY_LEAFLET (shell->main_leaflet), "sidebar");
+  show_sidebar (self);
 }
 
 static void
@@ -851,7 +866,7 @@ cc_window_constructed (GObject *object)
                             self);
 
   update_headerbar_buttons (self);
-  hdy_leaflet_set_visible_child_name (HDY_LEAFLET (self->main_leaflet), "sidebar");
+  show_sidebar (self);
 
   G_OBJECT_CLASS (cc_window_parent_class)->constructed (object);
 }
@@ -919,6 +934,7 @@ cc_window_class_init (CcWindowClass *klass)
   gtk_widget_class_bind_template_child (widget_class, CcWindow, header_sizegroup);
   gtk_widget_class_bind_template_child (widget_class, CcWindow, list_scrolled);
   gtk_widget_class_bind_template_child (widget_class, CcWindow, main_leaflet);
+  gtk_widget_class_bind_template_child (widget_class, CcWindow, sidebar_box);
   gtk_widget_class_bind_template_child (widget_class, CcWindow, panel_headerbar);
   gtk_widget_class_bind_template_child (widget_class, CcWindow, panel_list);
   gtk_widget_class_bind_template_child (widget_class, CcWindow, previous_button);
diff --git a/shell/cc-window.ui b/shell/cc-window.ui
index e7b2a5d89..823cd81e2 100644
--- a/shell/cc-window.ui
+++ b/shell/cc-window.ui
@@ -76,9 +76,6 @@
               </packing>
             </child>
           </object>
-          <packing>
-            <property name="name">sidebar</property>
-          </packing>
         </child>
         <child>
           <object class="GtkSeparator" id="panel_separator">
@@ -102,9 +99,6 @@
               <class name="background"/>
             </style>
           </object>
-          <packing>
-            <property name="name">panel</property>
-          </packing>
         </child>
       </object>
     </child>
@@ -121,7 +115,6 @@
             <property name="mode-transition-duration" bind-source="main_leaflet" 
bind-property="mode-transition-duration" bind-flags="bidirectional|sync-create"/>
             <property name="child-transition-type" bind-source="main_leaflet" 
bind-property="child-transition-type" bind-flags="bidirectional|sync-create"/>
             <property name="child-transition-duration" bind-source="main_leaflet" 
bind-property="child-transition-duration" bind-flags="bidirectional|sync-create"/>
-            <property name="visible-child-name" bind-source="main_leaflet" 
bind-property="visible-child-name" bind-flags="bidirectional|sync-create"/>
             <signal name="notify::visible-child" handler="notify_header_visible_child_cb" swapped="no"/>
             <signal name="notify::fold" handler="notify_fold_cb" object="CcWindow" after="yes" swapped="no"/>
             <child>
@@ -201,9 +194,6 @@
                   </packing>
                 </child>
               </object>
-              <packing>
-                <property name="name">sidebar</property>
-              </packing>
             </child>
             <child>
               <object class="GtkSeparator" id="header_separator">
@@ -270,9 +260,6 @@
                   </packing>
                 </child>
               </object>
-              <packing>
-                <property name="name">panel</property>
-              </packing>
             </child>
           </object>
         </child>