[gnome-control-center] shell: Mirror the main leaflet's 'folded' property

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

commit a4ab41194b13b15ba98bb4c6ba774bcc425c7cf5
Author: Guido Günther <agx sigxcpu org>
Date:   Tue Aug 24 18:23:51 2021 +0200

    shell: Mirror the main leaflet's 'folded' property
    
    This makes it simpler for panels to check whether g-c-c
    is in folded state.

 shell/cc-window.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)
---
diff --git a/shell/cc-window.c b/shell/cc-window.c
index 6e72ef7ca..192b57a74 100644
--- a/shell/cc-window.c
+++ b/shell/cc-window.c
@@ -81,6 +81,8 @@ struct _CcWindow
   CcPanel *active_panel;
   GSettings *settings;
 
+  gboolean folded;
+
   CcPanelListView previous_list_view;
 
   gint current_width;
@@ -97,7 +99,8 @@ enum
 {
   PROP_0,
   PROP_ACTIVE_PANEL,
-  PROP_MODEL
+  PROP_MODEL,
+  PROP_FOLDED,
 };
 
 /* Auxiliary methods */
@@ -830,6 +833,10 @@ cc_window_get_property (GObject    *object,
       g_value_set_object (value, self->store);
       break;
 
+    case PROP_FOLDED:
+      g_value_set_boolean (value, self->folded);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
     }
@@ -854,6 +861,10 @@ cc_window_set_property (GObject      *object,
       self->store = g_value_dup_object (value);
       break;
 
+    case PROP_FOLDED:
+      self->folded = g_value_get_boolean (value);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
     }
@@ -956,6 +967,14 @@ cc_window_class_init (CcWindowClass *klass)
                                                         CC_TYPE_SHELL_MODEL,
                                                         G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | 
G_PARAM_STATIC_STRINGS));
 
+  g_object_class_install_property (object_class,
+                                   PROP_FOLDED,
+                                   g_param_spec_boolean ("folded",
+                                                         "Folded",
+                                                         "Whether the window is foled",
+                                                         FALSE,
+                                                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/ControlCenter/gtk/cc-window.ui");
 
   gtk_widget_class_bind_template_child (widget_class, CcWindow, back_revealer);
@@ -1001,6 +1020,12 @@ cc_window_init (CcWindow *self)
   self->previous_panels = g_queue_new ();
   self->previous_list_view = cc_panel_list_get_view (self->panel_list);
 
+  g_object_bind_property (self->main_leaflet,
+                          "folded",
+                          self,
+                          "folded",
+                          G_BINDING_SYNC_CREATE);
+
   /* Add a custom CSS class on development builds */
   if (in_flatpak_sandbox ())
     gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (self)), "devel");