[gnome-builder] libide/gtk: add IdeTreeExpander:expanded convenience property

[Christian Hergert <chergert src gnome org>]

commit 644cef109eecdec74b3a300e686b7f2efbdb9caf
Author: Christian Hergert <chergert redhat com>
Date:   Mon Sep 19 16:36:29 2022 -0700

    libide/gtk: add IdeTreeExpander:expanded convenience property

 src/libide/gtk/ide-tree-expander.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/src/libide/gtk/ide-tree-expander.c b/src/libide/gtk/ide-tree-expander.c
index 1765dcabf..05eb5c920 100644
--- a/src/libide/gtk/ide-tree-expander.c
+++ b/src/libide/gtk/ide-tree-expander.c
@@ -45,6 +45,7 @@ struct _IdeTreeExpander
 
 enum {
   PROP_0,
+  PROP_EXPANDED,
   PROP_EXPANDED_ICON_NAME,
   PROP_ICON_NAME,
   PROP_ITEM,
@@ -137,6 +138,8 @@ ide_tree_expander_notify_expanded_cb (IdeTreeExpander *self,
   g_assert (GTK_IS_TREE_LIST_ROW (list_row));
 
   ide_tree_expander_update_icon (self);
+
+  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_EXPANDED]);
 }
 
 static void
@@ -234,6 +237,10 @@ ide_tree_expander_get_property (GObject    *object,
 
   switch (prop_id)
     {
+    case PROP_EXPANDED:
+      g_value_set_boolean (value, gtk_tree_list_row_get_expanded (self->list_row));
+      break;
+
     case PROP_EXPANDED_ICON_NAME:
       g_value_set_string (value, ide_tree_expander_get_expanded_icon_name (self));
       break;
@@ -316,6 +323,11 @@ ide_tree_expander_class_init (IdeTreeExpanderClass *klass)
   object_class->get_property = ide_tree_expander_get_property;
   object_class->set_property = ide_tree_expander_set_property;
 
+  properties [PROP_EXPANDED] =
+    g_param_spec_boolean ("expanded", NULL, NULL,
+                          FALSE,
+                          (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
   properties[PROP_EXPANDED_ICON_NAME] =
     g_param_spec_string ("expanded-icon-name", NULL, NULL,
                          NULL,