[gtk+] widget: Make parent property read-only

[Timm Bäder <baedert src gnome org>]

commit 91f40eb088f78e6a6e617d21784848e75511c9fa
Author: Timm Bäder <mail baedert org>
Date:   Sun Oct 29 18:03:10 2017 +0100

    widget: Make parent property read-only

 gtk/gtkwidget.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index d603906..5efeb80 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -1091,7 +1091,7 @@ gtk_widget_class_init (GtkWidgetClass *klass)
                            P_("Parent widget"),
                            P_("The parent widget of this widget."),
                            GTK_TYPE_WIDGET,
-                           GTK_PARAM_READWRITE);
+                           GTK_PARAM_READABLE|G_PARAM_EXPLICIT_NOTIFY);
 
   widget_props[PROP_WIDTH_REQUEST] =
       g_param_spec_int ("width-request",
@@ -3166,9 +3166,6 @@ gtk_widget_set_property (GObject         *object,
     case PROP_NAME:
       gtk_widget_set_name (widget, g_value_get_string (value));
       break;
-    case PROP_PARENT:
-      gtk_container_add (GTK_CONTAINER (g_value_get_object (value)), widget);
-      break;
     case PROP_WIDTH_REQUEST:
       gtk_widget_set_usize_internal (widget, g_value_get_int (value), -2);
       break;