[gtk+] widget: Don't change sensitive state with insensitve parent

[Benjamin Otte <otte src gnome org>]

commit 94f00eb04dd1433cf1cc9a3341f485124e38abd1
Author: Benjamin Otte <otte redhat com>
Date:   Thu Dec 15 20:32:54 2011 +0100

    widget: Don't change sensitive state with insensitve parent
    
    This way child.set_sensitive(True) with an insensitive parent doesn't
    cause child to become sensitive.

 gtk/gtkwidget.c |   35 ++++++++++++++++++++---------------
 1 files changed, 20 insertions(+), 15 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 4788747..7c189c4 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -7663,7 +7663,6 @@ gtk_widget_set_sensitive (GtkWidget *widget,
 			  gboolean   sensitive)
 {
   GtkWidgetPrivate *priv;
-  GtkStateData data;
 
   g_return_if_fail (GTK_IS_WIDGET (widget));
 
@@ -7674,24 +7673,30 @@ gtk_widget_set_sensitive (GtkWidget *widget,
   if (priv->sensitive == sensitive)
     return;
 
-  data.flags = GTK_STATE_FLAG_INSENSITIVE;
-
-  if (sensitive)
-    {
-      priv->sensitive = TRUE;
-      data.operation = STATE_CHANGE_UNSET;
-    }
-  else
+  if (priv->parent == NULL
+      || gtk_widget_is_sensitive (priv->parent))
     {
-      priv->sensitive = FALSE;
-      data.operation = STATE_CHANGE_SET;
-    }
+      GtkStateData data;
 
-  data.use_forall = TRUE;
+      data.flags = GTK_STATE_FLAG_INSENSITIVE;
 
-  gtk_widget_propagate_state (widget, &data);
+      if (sensitive)
+        {
+          priv->sensitive = TRUE;
+          data.operation = STATE_CHANGE_UNSET;
+        }
+      else
+        {
+          priv->sensitive = FALSE;
+          data.operation = STATE_CHANGE_SET;
+        }
 
-  gtk_widget_queue_resize (widget);
+      data.use_forall = TRUE;
+
+      gtk_widget_propagate_state (widget, &data);
+
+      gtk_widget_queue_resize (widget);
+    }
 
   g_object_notify (G_OBJECT (widget), "sensitive");
 }