revealer: emit notify::child-revealed when animation stops

Depending of float rounding during target calculation, the size of the
GtkRevealer can be set to zero will the animation is not finished.
If the GtkRevealer is in a GtkPaned, it will be hidden and so the animation
will be stopped before it is finished.

In this case, force the emission of the child-revealed signal to let
client code know the animation is finished.

https://bugzilla.gnome.org/show_bug.cgi?id=765973

diff --git a/gtk/gtkrevealer.c b/gtk/gtkrevealer.c
index 49d9048dd2aa045ba4f5d8e1f3646b244769e565..b23f66a7e118420e610855142aad4809a6c4a58c 100644 (file)
--- a/gtk/gtkrevealer.c
+++ b/gtk/gtkrevealer.c
@@ -632,8 +632,11 @@ static void
 gtk_revealer_stop_animation (GtkRevealer *revealer)
 {
   GtkRevealerPrivate *priv = gtk_revealer_get_instance_private (revealer);
-
-  priv->current_pos = priv->target_pos;
+  if (priv->current_pos != priv->target_pos)
+    {
+      priv->current_pos = priv->target_pos;
+      g_object_notify_by_pspec (G_OBJECT (revealer), props[PROP_CHILD_REVEALED]);
+    }
   if (priv->tick_id != 0)
     {
       gtk_widget_remove_tick_callback (GTK_WIDGET (revealer), priv->tick_id);