[gtk/wip/dboles/entry-hover] SpinButton: Update :hover on widget from gadgets

[Daniel Boles <dboles src gnome org>]

commit dbcaa733bb6e95a69c98b57e6bb9164f547da00f
Author: Daniel Boles <dboles src gmail com>
Date:   Sat Apr 21 08:42:43 2018 +0100

    SpinButton: Update :hover on widget from gadgets
    
    Just as we treat hovering either icon in the parent Entry as needing to
    set PRELIGHT on the whole widget, do the same for the up/down buttons.
    
    https://gitlab.gnome.org/GNOME/gtk/issues/196
    https://gitlab.gnome.org/GNOME/gtk/merge_requests/122#note_99084

 gtk/gtkspinbutton.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkspinbutton.c b/gtk/gtkspinbutton.c
index 5a09ba8f36..d6edbcb1d3 100644
--- a/gtk/gtkspinbutton.c
+++ b/gtk/gtkspinbutton.c
@@ -1264,7 +1264,7 @@ gtk_spin_button_enter_notify (GtkWidget        *widget,
     {
       priv->in_child = event->window;
       update_node_state (spin);
-      gtk_widget_queue_draw (GTK_WIDGET (spin));
+      gtk_widget_set_state_flags (widget, GTK_STATE_FLAG_PRELIGHT, FALSE);
     }
 
   return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->enter_notify_event (widget, event);
@@ -1281,7 +1281,7 @@ gtk_spin_button_leave_notify (GtkWidget        *widget,
     {
       priv->in_child = NULL;
       update_node_state (spin);
-      gtk_widget_queue_draw (GTK_WIDGET (spin));
+      gtk_widget_unset_state_flags (widget, GTK_STATE_FLAG_PRELIGHT);
     }
 
   return GTK_WIDGET_CLASS (gtk_spin_button_parent_class)->leave_notify_event (widget, event);