[gtk+] texthandle: Set prelight state on the pointer-interacted handle

[Matthias Clasen <matthiasc src gnome org>]

commit 1e8be1c446d2c9dc695c5a378c9422b5c576e1f6
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jun 4 19:49:33 2015 +0200

    texthandle: Set prelight state on the pointer-interacted handle
    
    This will be useful with the theming changes to come.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=750396

 gtk/gtktexthandle.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtktexthandle.c b/gtk/gtktexthandle.c
index 7faea0c..07a9569 100644
--- a/gtk/gtktexthandle.c
+++ b/gtk/gtktexthandle.c
@@ -221,6 +221,15 @@ gtk_text_handle_widget_event (GtkWidget     *widget,
       priv->windows[pos].dragged = FALSE;
       gtk_text_handle_unset_state (handle, pos, GTK_STATE_FLAG_ACTIVE);
     }
+  else if (event->type == GDK_ENTER_NOTIFY)
+    gtk_text_handle_set_state (handle, pos, GTK_STATE_FLAG_PRELIGHT);
+  else if (event->type == GDK_LEAVE_NOTIFY)
+    {
+      if (!priv->windows[pos].dragged &&
+          (event->crossing.mode == GDK_CROSSING_NORMAL ||
+           event->crossing.mode == GDK_CROSSING_UNGRAB))
+        gtk_text_handle_unset_state (handle, pos, GTK_STATE_FLAG_PRELIGHT);
+    }
   else if (event->type == GDK_MOTION_NOTIFY &&
            event->motion.state & GDK_BUTTON1_MASK &&
            priv->windows[pos].dragged)
@@ -277,6 +286,8 @@ _gtk_text_handle_ensure_widget (GtkTextHandle         *handle,
       gtk_widget_set_events (widget,
                              GDK_BUTTON_PRESS_MASK |
                              GDK_BUTTON_RELEASE_MASK |
+                             GDK_ENTER_NOTIFY_MASK |
+                             GDK_LEAVE_NOTIFY_MASK |
                              GDK_POINTER_MOTION_MASK);
 
       g_signal_connect (widget, "draw",