[gtk+] listbox: handle moving mouse out of widget with button down

[Alexander Larsson <alexl src gnome org>]

commit 207703155b3128ddb7b1b3cb45a0c31e2e1ac0c9
Author: Alexander Larsson <alexl redhat com>
Date:   Mon Jun 17 15:13:17 2013 +0200

    listbox: handle moving mouse out of widget with button down
    
    Unset active row, etc when mousing out of the widget totally.

 gtk/gtklistbox.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtklistbox.c b/gtk/gtklistbox.c
index 88edaad..a5f5065 100644
--- a/gtk/gtklistbox.c
+++ b/gtk/gtklistbox.c
@@ -88,6 +88,7 @@ struct _GtkListBoxPrivate
   GtkListBoxRow *drag_highlighted_row;
 
   int n_visible_rows;
+  gboolean in_widget;
 };
 
 struct _GtkListBoxRowPrivate
@@ -1134,6 +1135,8 @@ gtk_list_box_real_enter_notify_event (GtkWidget        *widget,
   if (event->window != gtk_widget_get_window (GTK_WIDGET (list_box)))
     return FALSE;
 
+  list_box->priv->in_widget = TRUE;
+
   row = gtk_list_box_get_row_at_y (list_box, event->y);
   gtk_list_box_update_prelight (list_box, row);
   gtk_list_box_update_active (list_box, row);
@@ -1152,7 +1155,10 @@ gtk_list_box_real_leave_notify_event (GtkWidget        *widget,
     return FALSE;
 
   if (event->detail != GDK_NOTIFY_INFERIOR)
-    row = NULL;
+    {
+      list_box->priv->in_widget = FALSE;
+      row = NULL;
+    }
   else
     row = gtk_list_box_get_row_at_y (list_box, event->y);
 
@@ -1172,6 +1178,9 @@ gtk_list_box_real_motion_notify_event (GtkWidget      *widget,
   gint relative_y;
   gdouble parent_y;
 
+  if (!list_box->priv->in_widget)
+    return FALSE;
+
   window = gtk_widget_get_window (GTK_WIDGET (list_box));
   event_window = event->window;
   relative_y = event->y;