From c1f71e4aba90bae6c8d9a14540764b5eacaf1204 Mon Sep 17 00:00:00 2001
From: "hyatt%netscape.com" <hyatt%netscape.com>
Date: Wed, 23 Jun 1999 09:15:48 +0000
Subject: [PATCH] Adding a scrollbar listener object, so I can be notified.

---
 layout/xul/base/src/nsIScrollbarListener.h | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 layout/xul/base/src/nsIScrollbarListener.h

diff --git a/layout/xul/base/src/nsIScrollbarListener.h b/layout/xul/base/src/nsIScrollbarListener.h
new file mode 100644
index 000000000000..98e3ae0b5b3d
--- /dev/null
+++ b/layout/xul/base/src/nsIScrollbarListener.h
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Mozilla Communicator client code.
+ *
+ * The Initial Developer of the Original Code is Netscape Communications
+ * Corporation.  Portions created by Netscape are Copyright (C) 1998
+ * Netscape Communications Corporation.  All Rights Reserved.
+ */
+
+#ifndef nsIScrollbarListener_h___
+#define nsIScrollbarListener_h___
+
+// {A0ADBD81-2911-11d3-97FA-00400553EEF0}
+#define NS_ISCROLLBARLISTENER_IID \
+{ 0xa0adbd81, 0x2911, 0x11d3, { 0x97, 0xfa, 0x0, 0x40, 0x5, 0x53, 0xee, 0xf0 } }
+
+static NS_DEFINE_IID(kIScrollbarListenerIID,     NS_ISCROLLBARLISTENER_IID);
+
+class nsIScrollbarListener : public nsISupports {
+
+public:
+
+  static const nsIID& GetIID() { static nsIID iid = NS_ISCROLLBARLISTENER_IID; return iid; }
+  
+  NS_IMETHOD PositionChanged(PRInt32 aOldIndex, PRInt32 aNewIndex) = 0;
+
+};
+
+#endif
+