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diff --git a/indra/newview/lldndbutton.h b/indra/newview/lldndbutton.h
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+/**
+ * @file lldndbutton.h
+ * @brief Declaration of the drag-n-drop button.
+ *
+ * $LicenseInfo:firstyear=2009&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLDNDBUTTON_H
+#define LL_LLDNDBUTTON_H
+
+#include "llbutton.h"
+
+/**
+ * Class representing a button which can handle Drag-And-Drop event.
+ *
+ * LLDragAndDropButton does not contain any logic to handle Drag-And-Drop itself.
+ * Instead it provides drag_drop_handler_t which can be set to the button.
+ * Then each Drag-And-Drop will be delegated to this handler without any pre/post processing.
+ *
+ * All xml parameters are the same as LLButton has.
+ *
+ * @see LLLandmarksPanel for example of usage of this class.
+ */
+class LLDragAndDropButton : public LLButton
+{
+public:
+	struct Params : public LLInitParam::Block<Params, LLButton::Params>
+	{
+		Params();
+	};
+
+	LLDragAndDropButton(const Params& params);
+
+	typedef boost::function<bool (
+		S32 /*x*/, S32 /*y*/, MASK /*mask*/, BOOL /*drop*/,
+		EDragAndDropType /*cargo_type*/,
+		void* /*cargo_data*/,
+		EAcceptance* /*accept*/,
+		std::string& /*tooltip_msg*/)> drag_drop_handler_t;
+
+
+	/**
+	 * Sets a handler which should process Drag-And-Drop.
+	 */
+	void setDragAndDropHandler(drag_drop_handler_t handler) { mDragDropHandler = handler; }
+
+
+	/**
+	 * Process Drag-And-Drop by delegating the event to drag_drop_handler_t.
+	 * 
+	 * @return BOOL - value returned by drag_drop_handler_t if it is set, FALSE otherwise.
+	 */
+	/*virtual*/ BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
+		EDragAndDropType cargo_type,
+		void* cargo_data,
+		EAcceptance* accept,
+		std::string& tooltip_msg);
+
+private:
+	drag_drop_handler_t mDragDropHandler;
+};
+
+
+#endif // LL_LLDNDBUTTON_H