1 files changed, 89 insertions, 0 deletions
diff --git a/indra/newview/lldndbutton.h b/indra/newview/lldndbutton.h
new file mode 100644
index 0000000000..c888268187
--- /dev/null
+++ b/indra/newview/lldndbutton.h
@@ -0,0 +1,89 @@
+/**
+ * @file lldndbutton.h
+ * @brief Declaration of the drag-n-drop button.
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
+ * Copyright (c) 2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#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(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