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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> {};
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
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