win32_dragdrop.hpp

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/*****************************************************************************
 * win32_dragdrop.hpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id: c7f80d83b5cd1cc9869c225e76143096570c2900 $
 *
 * Authors: Cyril Deguet     <asmax@via.ecp.fr>
 *          Olivier Teulière <ipkiss@via.ecp.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef WIN32_DRAGDROP_HPP
#define WIN32_DRAGDROP_HPP

#include <shellapi.h>
#include <ole2.h>
#include "../src/skin_common.hpp"


class Win32DragDrop: public SkinObject, public IDropTarget
{
public:
   Win32DragDrop( intf_thread_t *pIntf, bool playOnDrop );
   virtual ~Win32DragDrop() { }

protected:
    // IUnknown methods
    STDMETHOD(QueryInterface)( REFIID riid, void FAR* FAR* ppvObj );
    STDMETHOD_(ULONG, AddRef)();
    STDMETHOD_(ULONG, Release)();

    // IDropTarget methods
    STDMETHOD(DragEnter)( LPDATAOBJECT pDataObj, DWORD grfKeyState,
                          POINTL pt, DWORD *pdwEffect );
    STDMETHOD(DragOver)( DWORD grfKeyState, POINTL pt, DWORD *pdwEffect );
    STDMETHOD(DragLeave)();
    STDMETHOD(Drop)( LPDATAOBJECT pDataObj, DWORD grfKeyState,
                     POINTL pt, DWORD *pdwEffect );

private:
    /// Internal reference counter
    unsigned long m_references;
    /// Indicates whether the file(s) must be played immediately
    bool m_playOnDrop;

    /// Helper function
    void HandleDrop( HDROP HDrop );
};


#endif