CDropTargetHelper.h

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/*
 *  file system folder
 *
 *  Copyright 1997              Marcus Meissner
 *  Copyright 1998, 1999, 2002  Juergen Schmied
 *  Copyright 2009              Andrew Hill
 *
 * 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; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * 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 St, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#ifndef _DRAGDROPHELPER_H_
#define _DRAGDROPHELPER_H_
 
class CDropTargetHelper :
    public CComCoClass<CDropTargetHelper, &CLSID_DragDropHelper>,
    public CComObjectRootEx<CComMultiThreadModelNoCS>,
    public IDragSourceHelper,
    public IDropTargetHelper
{
private:
public:
    CDropTargetHelper();
    ~CDropTargetHelper();
 
    virtual HRESULT WINAPI InitializeFromBitmap(LPSHDRAGIMAGE pshdi, IDataObject *pDataObject);
    virtual HRESULT WINAPI InitializeFromWindow(HWND hwnd, POINT *ppt, IDataObject *pDataObject);
 
    STDMETHOD(DragEnter)(HWND hwndTarget, IDataObject* pDataObject, POINT* ppt, DWORD dwEffect) override;
    STDMETHOD(DragLeave)() override;
    STDMETHOD(DragOver)(POINT *ppt, DWORD dwEffect) override;
    STDMETHOD(Drop)(IDataObject* pDataObject, POINT* ppt, DWORD dwEffect) override;
    STDMETHOD(Show)(BOOL fShow) override;
 
DECLARE_REGISTRY_RESOURCEID(IDR_DRAGDROPHELPER)
DECLARE_NOT_AGGREGATABLE(CDropTargetHelper)
 
DECLARE_PROTECT_FINAL_CONSTRUCT()
 
BEGIN_COM_MAP(CDropTargetHelper)
    COM_INTERFACE_ENTRY_IID(IID_IDragSourceHelper, IDragSourceHelper)
    COM_INTERFACE_ENTRY_IID(IID_IDropTargetHelper, IDropTargetHelper)
END_COM_MAP()
};
 
#endif /* _DRAGDROPHELPER_H_ */