wxWidgets/include/wx/msw/ole/droptgt.h

73 lines
2.6 KiB
C++

///////////////////////////////////////////////////////////////////////////////
// Name: ole/droptgt.h
// Purpose: declaration of the wxDropTarget class
// Author: Vadim Zeitlin
// Modified by:
// Created: 06.03.98
// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_OLEDROPTGT_H
#define _WX_OLEDROPTGT_H
#if wxUSE_DRAG_AND_DROP
// ----------------------------------------------------------------------------
// forward declarations
// ----------------------------------------------------------------------------
class wxIDropTarget;
struct IDataObject;
// ----------------------------------------------------------------------------
// An instance of the class wxDropTarget may be associated with any wxWindow
// derived object via SetDropTarget() function. If this is done, the virtual
// methods of wxDropTarget are called when something is dropped on the window.
//
// Note that wxDropTarget is an abstract base class (ABC) and you should derive
// your own class from it implementing pure virtual function in order to use it
// (all of them, including protected ones which are called by the class itself)
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxDropTarget : public wxDropTargetBase
{
public:
// ctor & dtor
wxDropTarget(wxDataObject *dataObject = NULL);
virtual ~wxDropTarget();
// normally called by wxWindow on window creation/destruction, but might be
// called `manually' as well. Register() returns true on success.
bool Register(WXHWND hwnd);
void Revoke(WXHWND hwnd);
// provide default implementation for base class pure virtuals
virtual bool OnDrop(wxCoord x, wxCoord y);
virtual bool GetData();
// implementation only from now on
// -------------------------------
// do we accept this kind of data?
bool IsAcceptedData(IDataObject *pIDataSource) const;
// give us the data source from IDropTarget::Drop() - this is later used by
// GetData() when it's called from inside OnData()
void SetDataSource(IDataObject *pIDataSource);
private:
// helper used by IsAcceptedData() and GetData()
wxDataFormat GetSupportedFormat(IDataObject *pIDataSource) const;
wxIDropTarget *m_pIDropTarget; // the pointer to our COM interface
IDataObject *m_pIDataSource; // the pointer to the source data object
DECLARE_NO_COPY_CLASS(wxDropTarget)
};
#endif //wxUSE_DRAG_AND_DROP
#endif //_WX_OLEDROPTGT_H