pcsx2/3rdparty/wxwidgets3.0/include/wx/msw/ole/droptgt.h

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///////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/ole/droptgt.h
// Purpose: declaration of the wxDropTarget class
// Author: Vadim Zeitlin
// Modified by:
// Created: 06.03.98
// 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 wxIDropTargetHelper;
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();
// Can only be called during OnXXX methods.
wxDataFormat GetMatchingPair();
// implementation only from now on
// -------------------------------
// do we accept this kind of data?
bool MSWIsAcceptedData(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 MSWSetDataSource(IDataObject *pIDataSource);
// These functions take care of all things necessary to support native drag
// images.
//
// {Init,End}DragImageSupport() are called during Register/Revoke,
// UpdateDragImageOnXXX() functions are called on the corresponding drop
// target events.
void MSWInitDragImageSupport();
void MSWEndDragImageSupport();
void MSWUpdateDragImageOnData(wxCoord x, wxCoord y, wxDragResult res);
void MSWUpdateDragImageOnDragOver(wxCoord x, wxCoord y, wxDragResult res);
void MSWUpdateDragImageOnEnter(wxCoord x, wxCoord y, wxDragResult res);
void MSWUpdateDragImageOnLeave();
private:
// helper used by IsAcceptedData() and GetData()
wxDataFormat MSWGetSupportedFormat(IDataObject *pIDataSource) const;
wxIDropTarget *m_pIDropTarget; // the pointer to our COM interface
IDataObject *m_pIDataSource; // the pointer to the source data object
wxIDropTargetHelper *m_dropTargetHelper; // the drop target helper
wxDECLARE_NO_COPY_CLASS(wxDropTarget);
};
#endif //wxUSE_DRAG_AND_DROP
#endif //_WX_OLEDROPTGT_H