f97c985452
operator correction for VC++ 6 git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@780 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
112 lines
4.2 KiB
C++
112 lines
4.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: ole/droptgt.h
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// Purpose: declaration of the wxDropTarget class
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 06.03.98
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// RCS-ID: $Id$
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// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// prolog
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// ============================================================================
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#ifndef _WX_OLEDROPTGT_H
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#define _WX_OLEDROPTGT_H
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#ifdef __GNUG__
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#pragma interface "droptgt.h"
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#endif
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#if !wxUSE_DRAG_AND_DROP
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#error "You should #define wxUSE_DRAG_AND_DROP to 1 to compile this file!"
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#endif //WX_DRAG_DROP
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// ----------------------------------------------------------------------------
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// forward declarations
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// ----------------------------------------------------------------------------
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class wxIDropTarget;
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struct IDataObject;
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// ----------------------------------------------------------------------------
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// An instance of the class wxDropTarget may be associated with any wxWindow
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// derived object via SetDropTarget() function. If this is done, the virtual
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// methods of wxDropTarget are called when something is dropped on the window.
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//
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// Note that wxDropTarget is an abstract base class (ABC) and you should derive
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// your own class from it implementing pure virtual function in order to use it
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// (all of them, including protected ones which are called by the class itself)
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxDropTarget
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{
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public:
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// ctor & dtor
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wxDropTarget();
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virtual ~wxDropTarget();
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// normally called by wxWindow on window creation/destruction, but might be
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// called `manually' as well. Register() returns true on success.
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bool Register(WXHWND hwnd);
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void Revoke(WXHWND hwnd);
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// do we accept this kind of data?
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virtual bool IsAcceptedData(IDataObject *pIDataSource) const;
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// called when mouse enters/leaves the window: might be used to give
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// some visual feedback to the user
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virtual void OnEnter() { }
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virtual void OnLeave() { }
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// this function is called when data is dropped.
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// (x, y) are the coordinates of the drop
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virtual bool OnDrop(long x, long y, const void *pData) = 0;
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protected:
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// Override these to indicate what kind of data you support: the first
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// format to which data can be converted is used. The classes below show
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// how it can be done in the simplest cases.
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// how many different (clipboard) formats do you support?
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virtual size_t GetFormatCount() const = 0;
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// return the n-th supported format
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virtual wxDataFormat GetFormat(size_t n) const = 0;
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private:
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wxIDropTarget *m_pIDropTarget; // the pointer to COM interface
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};
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// ----------------------------------------------------------------------------
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// A simple wxDropTarget derived class for text data: you only need to
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// override OnDropText() to get something working
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxTextDropTarget : public wxDropTarget
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{
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public:
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virtual bool OnDrop(long x, long y, const void *pData);
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virtual bool OnDropText(long x, long y, const char *psz) = 0;
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protected:
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virtual size_t GetFormatCount() const;
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virtual wxDataFormat GetFormat(size_t n) const;
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};
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// ----------------------------------------------------------------------------
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// A drop target which accepts files (dragged from File Manager or Explorer)
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// ----------------------------------------------------------------------------
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class WXDLLEXPORT wxFileDropTarget : public wxDropTarget
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{
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public:
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virtual bool OnDrop(long x, long y, const void *pData);
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// params: the number of files and the array of file names
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virtual bool OnDropFiles(long x, long y,
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size_t nFiles, const char * const aszFiles[]) = 0;
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protected:
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virtual size_t GetFormatCount() const;
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virtual wxDataFormat GetFormat(size_t n) const;
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};
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// ============================================================================
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#endif //_WX_OLEDROPTGT_H
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