wxWidgets/include/wx/motif/dnd.h
1999-10-07 14:07:48 +00:00

179 lines
4.7 KiB
C++

///////////////////////////////////////////////////////////////////////////////
// Name: dnd.h
// Purpose: declaration of wxDropTarget, wxDropSource classes
// Author: Julian Smart
// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin, Robert Roebling, Julian Smart
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DND_H_
#define _WX_DND_H_
#ifdef __GNUG__
#pragma interface
#endif
#include "wx/defs.h"
#if wxUSE_DRAG_AND_DROP
#include "wx/object.h"
#include "wx/string.h"
#include "wx/dataobj.h"
#include "wx/cursor.h"
//-------------------------------------------------------------------------
// classes
//-------------------------------------------------------------------------
class WXDLLEXPORT wxWindow;
class WXDLLEXPORT wxDropTarget;
class WXDLLEXPORT wxTextDropTarget;
class WXDLLEXPORT wxFileDropTarget;
class WXDLLEXPORT wxPrivateDropTarget;
class WXDLLEXPORT wxDropSource;
//-------------------------------------------------------------------------
// wxDropTarget
//-------------------------------------------------------------------------
class WXDLLEXPORT wxDropTarget: public wxObject
{
public:
wxDropTarget();
~wxDropTarget();
virtual void OnEnter() { }
virtual void OnLeave() { }
virtual bool OnDrop( long x, long y, const void *data, size_t size ) = 0;
// Override these to indicate what kind of data you support:
virtual size_t GetFormatCount() const = 0;
virtual wxDataFormat GetFormat(size_t n) const = 0;
// implementation
};
//-------------------------------------------------------------------------
// wxTextDropTarget
//-------------------------------------------------------------------------
class WXDLLEXPORT wxTextDropTarget: public wxDropTarget
{
public:
wxTextDropTarget() {};
virtual bool OnDrop( long x, long y, const void *data, size_t size );
virtual bool OnDropText( long x, long y, const char *psz );
protected:
virtual size_t GetFormatCount() const;
virtual wxDataFormat GetFormat(size_t n) const;
};
//-------------------------------------------------------------------------
// wxPrivateDropTarget
//-------------------------------------------------------------------------
class WXDLLEXPORT wxPrivateDropTarget: public wxDropTarget
{
public:
wxPrivateDropTarget();
// you have to override OnDrop to get at the data
// the string ID identifies the format of clipboard or DnD data. a word
// processor would e.g. add a wxTextDataObject and a wxPrivateDataObject
// to the clipboard - the latter with the Id "WXWORD_FORMAT".
void SetId( const wxString& id )
{ m_id = id; }
wxString GetId()
{ return m_id; }
private:
virtual size_t GetFormatCount() const;
virtual wxDataFormat GetFormat(size_t n) const;
wxString m_id;
};
// ----------------------------------------------------------------------------
// A drop target which accepts files (dragged from File Manager or Explorer)
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxFileDropTarget: public wxDropTarget
{
public:
wxFileDropTarget() {};
virtual bool OnDrop( long x, long y, const void *data, size_t size );
virtual bool OnDropFiles( long x, long y,
size_t nFiles, const char * const aszFiles[] );
protected:
virtual size_t GetFormatCount() const;
virtual wxDataFormat GetFormat(size_t n) const;
};
//-------------------------------------------------------------------------
// wxDropSource
//-------------------------------------------------------------------------
enum wxDragResult
{
wxDragError, // error prevented the d&d operation from completing
wxDragNone, // drag target didn't accept the data
wxDragCopy, // the data was successfully copied
wxDragMove, // the data was successfully moved
wxDragCancel // the operation was cancelled by user (not an error)
};
class WXDLLEXPORT wxDropSource: public wxObject
{
public:
wxDropSource( wxWindow *win );
wxDropSource( wxDataObject &data, wxWindow *win );
~wxDropSource(void);
void SetData( wxDataObject &data );
wxDragResult DoDragDrop( bool bAllowMove = FALSE );
virtual bool GiveFeedback( wxDragResult WXUNUSED(effect), bool WXUNUSED(bScrolling) ) { return TRUE; };
// implementation
#if 0
void RegisterWindow(void);
void UnregisterWindow(void);
wxWindow *m_window;
wxDragResult m_retValue;
wxDataObject *m_data;
wxCursor m_defaultCursor;
wxCursor m_goaheadCursor;
#endif
};
#endif
// wxUSE_DRAG_AND_DROP
#endif
//_WX_DND_H_