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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@3190 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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David Webster
1999-07-29 05:11:30 +00:00
parent c2ff79b17b
commit 0e320a79f1
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include/wx/os2/dnd.h Normal file
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///////////////////////////////////////////////////////////////////////////////
// Name: dnd.h
// Purpose: Declaration of the wxDropTarget, wxDropSource class etc.
// Author: AUTHOR
// RCS-ID: $Id$
// Copyright: (c) 1998 AUTHOR
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DND_H_
#define _WX_DND_H_
#ifdef __GNUG__
#pragma interface "dnd.h"
#endif
#include "wx/defs.h"
#include "wx/object.h"
#include "wx/string.h"
#include "wx/cursor.h"
//-------------------------------------------------------------------------
// classes
//-------------------------------------------------------------------------
class WXDLLEXPORT wxWindow;
class WXDLLEXPORT wxDataObject;
class WXDLLEXPORT wxTextDataObject;
class WXDLLEXPORT wxFileDataObject;
class WXDLLEXPORT wxDropTarget;
class WXDLLEXPORT wxTextDropTarget;
class WXDLLEXPORT wxFileDropTarget;
class WXDLLEXPORT wxDropSource;
//-------------------------------------------------------------------------
// wxDataFormat (internal)
//-------------------------------------------------------------------------
class wxDataFormat : public wxObject
{
DECLARE_CLASS( wxDataFormat )
public:
wxDataFormat();
wxDataFormat( wxDataFormatId type );
wxDataFormat( const wxString &id );
wxDataFormat( const wxChar *id );
wxDataFormat( const wxDataFormat &format );
void SetType( wxDataFormatId type );
wxDataFormatId GetType() const;
/* 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 "application/wxword", an
* image manipulation program would put a wxBitmapDataObject and a
* wxPrivateDataObject to the clipboard - the latter with "image/png". */
wxString GetId() const;
void SetId( const wxChar *id );
// implicit conversion to wxDataFormatId
operator wxDataFormatId() const { return m_type; }
bool operator==(wxDataFormatId type) const { return m_type == type; }
bool operator!=(wxDataFormatId type) const { return m_type != type; }
private:
wxDataFormatId m_type;
wxString m_id;
};
//-------------------------------------------------------------------------
// wxDataObject
//-------------------------------------------------------------------------
class WXDLLEXPORT wxDataObject: public wxObject
{
public:
// all data formats (values are the same as in windows.h, do not change!)
enum StdFormat
{
Invalid,
Text,
Bitmap,
MetafilePict,
Sylk,
Dif,
Tiff,
OemText,
Dib,
Palette,
Pendata,
Riff,
Wave,
UnicodeText,
EnhMetafile,
Hdrop,
Locale,
Max
};
// function to return symbolic name of clipboard format (debug messages)
static const char *GetFormatName(wxDataFormat format);
// ctor & dtor
wxDataObject() {};
~wxDataObject() {};
// pure virtuals to override
// get the best suited format for our data
virtual wxDataFormat GetPreferredFormat() const = 0;
// decide if we support this format (should be one of values of
// StdFormat enumerations or a user-defined format)
virtual bool IsSupportedFormat(wxDataFormat format) const = 0;
// get the (total) size of data
virtual size_t GetDataSize() const = 0;
// copy raw data to provided pointer
virtual void GetDataHere(void *pBuf) const = 0;
};
// ----------------------------------------------------------------------------
// wxTextDataObject is a specialization of wxDataObject for text data
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxTextDataObject : public wxDataObject
{
public:
// ctors
wxTextDataObject() { }
wxTextDataObject(const wxString& strText) : m_strText(strText) { }
void Init(const wxString& strText) { m_strText = strText; }
// implement base class pure virtuals
virtual wxDataFormat GetPreferredFormat() const
{ return wxDF_TEXT; }
virtual bool IsSupportedFormat(wxDataFormat format) const
{ return format == wxDF_TEXT; }
virtual size_t GetDataSize() const
{ return m_strText.Len() + 1; } // +1 for trailing '\0'of course
virtual void GetDataHere(void *pBuf) const
{ memcpy(pBuf, m_strText.c_str(), GetDataSize()); }
private:
wxString m_strText;
};
// ----------------------------------------------------------------------------
// wxFileDataObject is a specialization of wxDataObject for file names
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxFileDataObject : public wxDataObject
{
public:
wxFileDataObject(void) { }
void AddFile( const wxString &file )
{ m_files += file; m_files += ";"; }
// implement base class pure virtuals
virtual wxDataFormat GetPreferredFormat() const
{ return wxDF_FILENAME; }
virtual bool IsSupportedFormat(wxDataFormat format) const
{ return format == wxDF_FILENAME; }
virtual size_t GetDataSize() const
{ return m_files.Len() + 1; } // +1 for trailing '\0'of course
virtual void GetDataHere(void *pBuf) const
{ memcpy(pBuf, m_files.c_str(), GetDataSize()); }
private:
wxString m_files;
};
//-------------------------------------------------------------------------
// wxDropTarget
//-------------------------------------------------------------------------
class WXDLLEXPORT wxDropTarget: public wxObject
{
public:
wxDropTarget();
~wxDropTarget();
virtual void OnEnter() { }
virtual void OnLeave() { }
virtual bool OnDrop( long x, long y, const void *pData ) = 0;
// protected:
friend wxWindow;
// Override these to indicate what kind of data you support:
virtual size_t GetFormatCount() const = 0;
virtual wxDataFormat GetFormat(size_t n) const = 0;
};
//-------------------------------------------------------------------------
// wxTextDropTarget
//-------------------------------------------------------------------------
class WXDLLEXPORT wxTextDropTarget: public wxDropTarget
{
public:
wxTextDropTarget() {};
virtual bool OnDrop( long x, long y, const void *pData );
virtual bool OnDropText( long x, long y, const char *psz );
protected:
virtual size_t GetFormatCount() const;
virtual wxDataFormat GetFormat(size_t n) const;
};
// ----------------------------------------------------------------------------
// 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 *pData);
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; };
protected:
wxDataObject *m_data;
};
#endif
//_WX_DND_H_