dataobj2.h

wxWidgets 是一个跨平台的 GUI 框架。它给开发人员提供了统一的接口

///////////////////////////////////////////////////////////////////////////////
// Name:        os2/dataobj2.h
// Purpose:     declaration of standard wxDataObjectSimple-derived classes
// Author:      David Webster (adapted from Robert Roebling's gtk port
// Modified by:
// Created:     10/21/99
// RCS-ID:      $Id: dataobj2.h,v 1.5 2006/09/05 20:45:58 VZ Exp $
// Copyright:   (c) 1998, 1999 Vadim Zeitlin, Robert Roebling
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_GTK_DATAOBJ2_H_
#define _WX_GTK_DATAOBJ2_H_

// ----------------------------------------------------------------------------
// wxBitmapDataObject is a specialization of wxDataObject for bitmaps
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxBitmapDataObject : public wxBitmapDataObjectBase
{
public:
    // ctors
    wxBitmapDataObject();
    wxBitmapDataObject(const wxBitmap& bitmap);

    // destr
    virtual ~wxBitmapDataObject();

    // override base class virtual to update PNG data too
    virtual void SetBitmap(const wxBitmap& bitmap);

    // implement base class pure virtuals
    // ----------------------------------

    virtual size_t GetDataSize() const ;
    virtual bool GetDataHere(void *buf) const ;
    virtual bool SetData(size_t len, const void *buf);

protected :
    void Init() ;
    void Clear() ;

    void* m_pictHandle ;
    bool m_pictCreated ;
private:
    // Virtual function hiding supression
    size_t GetDataSize(const wxDataFormat& rFormat) const
    { return(wxDataObjectSimple::GetDataSize(rFormat)); }
    bool GetDataHere(const wxDataFormat& rFormat, void* pBuf) const
    { return(wxDataObjectSimple::GetDataHere(rFormat, pBuf)); }
    bool SetData(const wxDataFormat& rFormat, size_t nLen, const void* pBuf)
    { return(wxDataObjectSimple::SetData(rFormat, nLen, pBuf)); }
};

// ----------------------------------------------------------------------------
// wxFileDataObject is a specialization of wxDataObject for file names
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxFileDataObject : public wxFileDataObjectBase
{
public:
    // implement base class pure virtuals
    // ----------------------------------

    void AddFile( const wxString &filename );

    virtual size_t GetDataSize() const;
    virtual bool GetDataHere(void *buf) const;
    virtual bool SetData(size_t len, const void *buf);

private:
    // Virtual function hiding supression
    size_t GetDataSize(const wxDataFormat& rFormat) const
    { return(wxDataObjectSimple::GetDataSize(rFormat)); }
    bool GetDataHere(const wxDataFormat& rFormat, void* pBuf) const
    { return(wxDataObjectSimple::GetDataHere(rFormat, pBuf)); }
    bool SetData(const wxDataFormat& rFormat, size_t nLen, const void* pBuf)
    { return(wxDataObjectSimple::SetData(rFormat, nLen, pBuf)); }
};

#endif // _WX_GTK_DATAOBJ2_H_