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///////////////////////////////////////////////////////////////////////////////
// Name: wx/msw/enhmeta.h
// Purpose: wxEnhMetaFile class for Win32
// Author: Vadim Zeitlin
// Modified by:
// Created: 13.01.00
// Copyright: (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_MSW_ENHMETA_H_
#define _WX_MSW_ENHMETA_H_
#include "wx/dc.h"
#include "wx/gdiobj.h"
#if wxUSE_DRAG_AND_DROP
#include "wx/dataobj.h"
#endif
// ----------------------------------------------------------------------------
// wxEnhMetaFile: encapsulation of Win32 HENHMETAFILE
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxEnhMetaFile : public wxGDIObject
{
public:
wxEnhMetaFile(const wxString& file = wxEmptyString) : m_filename(file)
{ Init(); }
wxEnhMetaFile(const wxEnhMetaFile& metafile) : wxGDIObject()
{ Init(); Assign(metafile); }
wxEnhMetaFile& operator=(const wxEnhMetaFile& metafile)
{ Free(); Assign(metafile); return *this; }
virtual ~wxEnhMetaFile()
{ Free(); }
// display the picture stored in the metafile on the given DC
bool Play(wxDC *dc, wxRect *rectBound = NULL);
// accessors
virtual bool IsOk() const { return m_hMF != 0; }
wxSize GetSize() const;
int GetWidth() const { return GetSize().x; }
int GetHeight() const { return GetSize().y; }
const wxString& GetFileName() const { return m_filename; }
// copy the metafile to the clipboard: the width and height parameters are
// for backwards compatibility (with wxMetaFile) only, they are ignored by
// this method
bool SetClipboard(int width = 0, int height = 0);
// implementation
WXHANDLE GetHENHMETAFILE() const { return m_hMF; }
void SetHENHMETAFILE(WXHANDLE hMF) { Free(); m_hMF = hMF; }
protected:
void Init();
void Free();
void Assign(const wxEnhMetaFile& mf);
// we don't use these functions (but probably should) but have to implement
// them as they're pure virtual in the base class
virtual wxGDIRefData *CreateGDIRefData() const;
virtual wxGDIRefData *CloneGDIRefData(const wxGDIRefData *data) const;
private:
wxString m_filename;
WXHANDLE m_hMF;
DECLARE_DYNAMIC_CLASS(wxEnhMetaFile)
};
// ----------------------------------------------------------------------------
// wxEnhMetaFileDC: allows to create a wxEnhMetaFile
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxEnhMetaFileDC : public wxDC
{
public:
// the ctor parameters specify the filename (empty for memory metafiles),
// the metafile picture size and the optional description/comment
wxEnhMetaFileDC(const wxString& filename = wxEmptyString,
int width = 0, int height = 0,
const wxString& description = wxEmptyString);
// as above, but takes reference DC as first argument to take resolution,
// size, font metrics etc. from
wxEXPLICIT
wxEnhMetaFileDC(const wxDC& referenceDC,
const wxString& filename = wxEmptyString,
int width = 0, int height = 0,
const wxString& description = wxEmptyString);
// obtain a pointer to the new metafile (caller should delete it)
wxEnhMetaFile *Close();
private:
DECLARE_DYNAMIC_CLASS_NO_COPY(wxEnhMetaFileDC)
};
#if wxUSE_DRAG_AND_DROP
// ----------------------------------------------------------------------------
// wxEnhMetaFileDataObject is a specialization of wxDataObject for enh metafile
// ----------------------------------------------------------------------------
// notice that we want to support both CF_METAFILEPICT and CF_ENHMETAFILE and
// so we derive from wxDataObject and not from wxDataObjectSimple
class WXDLLIMPEXP_CORE wxEnhMetaFileDataObject : public wxDataObject
{
public:
// ctors
wxEnhMetaFileDataObject() { }
wxEnhMetaFileDataObject(const wxEnhMetaFile& metafile)
: m_metafile(metafile) { }
// virtual functions which you may override if you want to provide data on
// demand only - otherwise, the trivial default versions will be used
virtual void SetMetafile(const wxEnhMetaFile& metafile)
{ m_metafile = metafile; }
virtual wxEnhMetaFile GetMetafile() const
{ return m_metafile; }
// implement base class pure virtuals
virtual wxDataFormat GetPreferredFormat(Direction dir) const;
virtual size_t GetFormatCount(Direction dir) const;
virtual void GetAllFormats(wxDataFormat *formats, Direction dir) const;
virtual size_t GetDataSize(const wxDataFormat& format) const;
virtual bool GetDataHere(const wxDataFormat& format, void *buf) const;
virtual bool SetData(const wxDataFormat& format, size_t len,
const void *buf);
protected:
wxEnhMetaFile m_metafile;
wxDECLARE_NO_COPY_CLASS(wxEnhMetaFileDataObject);
};
// ----------------------------------------------------------------------------
// wxEnhMetaFileSimpleDataObject does derive from wxDataObjectSimple which
// makes it more convenient to use (it can be used with wxDataObjectComposite)
// at the price of not supoprting any more CF_METAFILEPICT but only
// CF_ENHMETAFILE
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_CORE wxEnhMetaFileSimpleDataObject : public wxDataObjectSimple
{
public:
// ctors
wxEnhMetaFileSimpleDataObject() : wxDataObjectSimple(wxDF_ENHMETAFILE) { }
wxEnhMetaFileSimpleDataObject(const wxEnhMetaFile& metafile)
: wxDataObjectSimple(wxDF_ENHMETAFILE), m_metafile(metafile) { }
// virtual functions which you may override if you want to provide data on
// demand only - otherwise, the trivial default versions will be used
virtual void SetEnhMetafile(const wxEnhMetaFile& metafile)
{ m_metafile = metafile; }
virtual wxEnhMetaFile GetEnhMetafile() const
{ return m_metafile; }
// 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);
virtual size_t GetDataSize(const wxDataFormat& WXUNUSED(format)) const
{ return GetDataSize(); }
virtual bool GetDataHere(const wxDataFormat& WXUNUSED(format),
void *buf) const
{ return GetDataHere(buf); }
virtual bool SetData(const wxDataFormat& WXUNUSED(format),
size_t len, const void *buf)
{ return SetData(len, buf); }
protected:
wxEnhMetaFile m_metafile;
wxDECLARE_NO_COPY_CLASS(wxEnhMetaFileSimpleDataObject);
};
#endif // wxUSE_DRAG_AND_DROP
#endif // _WX_MSW_ENHMETA_H_
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